Ministry of Education, Science and Technological Development of the Republic of Serbia

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Ministry of Education, Science and Technological Development of the Republic of Serbia

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Publications

Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme

Janković, Bojan Ž.; Manić, Nebojša G.

(2021)

TY  - JOUR
AU  - Janković, Bojan Ž.
AU  - Manić, Nebojša G.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9724
AB  - Thermally accelerated oxidative degradation of wolfberry pulp was kinetically monitored using model-free and model-based approaches. Kinetic calculations were performed based on simultaneous thermal analysis measurements in an air at four different heating rates. From kinetic analysis, new developed mechanistic scheme which is responsible for wolfberries anti-oxidative behavior was proposed. It was found that thermo-oxidative process proceeds through multiplestep mechanism including sum of two independent reaction sets, via consecutive and competitive steps. It was established that rutoside degradation pathway to flavonol through hydrolysis reaction is rate-determining step of considered process. Furthermore, it was found that key flavonol compound degraded by competitive reactions mechanism forming such kinetic branches, which lead to compounds responsible for wolfberries antioxidant activity. It was established that flavonol oxidative cleavage reaction and oxidative polymerization are main chemical routes which are very important in a complex antioxidant mechanism for scavenging free radicals in wolfberries oxidative stress response.
T2  - Food Chemistry
T1  - Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme
VL  - 343
SP  - 128530
DO  - 10.1016/j.foodchem.2020.128530
ER  - 
@article{
author = "Janković, Bojan Ž. and Manić, Nebojša G.",
year = "2021",
abstract = "Thermally accelerated oxidative degradation of wolfberry pulp was kinetically monitored using model-free and model-based approaches. Kinetic calculations were performed based on simultaneous thermal analysis measurements in an air at four different heating rates. From kinetic analysis, new developed mechanistic scheme which is responsible for wolfberries anti-oxidative behavior was proposed. It was found that thermo-oxidative process proceeds through multiplestep mechanism including sum of two independent reaction sets, via consecutive and competitive steps. It was established that rutoside degradation pathway to flavonol through hydrolysis reaction is rate-determining step of considered process. Furthermore, it was found that key flavonol compound degraded by competitive reactions mechanism forming such kinetic branches, which lead to compounds responsible for wolfberries antioxidant activity. It was established that flavonol oxidative cleavage reaction and oxidative polymerization are main chemical routes which are very important in a complex antioxidant mechanism for scavenging free radicals in wolfberries oxidative stress response.",
journal = "Food Chemistry",
title = "Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme",
volume = "343",
pages = "128530",
doi = "10.1016/j.foodchem.2020.128530"
}
Janković, B. Ž.,& Manić, N. G.. (2021). Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme. in Food Chemistry, 343, 128530.
https://doi.org/10.1016/j.foodchem.2020.128530
Janković BŽ, Manić NG. Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme. in Food Chemistry. 2021;343:128530.
doi:10.1016/j.foodchem.2020.128530 .
Janković, Bojan Ž., Manić, Nebojša G., "Model-free and model-based analysis of thermo-oxidative response of wolfberries: A new developed mechanistic scheme" in Food Chemistry, 343 (2021):128530,
https://doi.org/10.1016/j.foodchem.2020.128530 . .

Effects of Gentiana lutea Root on Vascular Diseases

Joksić, Gordana; Radak, Đorđe; Sudar-Milovanović, Emina; Obradović, Milan M.; Radovanović, Jelena V.; Isenović, Esma R.

(2021)

TY  - JOUR
AU  - Joksić, Gordana
AU  - Radak, Đorđe
AU  - Sudar-Milovanović, Emina
AU  - Obradović, Milan M.
AU  - Radovanović, Jelena V.
AU  - Isenović, Esma R.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9407
AB  - Background: Gentiana lutea (GL), commonly known as yellow gentian, bitter root, and bit-terwort, belongs to family Gentianaceae. GL belongs to genus Gentiana, which is a rich natural source of iridoids, secoiridoids, xantones, flavonoids, triterpenoids, and carbohydrates. Medicinal plants from Gentiana species have anti-oxidant, anti-inflammatory, anti-mitogenic, anti-proliferative, and lipid-lowering effects, as well as a cardioprotective, hypotensive, vasodilator and anti-platelet activities. Objective: We reviewed the recent literature related to the effects of Gentiana species, and their active components on vascular diseases. Methods: Data used for this review were obtained by searching the electronic database [PUB-MED/MEDLINE 1973-February 2020]. The primary data search terms of interest were: Gentiana lutea, Gentienacea family, phytochemistry, vascular diseases, treatment of vascular diseases, anti-oxidant, anti-inflammatory, anti-atherogenic. Conclusion: Gentiana species and their constituents affect many different factors related to vascular disease development and progression. Therefore, Gentiana-based therapeutics represent potentially use-ful drugs for the management of vascular diseases. © 2021 Bentham Science Publishers.
T2  - Current Vascular Pharmacology
T1  - Effects of Gentiana lutea Root on Vascular Diseases
VL  - 19
IS  - 4
SP  - 359
EP  - 369
DO  - 10.2174/1570161118666200529111314
ER  - 
@article{
author = "Joksić, Gordana and Radak, Đorđe and Sudar-Milovanović, Emina and Obradović, Milan M. and Radovanović, Jelena V. and Isenović, Esma R.",
year = "2021",
abstract = "Background: Gentiana lutea (GL), commonly known as yellow gentian, bitter root, and bit-terwort, belongs to family Gentianaceae. GL belongs to genus Gentiana, which is a rich natural source of iridoids, secoiridoids, xantones, flavonoids, triterpenoids, and carbohydrates. Medicinal plants from Gentiana species have anti-oxidant, anti-inflammatory, anti-mitogenic, anti-proliferative, and lipid-lowering effects, as well as a cardioprotective, hypotensive, vasodilator and anti-platelet activities. Objective: We reviewed the recent literature related to the effects of Gentiana species, and their active components on vascular diseases. Methods: Data used for this review were obtained by searching the electronic database [PUB-MED/MEDLINE 1973-February 2020]. The primary data search terms of interest were: Gentiana lutea, Gentienacea family, phytochemistry, vascular diseases, treatment of vascular diseases, anti-oxidant, anti-inflammatory, anti-atherogenic. Conclusion: Gentiana species and their constituents affect many different factors related to vascular disease development and progression. Therefore, Gentiana-based therapeutics represent potentially use-ful drugs for the management of vascular diseases. © 2021 Bentham Science Publishers.",
journal = "Current Vascular Pharmacology",
title = "Effects of Gentiana lutea Root on Vascular Diseases",
volume = "19",
number = "4",
pages = "359-369",
doi = "10.2174/1570161118666200529111314"
}
Joksić, G., Radak, Đ., Sudar-Milovanović, E., Obradović, M. M., Radovanović, J. V.,& Isenović, E. R.. (2021). Effects of Gentiana lutea Root on Vascular Diseases. in Current Vascular Pharmacology, 19(4), 359-369.
https://doi.org/10.2174/1570161118666200529111314
Joksić G, Radak Đ, Sudar-Milovanović E, Obradović MM, Radovanović JV, Isenović ER. Effects of Gentiana lutea Root on Vascular Diseases. in Current Vascular Pharmacology. 2021;19(4):359-369.
doi:10.2174/1570161118666200529111314 .
Joksić, Gordana, Radak, Đorđe, Sudar-Milovanović, Emina, Obradović, Milan M., Radovanović, Jelena V., Isenović, Esma R., "Effects of Gentiana lutea Root on Vascular Diseases" in Current Vascular Pharmacology, 19, no. 4 (2021):359-369,
https://doi.org/10.2174/1570161118666200529111314 . .
1

Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis

Kolić, Ivana; Stojković, Ljiljana S.; Stanković, Aleksandra; Stefanović, Milan; Dinčić, Evica; Živković, Maja

(2021)

TY  - JOUR
AU  - Kolić, Ivana
AU  - Stojković, Ljiljana S.
AU  - Stanković, Aleksandra
AU  - Stefanović, Milan
AU  - Dinčić, Evica
AU  - Živković, Maja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9542
AB  - Background: Leptin (LEP), leptin receptor (LEPR) and peroxisome proliferator-activated receptor gamma co-activator 1-alpha (PGC1A) are involved in the pathogenesis of multiple sclerosis (MS) by affecting the inflammatory response and reactive oxygen species production. LEP rs7799039 and LEPR rs1137101 genetic variants modify the serum LEP levels and PGC1A rs8192678 alters the PGC1A activity. The study objective was to explore the associations of these variants with susceptibility to MS, disease course/clinical parameters and also with peripheral blood mononuclear cell expression of the target genes and plasma LEP concentrations, in the study subjects. Methods: The study groups included 528 patients with MS and 429 controls. TaqMan® assays were used for genotyping and gene expression quantification. The Chi-square, parametric and nonparametric tests and simple/multiple logistic regression were performed for the statistical analysis of data. Results: A multiple logistic regression model including all three investigated variants, applied to patients (RRMS + SPMS) and controls, showed that PGC1A rs8192678 minor allele had an increased risk for the occurrence of disease, with OR (95%CI) = 1,32 (1,01–1,73), P = 0,04. Between-effect of gender and LEPR variant on the multiple sclerosis severity score (MSSS) was identified (P = 0,005). In male patients (relapsing-remitting and secondary progressive), LEPR minor allele carriers had increased MSSS (GG + AG vs AA, median (minimum–maximum) = 5,38 (0,64–9,88) vs 4,27 (0,78–9,63); P = 0,01, Padj = 0,03). In relapsing-remitting patients LEP rs7799039 affected the LEP gene expression (P = 0,006; Padj = 0,04). Conclusion: The current findings implicate an impact of investigated genetic variants on the pathogenesis of MS. © 2021 Elsevier B.V.
T2  - Gene
T1  - Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis
VL  - 774
SP  - 145422
DO  - 10.1016/j.gene.2021.145422
ER  - 
@article{
author = "Kolić, Ivana and Stojković, Ljiljana S. and Stanković, Aleksandra and Stefanović, Milan and Dinčić, Evica and Živković, Maja",
year = "2021",
abstract = "Background: Leptin (LEP), leptin receptor (LEPR) and peroxisome proliferator-activated receptor gamma co-activator 1-alpha (PGC1A) are involved in the pathogenesis of multiple sclerosis (MS) by affecting the inflammatory response and reactive oxygen species production. LEP rs7799039 and LEPR rs1137101 genetic variants modify the serum LEP levels and PGC1A rs8192678 alters the PGC1A activity. The study objective was to explore the associations of these variants with susceptibility to MS, disease course/clinical parameters and also with peripheral blood mononuclear cell expression of the target genes and plasma LEP concentrations, in the study subjects. Methods: The study groups included 528 patients with MS and 429 controls. TaqMan® assays were used for genotyping and gene expression quantification. The Chi-square, parametric and nonparametric tests and simple/multiple logistic regression were performed for the statistical analysis of data. Results: A multiple logistic regression model including all three investigated variants, applied to patients (RRMS + SPMS) and controls, showed that PGC1A rs8192678 minor allele had an increased risk for the occurrence of disease, with OR (95%CI) = 1,32 (1,01–1,73), P = 0,04. Between-effect of gender and LEPR variant on the multiple sclerosis severity score (MSSS) was identified (P = 0,005). In male patients (relapsing-remitting and secondary progressive), LEPR minor allele carriers had increased MSSS (GG + AG vs AA, median (minimum–maximum) = 5,38 (0,64–9,88) vs 4,27 (0,78–9,63); P = 0,01, Padj = 0,03). In relapsing-remitting patients LEP rs7799039 affected the LEP gene expression (P = 0,006; Padj = 0,04). Conclusion: The current findings implicate an impact of investigated genetic variants on the pathogenesis of MS. © 2021 Elsevier B.V.",
journal = "Gene",
title = "Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis",
volume = "774",
pages = "145422",
doi = "10.1016/j.gene.2021.145422"
}
Kolić, I., Stojković, L. S., Stanković, A., Stefanović, M., Dinčić, E.,& Živković, M.. (2021). Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis. in Gene, 774, 145422.
https://doi.org/10.1016/j.gene.2021.145422
Kolić I, Stojković LS, Stanković A, Stefanović M, Dinčić E, Živković M. Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis. in Gene. 2021;774:145422.
doi:10.1016/j.gene.2021.145422 .
Kolić, Ivana, Stojković, Ljiljana S., Stanković, Aleksandra, Stefanović, Milan, Dinčić, Evica, Živković, Maja, "Association study of rs7799039, rs1137101 and rs8192678 gene variants with disease susceptibility/severity and corresponding LEP, LEPR and PGC1A gene expression in multiple sclerosis" in Gene, 774 (2021):145422,
https://doi.org/10.1016/j.gene.2021.145422 . .
1

Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination

Radojević, Miloš; Janković, Bojan Ž.; Stojiljković, Dragoslava; Jovanović, Vladimir; Čeković, Ivana; Manić, Nebojša G.

(2021)

TY  - JOUR
AU  - Radojević, Miloš
AU  - Janković, Bojan Ž.
AU  - Stojiljković, Dragoslava
AU  - Jovanović, Vladimir
AU  - Čeković, Ivana
AU  - Manić, Nebojša G.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9138
AB  - This paper provides in-depth knowledge about the evolved gas analysis interpretation via newly proposed semi-quantitative approach, arising from thermogravimetric analysis (TGA) – mass spectrometry (MS) coupled measurements, for studying pyrolysis behavior of three kinds of biomass waste materials (spent coffee grounds, beech sawdust and wheat straw). TGA – MS coupling allows accurate correlation between molecular ion peak and fragment peaks to the corresponding mass loss rates from derivative thermogravimetry curves. Within proposed semi-quantitative analysis, MS spectra were interpreted through the comparative analysis of compounds fragments and of the compound itself, where the single atomic mass unit was identified by multiple compounds exhibition. It was shown that by this procedure which involves overlapping multiple curves supervising, the identification of gases in volatiles complex scheme becomes more simplified. By setting up semi-quantitative formulas, easy and reliable calculations of gaseous products yield and syngas energy capacities are possible to achieve. The H2/CO ratio derived from the proposed method for wood waste product (sawdust) is in an excellent agreement with H2/CO ratio for sawdust syngas production, in fuel reactor for biomass gasification and H2 production. © 2021 Elsevier B.V.
T2  - Thermochimica Acta
T1  - Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination
VL  - 699
SP  - 178912
DO  - 10.1016/j.tca.2021.178912
ER  - 
@article{
author = "Radojević, Miloš and Janković, Bojan Ž. and Stojiljković, Dragoslava and Jovanović, Vladimir and Čeković, Ivana and Manić, Nebojša G.",
year = "2021",
abstract = "This paper provides in-depth knowledge about the evolved gas analysis interpretation via newly proposed semi-quantitative approach, arising from thermogravimetric analysis (TGA) – mass spectrometry (MS) coupled measurements, for studying pyrolysis behavior of three kinds of biomass waste materials (spent coffee grounds, beech sawdust and wheat straw). TGA – MS coupling allows accurate correlation between molecular ion peak and fragment peaks to the corresponding mass loss rates from derivative thermogravimetry curves. Within proposed semi-quantitative analysis, MS spectra were interpreted through the comparative analysis of compounds fragments and of the compound itself, where the single atomic mass unit was identified by multiple compounds exhibition. It was shown that by this procedure which involves overlapping multiple curves supervising, the identification of gases in volatiles complex scheme becomes more simplified. By setting up semi-quantitative formulas, easy and reliable calculations of gaseous products yield and syngas energy capacities are possible to achieve. The H2/CO ratio derived from the proposed method for wood waste product (sawdust) is in an excellent agreement with H2/CO ratio for sawdust syngas production, in fuel reactor for biomass gasification and H2 production. © 2021 Elsevier B.V.",
journal = "Thermochimica Acta",
title = "Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination",
volume = "699",
pages = "178912",
doi = "10.1016/j.tca.2021.178912"
}
Radojević, M., Janković, B. Ž., Stojiljković, D., Jovanović, V., Čeković, I.,& Manić, N. G.. (2021). Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination. in Thermochimica Acta, 699, 178912.
https://doi.org/10.1016/j.tca.2021.178912
Radojević M, Janković BŽ, Stojiljković D, Jovanović V, Čeković I, Manić NG. Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination. in Thermochimica Acta. 2021;699:178912.
doi:10.1016/j.tca.2021.178912 .
Radojević, Miloš, Janković, Bojan Ž., Stojiljković, Dragoslava, Jovanović, Vladimir, Čeković, Ivana, Manić, Nebojša G., "Improved TGA-MS measurements for evolved gas analysis (EGA) during pyrolysis process of various biomass feedstocks. Syngas energy balance determination" in Thermochimica Acta, 699 (2021):178912,
https://doi.org/10.1016/j.tca.2021.178912 . .
2
1
2

Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction

Janković, Bojan Ž.; Manić, Nebojša G.; Dodevski, Vladimir

(2021)

TY  - JOUR
AU  - Janković, Bojan Ž.
AU  - Manić, Nebojša G.
AU  - Dodevski, Vladimir
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9161
AB  - This paper provides insights into understanding the physical and chemical changes that take place during re-heating process of Poplar fluff bio-char derived by carbonization at high operating temperature (850 °C). Bio-char re-heating experiments were performed by simultaneous TGA-DTG-DSC techniques in N2 atmosphere at 5, 10, 15 and 20 °C min−1. Kinetic modeling of the process was done through implementation of model-free and model-based approaches. It was identified that re-heating process contains two stages. The first was described by single consecutive reaction step (up to 200 °C) which is attributed to removal of physisorbed moisture at surface and in pores of carbonized material, while second was described by multiple reactions, including one consecutive step and two competitive steps. In the last, consecutive pathway includes reduction of PAH compounds (400–600 °C) into smaller ones, changing degree of condensation of carbon structure continuously. Competitive steps encompass competition between C10H8 (naphthalene) (700–780 °C) and C9H8 (indene) (700–750 °C) molecules decomposition. It was found that used heating rates have great influence on regulating the amount of gaseous (combustible) products from these reactions. It was established that internal heat and mass transfer processes control the release of products. Changing the pyrolysis mechanism with temperature of carbonized bio-char is the main factor for occurrence of true kinetic compensation effect, which is also discussed by applied isothermal life-time analysis. © 2021 Elsevier Ltd
T2  - Fuel
T1  - Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction
VL  - 296
SP  - 120637
DO  - 10.1016/j.fuel.2021.120637
ER  - 
@article{
author = "Janković, Bojan Ž. and Manić, Nebojša G. and Dodevski, Vladimir",
year = "2021",
abstract = "This paper provides insights into understanding the physical and chemical changes that take place during re-heating process of Poplar fluff bio-char derived by carbonization at high operating temperature (850 °C). Bio-char re-heating experiments were performed by simultaneous TGA-DTG-DSC techniques in N2 atmosphere at 5, 10, 15 and 20 °C min−1. Kinetic modeling of the process was done through implementation of model-free and model-based approaches. It was identified that re-heating process contains two stages. The first was described by single consecutive reaction step (up to 200 °C) which is attributed to removal of physisorbed moisture at surface and in pores of carbonized material, while second was described by multiple reactions, including one consecutive step and two competitive steps. In the last, consecutive pathway includes reduction of PAH compounds (400–600 °C) into smaller ones, changing degree of condensation of carbon structure continuously. Competitive steps encompass competition between C10H8 (naphthalene) (700–780 °C) and C9H8 (indene) (700–750 °C) molecules decomposition. It was found that used heating rates have great influence on regulating the amount of gaseous (combustible) products from these reactions. It was established that internal heat and mass transfer processes control the release of products. Changing the pyrolysis mechanism with temperature of carbonized bio-char is the main factor for occurrence of true kinetic compensation effect, which is also discussed by applied isothermal life-time analysis. © 2021 Elsevier Ltd",
journal = "Fuel",
title = "Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction",
volume = "296",
pages = "120637",
doi = "10.1016/j.fuel.2021.120637"
}
Janković, B. Ž., Manić, N. G.,& Dodevski, V.. (2021). Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction. in Fuel, 296, 120637.
https://doi.org/10.1016/j.fuel.2021.120637
Janković BŽ, Manić NG, Dodevski V. Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction. in Fuel. 2021;296:120637.
doi:10.1016/j.fuel.2021.120637 .
Janković, Bojan Ž., Manić, Nebojša G., Dodevski, Vladimir, "Pyrolysis kinetics of Poplar fluff bio-char produced at high carbonization temperature: A mechanistic study and isothermal life-time prediction" in Fuel, 296 (2021):120637,
https://doi.org/10.1016/j.fuel.2021.120637 . .
1

Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering

Matović, Branko; Maletaškić, Jelena; Prikhna, Tatiana; Urbanovich, Vladimir; Girman, Vladimir; Lisnichuk, Maksym; Todorović, Bratislav; Yoshida, Kutsami; Cvijović-Alagić, Ivana

(2021)

TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Prikhna, Tatiana
AU  - Urbanovich, Vladimir
AU  - Girman, Vladimir
AU  - Lisnichuk, Maksym
AU  - Todorović, Bratislav
AU  - Yoshida, Kutsami
AU  - Cvijović-Alagić, Ivana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9405
AB  - Additive-free boron carbide (B4C) – silicon carbide (SiC) ceramic composites with different B4C and β-SiC powders ratio were densified using the high-pressure “anvil-type with hollows” apparatus at 1500 °C under a pressure of 4 GPa for 60 s in air. The effect of starting powders ratio on the composites sintering behavior, relative density, microstructural development, and thermomechanical properties was studied. The sintered samples hardness was found to be in the range from 24 to 31 GPa. The thermal conductivity measurements, conducted in the temperature range from room temperature to 1000 °C, showed that the thermal diffusivity of sintered samples was between 6 and 9.5 mm2/s whereas the thermal conductivity was in the range from 16 to 28 W/(m K). The results of this study show that the high-pressure sintering can be a very effective low-temperature densification method for the obtainment of additive-free B4C - β-SiC ceramic composites. © 2021 Elsevier Ltd
T2  - Journal of the European Ceramic Society
T1  - Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering
VL  - 41
IS  - 9
SP  - 4755
EP  - 4760
DO  - 10.1016/j.jeurceramsoc.2021.03.047
ER  - 
@article{
author = "Matović, Branko and Maletaškić, Jelena and Prikhna, Tatiana and Urbanovich, Vladimir and Girman, Vladimir and Lisnichuk, Maksym and Todorović, Bratislav and Yoshida, Kutsami and Cvijović-Alagić, Ivana",
year = "2021",
abstract = "Additive-free boron carbide (B4C) – silicon carbide (SiC) ceramic composites with different B4C and β-SiC powders ratio were densified using the high-pressure “anvil-type with hollows” apparatus at 1500 °C under a pressure of 4 GPa for 60 s in air. The effect of starting powders ratio on the composites sintering behavior, relative density, microstructural development, and thermomechanical properties was studied. The sintered samples hardness was found to be in the range from 24 to 31 GPa. The thermal conductivity measurements, conducted in the temperature range from room temperature to 1000 °C, showed that the thermal diffusivity of sintered samples was between 6 and 9.5 mm2/s whereas the thermal conductivity was in the range from 16 to 28 W/(m K). The results of this study show that the high-pressure sintering can be a very effective low-temperature densification method for the obtainment of additive-free B4C - β-SiC ceramic composites. © 2021 Elsevier Ltd",
journal = "Journal of the European Ceramic Society",
title = "Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering",
volume = "41",
number = "9",
pages = "4755-4760",
doi = "10.1016/j.jeurceramsoc.2021.03.047"
}
Matović, B., Maletaškić, J., Prikhna, T., Urbanovich, V., Girman, V., Lisnichuk, M., Todorović, B., Yoshida, K.,& Cvijović-Alagić, I.. (2021). Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering. in Journal of the European Ceramic Society, 41(9), 4755-4760.
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047
Matović B, Maletaškić J, Prikhna T, Urbanovich V, Girman V, Lisnichuk M, Todorović B, Yoshida K, Cvijović-Alagić I. Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering. in Journal of the European Ceramic Society. 2021;41(9):4755-4760.
doi:10.1016/j.jeurceramsoc.2021.03.047 .
Matović, Branko, Maletaškić, Jelena, Prikhna, Tatiana, Urbanovich, Vladimir, Girman, Vladimir, Lisnichuk, Maksym, Todorović, Bratislav, Yoshida, Kutsami, Cvijović-Alagić, Ivana, "Characterization of B4C-SiC ceramic composites prepared by ultra-high pressure sintering" in Journal of the European Ceramic Society, 41, no. 9 (2021):4755-4760,
https://doi.org/10.1016/j.jeurceramsoc.2021.03.047 . .
2
2
2

Vendor‐independent skin dose mapping application for interventional radiology and cardiology

Krajinović, Marko; Kržanović, Nikola; Ciraj-Bjelac, Olivera

(2021)

TY  - JOUR
AU  - Krajinović, Marko
AU  - Kržanović, Nikola
AU  - Ciraj-Bjelac, Olivera
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9519
AB  - Purpose: The purpose of this paper is to present and validate an originally developed application SkinCare used for skin dose mapping in interventional procedures, which are associated with relatively high radiation doses to the patient’s skin and possible skin reactions. Methods: SkinCare is an application tool for generating skin dose maps following interventional radiology and cardiology procedures using the realistic 3D patient models. Skin dose is calculated using data from Digital Imaging and Communications in Medicine (DICOM) Radiation Dose Structured Reports (RDSRs). SkinCare validation was performed by using the data from the Siemens Artis Zee Biplane fluoroscopy system and conducting “Acceptance and quality control protocols for skin dose calculating software solutions in interventional cardiology” developed and tested in the frame of the VERIDIC project. XR-RV3 Gafchromic films were used as dosimeters to compare peak skin doses (PSDs) and dose maps obtained through measurements and calculations. DICOM RDSRs from four fluoroscopy systems of different vendors (Canon, GE, Philips, and Siemens) were used for the development of the SkinCare and for the comparison of skin dose maps generated using SkinCare to skin dose maps generated by different commercial software tools (Dose Tracking System (DTS) from Canon, RadimetricsTM from Bayer and RDM from MEDSQUARE). The same RDSRs generated during a cardiology clinical procedure (percutaneous coronary intervention—PCI) were used for comparison. Results: Validation performed using VERIDIC's protocols for skin dose calculation software showed that PSD calculated by SkinCare is within 17% and 16% accuracy compared to measurements using XR-RV3 Gafchromic films for fundamental irradiation setups and simplified clinical procedures, respectively. Good visual agreement between dose maps generated by SkinCare and DTS, RadimetricsTM and RDM was obtained. Conclusions: SkinCare is proved to be very convenient solution that can be used for monitoring delivered dose following interventional procedures. © 2021 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.
T2  - Journal of Applied Clinical Medical Physics
T1  - Vendor‐independent skin dose mapping application for interventional radiology and cardiology
VL  - 22
IS  - 2
SP  - 145
EP  - 157
DO  - 10.1002/acm2.13167
ER  - 
@article{
author = "Krajinović, Marko and Kržanović, Nikola and Ciraj-Bjelac, Olivera",
year = "2021",
abstract = "Purpose: The purpose of this paper is to present and validate an originally developed application SkinCare used for skin dose mapping in interventional procedures, which are associated with relatively high radiation doses to the patient’s skin and possible skin reactions. Methods: SkinCare is an application tool for generating skin dose maps following interventional radiology and cardiology procedures using the realistic 3D patient models. Skin dose is calculated using data from Digital Imaging and Communications in Medicine (DICOM) Radiation Dose Structured Reports (RDSRs). SkinCare validation was performed by using the data from the Siemens Artis Zee Biplane fluoroscopy system and conducting “Acceptance and quality control protocols for skin dose calculating software solutions in interventional cardiology” developed and tested in the frame of the VERIDIC project. XR-RV3 Gafchromic films were used as dosimeters to compare peak skin doses (PSDs) and dose maps obtained through measurements and calculations. DICOM RDSRs from four fluoroscopy systems of different vendors (Canon, GE, Philips, and Siemens) were used for the development of the SkinCare and for the comparison of skin dose maps generated using SkinCare to skin dose maps generated by different commercial software tools (Dose Tracking System (DTS) from Canon, RadimetricsTM from Bayer and RDM from MEDSQUARE). The same RDSRs generated during a cardiology clinical procedure (percutaneous coronary intervention—PCI) were used for comparison. Results: Validation performed using VERIDIC's protocols for skin dose calculation software showed that PSD calculated by SkinCare is within 17% and 16% accuracy compared to measurements using XR-RV3 Gafchromic films for fundamental irradiation setups and simplified clinical procedures, respectively. Good visual agreement between dose maps generated by SkinCare and DTS, RadimetricsTM and RDM was obtained. Conclusions: SkinCare is proved to be very convenient solution that can be used for monitoring delivered dose following interventional procedures. © 2021 The Authors. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. on behalf of American Association of Physicists in Medicine.",
journal = "Journal of Applied Clinical Medical Physics",
title = "Vendor‐independent skin dose mapping application for interventional radiology and cardiology",
volume = "22",
number = "2",
pages = "145-157",
doi = "10.1002/acm2.13167"
}
Krajinović, M., Kržanović, N.,& Ciraj-Bjelac, O.. (2021). Vendor‐independent skin dose mapping application for interventional radiology and cardiology. in Journal of Applied Clinical Medical Physics, 22(2), 145-157.
https://doi.org/10.1002/acm2.13167
Krajinović M, Kržanović N, Ciraj-Bjelac O. Vendor‐independent skin dose mapping application for interventional radiology and cardiology. in Journal of Applied Clinical Medical Physics. 2021;22(2):145-157.
doi:10.1002/acm2.13167 .
Krajinović, Marko, Kržanović, Nikola, Ciraj-Bjelac, Olivera, "Vendor‐independent skin dose mapping application for interventional radiology and cardiology" in Journal of Applied Clinical Medical Physics, 22, no. 2 (2021):145-157,
https://doi.org/10.1002/acm2.13167 . .
1
2
1
1

Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?

Samardžić, Vladimir; Banjac, Katarina; Obradović, Milan; Gluvić, Zoran; Isenović, Esma R.

(2021)

TY  - JOUR
AU  - Samardžić, Vladimir
AU  - Banjac, Katarina
AU  - Obradović, Milan
AU  - Gluvić, Zoran
AU  - Isenović, Esma R.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9697
AB  - Thyroid nodules are among highly prevalent thyroid diseases. To make a distinction between benign and malignant thyroid nodules are of cumbersome significance for each endocrinologist. There is no unique and completely accurate diagnostic test, method, or even biomarker that points to a malignant thyroid nodule. Many studies in modern thyroidology are conducted to determine the usefulness of individual biomarkers, which could help clinicians detect thyroid nodules' potential malignant nature. One interesting biomarker with a promising diagnostic potential for the thyroid gland pathological conditions is nitric oxide (NO). Inducible nitric oxide synthase expression is increased in thyroiditis cases and even more in thyroid carcinoma cases, directly connected with increased NO levels in both pathological conditions. We hypothesize that the basal levels of nitrite/nitrate in serum and biopsy washout could indicate nodules' malignant nature.
T2  - Medical Hypotheses
T1  - Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?
VL  - 150
SP  - 110569
DO  - 10.1016/j.mehy.2021.110569
ER  - 
@article{
author = "Samardžić, Vladimir and Banjac, Katarina and Obradović, Milan and Gluvić, Zoran and Isenović, Esma R.",
year = "2021",
abstract = "Thyroid nodules are among highly prevalent thyroid diseases. To make a distinction between benign and malignant thyroid nodules are of cumbersome significance for each endocrinologist. There is no unique and completely accurate diagnostic test, method, or even biomarker that points to a malignant thyroid nodule. Many studies in modern thyroidology are conducted to determine the usefulness of individual biomarkers, which could help clinicians detect thyroid nodules' potential malignant nature. One interesting biomarker with a promising diagnostic potential for the thyroid gland pathological conditions is nitric oxide (NO). Inducible nitric oxide synthase expression is increased in thyroiditis cases and even more in thyroid carcinoma cases, directly connected with increased NO levels in both pathological conditions. We hypothesize that the basal levels of nitrite/nitrate in serum and biopsy washout could indicate nodules' malignant nature.",
journal = "Medical Hypotheses",
title = "Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?",
volume = "150",
pages = "110569",
doi = "10.1016/j.mehy.2021.110569"
}
Samardžić, V., Banjac, K., Obradović, M., Gluvić, Z.,& Isenović, E. R.. (2021). Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?. in Medical Hypotheses, 150, 110569.
https://doi.org/10.1016/j.mehy.2021.110569
Samardžić V, Banjac K, Obradović M, Gluvić Z, Isenović ER. Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?. in Medical Hypotheses. 2021;150:110569.
doi:10.1016/j.mehy.2021.110569 .
Samardžić, Vladimir, Banjac, Katarina, Obradović, Milan, Gluvić, Zoran, Isenović, Esma R., "Could the level of nitrite/nitrate contribute to malignant thyroid nodule diagnostics?" in Medical Hypotheses, 150 (2021):110569,
https://doi.org/10.1016/j.mehy.2021.110569 . .

Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles

Rakočević, Lazar; Srejić, Irina; Maksić, Aleksandar; Golubović, Jelena; Štrbac, Svetlana

(2021)

TY  - JOUR
AU  - Rakočević, Lazar
AU  - Srejić, Irina
AU  - Maksić, Aleksandar
AU  - Golubović, Jelena
AU  - Štrbac, Svetlana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9626
AB  - Hydrogen evolution reaction (HER) was investigated on reduced graphene oxide (rGO)-supported Au and PdAu nanoparticles in acid solution. The graphene spread over glassy carbon (rGO/GC) was used as a support for the spontaneous deposition of Au and Pd. The resulting Au/rGO and PdAu/rGO electrodes were characterized using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) techniques. Phase AFM images have shown that the edges of the rGO sheets were active sites for the deposition of both Au and Pd. XPS analysis revealed that the atomic percentages of both Au and PdAu nanoparticles were slightly higher than 1%. The activity of the PdAu/rGO electrode for the HER was remarkably high, with the overpotential close to zero. HER activity was stable over a 3 h testing time, with a low Tafel slope of approx. −46 mV/dec achieved after prolonged hydrogen evolution at a constant potential.
T2  - Catalysts
T1  - Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles
VL  - 11
IS  - 4
SP  - 481
DO  - 10.3390/catal11040481
ER  - 
@article{
author = "Rakočević, Lazar and Srejić, Irina and Maksić, Aleksandar and Golubović, Jelena and Štrbac, Svetlana",
year = "2021",
abstract = "Hydrogen evolution reaction (HER) was investigated on reduced graphene oxide (rGO)-supported Au and PdAu nanoparticles in acid solution. The graphene spread over glassy carbon (rGO/GC) was used as a support for the spontaneous deposition of Au and Pd. The resulting Au/rGO and PdAu/rGO electrodes were characterized using atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS) techniques. Phase AFM images have shown that the edges of the rGO sheets were active sites for the deposition of both Au and Pd. XPS analysis revealed that the atomic percentages of both Au and PdAu nanoparticles were slightly higher than 1%. The activity of the PdAu/rGO electrode for the HER was remarkably high, with the overpotential close to zero. HER activity was stable over a 3 h testing time, with a low Tafel slope of approx. −46 mV/dec achieved after prolonged hydrogen evolution at a constant potential.",
journal = "Catalysts",
title = "Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles",
volume = "11",
number = "4",
pages = "481",
doi = "10.3390/catal11040481"
}
Rakočević, L., Srejić, I., Maksić, A., Golubović, J.,& Štrbac, S.. (2021). Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles. in Catalysts, 11(4), 481.
https://doi.org/10.3390/catal11040481
Rakočević L, Srejić I, Maksić A, Golubović J, Štrbac S. Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles. in Catalysts. 2021;11(4):481.
doi:10.3390/catal11040481 .
Rakočević, Lazar, Srejić, Irina, Maksić, Aleksandar, Golubović, Jelena, Štrbac, Svetlana, "Hydrogen Evolution on Reduced Graphene Oxide-Supported PdAu Nanoparticles" in Catalysts, 11, no. 4 (2021):481,
https://doi.org/10.3390/catal11040481 . .
1
1

Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations

Toprek, Dragan; Koteski, Vasil J.

(2021)

TY  - JOUR
AU  - Toprek, Dragan
AU  - Koteski, Vasil J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9139
AB  - In this paper we studied the effects of the concentration of W as a doped atom on the V lattice site on the electronic and optical properties of tetragonal zircon-type BiVO4 structure. The calculations were performed by the first-principles density functional theory WIEN2k code. The doping strategy was targeting V atoms substituted by W atoms using the same lattice parameters as pure BiVO4 structure. To avoid the self interaction of impurities, the supercell method was adopted ensuring a sufficient length between the impurities in all directions. For all considered concentrations, the optical properties in the visible light range of λ≥550nm are improved over the undoped BiVO4. © 2021 Elsevier B.V.
T2  - Materials Chemistry and Physics
T1  - Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations
VL  - 264
SP  - 124439
DO  - 10.1016/j.matchemphys.2021.124439
ER  - 
@article{
author = "Toprek, Dragan and Koteski, Vasil J.",
year = "2021",
abstract = "In this paper we studied the effects of the concentration of W as a doped atom on the V lattice site on the electronic and optical properties of tetragonal zircon-type BiVO4 structure. The calculations were performed by the first-principles density functional theory WIEN2k code. The doping strategy was targeting V atoms substituted by W atoms using the same lattice parameters as pure BiVO4 structure. To avoid the self interaction of impurities, the supercell method was adopted ensuring a sufficient length between the impurities in all directions. For all considered concentrations, the optical properties in the visible light range of λ≥550nm are improved over the undoped BiVO4. © 2021 Elsevier B.V.",
journal = "Materials Chemistry and Physics",
title = "Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations",
volume = "264",
pages = "124439",
doi = "10.1016/j.matchemphys.2021.124439"
}
Toprek, D.,& Koteski, V. J.. (2021). Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations. in Materials Chemistry and Physics, 264, 124439.
https://doi.org/10.1016/j.matchemphys.2021.124439
Toprek D, Koteski VJ. Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations. in Materials Chemistry and Physics. 2021;264:124439.
doi:10.1016/j.matchemphys.2021.124439 .
Toprek, Dragan, Koteski, Vasil J., "Improving the photocatalytic activity of tetragonal BiVO4 with zircon-type structure through W doping; Ab initio calculations" in Materials Chemistry and Physics, 264 (2021):124439,
https://doi.org/10.1016/j.matchemphys.2021.124439 . .
1
1

Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study

Dragojlović, Milijana; Milanović, Igor; Gradišek, Anton; Kurko, Sandra V.; Mitrić, Miodrag; Umićević, Ana; Radaković, Jana; Batalović, Katarina

(2021)

TY  - JOUR
AU  - Dragojlović, Milijana
AU  - Milanović, Igor
AU  - Gradišek, Anton
AU  - Kurko, Sandra V.
AU  - Mitrić, Miodrag
AU  - Umićević, Ana
AU  - Radaković, Jana
AU  - Batalović, Katarina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9091
AB  - LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study
VL  - 46
IS  - 24
SP  - 13070
EP  - 13081
DO  - 10.1016/j.ijhydene.2021.01.086
ER  - 
@article{
author = "Dragojlović, Milijana and Milanović, Igor and Gradišek, Anton and Kurko, Sandra V. and Mitrić, Miodrag and Umićević, Ana and Radaković, Jana and Batalović, Katarina",
year = "2021",
abstract = "LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study",
volume = "46",
number = "24",
pages = "13070-13081",
doi = "10.1016/j.ijhydene.2021.01.086"
}
Dragojlović, M., Milanović, I., Gradišek, A., Kurko, S. V., Mitrić, M., Umićević, A., Radaković, J.,& Batalović, K.. (2021). Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy, 46(24), 13070-13081.
https://doi.org/10.1016/j.ijhydene.2021.01.086
Dragojlović M, Milanović I, Gradišek A, Kurko SV, Mitrić M, Umićević A, Radaković J, Batalović K. Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy. 2021;46(24):13070-13081.
doi:10.1016/j.ijhydene.2021.01.086 .
Dragojlović, Milijana, Milanović, Igor, Gradišek, Anton, Kurko, Sandra V., Mitrić, Miodrag, Umićević, Ana, Radaković, Jana, Batalović, Katarina, "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study" in International Journal of Hydrogen Energy, 46, no. 24 (2021):13070-13081,
https://doi.org/10.1016/j.ijhydene.2021.01.086 . .

Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study

Dragojlović, Milijana; Milanović, Igor; Gradišek, Anton; Kurko, Sandra V.; Mitrić, Miodrag; Umićević, Ana; Radaković, Jana; Batalović, Katarina

(2021)

TY  - JOUR
AU  - Dragojlović, Milijana
AU  - Milanović, Igor
AU  - Gradišek, Anton
AU  - Kurko, Sandra V.
AU  - Mitrić, Miodrag
AU  - Umićević, Ana
AU  - Radaković, Jana
AU  - Batalović, Katarina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9087
AB  - LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study
VL  - 46
IS  - 24
SP  - 13070
EP  - 13081
DO  - 10.1016/j.ijhydene.2021.01.086
ER  - 
@article{
author = "Dragojlović, Milijana and Milanović, Igor and Gradišek, Anton and Kurko, Sandra V. and Mitrić, Miodrag and Umićević, Ana and Radaković, Jana and Batalović, Katarina",
year = "2021",
abstract = "LiAlH4 is a promising material for hydrogen storage, having the theoretical gravimetric density of 10.6 wt% H2. In order to decrease the temperature where hydrogen is released, we investigated the catalytic influence of Fe2O3 on LiAlH4 dehydrogenation, as a model case for understanding the effects transition oxide additives have in the catalysis process. Quick mechanochemical synthesis of LiAlH4 + 5 wt% Fe2O3 led to the significant decrease of the hydrogen desorption temperature, and desorption of over 7 wt%H2 in the temperature range 143–154 °C. Density functional theory (DFT)-based calculations with Tran-Blaha modified Becke-Johnson functional (TBmBJ) address the electronic structure of LiAlH4 and Li3AlH6. 57Fe Mössbauer study shows the change in the oxidational state of iron during hydrogen desorption, while the 1H NMR study reveals the presence of paramagnetic species that affect relaxation. The electron transfer from hydrides is discussed as the proposed mechanism of destabilization of LiAlH4 + 5 wt% Fe2O3. © 2021 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study",
volume = "46",
number = "24",
pages = "13070-13081",
doi = "10.1016/j.ijhydene.2021.01.086"
}
Dragojlović, M., Milanović, I., Gradišek, A., Kurko, S. V., Mitrić, M., Umićević, A., Radaković, J.,& Batalović, K.. (2021). Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy, 46(24), 13070-13081.
https://doi.org/10.1016/j.ijhydene.2021.01.086
Dragojlović M, Milanović I, Gradišek A, Kurko SV, Mitrić M, Umićević A, Radaković J, Batalović K. Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study. in International Journal of Hydrogen Energy. 2021;46(24):13070-13081.
doi:10.1016/j.ijhydene.2021.01.086 .
Dragojlović, Milijana, Milanović, Igor, Gradišek, Anton, Kurko, Sandra V., Mitrić, Miodrag, Umićević, Ana, Radaković, Jana, Batalović, Katarina, "Mechanochemical modification of LiAlH4 with Fe2O3 - A combined DFT and experimental study" in International Journal of Hydrogen Energy, 46, no. 24 (2021):13070-13081,
https://doi.org/10.1016/j.ijhydene.2021.01.086 . .

Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods

Popov, Nina; Bošković, Marko; Perović, Marija M.; Németh, Zoltán; Wang, Junhu; Kuang, Zhichong; Reissner, Michael; Kuzmann, Ernő; Homonnay, Zoltán; Kubuki, Shiro; Marciuš, Marijan; Ristić, Mira; Musić, Svetozar; Stanković, Dalibor M.; Krehula, Stjepko

(2021)

TY  - JOUR
AU  - Popov, Nina
AU  - Bošković, Marko
AU  - Perović, Marija M.
AU  - Németh, Zoltán
AU  - Wang, Junhu
AU  - Kuang, Zhichong
AU  - Reissner, Michael
AU  - Kuzmann, Ernő
AU  - Homonnay, Zoltán
AU  - Kubuki, Shiro
AU  - Marciuš, Marijan
AU  - Ristić, Mira
AU  - Musić, Svetozar
AU  - Stanković, Dalibor M.
AU  - Krehula, Stjepko
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9516
AB  - Pure hematite nanorods and very long and thin cobalt-doped hematite nanorods (nanoneedles) were prepared by a combined precipitation and annealing method. The influence of the level of cobalt doping on different properties of hematite nanorods was investigated. Incorporation of cobalt in the form of low-spin Co3+ ions into the structure of hematite by substitution for high-spin Fe3+ ions was proved by determination of a significant unit cell contraction by powder X-ray diffraction (PXRD) and characteristic positions of the absorption edge in X-ray absorption near edge structure (XANES) spectra and peaks in X-ray emission (XES) spectra. Cobalt doping caused a gradual elongation and thinning of hematite nanorods – very long and thin 1D nanoparticles (nanoneedles) were formed in the presence of 10 and 12 mol% Co. Magnetic measurements showed a strong increase in low-temperature remanent magnetization and coercivity upon cobalt doping, as well as a disappearance of the Morin transition, which was also confirmed by Mössbauer spectroscopy. Cobalt doping significantly affected optical properties of hematite nanorods – absorption in the visible and NIR ranges increased, which was accompanied by narrowing of the optical band gap. Compared with pure hematite nanorods cobalt-doped hematite nanoneedles showed a significantly better electrocatalytic activity for the oxygen evolution reaction (OER). © 2020 Elsevier Ltd
T2  - Journal of Physics and Chemistry of Solids
T1  - Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods
VL  - 152
SP  - 109929
DO  - 10.1016/j.jpcs.2020.109929
ER  - 
@article{
author = "Popov, Nina and Bošković, Marko and Perović, Marija M. and Németh, Zoltán and Wang, Junhu and Kuang, Zhichong and Reissner, Michael and Kuzmann, Ernő and Homonnay, Zoltán and Kubuki, Shiro and Marciuš, Marijan and Ristić, Mira and Musić, Svetozar and Stanković, Dalibor M. and Krehula, Stjepko",
year = "2021",
abstract = "Pure hematite nanorods and very long and thin cobalt-doped hematite nanorods (nanoneedles) were prepared by a combined precipitation and annealing method. The influence of the level of cobalt doping on different properties of hematite nanorods was investigated. Incorporation of cobalt in the form of low-spin Co3+ ions into the structure of hematite by substitution for high-spin Fe3+ ions was proved by determination of a significant unit cell contraction by powder X-ray diffraction (PXRD) and characteristic positions of the absorption edge in X-ray absorption near edge structure (XANES) spectra and peaks in X-ray emission (XES) spectra. Cobalt doping caused a gradual elongation and thinning of hematite nanorods – very long and thin 1D nanoparticles (nanoneedles) were formed in the presence of 10 and 12 mol% Co. Magnetic measurements showed a strong increase in low-temperature remanent magnetization and coercivity upon cobalt doping, as well as a disappearance of the Morin transition, which was also confirmed by Mössbauer spectroscopy. Cobalt doping significantly affected optical properties of hematite nanorods – absorption in the visible and NIR ranges increased, which was accompanied by narrowing of the optical band gap. Compared with pure hematite nanorods cobalt-doped hematite nanoneedles showed a significantly better electrocatalytic activity for the oxygen evolution reaction (OER). © 2020 Elsevier Ltd",
journal = "Journal of Physics and Chemistry of Solids",
title = "Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods",
volume = "152",
pages = "109929",
doi = "10.1016/j.jpcs.2020.109929"
}
Popov, N., Bošković, M., Perović, M. M., Németh, Z., Wang, J., Kuang, Z., Reissner, M., Kuzmann, E., Homonnay, Z., Kubuki, S., Marciuš, M., Ristić, M., Musić, S., Stanković, D. M.,& Krehula, S.. (2021). Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods. in Journal of Physics and Chemistry of Solids, 152, 109929.
https://doi.org/10.1016/j.jpcs.2020.109929
Popov N, Bošković M, Perović MM, Németh Z, Wang J, Kuang Z, Reissner M, Kuzmann E, Homonnay Z, Kubuki S, Marciuš M, Ristić M, Musić S, Stanković DM, Krehula S. Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods. in Journal of Physics and Chemistry of Solids. 2021;152:109929.
doi:10.1016/j.jpcs.2020.109929 .
Popov, Nina, Bošković, Marko, Perović, Marija M., Németh, Zoltán, Wang, Junhu, Kuang, Zhichong, Reissner, Michael, Kuzmann, Ernő, Homonnay, Zoltán, Kubuki, Shiro, Marciuš, Marijan, Ristić, Mira, Musić, Svetozar, Stanković, Dalibor M., Krehula, Stjepko, "Influence of low-spin Co3+ for high-spin Fe3+ substitution on the structural, magnetic, optical and catalytic properties of hematite (α-Fe2O3) nanorods" in Journal of Physics and Chemistry of Solids, 152 (2021):109929,
https://doi.org/10.1016/j.jpcs.2020.109929 . .
2
1
1

Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs

Kuveljić, Jovana; Đurić, Tamara; Stanković, Goran; Dekleva, Milica; Stanković, Aleksandra; Alavantić, Dragan; Živković, Maja

(2021)

TY  - JOUR
AU  - Kuveljić, Jovana
AU  - Đurić, Tamara
AU  - Stanković, Goran
AU  - Dekleva, Milica
AU  - Stanković, Aleksandra
AU  - Alavantić, Dragan
AU  - Živković, Maja
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9541
AB  - Background: Myocardial infarction (MI) and underlining atherosclerosis are the main causes of death worldwide. Phosphatase and actin regulator 1 (PHACTR1) variants have been associated with early onset MI, coronary artery disease and carotid dissection. PHACTR1 mRNA expression has been detected in tissues and cells related to atherosclerosis. Nonetheless, the true effect of PHACTR1 on vascular diseases is still unknown. Our aim was to examine the association of PHACTR1 intronic variants, rs9349379, rs2026458 and rs2876300, with MI and multi-vessel disease (MVD) and to assess their effect on PHACTR1 and EDN1 mRNA expression in PBMCs of patients six months after MI. Methods: The study enrolled 537 patients with the first MI and 310 controls. Gene expression was assessed in 74 patients six months after MI and 37 healthy controls. Rs9349379, rs2026458, rs2876300 and relative mRNA expressions were detected by TaqMan® technology. Results: The significant association between PHACTR1 variants and MI was not found, either individually or in haplotype. A higher frequency of rs2876300G-allele in MVD was rendered not significant after Bonferroni correction. PHACTR1 mRNA was significantly increased in PBMCs of patients six months after MI compared to controls (p = 0.02). Patients that carry ACG haplotype have increased PHACTR1 mRNA expression in PBMCs (p = 0.04). There was no effect of PHACTR1 variants on EDN1 mRNA expression. Conclusion: Our findings suggest that PHACTR1 intronic variants may have a role in severity and progression of coronary atherosclerosis. Future research is needed to clarify the mechanism underlying the role of PHACTR1 in coronary atherosclerosis and MI. © 2021 Elsevier B.V.
T2  - Gene
T1  - Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs
VL  - 775
SP  - 145428
DO  - 10.1016/j.gene.2021.145428
ER  - 
@article{
author = "Kuveljić, Jovana and Đurić, Tamara and Stanković, Goran and Dekleva, Milica and Stanković, Aleksandra and Alavantić, Dragan and Živković, Maja",
year = "2021",
abstract = "Background: Myocardial infarction (MI) and underlining atherosclerosis are the main causes of death worldwide. Phosphatase and actin regulator 1 (PHACTR1) variants have been associated with early onset MI, coronary artery disease and carotid dissection. PHACTR1 mRNA expression has been detected in tissues and cells related to atherosclerosis. Nonetheless, the true effect of PHACTR1 on vascular diseases is still unknown. Our aim was to examine the association of PHACTR1 intronic variants, rs9349379, rs2026458 and rs2876300, with MI and multi-vessel disease (MVD) and to assess their effect on PHACTR1 and EDN1 mRNA expression in PBMCs of patients six months after MI. Methods: The study enrolled 537 patients with the first MI and 310 controls. Gene expression was assessed in 74 patients six months after MI and 37 healthy controls. Rs9349379, rs2026458, rs2876300 and relative mRNA expressions were detected by TaqMan® technology. Results: The significant association between PHACTR1 variants and MI was not found, either individually or in haplotype. A higher frequency of rs2876300G-allele in MVD was rendered not significant after Bonferroni correction. PHACTR1 mRNA was significantly increased in PBMCs of patients six months after MI compared to controls (p = 0.02). Patients that carry ACG haplotype have increased PHACTR1 mRNA expression in PBMCs (p = 0.04). There was no effect of PHACTR1 variants on EDN1 mRNA expression. Conclusion: Our findings suggest that PHACTR1 intronic variants may have a role in severity and progression of coronary atherosclerosis. Future research is needed to clarify the mechanism underlying the role of PHACTR1 in coronary atherosclerosis and MI. © 2021 Elsevier B.V.",
journal = "Gene",
title = "Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs",
volume = "775",
pages = "145428",
doi = "10.1016/j.gene.2021.145428"
}
Kuveljić, J., Đurić, T., Stanković, G., Dekleva, M., Stanković, A., Alavantić, D.,& Živković, M.. (2021). Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs. in Gene, 775, 145428.
https://doi.org/10.1016/j.gene.2021.145428
Kuveljić J, Đurić T, Stanković G, Dekleva M, Stanković A, Alavantić D, Živković M. Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs. in Gene. 2021;775:145428.
doi:10.1016/j.gene.2021.145428 .
Kuveljić, Jovana, Đurić, Tamara, Stanković, Goran, Dekleva, Milica, Stanković, Aleksandra, Alavantić, Dragan, Živković, Maja, "Association of PHACTR1 intronic variants with the first myocardial infarction and their effect on PHACTR1 mRNA expression in PBMCs" in Gene, 775 (2021):145428,
https://doi.org/10.1016/j.gene.2021.145428 . .

Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites

Babić-Stojić, Branka; Branković, Dušan; Milivojević, Dušan; Jagličić, Zvonko

(2021)

TY  - JOUR
AU  - Babić-Stojić, Branka
AU  - Branković, Dušan
AU  - Milivojević, Dušan
AU  - Jagličić, Zvonko
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9646
AB  - Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 nanoparticles (NPs) with y = 0.93, 1.20 and 1.34 dispersed in an amorphous SiO2 matrix were prepared by a sol-gel method. The average crystallite size DXRD of about 25 nm determined by X-ray diffraction (XRD) agrees well with the average particle size observed in transmission electron microscopy (TEM). Dynamic magnetic susceptibility measurements indicate a spin-glass-like behavior of the nanoparticles below the spin-glass (SG) transition temperature TC < 10 K. Field dependent magnetization exhibits weak ferromagnetism and shift of the magnetic hysteresis loop. On the basis of the observed magnetic properties, we propose a model of the core-shell structure of the Co1+yAl2-yO4 nanoparticles with the spin-glass phase in the core and weak ferromagnetism in the shell. The exchange bias field disappears above the spin-glass transition temperature TC, whereas the weak ferromagnetism persists also at temperatures above TC. The component of weak ferromagnetism is associated with the presence of Co vacancies in the nanoparticle spinel crystal lattice.
T2  - Journal of Alloys and Compounds
T1  - Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites
VL  - 853
SP  - 155933
DO  - 10.1016/j.jallcom.2020.155933
ER  - 
@article{
author = "Babić-Stojić, Branka and Branković, Dušan and Milivojević, Dušan and Jagličić, Zvonko",
year = "2021",
abstract = "Nanocomposites made of magnetic spinel oxide Co1+yAl2-yO4 nanoparticles (NPs) with y = 0.93, 1.20 and 1.34 dispersed in an amorphous SiO2 matrix were prepared by a sol-gel method. The average crystallite size DXRD of about 25 nm determined by X-ray diffraction (XRD) agrees well with the average particle size observed in transmission electron microscopy (TEM). Dynamic magnetic susceptibility measurements indicate a spin-glass-like behavior of the nanoparticles below the spin-glass (SG) transition temperature TC < 10 K. Field dependent magnetization exhibits weak ferromagnetism and shift of the magnetic hysteresis loop. On the basis of the observed magnetic properties, we propose a model of the core-shell structure of the Co1+yAl2-yO4 nanoparticles with the spin-glass phase in the core and weak ferromagnetism in the shell. The exchange bias field disappears above the spin-glass transition temperature TC, whereas the weak ferromagnetism persists also at temperatures above TC. The component of weak ferromagnetism is associated with the presence of Co vacancies in the nanoparticle spinel crystal lattice.",
journal = "Journal of Alloys and Compounds",
title = "Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites",
volume = "853",
pages = "155933",
doi = "10.1016/j.jallcom.2020.155933"
}
Babić-Stojić, B., Branković, D., Milivojević, D.,& Jagličić, Z.. (2021). Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites. in Journal of Alloys and Compounds, 853, 155933.
https://doi.org/10.1016/j.jallcom.2020.155933
Babić-Stojić B, Branković D, Milivojević D, Jagličić Z. Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites. in Journal of Alloys and Compounds. 2021;853:155933.
doi:10.1016/j.jallcom.2020.155933 .
Babić-Stojić, Branka, Branković, Dušan, Milivojević, Dušan, Jagličić, Zvonko, "Weak ferromagnetism and exchange bias effect in Co1+yAl2-yO4/SiO2 nanocomposites" in Journal of Alloys and Compounds, 853 (2021):155933,
https://doi.org/10.1016/j.jallcom.2020.155933 . .

Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study

Rakočević, Lazar; Štrbac, Svetlana; Srejić, Irina

(2021)

TY  - JOUR
AU  - Rakočević, Lazar
AU  - Štrbac, Svetlana
AU  - Srejić, Irina
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9544
AB  - HER was examined on various glassy carbon-supported Au and PdAu electrodes in acid solution. The Au/GC electrodes were obtained after Au was electrodeposited on a GC substrate by holding the potential for various times in 0.5 M H2SO4 solution containing AuCl4− ions. PdAu/GC electrodes were obtained after Pd has been added by a spontaneous deposition on previously prepared Au/GC electrodes. Surface morphology and chemical analysis of Au/GC and PdAu/GC electrodes were performed by atomic force microscopy and X-ray photoemission spectroscopy. Electrochemical characterization was performed by cyclic voltammetry in 0.5 M H2SO4 solution, while the linear sweep voltammetry was used to gain insight into the electrocatalytic activity of these electrodes for HER. 30minPd/10minAu/GC electrode consisting of 48% Pd and 65% Au, with the total coverage of the GC substrate with PdAu islands of 70%, showed the best catalytic activity for HER. A remarkable high activity and stability of this electrode makes it a promising catalyst for HER in acid solution. © 2021 Hydrogen Energy Publications LLC
T2  - International Journal of Hydrogen Energy
T1  - Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study
VL  - 46
IS  - 13
SP  - 9052
EP  - 9063
DO  - 10.1016/j.ijhydene.2021.01.001
ER  - 
@article{
author = "Rakočević, Lazar and Štrbac, Svetlana and Srejić, Irina",
year = "2021",
abstract = "HER was examined on various glassy carbon-supported Au and PdAu electrodes in acid solution. The Au/GC electrodes were obtained after Au was electrodeposited on a GC substrate by holding the potential for various times in 0.5 M H2SO4 solution containing AuCl4− ions. PdAu/GC electrodes were obtained after Pd has been added by a spontaneous deposition on previously prepared Au/GC electrodes. Surface morphology and chemical analysis of Au/GC and PdAu/GC electrodes were performed by atomic force microscopy and X-ray photoemission spectroscopy. Electrochemical characterization was performed by cyclic voltammetry in 0.5 M H2SO4 solution, while the linear sweep voltammetry was used to gain insight into the electrocatalytic activity of these electrodes for HER. 30minPd/10minAu/GC electrode consisting of 48% Pd and 65% Au, with the total coverage of the GC substrate with PdAu islands of 70%, showed the best catalytic activity for HER. A remarkable high activity and stability of this electrode makes it a promising catalyst for HER in acid solution. © 2021 Hydrogen Energy Publications LLC",
journal = "International Journal of Hydrogen Energy",
title = "Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study",
volume = "46",
number = "13",
pages = "9052-9063",
doi = "10.1016/j.ijhydene.2021.01.001"
}
Rakočević, L., Štrbac, S.,& Srejić, I.. (2021). Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study. in International Journal of Hydrogen Energy, 46(13), 9052-9063.
https://doi.org/10.1016/j.ijhydene.2021.01.001
Rakočević L, Štrbac S, Srejić I. Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study. in International Journal of Hydrogen Energy. 2021;46(13):9052-9063.
doi:10.1016/j.ijhydene.2021.01.001 .
Rakočević, Lazar, Štrbac, Svetlana, Srejić, Irina, "Hydrogen evolution on Au/GC and PdAu/GC nanostructures in acid solution: AFM, XPS, and electrochemical study" in International Journal of Hydrogen Energy, 46, no. 13 (2021):9052-9063,
https://doi.org/10.1016/j.ijhydene.2021.01.001 . .
4
4
5

Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion

Jovanović, Rastko D.; Marek, Ewa J.

(2021)

TY  - JOUR
AU  - Jovanović, Rastko D.
AU  - Marek, Ewa J.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9618
AB  - The study presents a new modelling approach applied to hematite to magnetite reduction, which is the dominant reaction in atmospheres with a high CO2/CO ratio, expected in chemical looping combustion. The structure of the Fe2O3 particle was simulated using the percolation theory, while the reduction was modelled using the stochastic approach to simulate nucleation, gaseous diffusion, solid-state diffusion, and chemical reaction. To account for differences between 3-D and 2-D pores, the model allowed for pore-hopping. The obtained results agreed with experimental results for Fe2O3 derived from natural ore (pyrite), and, to a lesser extent, with results for lab-synthesised Fe2O3 particles. The model provides useful insight into the complexity of the investigated process. For materials with undeveloped porosity, a simple shrinking-core approximation will be sufficient. In contrast, for materials with well-developed porosity, the models should incorporate information about the particle structure. © 2020 Elsevier B.V.
T2  - Chemical Engineering Journal
T1  - Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion
VL  - 406
DO  - 10.1016/j.cej.2020.126845
ER  - 
@article{
author = "Jovanović, Rastko D. and Marek, Ewa J.",
year = "2021",
abstract = "The study presents a new modelling approach applied to hematite to magnetite reduction, which is the dominant reaction in atmospheres with a high CO2/CO ratio, expected in chemical looping combustion. The structure of the Fe2O3 particle was simulated using the percolation theory, while the reduction was modelled using the stochastic approach to simulate nucleation, gaseous diffusion, solid-state diffusion, and chemical reaction. To account for differences between 3-D and 2-D pores, the model allowed for pore-hopping. The obtained results agreed with experimental results for Fe2O3 derived from natural ore (pyrite), and, to a lesser extent, with results for lab-synthesised Fe2O3 particles. The model provides useful insight into the complexity of the investigated process. For materials with undeveloped porosity, a simple shrinking-core approximation will be sufficient. In contrast, for materials with well-developed porosity, the models should incorporate information about the particle structure. © 2020 Elsevier B.V.",
journal = "Chemical Engineering Journal",
title = "Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion",
volume = "406",
doi = "10.1016/j.cej.2020.126845"
}
Jovanović, R. D.,& Marek, E. J.. (2021). Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion. in Chemical Engineering Journal, 406.
https://doi.org/10.1016/j.cej.2020.126845
Jovanović RD, Marek EJ. Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion. in Chemical Engineering Journal. 2021;406.
doi:10.1016/j.cej.2020.126845 .
Jovanović, Rastko D., Marek, Ewa J., "Percolation theory applied in modelling of Fe2O3 reduction during chemical looping combustion" in Chemical Engineering Journal, 406 (2021),
https://doi.org/10.1016/j.cej.2020.126845 . .

Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia)

Davidović, Miloš D.; Dmitrašinović, Sonja; Jovanović, Maja; Radonić, Jelena; Jovašević-Stojanović, Milena

(2021)

TY  - JOUR
AU  - Davidović, Miloš D.
AU  - Dmitrašinović, Sonja
AU  - Jovanović, Maja
AU  - Radonić, Jelena
AU  - Jovašević-Stojanović, Milena
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9553
AB  - Changes in air pollution in the region of the city of Novi Sad due to the COVID-19 induced state of emergency were evaluated while using data from permanently operating air quality monitoring stations belonging to the national, regional, and local networks, as well as ad hoc deployed low-cost particulate matter (PM) sensors. The low-cost sensors were collocated with reference gravimetric pumps. The starting idea for this research was to determine if and to what extent a massive change of anthropogenic activities introduced by lockdown could be observed in main air pollutants levels. An analysis of the data showed that fine and coarse particulate matter, as well as SO2 levels, did not change noticeably, compared to the pre-lockdown period. Isolated larger peaks in PM pollution were traced back to the Aralkum Desert episode. The reduced movement of vehicles and reduced industrial and construction activities during the lockdown in Novi Sad led to a reduction and a more uniform profile of the PM2.5 levels during the period between morning and afternoon air pollution peak, approximately during typical working hours. Daily profiles of NO2, NO, and NOX during the state of emergency proved lower levels during most hours of the day, due to restrictions on vehicular movement. CO during the state of the emergency mainly exhibited a lower level during night. Pollutants having transportation-dominated source profiles exhibited a decrease in level, while pollutants with domestic heating source profiles mostly exhibited a constant level. Considering local sources in Novi Sad, slight to moderate air quality improvement was observed after the lockdown as compared with days before. Furthermore, PM low-cost sensors’ usefulness in air quality assessment was confirmed, as they increase spatial resolution, but it is necessary to calibrate them at the deployment location.
T2  - Applied Sciences
T1  - Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia)
VL  - 11
IS  - 3
SP  - 1212
DO  - 10.3390/app11031212
ER  - 
@article{
author = "Davidović, Miloš D. and Dmitrašinović, Sonja and Jovanović, Maja and Radonić, Jelena and Jovašević-Stojanović, Milena",
year = "2021",
abstract = "Changes in air pollution in the region of the city of Novi Sad due to the COVID-19 induced state of emergency were evaluated while using data from permanently operating air quality monitoring stations belonging to the national, regional, and local networks, as well as ad hoc deployed low-cost particulate matter (PM) sensors. The low-cost sensors were collocated with reference gravimetric pumps. The starting idea for this research was to determine if and to what extent a massive change of anthropogenic activities introduced by lockdown could be observed in main air pollutants levels. An analysis of the data showed that fine and coarse particulate matter, as well as SO2 levels, did not change noticeably, compared to the pre-lockdown period. Isolated larger peaks in PM pollution were traced back to the Aralkum Desert episode. The reduced movement of vehicles and reduced industrial and construction activities during the lockdown in Novi Sad led to a reduction and a more uniform profile of the PM2.5 levels during the period between morning and afternoon air pollution peak, approximately during typical working hours. Daily profiles of NO2, NO, and NOX during the state of emergency proved lower levels during most hours of the day, due to restrictions on vehicular movement. CO during the state of the emergency mainly exhibited a lower level during night. Pollutants having transportation-dominated source profiles exhibited a decrease in level, while pollutants with domestic heating source profiles mostly exhibited a constant level. Considering local sources in Novi Sad, slight to moderate air quality improvement was observed after the lockdown as compared with days before. Furthermore, PM low-cost sensors’ usefulness in air quality assessment was confirmed, as they increase spatial resolution, but it is necessary to calibrate them at the deployment location.",
journal = "Applied Sciences",
title = "Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia)",
volume = "11",
number = "3",
pages = "1212",
doi = "10.3390/app11031212"
}
Davidović, M. D., Dmitrašinović, S., Jovanović, M., Radonić, J.,& Jovašević-Stojanović, M.. (2021). Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia). in Applied Sciences, 11(3), 1212.
https://doi.org/10.3390/app11031212
Davidović MD, Dmitrašinović S, Jovanović M, Radonić J, Jovašević-Stojanović M. Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia). in Applied Sciences. 2021;11(3):1212.
doi:10.3390/app11031212 .
Davidović, Miloš D., Dmitrašinović, Sonja, Jovanović, Maja, Radonić, Jelena, Jovašević-Stojanović, Milena, "Diurnal, Temporal and Spatial Variations of Main Air Pollutants Before and during Emergency Lockdown in the City of Novi Sad (Serbia)" in Applied Sciences, 11, no. 3 (2021):1212,
https://doi.org/10.3390/app11031212 . .
2
2
2

Guiding of protons through radially deformed triple-wall carbon nanotubes

Borka, Duško; Borka Jovanović, Vesna

(2021)

TY  - JOUR
AU  - Borka, Duško
AU  - Borka Jovanović, Vesna
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9570
AB  - Abstract: Subject of this study is a theoretical investigation of the channeling of high energy protons with the radially deformed triple-wall carbon nanotubes (TWNTs). Specifically, we chose a proton energy of 1 GeV and perfect and the radially deformed TWNTs (15, 0)@(10, 0)@(5, 0) of radial strengths η= 0.1 , 0.2 and 0.3. We presented the channeling potential within the perfect and deformed TWNTs and corresponding spatial and angular distributions of channeled protons. We treated the problem relativistically. We also analyzed the case where proton beams enter nanotube under different incidence angles. We analyzed two cases L= 1 and 5 μm. We also varied the value of incidence angle of proton beam and calculated the efficiency of nanotube channeling. This is the first time that we presented spatial and angular distributions of channeled protons with radially deformed TWNTs with angular effect of proton beam, and also, for the first time we presented their channeling efficiency. Our results show that the spatial and angular distributions depend strongly on the nanotube lengths, incident angle of the proton beam, and on the level of radial deformation of nanotube. Multi-wall nanotubes (MWNTs) are better candidates for realization of ion guiding than single-wall nanotubes (SWNTs) because it is easier to produce them straight. Also, deformation of the nanotube and the incident proton beam under some initial angle with respect to the nanotube axes represent realistic situation. That is why we believe that these results may be useful for production and guiding of nanosized ion beams by nanotubes. Graphic abstract: [Figure not available: see fulltext.] © 2021, The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature.
T2  - The European Physical Journal D
T1  - Guiding of protons through radially deformed triple-wall carbon nanotubes
VL  - 75
IS  - 2
SP  - 50
DO  - 10.1140/epjd/s10053-021-00039-1
ER  - 
@article{
author = "Borka, Duško and Borka Jovanović, Vesna",
year = "2021",
abstract = "Abstract: Subject of this study is a theoretical investigation of the channeling of high energy protons with the radially deformed triple-wall carbon nanotubes (TWNTs). Specifically, we chose a proton energy of 1 GeV and perfect and the radially deformed TWNTs (15, 0)@(10, 0)@(5, 0) of radial strengths η= 0.1 , 0.2 and 0.3. We presented the channeling potential within the perfect and deformed TWNTs and corresponding spatial and angular distributions of channeled protons. We treated the problem relativistically. We also analyzed the case where proton beams enter nanotube under different incidence angles. We analyzed two cases L= 1 and 5 μm. We also varied the value of incidence angle of proton beam and calculated the efficiency of nanotube channeling. This is the first time that we presented spatial and angular distributions of channeled protons with radially deformed TWNTs with angular effect of proton beam, and also, for the first time we presented their channeling efficiency. Our results show that the spatial and angular distributions depend strongly on the nanotube lengths, incident angle of the proton beam, and on the level of radial deformation of nanotube. Multi-wall nanotubes (MWNTs) are better candidates for realization of ion guiding than single-wall nanotubes (SWNTs) because it is easier to produce them straight. Also, deformation of the nanotube and the incident proton beam under some initial angle with respect to the nanotube axes represent realistic situation. That is why we believe that these results may be useful for production and guiding of nanosized ion beams by nanotubes. Graphic abstract: [Figure not available: see fulltext.] © 2021, The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature.",
journal = "The European Physical Journal D",
title = "Guiding of protons through radially deformed triple-wall carbon nanotubes",
volume = "75",
number = "2",
pages = "50",
doi = "10.1140/epjd/s10053-021-00039-1"
}
Borka, D.,& Borka Jovanović, V.. (2021). Guiding of protons through radially deformed triple-wall carbon nanotubes. in The European Physical Journal D, 75(2), 50.
https://doi.org/10.1140/epjd/s10053-021-00039-1
Borka D, Borka Jovanović V. Guiding of protons through radially deformed triple-wall carbon nanotubes. in The European Physical Journal D. 2021;75(2):50.
doi:10.1140/epjd/s10053-021-00039-1 .
Borka, Duško, Borka Jovanović, Vesna, "Guiding of protons through radially deformed triple-wall carbon nanotubes" in The European Physical Journal D, 75, no. 2 (2021):50,
https://doi.org/10.1140/epjd/s10053-021-00039-1 . .
1

Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry

Vukanac, Ivana; Đurašević, Mirjana M.; Krneta-Nikolić, Jelena D.; Pantelić, Gordana K.; Rajačić, Milica; Janković, Marija M.; Sarap, Nataša; Todorović, Dragana

(2021)

TY  - JOUR
AU  - Vukanac, Ivana
AU  - Đurašević, Mirjana M.
AU  - Krneta-Nikolić, Jelena D.
AU  - Pantelić, Gordana K.
AU  - Rajačić, Milica
AU  - Janković, Marija M.
AU  - Sarap, Nataša
AU  - Todorović, Dragana
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9136
AB  - The procedure of radioactive standards preparation by spiking selected matrices with a certified mixture of radionuclides and its validation is presented in this paper. The uncertainty budget of standard total activity was elaborated in details. The experimentally obtained efficiency curves, as well as comparison with the curves obtained by the efficiency transfer, are presented. Additionally, in order to confirm claimed homogeneity of prepared standard bulk materials, the efficiency versus density dependence for the individual gamma ray energies was checked for the same geometries and the results are presented. The results of the participation in recent IAEA PT scheme are discussed also. © 2021 Elsevier Ltd
T2  - Radiation Physics and Chemistry
T1  - Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry
VL  - 183
SP  - 109407
DO  - 10.1016/j.radphyschem.2021.109407
ER  - 
@article{
author = "Vukanac, Ivana and Đurašević, Mirjana M. and Krneta-Nikolić, Jelena D. and Pantelić, Gordana K. and Rajačić, Milica and Janković, Marija M. and Sarap, Nataša and Todorović, Dragana",
year = "2021",
abstract = "The procedure of radioactive standards preparation by spiking selected matrices with a certified mixture of radionuclides and its validation is presented in this paper. The uncertainty budget of standard total activity was elaborated in details. The experimentally obtained efficiency curves, as well as comparison with the curves obtained by the efficiency transfer, are presented. Additionally, in order to confirm claimed homogeneity of prepared standard bulk materials, the efficiency versus density dependence for the individual gamma ray energies was checked for the same geometries and the results are presented. The results of the participation in recent IAEA PT scheme are discussed also. © 2021 Elsevier Ltd",
journal = "Radiation Physics and Chemistry",
title = "Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry",
volume = "183",
pages = "109407",
doi = "10.1016/j.radphyschem.2021.109407"
}
Vukanac, I., Đurašević, M. M., Krneta-Nikolić, J. D., Pantelić, G. K., Rajačić, M., Janković, M. M., Sarap, N.,& Todorović, D.. (2021). Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry. in Radiation Physics and Chemistry, 183, 109407.
https://doi.org/10.1016/j.radphyschem.2021.109407
Vukanac I, Đurašević MM, Krneta-Nikolić JD, Pantelić GK, Rajačić M, Janković MM, Sarap N, Todorović D. Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry. in Radiation Physics and Chemistry. 2021;183:109407.
doi:10.1016/j.radphyschem.2021.109407 .
Vukanac, Ivana, Đurašević, Mirjana M., Krneta-Nikolić, Jelena D., Pantelić, Gordana K., Rajačić, Milica, Janković, Marija M., Sarap, Nataša, Todorović, Dragana, "Preparation and validation of laboratory radioactive standards for experimental calibration in gamma ray spectrometry" in Radiation Physics and Chemistry, 183 (2021):109407,
https://doi.org/10.1016/j.radphyschem.2021.109407 . .

Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence

Ćirić, Aleksandar; Stojadinović, Stevan; Ristić, Zoran; Zeković, Ivana Lj.; Kuzman, Sanja; Antić, Željka; Dramićanin, Miroslav

(2021)

TY  - JOUR
AU  - Ćirić, Aleksandar
AU  - Stojadinović, Stevan
AU  - Ristić, Zoran
AU  - Zeković, Ivana Lj.
AU  - Kuzman, Sanja
AU  - Antić, Željka
AU  - Dramićanin, Miroslav
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9140
AB  - The introduction of additional functionalities to materials is exceptionally important as it opens new applications for them. Aluminum, one of the most abundant and important materials, is coated with luminescent Sm2+-doped γ-aluminium oxide to impart thermometric functionality. Considering the potential industrial applications, two of the most widely used aluminum alloys, 6061 and 7075, are also coated. For this purpose, plasma electrolytic oxidation (PEO), an effective technique for producing hard ceramic coatings on various metal surfaces, is used. It is shown that thermometric coatings can be produced on aluminum in one-step process by adding the raw precursor to the electrolyte. The valence reduction of Ln3+ to Ln2+ is achieved during the PEO process. The intense and broad (orange to deep red) emission from the coating shows supersensitivity to temperature changes over the 100–648 K range. The temperature is obtained from the coating emission using i) the emission intensity ratio method, ii) emission lifetime, and iii) emission band position with sensitivities of 4.8% K−1, 1.2% K−1, and 8 cm−1 K−1, respectively. Several applications would benefit from the thermometric coating's excellent temperature resolution of 0.04 K and the choice of three temperature read-outs that facilitate the coating's use in different luminescence thermometry setups. © 2021 Wiley-VCH GmbH
T2  - Advanced Materials Technologies
T1  - Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence
VL  - 6
IS  - 4
SP  - 2001201
DO  - 10.1002/admt.202001201
ER  - 
@article{
author = "Ćirić, Aleksandar and Stojadinović, Stevan and Ristić, Zoran and Zeković, Ivana Lj. and Kuzman, Sanja and Antić, Željka and Dramićanin, Miroslav",
year = "2021",
abstract = "The introduction of additional functionalities to materials is exceptionally important as it opens new applications for them. Aluminum, one of the most abundant and important materials, is coated with luminescent Sm2+-doped γ-aluminium oxide to impart thermometric functionality. Considering the potential industrial applications, two of the most widely used aluminum alloys, 6061 and 7075, are also coated. For this purpose, plasma electrolytic oxidation (PEO), an effective technique for producing hard ceramic coatings on various metal surfaces, is used. It is shown that thermometric coatings can be produced on aluminum in one-step process by adding the raw precursor to the electrolyte. The valence reduction of Ln3+ to Ln2+ is achieved during the PEO process. The intense and broad (orange to deep red) emission from the coating shows supersensitivity to temperature changes over the 100–648 K range. The temperature is obtained from the coating emission using i) the emission intensity ratio method, ii) emission lifetime, and iii) emission band position with sensitivities of 4.8% K−1, 1.2% K−1, and 8 cm−1 K−1, respectively. Several applications would benefit from the thermometric coating's excellent temperature resolution of 0.04 K and the choice of three temperature read-outs that facilitate the coating's use in different luminescence thermometry setups. © 2021 Wiley-VCH GmbH",
journal = "Advanced Materials Technologies",
title = "Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence",
volume = "6",
number = "4",
pages = "2001201",
doi = "10.1002/admt.202001201"
}
Ćirić, A., Stojadinović, S., Ristić, Z., Zeković, I. Lj., Kuzman, S., Antić, Ž.,& Dramićanin, M.. (2021). Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence. in Advanced Materials Technologies, 6(4), 2001201.
https://doi.org/10.1002/admt.202001201
Ćirić A, Stojadinović S, Ristić Z, Zeković IL, Kuzman S, Antić Ž, Dramićanin M. Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence. in Advanced Materials Technologies. 2021;6(4):2001201.
doi:10.1002/admt.202001201 .
Ćirić, Aleksandar, Stojadinović, Stevan, Ristić, Zoran, Zeković, Ivana Lj., Kuzman, Sanja, Antić, Željka, Dramićanin, Miroslav, "Supersensitive Sm2+ ‐Activated Al2O3 Thermometric Coatings for High‐Resolution Multiple Temperature Read‐Outs from Luminescence" in Advanced Materials Technologies, 6, no. 4 (2021):2001201,
https://doi.org/10.1002/admt.202001201 . .
2
2
3
2

Classical patterns in the quantum rainbow channeling of high energy electrons

Ćosić, Marko; Petrović, Srđan M.; Takabayashi, Yuichi

(2021)

TY  - JOUR
AU  - Ćosić, Marko
AU  - Petrović, Srđan M.
AU  - Takabayashi, Yuichi
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9144
AB  - We are investigating the quantum dynamics of a well-collimated electron beam transmitting through planar channels of the Si crystal. Electron states were represented by wave packets while the electron beam is treated as an ensemble of noninteracting wave packets. We have investigated the relationship between classical caustic pattern and anharmonicity of the potential and analyzed how quantum dynamic depends on the wave packet impact parameter and beam's angular divergence. We found that the extrema of the electron trajectory period, considered as a function of the impact parameter, determine the shape of the caustic pattern. All wave packet probability densities have multiple maxima generated by a self-interference. Their sum, that represents probability density of an ensemble, was found to depends strongly on the beam angular divergence. For small divergence, most peaks of different wave packets are aligned causing wavelike behavior of the ensemble. For moderate angular divergence maxima of some wave packets, are aligned with minima of others, resulting in the emergence of the classical caustic pattern. We have shown and experimentally confirmed that the only indication that the observed caustic pattern is generated by the quantum dynamics is a slight systematic shift of the corresponding caustic maxima. © 2021 American Physical Society.
T2  - Physical Review A
T1  - Classical patterns in the quantum rainbow channeling of high energy electrons
VL  - 103
IS  - 2
SP  - 022818
DO  - 10.1103/PhysRevA.103.022818
ER  - 
@article{
author = "Ćosić, Marko and Petrović, Srđan M. and Takabayashi, Yuichi",
year = "2021",
abstract = "We are investigating the quantum dynamics of a well-collimated electron beam transmitting through planar channels of the Si crystal. Electron states were represented by wave packets while the electron beam is treated as an ensemble of noninteracting wave packets. We have investigated the relationship between classical caustic pattern and anharmonicity of the potential and analyzed how quantum dynamic depends on the wave packet impact parameter and beam's angular divergence. We found that the extrema of the electron trajectory period, considered as a function of the impact parameter, determine the shape of the caustic pattern. All wave packet probability densities have multiple maxima generated by a self-interference. Their sum, that represents probability density of an ensemble, was found to depends strongly on the beam angular divergence. For small divergence, most peaks of different wave packets are aligned causing wavelike behavior of the ensemble. For moderate angular divergence maxima of some wave packets, are aligned with minima of others, resulting in the emergence of the classical caustic pattern. We have shown and experimentally confirmed that the only indication that the observed caustic pattern is generated by the quantum dynamics is a slight systematic shift of the corresponding caustic maxima. © 2021 American Physical Society.",
journal = "Physical Review A",
title = "Classical patterns in the quantum rainbow channeling of high energy electrons",
volume = "103",
number = "2",
pages = "022818",
doi = "10.1103/PhysRevA.103.022818"
}
Ćosić, M., Petrović, S. M.,& Takabayashi, Y.. (2021). Classical patterns in the quantum rainbow channeling of high energy electrons. in Physical Review A, 103(2), 022818.
https://doi.org/10.1103/PhysRevA.103.022818
Ćosić M, Petrović SM, Takabayashi Y. Classical patterns in the quantum rainbow channeling of high energy electrons. in Physical Review A. 2021;103(2):022818.
doi:10.1103/PhysRevA.103.022818 .
Ćosić, Marko, Petrović, Srđan M., Takabayashi, Yuichi, "Classical patterns in the quantum rainbow channeling of high energy electrons" in Physical Review A, 103, no. 2 (2021):022818,
https://doi.org/10.1103/PhysRevA.103.022818 . .

Beam Steering Efficiency in Resonant Reflective Metasurfaces

Isić, Goran; Zografopoulos, Dimitrios C.; Stojanović, Danka; Vasić, Borislav Z.; Belić, Milivoj R.

(IEEE, 2021)

TY  - JOUR
AU  - Isić, Goran
AU  - Zografopoulos, Dimitrios C.
AU  - Stojanović, Danka
AU  - Vasić, Borislav Z.
AU  - Belić, Milivoj R.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9071
AB  - Beam steering is one of the prevailing functions performed by electromagnetic metasurfaces. Its efficiency depends on a large number of physical parameters associated with resonant elements comprising the metasurface and is thus notoriously difficult to optimize. Here we formulate a theoretical model for evaluating the diffraction efficiency of an array of lossy resonant elements whose spectral response is dominated by the coupling between a leaky eigenmode and a single incoming/outgoing channel. We use it to deduce a formula for the maximum attainable diffraction efficiency and the gradient parameter profile for which it is achieved. The optimization procedure is demonstrated on the example of an electrically tunable liquid-crystal terahertz beam steering metasurface. Finally, the proposed model is benchmarked against rigorous metasurface simulations. © 1995-2012 IEEE.
PB  - IEEE
T2  - IEEE Journal of Selected Topics in Quantum Electronics
T1  - Beam Steering Efficiency in Resonant Reflective Metasurfaces
VL  - 27
IS  - 1
SP  - 9130831
DO  - 10.1109/JSTQE.2020.3006368
ER  - 
@article{
author = "Isić, Goran and Zografopoulos, Dimitrios C. and Stojanović, Danka and Vasić, Borislav Z. and Belić, Milivoj R.",
year = "2021",
abstract = "Beam steering is one of the prevailing functions performed by electromagnetic metasurfaces. Its efficiency depends on a large number of physical parameters associated with resonant elements comprising the metasurface and is thus notoriously difficult to optimize. Here we formulate a theoretical model for evaluating the diffraction efficiency of an array of lossy resonant elements whose spectral response is dominated by the coupling between a leaky eigenmode and a single incoming/outgoing channel. We use it to deduce a formula for the maximum attainable diffraction efficiency and the gradient parameter profile for which it is achieved. The optimization procedure is demonstrated on the example of an electrically tunable liquid-crystal terahertz beam steering metasurface. Finally, the proposed model is benchmarked against rigorous metasurface simulations. © 1995-2012 IEEE.",
publisher = "IEEE",
journal = "IEEE Journal of Selected Topics in Quantum Electronics",
title = "Beam Steering Efficiency in Resonant Reflective Metasurfaces",
volume = "27",
number = "1",
pages = "9130831",
doi = "10.1109/JSTQE.2020.3006368"
}
Isić, G., Zografopoulos, D. C., Stojanović, D., Vasić, B. Z.,& Belić, M. R.. (2021). Beam Steering Efficiency in Resonant Reflective Metasurfaces. in IEEE Journal of Selected Topics in Quantum Electronics
IEEE., 27(1), 9130831.
https://doi.org/10.1109/JSTQE.2020.3006368
Isić G, Zografopoulos DC, Stojanović D, Vasić BZ, Belić MR. Beam Steering Efficiency in Resonant Reflective Metasurfaces. in IEEE Journal of Selected Topics in Quantum Electronics. 2021;27(1):9130831.
doi:10.1109/JSTQE.2020.3006368 .
Isić, Goran, Zografopoulos, Dimitrios C., Stojanović, Danka, Vasić, Borislav Z., Belić, Milivoj R., "Beam Steering Efficiency in Resonant Reflective Metasurfaces" in IEEE Journal of Selected Topics in Quantum Electronics, 27, no. 1 (2021):9130831,
https://doi.org/10.1109/JSTQE.2020.3006368 . .
2
2
2

The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method

Nikolić, Violeta N.; Vasić, Milica; Milikić, Jadranka; Mariano, Jose F.M.L.

(2021)

TY  - JOUR
AU  - Nikolić, Violeta N.
AU  - Vasić, Milica
AU  - Milikić, Jadranka
AU  - Mariano, Jose F.M.L.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9131
AB  - Abstract: The nanocomposite samples, containing copper and iron species in the silica matrix, were prepared by annealing at temperatures up to 1100°C. The samples were investigated by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and cyclic voltammetry. The results of the performed study depict to the presence of a temperature gradient, which acts on the sample during the annealing treatment in the furnace. For the first time, the influence of the temperature gradient on the formation mechanism of the samples was discussed. © 2021, Pleiades Publishing, Ltd.
T2  - Physics of the Solid State
T1  - The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method
VL  - 63
IS  - 2
SP  - 332
EP  - 354
DO  - 10.1134/S1063783421020207
ER  - 
@article{
author = "Nikolić, Violeta N. and Vasić, Milica and Milikić, Jadranka and Mariano, Jose F.M.L.",
year = "2021",
abstract = "Abstract: The nanocomposite samples, containing copper and iron species in the silica matrix, were prepared by annealing at temperatures up to 1100°C. The samples were investigated by X-ray diffraction analysis, Fourier transform infrared spectroscopy, and cyclic voltammetry. The results of the performed study depict to the presence of a temperature gradient, which acts on the sample during the annealing treatment in the furnace. For the first time, the influence of the temperature gradient on the formation mechanism of the samples was discussed. © 2021, Pleiades Publishing, Ltd.",
journal = "Physics of the Solid State",
title = "The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method",
volume = "63",
number = "2",
pages = "332-354",
doi = "10.1134/S1063783421020207"
}
Nikolić, V. N., Vasić, M., Milikić, J.,& Mariano, J. F.M.L.. (2021). The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method. in Physics of the Solid State, 63(2), 332-354.
https://doi.org/10.1134/S1063783421020207
Nikolić VN, Vasić M, Milikić J, Mariano JF. The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method. in Physics of the Solid State. 2021;63(2):332-354.
doi:10.1134/S1063783421020207 .
Nikolić, Violeta N., Vasić, Milica, Milikić, Jadranka, Mariano, Jose F.M.L., "The Influence of Thermal Treatment on the Formation Mechanism of the Cu, Fe-Containing Nanocomposite Material Synthesized by the Sol–Gel Method" in Physics of the Solid State, 63, no. 2 (2021):332-354,
https://doi.org/10.1134/S1063783421020207 . .

On the long-distance charge transport in DNA-like macromolecules

Čevizović, Dalibor; Chizhov, A.V.; Ivić, Zoran; Reshetnyak, A.A.

(2021)

TY  - JOUR
AU  - Čevizović, Dalibor
AU  - Chizhov, A.V.
AU  - Ivić, Zoran
AU  - Reshetnyak, A.A.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9158
AB  - In this paper, we investigate the possibility of stable migration of charge carriers over long distances in DNA-like macromolecular structures in the form of an adiabatic soliton and derive the conditions for the formation of solitons. We find two types of soliton solutions: symmetric and antisymmetric. Comparing the energy of both types of soliton solutions with the energy of free extra charge, we find the region of the system parameters in which the soliton states are more energetically favorable than the states of quasi-free charges. At the same time, which of the two mentioned soliton solutions corresponds to an energetically favorable state depends on the ratio of the energy parameters of the molecular structure. © 2021, ITMO University. All rights reserved.
T2  - Nanosystems: Physics, Chemistry, Mathematics
T1  - On the long-distance charge transport in DNA-like macromolecules
VL  - 12
IS  - 1
SP  - 32
EP  - 41
DO  - 10.17586/2220-8054-2021-12-1-32-41
ER  - 
@article{
author = "Čevizović, Dalibor and Chizhov, A.V. and Ivić, Zoran and Reshetnyak, A.A.",
year = "2021",
abstract = "In this paper, we investigate the possibility of stable migration of charge carriers over long distances in DNA-like macromolecular structures in the form of an adiabatic soliton and derive the conditions for the formation of solitons. We find two types of soliton solutions: symmetric and antisymmetric. Comparing the energy of both types of soliton solutions with the energy of free extra charge, we find the region of the system parameters in which the soliton states are more energetically favorable than the states of quasi-free charges. At the same time, which of the two mentioned soliton solutions corresponds to an energetically favorable state depends on the ratio of the energy parameters of the molecular structure. © 2021, ITMO University. All rights reserved.",
journal = "Nanosystems: Physics, Chemistry, Mathematics",
title = "On the long-distance charge transport in DNA-like macromolecules",
volume = "12",
number = "1",
pages = "32-41",
doi = "10.17586/2220-8054-2021-12-1-32-41"
}
Čevizović, D., Chizhov, A.V., Ivić, Z.,& Reshetnyak, A.A.. (2021). On the long-distance charge transport in DNA-like macromolecules. in Nanosystems: Physics, Chemistry, Mathematics, 12(1), 32-41.
https://doi.org/10.17586/2220-8054-2021-12-1-32-41
Čevizović D, Chizhov A, Ivić Z, Reshetnyak A. On the long-distance charge transport in DNA-like macromolecules. in Nanosystems: Physics, Chemistry, Mathematics. 2021;12(1):32-41.
doi:10.17586/2220-8054-2021-12-1-32-41 .
Čevizović, Dalibor, Chizhov, A.V., Ivić, Zoran, Reshetnyak, A.A., "On the long-distance charge transport in DNA-like macromolecules" in Nanosystems: Physics, Chemistry, Mathematics, 12, no. 1 (2021):32-41,
https://doi.org/10.17586/2220-8054-2021-12-1-32-41 . .