Todorović, Bratislav Ž.

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  • Todorović, Bratislav Ž. (10)
  • Todorović, Bratislav (2)
Projects

Author's Bibliography

Cell wall response to UV radiation in needles of Picea omorika

Mitrović, Aleksandra Lj.; Simonović-Radosavljević, Jasna; Prokopijević, Miloš; Spasojević, Dragica; Kovačević, Jovana; Prodanović, Olivera; Todorović, Bratislav; Matović, Branko; Stanković, Mira; Maksimović, Vuk; Mutavdžić, Dragosav; Skočić, Miloš; Pešić, Mirjana; Prokić, Ljiljana; Radotić, Ksenija

(2021)

TY  - JOUR
AU  - Mitrović, Aleksandra Lj.
AU  - Simonović-Radosavljević, Jasna
AU  - Prokopijević, Miloš
AU  - Spasojević, Dragica
AU  - Kovačević, Jovana
AU  - Prodanović, Olivera
AU  - Todorović, Bratislav
AU  - Matović, Branko
AU  - Stanković, Mira
AU  - Maksimović, Vuk
AU  - Mutavdžić, Dragosav
AU  - Skočić, Miloš
AU  - Pešić, Mirjana
AU  - Prokić, Ljiljana
AU  - Radotić, Ksenija
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9129
AB  - The UV-B represents the minor fraction of the solar spectrum, while UV-C is not contained in natural solar radiation, but both radiation types can cause damaging effects in plants. Cell walls (CWs) are one of the targets for external stressors. Juvenile P. omorika trees were treated either with 21 day-high doses UV-B or with 7 day- UV-C in open-top chambers. Using spectroscopic and biochemical techniques, it was shown that the response to UV radiation includes numerous modifications in needle CW structure: relative content of xylan, xyloglucan, lignin and cellulose decreased; cellulose crystallinity changed; yield of lignin monomers with stronger connection of C[dbnd]C in side chain with the ring increased; re-distribution of inter- and intra-polymer H-bonds occurred. The recovery was mediated by an increase in the activities and changes in isoform profiles of CW bound covalent peroxidases (POD) and polyphenol oxidases (PO) (UV–B), and ionic POD and covalent PO (UV–C). A connection between activities of specific POD/PO isoforms and phenolic species (m- and p-coumaric acid, pinoresinol and cinnamic acid derivatives) was demonstrated, and supported by changes in the sRNA profile. In vivo fluorometry showed phenolics accumulation in needle epidermal CWs. These results imply transversal connections between polymers and changed mechanical properties of needle CW as a response to UV. The CW alterations enabled maintenance of physiological functions, as indicated by the preserved chlorophyll content and/or organization. The current study provides evidence that in conifers, needle CW response to both UV-B and UV-C includes biochemical modifications and structural remodeling. © 2021 Elsevier Masson SAS
T2  - Plant Physiology and Biochemistry
T1  - Cell wall response to UV radiation in needles of Picea omorika
VL  - 161
SP  - 176
EP  - 190
DO  - 10.1016/j.plaphy.2021.02.007
ER  - 
@article{
author = "Mitrović, Aleksandra Lj. and Simonović-Radosavljević, Jasna and Prokopijević, Miloš and Spasojević, Dragica and Kovačević, Jovana and Prodanović, Olivera and Todorović, Bratislav and Matović, Branko and Stanković, Mira and Maksimović, Vuk and Mutavdžić, Dragosav and Skočić, Miloš and Pešić, Mirjana and Prokić, Ljiljana and Radotić, Ksenija",
year = "2021",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/9129",
abstract = "The UV-B represents the minor fraction of the solar spectrum, while UV-C is not contained in natural solar radiation, but both radiation types can cause damaging effects in plants. Cell walls (CWs) are one of the targets for external stressors. Juvenile P. omorika trees were treated either with 21 day-high doses UV-B or with 7 day- UV-C in open-top chambers. Using spectroscopic and biochemical techniques, it was shown that the response to UV radiation includes numerous modifications in needle CW structure: relative content of xylan, xyloglucan, lignin and cellulose decreased; cellulose crystallinity changed; yield of lignin monomers with stronger connection of C[dbnd]C in side chain with the ring increased; re-distribution of inter- and intra-polymer H-bonds occurred. The recovery was mediated by an increase in the activities and changes in isoform profiles of CW bound covalent peroxidases (POD) and polyphenol oxidases (PO) (UV–B), and ionic POD and covalent PO (UV–C). A connection between activities of specific POD/PO isoforms and phenolic species (m- and p-coumaric acid, pinoresinol and cinnamic acid derivatives) was demonstrated, and supported by changes in the sRNA profile. In vivo fluorometry showed phenolics accumulation in needle epidermal CWs. These results imply transversal connections between polymers and changed mechanical properties of needle CW as a response to UV. The CW alterations enabled maintenance of physiological functions, as indicated by the preserved chlorophyll content and/or organization. The current study provides evidence that in conifers, needle CW response to both UV-B and UV-C includes biochemical modifications and structural remodeling. © 2021 Elsevier Masson SAS",
journal = "Plant Physiology and Biochemistry",
title = "Cell wall response to UV radiation in needles of Picea omorika",
volume = "161",
pages = "176-190",
doi = "10.1016/j.plaphy.2021.02.007"
}
Mitrović, A. Lj., Simonović-Radosavljević, J., Prokopijević, M., Spasojević, D., Kovačević, J., Prodanović, O., Todorović, B., Matović, B., Stanković, M., Maksimović, V., Mutavdžić, D., Skočić, M., Pešić, M., Prokić, L.,& Radotić, K. (2021). Cell wall response to UV radiation in needles of Picea omorika.
Plant Physiology and Biochemistry, 161, 176-190.
https://doi.org/10.1016/j.plaphy.2021.02.007
Mitrović AL, Simonović-Radosavljević J, Prokopijević M, Spasojević D, Kovačević J, Prodanović O, Todorović B, Matović B, Stanković M, Maksimović V, Mutavdžić D, Skočić M, Pešić M, Prokić L, Radotić K. Cell wall response to UV radiation in needles of Picea omorika. Plant Physiology and Biochemistry. 2021;161:176-190
Mitrović Aleksandra Lj., Simonović-Radosavljević Jasna, Prokopijević Miloš, Spasojević Dragica, Kovačević Jovana, Prodanović Olivera, Todorović Bratislav, Matović Branko, Stanković Mira, Maksimović Vuk, Mutavdžić Dragosav, Skočić Miloš, Pešić Mirjana, Prokić Ljiljana, Radotić Ksenija, "Cell wall response to UV radiation in needles of Picea omorika" Plant Physiology and Biochemistry, 161 (2021):176-190,
https://doi.org/10.1016/j.plaphy.2021.02.007 .

Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics

Maletaškić, Jelena; Todorović, Bratislav; Gilić, Martina; Marinović-Cincović, Milena; Yoshida, Katsumi; Gubarevich, Anna; Matović, Branko

(2020)

TY  - JOUR
AU  - Maletaškić, Jelena
AU  - Todorović, Bratislav
AU  - Gilić, Martina
AU  - Marinović-Cincović, Milena
AU  - Yoshida, Katsumi
AU  - Gubarevich, Anna
AU  - Matović, Branko
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8983
AB  - Sphene based glass-ceramics (CaTiSiO5), an excellent candidate for a host lattice of ceramic materials and for nuclear waste immobilization, has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization. Starting powders were melted at 1400?C for 2 h, cooled to room temperature, grounded again, then crystallized by thermal treatment yielding a sphene glass-ceramic. The evolution of the phase composition during thermal treatment was investigated by X-ray powder diffraction (XRPD), FT-IR, Raman and thermal analyses (TG-DTA). Pure synthetic single phase sphene was formed at 800?C for 4 h, even it is very hard to obtain monophase powder at such low temperature. Powder morphology was analyzed by scanning electron microscopy (SEM).
T2  - Science of Sintering
T1  - Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics
VL  - 52
IS  - 1
SP  - 41
EP  - 52
DO  - 10.2298/SOS2001041M
ER  - 
@article{
author = "Maletaškić, Jelena and Todorović, Bratislav and Gilić, Martina and Marinović-Cincović, Milena and Yoshida, Katsumi and Gubarevich, Anna and Matović, Branko",
year = "2020",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/8983",
abstract = "Sphene based glass-ceramics (CaTiSiO5), an excellent candidate for a host lattice of ceramic materials and for nuclear waste immobilization, has been prepared from a powder mixture of CaCO3, TiO2 and SiO2 using vibro-milling for homogenization. Starting powders were melted at 1400?C for 2 h, cooled to room temperature, grounded again, then crystallized by thermal treatment yielding a sphene glass-ceramic. The evolution of the phase composition during thermal treatment was investigated by X-ray powder diffraction (XRPD), FT-IR, Raman and thermal analyses (TG-DTA). Pure synthetic single phase sphene was formed at 800?C for 4 h, even it is very hard to obtain monophase powder at such low temperature. Powder morphology was analyzed by scanning electron microscopy (SEM).",
journal = "Science of Sintering",
title = "Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics",
volume = "52",
number = "1",
pages = "41-52",
doi = "10.2298/SOS2001041M"
}
Maletaškić, J., Todorović, B., Gilić, M., Marinović-Cincović, M., Yoshida, K., Gubarevich, A.,& Matović, B. (2020). Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics.
Science of Sintering, 52(1), 41-52.
https://doi.org/10.2298/SOS2001041M
Maletaškić J, Todorović B, Gilić M, Marinović-Cincović M, Yoshida K, Gubarevich A, Matović B. Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics. Science of Sintering. 2020;52(1):41-52
Maletaškić Jelena, Todorović Bratislav, Gilić Martina, Marinović-Cincović Milena, Yoshida Katsumi, Gubarevich Anna, Matović Branko, "Synthesis and characterization of monophase CaO-TiO2-SiO2 (sphene) based glass-ceramics" Science of Sintering, 52, no. 1 (2020):41-52,
https://doi.org/10.2298/SOS2001041M .

Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)

Kljajević, Ljiljana M.; Melichova, Zuzana; Stojmenović, Marija; Todorović, Bratislav Ž.; Pavlović, Vladimir B.; Čitaković, Nada; Nenadović, Snežana S.

(Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University, 2019)

TY  - JOUR
AU  - Kljajević, Ljiljana M.
AU  - Melichova, Zuzana
AU  - Stojmenović, Marija
AU  - Todorović, Bratislav Ž.
AU  - Pavlović, Vladimir B.
AU  - Čitaković, Nada
AU  - Nenadović, Snežana S.
PY  - 2019
UR  - https://mjcce.org.mk/index.php/MJCCE/article/view/1678
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8828
AB  - Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel, and it is significantly different from the micrographs of the other two geopolymer samples, GPMB and GPMK. A considerable amount of unreacted particles, as well as the presence of pores in the geopolymer matrix of GPMK and GPMD, indicate an incomplete reaction in the system. Aluminosilicate inorganic polymers, geopolymers, are quasi solid electrolytes which possess a high electrical conductivity at room temperature in relation to materials of similar chemical composition. The highest conductivity was found for the sample obtained from GPMK, amounting to 2.14 × 10–2 Ω–1cm–1at 700 ºC. The corresponding activation energies of conductivity for this sample amounted to 0.33 eV in the temperature range of 500–700 ºC. The geopolymer synthesized from metakaolin has good ionic conductivity values, which recommends it for use as an alternative material for an SOFC (Solid Oxide Fuel Cell).
PB  - Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University
T2  - Macedonian Journal of Chemistry and Chemical Engineering
T1  - Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)
VL  - 38
IS  - 2
SP  - 283
EP  - 292
DO  - 10.20450/mjcce.2019.1678
ER  - 
@article{
author = "Kljajević, Ljiljana M. and Melichova, Zuzana and Stojmenović, Marija and Todorović, Bratislav Ž. and Pavlović, Vladimir B. and Čitaković, Nada and Nenadović, Snežana S.",
year = "2019",
url = "https://mjcce.org.mk/index.php/MJCCE/article/view/1678, https://vinar.vin.bg.ac.rs/handle/123456789/8828",
abstract = "Geopolymers (GP) were successfully synthesized from metabentonite (MB), metadiatomite (MD) and metakaolinite (MK). Characterization of their phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. A SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel, and it is significantly different from the micrographs of the other two geopolymer samples, GPMB and GPMK. A considerable amount of unreacted particles, as well as the presence of pores in the geopolymer matrix of GPMK and GPMD, indicate an incomplete reaction in the system. Aluminosilicate inorganic polymers, geopolymers, are quasi solid electrolytes which possess a high electrical conductivity at room temperature in relation to materials of similar chemical composition. The highest conductivity was found for the sample obtained from GPMK, amounting to 2.14 × 10–2 Ω–1cm–1at 700 ºC. The corresponding activation energies of conductivity for this sample amounted to 0.33 eV in the temperature range of 500–700 ºC. The geopolymer synthesized from metakaolin has good ionic conductivity values, which recommends it for use as an alternative material for an SOFC (Solid Oxide Fuel Cell).",
publisher = "Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University",
journal = "Macedonian Journal of Chemistry and Chemical Engineering",
title = "Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)",
volume = "38",
number = "2",
pages = "283-292",
doi = "10.20450/mjcce.2019.1678"
}
Kljajević, L. M., Melichova, Z., Stojmenović, M., Todorović, B. Ž., Pavlović, V. B., Čitaković, N.,& Nenadović, S. S. (2019). Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite).
Macedonian Journal of Chemistry and Chemical Engineering
Skopje : Institute of Chemistry, Faculty of Natural Sciences and Mathematics, Ss. Cyril & Methodius University., 38(2), 283-292.
https://doi.org/10.20450/mjcce.2019.1678
Kljajević LM, Melichova Z, Stojmenović M, Todorović BŽ, Pavlović VB, Čitaković N, Nenadović SS. Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite). Macedonian Journal of Chemistry and Chemical Engineering. 2019;38(2):283-292
Kljajević Ljiljana M., Melichova Zuzana, Stojmenović Marija, Todorović Bratislav Ž., Pavlović Vladimir B., Čitaković Nada, Nenadović Snežana S., "Structural and electrical properties of geopolymer materials based on different precursors (kaolin, bentonite and diatomite)" Macedonian Journal of Chemistry and Chemical Engineering, 38, no. 2 (2019):283-292,
https://doi.org/10.20450/mjcce.2019.1678 .
1
1
1

Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia

Todorović, Bratislav Ž.; Stojiljković, Dragan T.; Pantić-Petrović, Tanja; Matović, Branko; Prekajski-Đorđević, Marija D.; Petrović, Sanja M.; Stojiljković, Milena S.; Stevanović, Miloš M.

(2019)

TY  - JOUR
AU  - Todorović, Bratislav Ž.
AU  - Stojiljković, Dragan T.
AU  - Pantić-Petrović, Tanja
AU  - Matović, Branko
AU  - Prekajski-Đorđević, Marija D.
AU  - Petrović, Sanja M.
AU  - Stojiljković, Milena S.
AU  - Stevanović, Miloš M.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8493
AB  - There are no available data about direct burkeite formation on the geothermal waters pipelines in Europe. Data about accompanying minerals of burkeite are also scarce. This mineral has been found in the scale on pipelines of VG-2 and VG-3 boreholes at Vranjska Banja, Serbia. Geothermal waters from these boreholes have temperatures in the range of 103 and 105 °C which classifies them to the warmest waters in the continental Europe. Based on physicochemical and geochemical data, VG-2 and VG-3 geothermal waters can be classified as Na–Alk–SO4Cl type of waters. According to their temperatures, total hardness and pH values, these waters belong to hyperthermal, very soft and moderately alkaline. Calculated LSI (0.4 and 1.7) and RSI (6.5 and 4.8) values indicate their scale formation tendency. Results of the spectrometric scale examination from the pipe deposits provide a clear qualitative and quantitative burkeite characterization with its accompanying minerals. FTIR analysis points to the presence of carbonate (1766, 1458, 877 and 705 cm−1) and sulfate bands (1139, 1116 and 617 cm−1). Apart from the qualitative analysis, XRD also shows the burkeite mass part in the scale. VG-2 geothermal water contains about 50% of burkeite, which is associated with trona mineral (40%) and smaller amount of halite of about 10%. Burkeite is a dominant phase (> 60%) in VG-3 water, with the presence of a significant halite quantity (> 35%) and a minor calcite quantity (2%). © 2019, International Association for Mathematical Geosciences.
T2  - Natural Resources Research
T1  - Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia
VL  - 28
IS  - 4
SP  - 1259
EP  - 1267
DO  - 10.1007/s11053-019-09455-y
ER  - 
@article{
author = "Todorović, Bratislav Ž. and Stojiljković, Dragan T. and Pantić-Petrović, Tanja and Matović, Branko and Prekajski-Đorđević, Marija D. and Petrović, Sanja M. and Stojiljković, Milena S. and Stevanović, Miloš M.",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8493",
abstract = "There are no available data about direct burkeite formation on the geothermal waters pipelines in Europe. Data about accompanying minerals of burkeite are also scarce. This mineral has been found in the scale on pipelines of VG-2 and VG-3 boreholes at Vranjska Banja, Serbia. Geothermal waters from these boreholes have temperatures in the range of 103 and 105 °C which classifies them to the warmest waters in the continental Europe. Based on physicochemical and geochemical data, VG-2 and VG-3 geothermal waters can be classified as Na–Alk–SO4Cl type of waters. According to their temperatures, total hardness and pH values, these waters belong to hyperthermal, very soft and moderately alkaline. Calculated LSI (0.4 and 1.7) and RSI (6.5 and 4.8) values indicate their scale formation tendency. Results of the spectrometric scale examination from the pipe deposits provide a clear qualitative and quantitative burkeite characterization with its accompanying minerals. FTIR analysis points to the presence of carbonate (1766, 1458, 877 and 705 cm−1) and sulfate bands (1139, 1116 and 617 cm−1). Apart from the qualitative analysis, XRD also shows the burkeite mass part in the scale. VG-2 geothermal water contains about 50% of burkeite, which is associated with trona mineral (40%) and smaller amount of halite of about 10%. Burkeite is a dominant phase (> 60%) in VG-3 water, with the presence of a significant halite quantity (> 35%) and a minor calcite quantity (2%). © 2019, International Association for Mathematical Geosciences.",
journal = "Natural Resources Research",
title = "Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia",
volume = "28",
number = "4",
pages = "1259-1267",
doi = "10.1007/s11053-019-09455-y"
}
Todorović, B. Ž., Stojiljković, D. T., Pantić-Petrović, T., Matović, B., Prekajski-Đorđević, M. D., Petrović, S. M., Stojiljković, M. S.,& Stevanović, M. M. (2019). Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia.
Natural Resources Research, 28(4), 1259-1267.
https://doi.org/10.1007/s11053-019-09455-y
Todorović BŽ, Stojiljković DT, Pantić-Petrović T, Matović B, Prekajski-Đorđević MD, Petrović SM, Stojiljković MS, Stevanović MM. Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia. Natural Resources Research. 2019;28(4):1259-1267
Todorović Bratislav Ž., Stojiljković Dragan T., Pantić-Petrović Tanja, Matović Branko, Prekajski-Đorđević Marija D., Petrović Sanja M., Stojiljković Milena S., Stevanović Miloš M., "Direct Formation of Burkeite in the Geothermal Waters at Vranjska Banja, Serbia" Natural Resources Research, 28, no. 4 (2019):1259-1267,
https://doi.org/10.1007/s11053-019-09455-y .

The influence of alumino-silicate matrix composition on surface hydrophobic properties

Kljajević, Ljiljana M.; Melichova, Zuzana; Kisić, Danilo; Nenadović, Miloš; Todorović, Bratislav Ž.; Pavlović, Vladimir B.; Nenadović, Snežana S.

(2019)

TY  - JOUR
AU  - Kljajević, Ljiljana M.
AU  - Melichova, Zuzana
AU  - Kisić, Danilo
AU  - Nenadović, Miloš
AU  - Todorović, Bratislav Ž.
AU  - Pavlović, Vladimir B.
AU  - Nenadović, Snežana S.
PY  - 2019
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8440
AB  - The purpose of this investigation is to investigate the hydrophobicity of geopolymers, new alumino-silicate materials and the influence of Si/Al ratio on their surface properties. Contact angle measurement (CAM) as reliable indicator of hydrophobicity was determined for synthesized geopolymers using water and ethylene-glycol as reference liquids. Geopolymers were synthesized from various precursors: Kaolin, bentonite and diatomite. Characterization of phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. Contact angle measurements confirmed that the geopolymers synthesized from metakaolin are the most porous, which can be explained by the smallest Si/Al ratio. The maximum value of contact angle and free surface energy (110.2 mJ/m2) has been achieved for geopolymer synthesized by diatoms (GPMD). SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel and is significantly different from the micrographs of other two geopolymer samples, GPMB and GPMK. © 2018 Authors.
T2  - Science of Sintering
T1  - The influence of alumino-silicate matrix composition on surface hydrophobic properties
VL  - 51
IS  - 2
SP  - 163
EP  - 173
DO  - 10.2298/SOS1902163K
ER  - 
@article{
author = "Kljajević, Ljiljana M. and Melichova, Zuzana and Kisić, Danilo and Nenadović, Miloš and Todorović, Bratislav Ž. and Pavlović, Vladimir B. and Nenadović, Snežana S.",
year = "2019",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/8440",
abstract = "The purpose of this investigation is to investigate the hydrophobicity of geopolymers, new alumino-silicate materials and the influence of Si/Al ratio on their surface properties. Contact angle measurement (CAM) as reliable indicator of hydrophobicity was determined for synthesized geopolymers using water and ethylene-glycol as reference liquids. Geopolymers were synthesized from various precursors: Kaolin, bentonite and diatomite. Characterization of phase structure and microstructure was performed by XRD, FTIR, SEM/EDX methods. Contact angle measurements confirmed that the geopolymers synthesized from metakaolin are the most porous, which can be explained by the smallest Si/Al ratio. The maximum value of contact angle and free surface energy (110.2 mJ/m2) has been achieved for geopolymer synthesized by diatoms (GPMD). SEM micrograph of GPMD shows a homogeneous surface with some longitudinal cavities in the gel and is significantly different from the micrographs of other two geopolymer samples, GPMB and GPMK. © 2018 Authors.",
journal = "Science of Sintering",
title = "The influence of alumino-silicate matrix composition on surface hydrophobic properties",
volume = "51",
number = "2",
pages = "163-173",
doi = "10.2298/SOS1902163K"
}
Kljajević, L. M., Melichova, Z., Kisić, D., Nenadović, M., Todorović, B. Ž., Pavlović, V. B.,& Nenadović, S. S. (2019). The influence of alumino-silicate matrix composition on surface hydrophobic properties.
Science of Sintering, 51(2), 163-173.
https://doi.org/10.2298/SOS1902163K
Kljajević LM, Melichova Z, Kisić D, Nenadović M, Todorović BŽ, Pavlović VB, Nenadović SS. The influence of alumino-silicate matrix composition on surface hydrophobic properties. Science of Sintering. 2019;51(2):163-173
Kljajević Ljiljana M., Melichova Zuzana, Kisić Danilo, Nenadović Miloš, Todorović Bratislav Ž., Pavlović Vladimir B., Nenadović Snežana S., "The influence of alumino-silicate matrix composition on surface hydrophobic properties" Science of Sintering, 51, no. 2 (2019):163-173,
https://doi.org/10.2298/SOS1902163K .
3
4
1

Physicochemical and radiological characterization of kaolin and its polymerization products

Ivanović, Marija D.; Kljajević, Ljiljana M.; Nenadović, Miloš; Bundaleski, Nenad; Vukanac, Ivana; Todorović, Bratislav Ž.; Nenadović, Snežana S.

(2018)

TY  - JOUR
AU  - Ivanović, Marija D.
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Miloš
AU  - Bundaleski, Nenad
AU  - Vukanac, Ivana
AU  - Todorović, Bratislav Ž.
AU  - Nenadović, Snežana S.
PY  - 2018
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7706
UR  - http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2219
AB  - The aim of this study was determination of physical-chemical and radiological characteristics of kaolin and products of alkali-activated thermally treated kaolin (geopolymer). Also, the objective of presented research was to investigate the possibility of kaolin application as a pigment or as a raw material for obtaining geopolymer materials as a relatively new ones in a building material industry. Physicochemical characterization of one set of samples was conducted using X-ray diffraction (XRD), Fourier transform infra-red (FTIR) and X-ray photoelectron spectroscopy (XPS). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin and geopolymer were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), calculated in accordance with the UNSCEAR 2000 report, are also presented in this paper. Kaolin was heat-treated on 750oC and specific activity of natural radionuclide in metakaolin increased up to 1.6, while measured specific activities in geopolymer were the lowest.
T2  - Materiales de Construccion
T1  - Physicochemical and radiological characterization of kaolin and its polymerization products
VL  - 68
IS  - 330
DO  - 10.3989/mc.2018.00517
ER  - 
@article{
author = "Ivanović, Marija D. and Kljajević, Ljiljana M. and Nenadović, Miloš and Bundaleski, Nenad and Vukanac, Ivana and Todorović, Bratislav Ž. and Nenadović, Snežana S.",
year = "2018",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/7706, http://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2219",
abstract = "The aim of this study was determination of physical-chemical and radiological characteristics of kaolin and products of alkali-activated thermally treated kaolin (geopolymer). Also, the objective of presented research was to investigate the possibility of kaolin application as a pigment or as a raw material for obtaining geopolymer materials as a relatively new ones in a building material industry. Physicochemical characterization of one set of samples was conducted using X-ray diffraction (XRD), Fourier transform infra-red (FTIR) and X-ray photoelectron spectroscopy (XPS). Activity concentration of naturally occurring radionuclides in kaolin, metakaolin and geopolymer were determined. The absorbed dose rate (D) and the annual effective dose rate (EDR), calculated in accordance with the UNSCEAR 2000 report, are also presented in this paper. Kaolin was heat-treated on 750oC and specific activity of natural radionuclide in metakaolin increased up to 1.6, while measured specific activities in geopolymer were the lowest.",
journal = "Materiales de Construccion",
title = "Physicochemical and radiological characterization of kaolin and its polymerization products",
volume = "68",
number = "330",
doi = "10.3989/mc.2018.00517"
}
Ivanović, M. D., Kljajević, L. M., Nenadović, M., Bundaleski, N., Vukanac, I., Todorović, B. Ž.,& Nenadović, S. S. (2018). Physicochemical and radiological characterization of kaolin and its polymerization products.
Materiales de Construccion, 68(330).
https://doi.org/10.3989/mc.2018.00517
Ivanović MD, Kljajević LM, Nenadović M, Bundaleski N, Vukanac I, Todorović BŽ, Nenadović SS. Physicochemical and radiological characterization of kaolin and its polymerization products. Materiales de Construccion. 2018;68(330)
Ivanović Marija D., Kljajević Ljiljana M., Nenadović Miloš, Bundaleski Nenad, Vukanac Ivana, Todorović Bratislav Ž., Nenadović Snežana S., "Physicochemical and radiological characterization of kaolin and its polymerization products" Materiales de Construccion, 68, no. 330 (2018),
https://doi.org/10.3989/mc.2018.00517 .
2
2
3

The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer

Ivanović, Marija D.; Kljajević, Ljiljana M.; Gulicovski, Jelena J.; Todorović, Bratislav Ž.; Egelja, Adela; Pavlović, Vladimir B.; Nenadović, Snežana S.

(Belgrade : Serbian Academy of Sciences and Arts, 2018)

TY  - CONF
AU  - Ivanović, Marija D.
AU  - Kljajević, Ljiljana M.
AU  - Gulicovski, Jelena J.
AU  - Todorović, Bratislav Ž.
AU  - Egelja, Adela
AU  - Pavlović, Vladimir B.
AU  - Nenadović, Snežana S.
PY  - 2018
UR  - http://dais.sanu.ac.rs/123456789/3630
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/8730
AB  - The goal of this research was to produce an environmental friendly, energy saving inorganic polymer using a metakaolin as a precursor. The clean technology which conserve the natural environment was employed for the production of these materials. The used kaolinite is clay obtained from Rudovci, Lazarevac, Serbia. Physicochemical properties of kaolin were investigated in previous work by Nenadović et al. [1]. Metakaolin (MK) was prepared by calcining kaolinite at 750 °C for 1 h. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of polymerization of metakaolin is investigated. The alkaline solution was prepared from sodium silicate and 2M, 4M, 6M and 8 M NaOH (analytical grade) (volume ratio Na2SiO3/NaOH = 1.6). The inorganic polymer (IP) samples were formed from metakaolin and the four different alkaline solution (solid/liquid ratio was about 1), which were mixed for 15 min and then left at room temperature for one day. Finally, the mixture was kept in a sample drying oven for 2 days at 60 °C. Process of aging time of inorganic polymer samples at 7th, 14th, 21st and 28th days is followed by some analytical methods (XRD, FTIR). X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) were used for characterization of metakaolin and metakaolin based inorganic polymers. After 28th days when the aging time were finished, on the surface of the samples were used scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). XRD analysis almost of all inorganic polymer samples revealed their amorphouslike structure with the position of an amorphous halo in the range 18°-32°, which indicates short range ordering of the reference sample with crystalline admixture of SiO2 (α-quartz, ICSD 89). The FTIR spectra of all samples shows a strong peak at ∼1000 cm−1 which is associated with Si–O–Si asymmetric stretching vibrations and is the finger print of the geopolymerization [2,3]. The FT-IR results show a shift of the Si-O or Si-O-X bands as the molarity of activator increasing during polymerization process, where X can be Si or Al. Both methods and XRD, as well as FTIR, show greater sensitivity to monitoring the effects of molarity, than the aging time within the same molarity to structural changes in inorganic polymer. SEM micrographs (Fig.1) showed a denser matrix, and a lower content of unreacted metakaolin particles due to increasing of molarity of NaOH. Structural reorganization of inorganic polymer samples occurs during the curing or aging in accordance with a polymerization mechanism.
PB  - Belgrade : Serbian Academy of Sciences and Arts
C3  - Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
T1  - The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer
SP  - 204
EP  - 206
ER  - 
@conference{
author = "Ivanović, Marija D. and Kljajević, Ljiljana M. and Gulicovski, Jelena J. and Todorović, Bratislav Ž. and Egelja, Adela and Pavlović, Vladimir B. and Nenadović, Snežana S.",
year = "2018",
url = "http://dais.sanu.ac.rs/123456789/3630, http://vinar.vin.bg.ac.rs/handle/123456789/8730",
abstract = "The goal of this research was to produce an environmental friendly, energy saving inorganic polymer using a metakaolin as a precursor. The clean technology which conserve the natural environment was employed for the production of these materials. The used kaolinite is clay obtained from Rudovci, Lazarevac, Serbia. Physicochemical properties of kaolin were investigated in previous work by Nenadović et al. [1]. Metakaolin (MK) was prepared by calcining kaolinite at 750 °C for 1 h. The influence of alkali activation, i.e. different concentration of NaOH as a component of alkali activator mixture on the process of polymerization of metakaolin is investigated. The alkaline solution was prepared from sodium silicate and 2M, 4M, 6M and 8 M NaOH (analytical grade) (volume ratio Na2SiO3/NaOH = 1.6). The inorganic polymer (IP) samples were formed from metakaolin and the four different alkaline solution (solid/liquid ratio was about 1), which were mixed for 15 min and then left at room temperature for one day. Finally, the mixture was kept in a sample drying oven for 2 days at 60 °C. Process of aging time of inorganic polymer samples at 7th, 14th, 21st and 28th days is followed by some analytical methods (XRD, FTIR). X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) were used for characterization of metakaolin and metakaolin based inorganic polymers. After 28th days when the aging time were finished, on the surface of the samples were used scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS). XRD analysis almost of all inorganic polymer samples revealed their amorphouslike structure with the position of an amorphous halo in the range 18°-32°, which indicates short range ordering of the reference sample with crystalline admixture of SiO2 (α-quartz, ICSD 89). The FTIR spectra of all samples shows a strong peak at ∼1000 cm−1 which is associated with Si–O–Si asymmetric stretching vibrations and is the finger print of the geopolymerization [2,3]. The FT-IR results show a shift of the Si-O or Si-O-X bands as the molarity of activator increasing during polymerization process, where X can be Si or Al. Both methods and XRD, as well as FTIR, show greater sensitivity to monitoring the effects of molarity, than the aging time within the same molarity to structural changes in inorganic polymer. SEM micrographs (Fig.1) showed a denser matrix, and a lower content of unreacted metakaolin particles due to increasing of molarity of NaOH. Structural reorganization of inorganic polymer samples occurs during the curing or aging in accordance with a polymerization mechanism.",
publisher = "Belgrade : Serbian Academy of Sciences and Arts",
journal = "Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia",
title = "The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer",
pages = "204-206"
}
Ivanović, M. D., Kljajević, L. M., Gulicovski, J. J., Todorović, B. Ž., Egelja, A., Pavlović, V. B.,& Nenadović, S. S. (2018). The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer.
Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia
Belgrade : Serbian Academy of Sciences and Arts., 204-206.
Ivanović MD, Kljajević LM, Gulicovski JJ, Todorović BŽ, Egelja A, Pavlović VB, Nenadović SS. The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer. Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia. 2018;:204-206
Ivanović Marija D., Kljajević Ljiljana M., Gulicovski Jelena J., Todorović Bratislav Ž., Egelja Adela, Pavlović Vladimir B., Nenadović Snežana S., "The Effect of Alkaline Activator Molarity and Aging Time on the Structure of Inorganic Polymer" Program and Book of Abstracts / First International Conference on Electron Microscopy of Nanostructures ELMINA 2018, August 27-29, 2018, Belgrade, Serbia (2018):204-206

Structural and chemical properties of thermally treated geopolymer samples

Kljajević, Ljiljana M.; Nenadović, Snežana S.; Nenadović, Miloš; Bundaleski, Nenad; Todorović, Bratislav Ž.; Pavlović, Vladimir B.; Rakočević, Zlatko Lj.

(2017)

TY  - JOUR
AU  - Kljajević, Ljiljana M.
AU  - Nenadović, Snežana S.
AU  - Nenadović, Miloš
AU  - Bundaleski, Nenad
AU  - Todorović, Bratislav Ž.
AU  - Pavlović, Vladimir B.
AU  - Rakočević, Zlatko Lj.
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1579
AB  - This article presents the results of the compositional, structural and morphological study of geopolymers synthesized from metakaolin and an alkali activator. The study involved the investigation of the structural and chemical properties of the geopolymer, in addition to thermally treated geopolymers up to 600 and 900 degrees C. The precursor of the geopolymer, and the geopolymer samples before and after the thermal treatment, were investigated by Fourier transformation infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and SEM analysis. The corrected average value of the ratio of silicon and aluminum in the geopolymer samples (SiGp:Al) is about 1.46, which suggests that the obtained geopolymer samples represent a mixture of roughly equal amounts of sialate and sialate-siloxo units. Annealing the geopolymer samples at 600 degrees C decreases the amount of Si-ONa bonds and induces the cross-linking of polymer changes. At the same time, other sodium containing alumino-silicate phases are created. The thermal treatment at 900 degrees C leads to a considerable reduction of oxygen and particularly sodium, followed by significant morphological changes i.e. formation of a complex porous structure. Additionally, a new semicrystaline phase appears. Both XRD and XPS results imply that this new phase may be nepheline and it is plausible that this phase begins to nucleate at temperatures below 900 degrees C.
T2  - Ceramics International
T1  - Structural and chemical properties of thermally treated geopolymer samples
VL  - 43
IS  - 9
SP  - 6700
EP  - 6708
DO  - 10.1016/j.ceramint.2017.02.066
ER  - 
@article{
author = "Kljajević, Ljiljana M. and Nenadović, Snežana S. and Nenadović, Miloš and Bundaleski, Nenad and Todorović, Bratislav Ž. and Pavlović, Vladimir B. and Rakočević, Zlatko Lj.",
year = "2017",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1579",
abstract = "This article presents the results of the compositional, structural and morphological study of geopolymers synthesized from metakaolin and an alkali activator. The study involved the investigation of the structural and chemical properties of the geopolymer, in addition to thermally treated geopolymers up to 600 and 900 degrees C. The precursor of the geopolymer, and the geopolymer samples before and after the thermal treatment, were investigated by Fourier transformation infrared spectroscopy (FTIR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and SEM analysis. The corrected average value of the ratio of silicon and aluminum in the geopolymer samples (SiGp:Al) is about 1.46, which suggests that the obtained geopolymer samples represent a mixture of roughly equal amounts of sialate and sialate-siloxo units. Annealing the geopolymer samples at 600 degrees C decreases the amount of Si-ONa bonds and induces the cross-linking of polymer changes. At the same time, other sodium containing alumino-silicate phases are created. The thermal treatment at 900 degrees C leads to a considerable reduction of oxygen and particularly sodium, followed by significant morphological changes i.e. formation of a complex porous structure. Additionally, a new semicrystaline phase appears. Both XRD and XPS results imply that this new phase may be nepheline and it is plausible that this phase begins to nucleate at temperatures below 900 degrees C.",
journal = "Ceramics International",
title = "Structural and chemical properties of thermally treated geopolymer samples",
volume = "43",
number = "9",
pages = "6700-6708",
doi = "10.1016/j.ceramint.2017.02.066"
}
Kljajević, L. M., Nenadović, S. S., Nenadović, M., Bundaleski, N., Todorović, B. Ž., Pavlović, V. B.,& Rakočević, Z. Lj. (2017). Structural and chemical properties of thermally treated geopolymer samples.
Ceramics International, 43(9), 6700-6708.
https://doi.org/10.1016/j.ceramint.2017.02.066
Kljajević LM, Nenadović SS, Nenadović M, Bundaleski N, Todorović BŽ, Pavlović VB, Rakočević ZL. Structural and chemical properties of thermally treated geopolymer samples. Ceramics International. 2017;43(9):6700-6708
Kljajević Ljiljana M., Nenadović Snežana S., Nenadović Miloš, Bundaleski Nenad, Todorović Bratislav Ž., Pavlović Vladimir B., Rakočević Zlatko Lj., "Structural and chemical properties of thermally treated geopolymer samples" Ceramics International, 43, no. 9 (2017):6700-6708,
https://doi.org/10.1016/j.ceramint.2017.02.066 .
40
39
40

Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres

Prekajski, Marija D.; Mirković, Miljana M.; Todorović, Bratislav Ž.; Matkovic, Aleksandar; Marinović-Cincović, Milena; Luković, Jelena M.; Matović, Branko

(2016)

TY  - JOUR
AU  - Prekajski, Marija D.
AU  - Mirković, Miljana M.
AU  - Todorović, Bratislav Ž.
AU  - Matkovic, Aleksandar
AU  - Marinović-Cincović, Milena
AU  - Luković, Jelena M.
AU  - Matović, Branko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/924
AB  - Nanoemulsion technique was applied for synthesis of carbonated strontium hydroxyapatite (CSrHAp) at room temperature. X-ray powder diffraction analysis accompanied with Rietveld refinement reviled that synthesized powder were single-phase hydroxyapatite. Fourier transform infrared (FTIR) spectroscopy showed that the CSrHAp was A-type substitution. The carbonate amount substituting the hydroxide group in the synthesized apatite was estimated, from the corresponding CO2 weight loss in the range 600-1100 degrees C. According to this empirical formula of as synthesized CHAp is S-10(PO4)(6)(OH)(0.60)(CO3)(0.70). These results were confirmed by the Rietveld refinement analysis. Using scanning electron microscopy analysis it was found that the synthesized CSrHAp particles were spherical in shape and that their sizes were in the nanometer range. Nanoemulsion strategy procedure provides a simple pathway to obtain single-phase CSrHAp. (C) 2015 Elsevier Ltd. All rights reserved.
T2  - Journal of the European Ceramic Society
T1  - Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres
VL  - 36
IS  - 5
SP  - 1293
EP  - 1298
DO  - 10.1016/j.jeurceramsoc.2015.11.045
ER  - 
@article{
author = "Prekajski, Marija D. and Mirković, Miljana M. and Todorović, Bratislav Ž. and Matkovic, Aleksandar and Marinović-Cincović, Milena and Luković, Jelena M. and Matović, Branko",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/924",
abstract = "Nanoemulsion technique was applied for synthesis of carbonated strontium hydroxyapatite (CSrHAp) at room temperature. X-ray powder diffraction analysis accompanied with Rietveld refinement reviled that synthesized powder were single-phase hydroxyapatite. Fourier transform infrared (FTIR) spectroscopy showed that the CSrHAp was A-type substitution. The carbonate amount substituting the hydroxide group in the synthesized apatite was estimated, from the corresponding CO2 weight loss in the range 600-1100 degrees C. According to this empirical formula of as synthesized CHAp is S-10(PO4)(6)(OH)(0.60)(CO3)(0.70). These results were confirmed by the Rietveld refinement analysis. Using scanning electron microscopy analysis it was found that the synthesized CSrHAp particles were spherical in shape and that their sizes were in the nanometer range. Nanoemulsion strategy procedure provides a simple pathway to obtain single-phase CSrHAp. (C) 2015 Elsevier Ltd. All rights reserved.",
journal = "Journal of the European Ceramic Society",
title = "Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres",
volume = "36",
number = "5",
pages = "1293-1298",
doi = "10.1016/j.jeurceramsoc.2015.11.045"
}
Prekajski, M. D., Mirković, M. M., Todorović, B. Ž., Matkovic, A., Marinović-Cincović, M., Luković, J. M.,& Matović, B. (2016). Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres.
Journal of the European Ceramic Society, 36(5), 1293-1298.
https://doi.org/10.1016/j.jeurceramsoc.2015.11.045
Prekajski MD, Mirković MM, Todorović BŽ, Matkovic A, Marinović-Cincović M, Luković JM, Matović B. Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres. Journal of the European Ceramic Society. 2016;36(5):1293-1298
Prekajski Marija D., Mirković Miljana M., Todorović Bratislav Ž., Matkovic Aleksandar, Marinović-Cincović Milena, Luković Jelena M., Matović Branko, "Ouzo effect-New simple nanoemulsion method for synthesis of strontium hydroxyapatite nanospheres" Journal of the European Ceramic Society, 36, no. 5 (2016):1293-1298,
https://doi.org/10.1016/j.jeurceramsoc.2015.11.045 .
13
15
15

Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen

Premovic, Pavle I.; Todorović, Bratislav Ž.; Pavlović, Mirjana S.

(2007)

TY  - JOUR
AU  - Premovic, Pavle I.
AU  - Todorović, Bratislav Ž.
AU  - Pavlović, Mirjana S.
PY  - 2007
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3232
AB  - Geochemical analyses of trace metals (Ir, Ni, Co, Cr, Zn, Au and Pb) and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in kerogen of the black marl at the Cretaceous-Paleogene boundary Fish Clay at Hojerup have been undertaken. Substantial proportions of the trace metals and rare earths were probably contained in terrestrial humic substances (the kerogen precursor) arriving at the marine sedimentary site. This is in accord with a previous hypothesis that kerogen is mainly derived from humic acids of an oxic soil in of the adjacent coastal areas of eastern Denmark. It is also suggested that humics were transported mainly through fluvial transport into the site of the deposition of the Fish Clay. The local weathering/leaching of the impact-ejecta fallout on the land surface or local terrestrial rocks by impact-induced? acid surface waters perhaps played an important role in providing trace metals and rare earths for these humic substances. Apparently, chondritic Ir, An, Ni, Co, Cr and chondritic and non-chondritic Zn originated from the impact fallout; Pb and rare earth elements were most likely sourced by the rocks exposed in the coastal areas of eastern Denmark.
T2  - Bulletin de La Societe Geologique de France
T1  - Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen
VL  - 178
IS  - 5
SP  - 411
EP  - 421
DO  - 10.2113/gssgfbull.178.5.411
ER  - 
@article{
author = "Premovic, Pavle I. and Todorović, Bratislav Ž. and Pavlović, Mirjana S.",
year = "2007",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3232",
abstract = "Geochemical analyses of trace metals (Ir, Ni, Co, Cr, Zn, Au and Pb) and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in kerogen of the black marl at the Cretaceous-Paleogene boundary Fish Clay at Hojerup have been undertaken. Substantial proportions of the trace metals and rare earths were probably contained in terrestrial humic substances (the kerogen precursor) arriving at the marine sedimentary site. This is in accord with a previous hypothesis that kerogen is mainly derived from humic acids of an oxic soil in of the adjacent coastal areas of eastern Denmark. It is also suggested that humics were transported mainly through fluvial transport into the site of the deposition of the Fish Clay. The local weathering/leaching of the impact-ejecta fallout on the land surface or local terrestrial rocks by impact-induced? acid surface waters perhaps played an important role in providing trace metals and rare earths for these humic substances. Apparently, chondritic Ir, An, Ni, Co, Cr and chondritic and non-chondritic Zn originated from the impact fallout; Pb and rare earth elements were most likely sourced by the rocks exposed in the coastal areas of eastern Denmark.",
journal = "Bulletin de La Societe Geologique de France",
title = "Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen",
volume = "178",
number = "5",
pages = "411-421",
doi = "10.2113/gssgfbull.178.5.411"
}
Premovic, P. I., Todorović, B. Ž.,& Pavlović, M. S. (2007). Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen.
Bulletin de La Societe Geologique de France, 178(5), 411-421.
https://doi.org/10.2113/gssgfbull.178.5.411
Premovic PI, Todorović BŽ, Pavlović MS. Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen. Bulletin de La Societe Geologique de France. 2007;178(5):411-421
Premovic Pavle I., Todorović Bratislav Ž., Pavlović Mirjana S., "Cretaceous-Paleogene boundary Fish Clay at Hojerup (Stevns Klint, Denmark): trace metals in kerogen" Bulletin de La Societe Geologique de France, 178, no. 5 (2007):411-421,
https://doi.org/10.2113/gssgfbull.178.5.411 .
2
3
3

Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen

Premovic, Pavle I.; Krsmanovic, Milena M.; Todorović, Bratislav Ž.; Pavlović, Mirjana S.; Nikolic, Nikola D.; Djordjevic, Dragan M.

(2006)

TY  - JOUR
AU  - Premovic, Pavle I.
AU  - Krsmanovic, Milena M.
AU  - Todorović, Bratislav Ž.
AU  - Pavlović, Mirjana S.
AU  - Nikolic, Nikola D.
AU  - Djordjevic, Dragan M.
PY  - 2006
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3126
AB  - Geochemical analyses of trace metals (Ir, Ni and Zn) in the kerogen of the black marl of the Cretaceous-Tertiary boundary succession (Fish Clay) at Stevns Klint (Hojerup Church) were undertaken. The data for this kerogen were in accordance with a previous hypothesis(1) that this (insoluble) geoorganic polymer was derived from humic substances (mainly humic acids) of a nearshore soil. Substantial proportions of Ir, Ni and Zn within the kerogen structure were probably contained in these substances arriving at the sedimentary site. It is proposed that these humics were probably transported by acid surface waters (induced by the KT asteroid impact) into the shallow marine basin of Stevns Klint. It is also suggested that local leaching/weathering of the asteroidal impact fallout oil the land near these waters played an important role in providing Ir, Ni and Zn for these substances. Apparently, Ir, Ni and Zn of the kerogen were created by the chondritic component of the impact ejecta fallout.
T2  - Journal of the Serbian Chemical Society
T1  - Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen
VL  - 71
IS  - 7
SP  - 793
EP  - 806
DO  - 10.2298/JSC0607793P
ER  - 
@article{
author = "Premovic, Pavle I. and Krsmanovic, Milena M. and Todorović, Bratislav Ž. and Pavlović, Mirjana S. and Nikolic, Nikola D. and Djordjevic, Dragan M.",
year = "2006",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3126",
abstract = "Geochemical analyses of trace metals (Ir, Ni and Zn) in the kerogen of the black marl of the Cretaceous-Tertiary boundary succession (Fish Clay) at Stevns Klint (Hojerup Church) were undertaken. The data for this kerogen were in accordance with a previous hypothesis(1) that this (insoluble) geoorganic polymer was derived from humic substances (mainly humic acids) of a nearshore soil. Substantial proportions of Ir, Ni and Zn within the kerogen structure were probably contained in these substances arriving at the sedimentary site. It is proposed that these humics were probably transported by acid surface waters (induced by the KT asteroid impact) into the shallow marine basin of Stevns Klint. It is also suggested that local leaching/weathering of the asteroidal impact fallout oil the land near these waters played an important role in providing Ir, Ni and Zn for these substances. Apparently, Ir, Ni and Zn of the kerogen were created by the chondritic component of the impact ejecta fallout.",
journal = "Journal of the Serbian Chemical Society",
title = "Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen",
volume = "71",
number = "7",
pages = "793-806",
doi = "10.2298/JSC0607793P"
}
Premovic, P. I., Krsmanovic, M. M., Todorović, B. Ž., Pavlović, M. S., Nikolic, N. D.,& Djordjevic, D. M. (2006). Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen.
Journal of the Serbian Chemical Society, 71(7), 793-806.
https://doi.org/10.2298/JSC0607793P
Premovic PI, Krsmanovic MM, Todorović BŽ, Pavlović MS, Nikolic ND, Djordjevic DM. Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen. Journal of the Serbian Chemical Society. 2006;71(7):793-806
Premovic Pavle I., Krsmanovic Milena M., Todorović Bratislav Ž., Pavlović Mirjana S., Nikolic Nikola D., Djordjevic Dragan M., "Geochemistry of the cretaceous-tertiary boundary (Fish clay) at Stevns Klint (Denmark): Ir, Ni and Zn in kerogen" Journal of the Serbian Chemical Society, 71, no. 7 (2006):793-806,
https://doi.org/10.2298/JSC0607793P .
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Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl

Premovic, Pavle I.; Todorović, Bratislav Ž.; Nikolic, Nikola D.; Pavlović, Mirjana S.; Dordevic, Dragan M.; Dulanovic, Dejan T.

(2006)

TY  - JOUR
AU  - Premovic, Pavle I.
AU  - Todorović, Bratislav Ž.
AU  - Nikolic, Nikola D.
AU  - Pavlović, Mirjana S.
AU  - Dordevic, Dragan M.
AU  - Dulanovic, Dejan T.
PY  - 2006
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3087
AB  - The Cretaceus-Tertiary (KT) boundary at Stevns Klint (the Hojerup succession), Fiskeler, consists of a thin red clay layer overlain by a thick one of black marl. These two layers are made up mainly from cheto-smectite and biogenic calcite. The black marl shows an enhanced concentration of Ni (655 ppm) within its smectite fraction. Additionally, its carbonate fraction also shows an enhanced concentration of Ni (245 ppm). It is reasoned that these enrichments represent a sudden and rapid input of high amounts of Ni into the late Cretaccus seawater at Stevns Klint. The ultimate source of Ni in both the carbonate and smectite fractions of the black marl was probably impact fallout, produced by the KT asteroidal impact, deposited on the nearby soil and 1 ached by the (acid) surface waters. The geochemistry of the Ni supports the hypothesis that the smectite of this marl most likely has a local (marine or terrestrial) provenance and was probably redeposited, after its formation, from the original site to its present location at the KT boundary.
T2  - Journal of the Serbian Chemical Society
T1  - Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl
VL  - 71
IS  - 6
SP  - 639
EP  - 659
DO  - 10.2298/JSC0606639P
ER  - 
@article{
author = "Premovic, Pavle I. and Todorović, Bratislav Ž. and Nikolic, Nikola D. and Pavlović, Mirjana S. and Dordevic, Dragan M. and Dulanovic, Dejan T.",
year = "2006",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/3087",
abstract = "The Cretaceus-Tertiary (KT) boundary at Stevns Klint (the Hojerup succession), Fiskeler, consists of a thin red clay layer overlain by a thick one of black marl. These two layers are made up mainly from cheto-smectite and biogenic calcite. The black marl shows an enhanced concentration of Ni (655 ppm) within its smectite fraction. Additionally, its carbonate fraction also shows an enhanced concentration of Ni (245 ppm). It is reasoned that these enrichments represent a sudden and rapid input of high amounts of Ni into the late Cretaccus seawater at Stevns Klint. The ultimate source of Ni in both the carbonate and smectite fractions of the black marl was probably impact fallout, produced by the KT asteroidal impact, deposited on the nearby soil and 1 ached by the (acid) surface waters. The geochemistry of the Ni supports the hypothesis that the smectite of this marl most likely has a local (marine or terrestrial) provenance and was probably redeposited, after its formation, from the original site to its present location at the KT boundary.",
journal = "Journal of the Serbian Chemical Society",
title = "Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl",
volume = "71",
number = "6",
pages = "639-659",
doi = "10.2298/JSC0606639P"
}
Premovic, P. I., Todorović, B. Ž., Nikolic, N. D., Pavlović, M. S., Dordevic, D. M.,& Dulanovic, D. T. (2006). Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl.
Journal of the Serbian Chemical Society, 71(6), 639-659.
https://doi.org/10.2298/JSC0606639P
Premovic PI, Todorović BŽ, Nikolic ND, Pavlović MS, Dordevic DM, Dulanovic DT. Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl. Journal of the Serbian Chemical Society. 2006;71(6):639-659
Premovic Pavle I., Todorović Bratislav Ž., Nikolic Nikola D., Pavlović Mirjana S., Dordevic Dragan M., Dulanovic Dejan T., "Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl" Journal of the Serbian Chemical Society, 71, no. 6 (2006):639-659,
https://doi.org/10.2298/JSC0606639P .
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