TY  - JOUR
AU  - Đorđević, Jelena
AU  - Lazarević, Nataša
AU  - Zdjelarević, Nevena
AU  - Arbutina, Dalibor
AU  - Forkapić, Sofija
AU  - Janković, Marija
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12101
AB  - The main purpose of this paper was to determine tritium concentration in surface water samples, using liquid scintillation counting. Surface water samples were collected from the Mlaka creek on three different locations near PC „Nuclear Facilities of Serbia“. The importance of tritium monitoring around nuclear reactors and nuclear waste storages is due to prevention of possible internal exposure through ingestion of drinking waters with elevated levels of tritium from existing water supply in their nearby. Tritium concentrations that have been measured during the period from 2017 to 2022 ranged from less than 2 Bq/L to 103 Bq/L.
AB  - Glavni cilj ovog rada bio je da se utvrdi koncentracija tricijuma u uzorcima površinske vode. Korišćena metoda bila je tečna scintilaciona spektrometrija. Uzorci površinske vode uzeti su iz potoka Mlaka na tri različite lokacije u blizini JP „Nuklearni objekti Srbije“. Značaj monitoringa tricijuma oko nuklearnih reaktora i skladišta nuklearnog otpada je sprečavanje unutrašnjeg izlaganja unošenjenjem vode za piće sa povišenim nivoom tricijuma iz postojećih izvora vodosnabdevanja u njihovoj blizini. Koncentracije tricijuma koje su izmerene u periodu od 2017. do 2022. godine kretale su se od manje od 2 Bq/L do 103 Bq/L.
T2  - Scientific Technical Review
T1  - Determination of Tritium Concentration in Mlaka Creek
T1  - Određivanje koncentracije tricijuma u potoku Mlaka
VL  - 73
IS  - 1
SP  - 38
EP  - 41
DO  - 10.1016/j.tet.2020.131456
DO  - 10.5937/str2301038D
ER  - 

@article{
author = "Đorđević, Jelena and Lazarević, Nataša and Zdjelarević, Nevena and Arbutina, Dalibor and Forkapić, Sofija and Janković, Marija",
year = "2023",
abstract = "The main purpose of this paper was to determine tritium concentration in surface water samples, using liquid scintillation counting. Surface water samples were collected from the Mlaka creek on three different locations near PC „Nuclear Facilities of Serbia“. The importance of tritium monitoring around nuclear reactors and nuclear waste storages is due to prevention of possible internal exposure through ingestion of drinking waters with elevated levels of tritium from existing water supply in their nearby. Tritium concentrations that have been measured during the period from 2017 to 2022 ranged from less than 2 Bq/L to 103 Bq/L., Glavni cilj ovog rada bio je da se utvrdi koncentracija tricijuma u uzorcima površinske vode. Korišćena metoda bila je tečna scintilaciona spektrometrija. Uzorci površinske vode uzeti su iz potoka Mlaka na tri različite lokacije u blizini JP „Nuklearni objekti Srbije“. Značaj monitoringa tricijuma oko nuklearnih reaktora i skladišta nuklearnog otpada je sprečavanje unutrašnjeg izlaganja unošenjenjem vode za piće sa povišenim nivoom tricijuma iz postojećih izvora vodosnabdevanja u njihovoj blizini. Koncentracije tricijuma koje su izmerene u periodu od 2017. do 2022. godine kretale su se od manje od 2 Bq/L do 103 Bq/L.",
journal = "Scientific Technical Review",
title = "Determination of Tritium Concentration in Mlaka Creek, Određivanje koncentracije tricijuma u potoku Mlaka",
volume = "73",
number = "1",
pages = "38-41",
doi = "10.1016/j.tet.2020.131456, 10.5937/str2301038D"
}

Đorđević, J., Lazarević, N., Zdjelarević, N., Arbutina, D., Forkapić, S.,& Janković, M.. (2023). Determination of Tritium Concentration in Mlaka Creek. in Scientific Technical Review, 73(1), 38-41.
https://doi.org/10.1016/j.tet.2020.131456

Đorđević J, Lazarević N, Zdjelarević N, Arbutina D, Forkapić S, Janković M. Determination of Tritium Concentration in Mlaka Creek. in Scientific Technical Review. 2023;73(1):38-41.
doi:10.1016/j.tet.2020.131456 .

Đorđević, Jelena, Lazarević, Nataša, Zdjelarević, Nevena, Arbutina, Dalibor, Forkapić, Sofija, Janković, Marija, "Determination of Tritium Concentration in Mlaka Creek" in Scientific Technical Review, 73, no. 1 (2023):38-41,
https://doi.org/10.1016/j.tet.2020.131456 . .

TY  - JOUR
AU  - Lazarević, Nataša
AU  - Adnađević, Borivoj
AU  - Jovanović, Jelena
PY  - 2014
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/117
AB  - The non-isothermal kinetics of nicotine desorption from precipitated silicon dioxide was investigated. The non-isothermal thermogravimetric curves of nicotine desorption at different heating rates (beta = 5, 10 and 20 K/min) were recorded. The kinetics model of non-isothermal kinetics of nicotine desorption was determined by using the model-fitting and master-plot methods. It was found that non-isothermal nicotine desorption can mathematically describe by the theoretical kinetics model of phase - boundary controlled reaction (contracting volume, i.e., three dimensional shape) - R3. By applying the method of Kissinger and method of invariant kinetic parameters the values of kinetic parameters were determined. It was established that both applied method give almost identical kinetic parameters regardless their theoretical limitations. The dependence of activation energy on the degree of nicotine desorption was determined using the KAS method. It was found that the value of activation energy is independent on the degree of nicotine desorption. The effect of heating mode on the kinetic of nicotine desorption was analyzed. It was established that the type of heating mode (isothermal and non-isothermal) does not influence the mechanism of the formation of the activation complex nor the kinetics model of desorption. The increase in the values of kinetic parameters obtained for non-isothermal heating in comparison to the isothermal ones are explained with the Larsons model of selective transfer of energy. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Thermochimica Acta
T1  - Kinetic analysis of nicotine desorption from silicon dioxide under non-isothermal conditions
VL  - 589
SP  - 100
EP  - 106
DO  - 10.1016/j.tca.2014.05.023
ER  - 

@article{
author = "Lazarević, Nataša and Adnađević, Borivoj and Jovanović, Jelena",
year = "2014",
abstract = "The non-isothermal kinetics of nicotine desorption from precipitated silicon dioxide was investigated. The non-isothermal thermogravimetric curves of nicotine desorption at different heating rates (beta = 5, 10 and 20 K/min) were recorded. The kinetics model of non-isothermal kinetics of nicotine desorption was determined by using the model-fitting and master-plot methods. It was found that non-isothermal nicotine desorption can mathematically describe by the theoretical kinetics model of phase - boundary controlled reaction (contracting volume, i.e., three dimensional shape) - R3. By applying the method of Kissinger and method of invariant kinetic parameters the values of kinetic parameters were determined. It was established that both applied method give almost identical kinetic parameters regardless their theoretical limitations. The dependence of activation energy on the degree of nicotine desorption was determined using the KAS method. It was found that the value of activation energy is independent on the degree of nicotine desorption. The effect of heating mode on the kinetic of nicotine desorption was analyzed. It was established that the type of heating mode (isothermal and non-isothermal) does not influence the mechanism of the formation of the activation complex nor the kinetics model of desorption. The increase in the values of kinetic parameters obtained for non-isothermal heating in comparison to the isothermal ones are explained with the Larsons model of selective transfer of energy. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Thermochimica Acta",
title = "Kinetic analysis of nicotine desorption from silicon dioxide under non-isothermal conditions",
volume = "589",
pages = "100-106",
doi = "10.1016/j.tca.2014.05.023"
}

Lazarević, N., Adnađević, B.,& Jovanović, J.. (2014). Kinetic analysis of nicotine desorption from silicon dioxide under non-isothermal conditions. in Thermochimica Acta, 589, 100-106.
https://doi.org/10.1016/j.tca.2014.05.023

Lazarević N, Adnađević B, Jovanović J. Kinetic analysis of nicotine desorption from silicon dioxide under non-isothermal conditions. in Thermochimica Acta. 2014;589:100-106.
doi:10.1016/j.tca.2014.05.023 .

Lazarević, Nataša, Adnađević, Borivoj, Jovanović, Jelena, "Kinetic analysis of nicotine desorption from silicon dioxide under non-isothermal conditions" in Thermochimica Acta, 589 (2014):100-106,
https://doi.org/10.1016/j.tca.2014.05.023 . .

TY  - JOUR
AU  - Askrabic, S.
AU  - Dohcevic-Mitrovic, Z.
AU  - Kremenović, Aleksandar S.
AU  - Lazarević, Nataša
AU  - Kahlenberg, V.
AU  - Popović, Zoran V.
PY  - 2012
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4661
AB  - Nanocrystalline ceria (CeO2) is known for its ionic conductivity and oxygen storage properties, which depend on the presence of oxygen ion vacancies. The vacancies cause several important changes in CeO2 involving microstrain, electronic structure, magnetic properties, etc. In this article, we focus our attention to the microstructural changes of nanocrystalline CeO2-x annealed at different temperatures in the range 200500 degrees C. Structural and vibrational properties were investigated by X-ray diffraction and Raman spectroscopy. It was observed that the content of oxygen vacancies changed significantly with increasing annealing temperature, which plays an important role in the observed microstructural changes of the annealed samples. We demonstrate that the observed microstrain changes, because of variable defect content, dominate over the crystallite size effect. This finding is opposite to the conclusions made by several other authors. A new mode, classified as a probable surface mode, was observed in the Raman spectra at similar to 480 cm(1), the appearance of which can be explained by the large defective structure and disorder in the ceria lattice. Copyright (c) 2011 John Wiley and Sons, Ltd.
T2  - Journal of Raman Spectroscopy
T1  - Oxygen vacancy-induced microstructural changes of annealed CeO2-x nanocrystals
VL  - 43
IS  - 1
SP  - 76
EP  - 81
DO  - 10.1002/jrs.2987
ER  - 

@article{
author = "Askrabic, S. and Dohcevic-Mitrovic, Z. and Kremenović, Aleksandar S. and Lazarević, Nataša and Kahlenberg, V. and Popović, Zoran V.",
year = "2012",
abstract = "Nanocrystalline ceria (CeO2) is known for its ionic conductivity and oxygen storage properties, which depend on the presence of oxygen ion vacancies. The vacancies cause several important changes in CeO2 involving microstrain, electronic structure, magnetic properties, etc. In this article, we focus our attention to the microstructural changes of nanocrystalline CeO2-x annealed at different temperatures in the range 200500 degrees C. Structural and vibrational properties were investigated by X-ray diffraction and Raman spectroscopy. It was observed that the content of oxygen vacancies changed significantly with increasing annealing temperature, which plays an important role in the observed microstructural changes of the annealed samples. We demonstrate that the observed microstrain changes, because of variable defect content, dominate over the crystallite size effect. This finding is opposite to the conclusions made by several other authors. A new mode, classified as a probable surface mode, was observed in the Raman spectra at similar to 480 cm(1), the appearance of which can be explained by the large defective structure and disorder in the ceria lattice. Copyright (c) 2011 John Wiley and Sons, Ltd.",
journal = "Journal of Raman Spectroscopy",
title = "Oxygen vacancy-induced microstructural changes of annealed CeO2-x nanocrystals",
volume = "43",
number = "1",
pages = "76-81",
doi = "10.1002/jrs.2987"
}

Askrabic, S., Dohcevic-Mitrovic, Z., Kremenović, A. S., Lazarević, N., Kahlenberg, V.,& Popović, Z. V.. (2012). Oxygen vacancy-induced microstructural changes of annealed CeO2-x nanocrystals. in Journal of Raman Spectroscopy, 43(1), 76-81.
https://doi.org/10.1002/jrs.2987

Askrabic S, Dohcevic-Mitrovic Z, Kremenović AS, Lazarević N, Kahlenberg V, Popović ZV. Oxygen vacancy-induced microstructural changes of annealed CeO2-x nanocrystals. in Journal of Raman Spectroscopy. 2012;43(1):76-81.
doi:10.1002/jrs.2987 .

Askrabic, S., Dohcevic-Mitrovic, Z., Kremenović, Aleksandar S., Lazarević, Nataša, Kahlenberg, V., Popović, Zoran V., "Oxygen vacancy-induced microstructural changes of annealed CeO2-x nanocrystals" in Journal of Raman Spectroscopy, 43, no. 1 (2012):76-81,
https://doi.org/10.1002/jrs.2987 . .

TY  - JOUR
AU  - Adnađević, Borivoj
AU  - Jovanović, Jelena
AU  - Lazarević, Nataša
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4146
AB  - The isothermal kinetic of the release of nicotine from a poly(acrylic acid) (PAA) hydrogel was investigated at temperature range from 26 degrees C to 45 degrees C. Specific shape parameters of the kinetic curves, the period of linearity and saturation time were determined. The change in the specific shape parameters of the kinetic curves with temperature and the kinetic parameters of release of nicotine E(a) and ln A were determined. By applying the model fitting method it was established that the kinetic model of release of nicotine from the PAA hydrogel was [1 - (1 - alpha)(1/3)] = k(M)t. The limiting stage of the kinetics release of nicotine was found to be the contracting volume of the interaction interface. The distribution function of the activation energy was determined and the most probable values of activation energies of 25.5 kJ mol(-1) and 35 kJ mol(-1) were obtained. Energetically heterogeneity of the interaction interface was explained by the existence of the two different modes of bonding the nicotine molecules onto the hydrogel network by hydrogen bond and electrostatic forces. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 1805-1812, 2011
T2  - Journal of Applied Polymer Science
T1  - Kinetics Study of Isothermal Nicotine Release from Poly(acrylic acid) Hydrogel
VL  - 119
IS  - 3
SP  - 1805
EP  - 1812
DO  - 10.1002/app.32869
ER  - 

@article{
author = "Adnađević, Borivoj and Jovanović, Jelena and Lazarević, Nataša",
year = "2011",
abstract = "The isothermal kinetic of the release of nicotine from a poly(acrylic acid) (PAA) hydrogel was investigated at temperature range from 26 degrees C to 45 degrees C. Specific shape parameters of the kinetic curves, the period of linearity and saturation time were determined. The change in the specific shape parameters of the kinetic curves with temperature and the kinetic parameters of release of nicotine E(a) and ln A were determined. By applying the model fitting method it was established that the kinetic model of release of nicotine from the PAA hydrogel was [1 - (1 - alpha)(1/3)] = k(M)t. The limiting stage of the kinetics release of nicotine was found to be the contracting volume of the interaction interface. The distribution function of the activation energy was determined and the most probable values of activation energies of 25.5 kJ mol(-1) and 35 kJ mol(-1) were obtained. Energetically heterogeneity of the interaction interface was explained by the existence of the two different modes of bonding the nicotine molecules onto the hydrogel network by hydrogen bond and electrostatic forces. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 119: 1805-1812, 2011",
journal = "Journal of Applied Polymer Science",
title = "Kinetics Study of Isothermal Nicotine Release from Poly(acrylic acid) Hydrogel",
volume = "119",
number = "3",
pages = "1805-1812",
doi = "10.1002/app.32869"
}

Adnađević, B., Jovanović, J.,& Lazarević, N.. (2011). Kinetics Study of Isothermal Nicotine Release from Poly(acrylic acid) Hydrogel. in Journal of Applied Polymer Science, 119(3), 1805-1812.
https://doi.org/10.1002/app.32869

Adnađević B, Jovanović J, Lazarević N. Kinetics Study of Isothermal Nicotine Release from Poly(acrylic acid) Hydrogel. in Journal of Applied Polymer Science. 2011;119(3):1805-1812.
doi:10.1002/app.32869 .

Adnađević, Borivoj, Jovanović, Jelena, Lazarević, Nataša, "Kinetics Study of Isothermal Nicotine Release from Poly(acrylic acid) Hydrogel" in Journal of Applied Polymer Science, 119, no. 3 (2011):1805-1812,
https://doi.org/10.1002/app.32869 . .

TY  - JOUR
AU  - Lazarević, Nataša
AU  - Adnađević, Borivoj
AU  - Jovanović, Jelena
PY  - 2011
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4333
AB  - The isothermal adsorption of nicotine from an aqueous solution onto zeolite type USY was investigated. The adsorption isotherms of nicotine onto the zeolite at different temperatures ranging from 298 to 322K were determined. It was found that the adsorption isotherms can be described by the model of Freundlich adsorption isotherm. Based on the adsorption isotherms the changes of adsorption heat, free energy and entropy with adsorption degree were determined. The determined decrease of adsorption heat with adsorption degree can be explained by the presence of the adsorption centers of different energy and concentration on interface of zeolite-nicotine solution. It was found that the probability function of density distribution of the heat of adsorption (DDF) has exponential form. It was concluded that the possibility of fitting the adsorption isotherms of nicotine onto the zeolite by Freundlich adsorption isotherm was a direct consequence of that. The determined increase in entropy with the increase in adsorption degree can be explained with the change of phase state of adsorbed nicotine. (C) 2011 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - Adsorption of nicotine from aqueous solution onto hydrophobic zeolite type USY
VL  - 257
IS  - 18
SP  - 8017
EP  - 8023
DO  - 10.1016/j.apsusc.2011.04.076
ER  - 

@article{
author = "Lazarević, Nataša and Adnađević, Borivoj and Jovanović, Jelena",
year = "2011",
abstract = "The isothermal adsorption of nicotine from an aqueous solution onto zeolite type USY was investigated. The adsorption isotherms of nicotine onto the zeolite at different temperatures ranging from 298 to 322K were determined. It was found that the adsorption isotherms can be described by the model of Freundlich adsorption isotherm. Based on the adsorption isotherms the changes of adsorption heat, free energy and entropy with adsorption degree were determined. The determined decrease of adsorption heat with adsorption degree can be explained by the presence of the adsorption centers of different energy and concentration on interface of zeolite-nicotine solution. It was found that the probability function of density distribution of the heat of adsorption (DDF) has exponential form. It was concluded that the possibility of fitting the adsorption isotherms of nicotine onto the zeolite by Freundlich adsorption isotherm was a direct consequence of that. The determined increase in entropy with the increase in adsorption degree can be explained with the change of phase state of adsorbed nicotine. (C) 2011 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "Adsorption of nicotine from aqueous solution onto hydrophobic zeolite type USY",
volume = "257",
number = "18",
pages = "8017-8023",
doi = "10.1016/j.apsusc.2011.04.076"
}

Lazarević, N., Adnađević, B.,& Jovanović, J.. (2011). Adsorption of nicotine from aqueous solution onto hydrophobic zeolite type USY. in Applied Surface Science, 257(18), 8017-8023.
https://doi.org/10.1016/j.apsusc.2011.04.076

Lazarević N, Adnađević B, Jovanović J. Adsorption of nicotine from aqueous solution onto hydrophobic zeolite type USY. in Applied Surface Science. 2011;257(18):8017-8023.
doi:10.1016/j.apsusc.2011.04.076 .

Lazarević, Nataša, Adnađević, Borivoj, Jovanović, Jelena, "Adsorption of nicotine from aqueous solution onto hydrophobic zeolite type USY" in Applied Surface Science, 257, no. 18 (2011):8017-8023,
https://doi.org/10.1016/j.apsusc.2011.04.076 . .

TY  - JOUR
AU  - Adnađević, Borivoj
AU  - Lazarević, Nataša
AU  - Jovanović, Jelena
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4109
AB  - The isothermal kinetics of nicotine desorption from silicon dioxide (SiO(2)) was investigated. The isothermal thermogravimetric curves of nicotine at temperatures of 115 degrees C, 130 degrees C and 152 degrees C were recorded. The kinetic parameters (E(a), lnA) of desorption of nicotine were calculated using various methods (stationary point, model constants and differential isoconversion method). By applying the model-fitting method, it was found that the kinetic model of nicotine desorption from silicon dioxide was a phase boundary controlled reaction (contracting volume). The values of the kinetic parameters, E(a,alpha) and lnA(alpha), complexly change with changing degree of desorption and a compensation effect exists. A new mechanism of activation for the desorption of the absorbed molecules of nicotine was suggested in agreement with model of selective energy transfer. (C) 2010 Elsevier B.V. All rights reserved.
T2  - Applied Surface Science
T1  - A study of the kinetics of isothermal nicotine desorption from silicon dioxide
VL  - 257
IS  - 5
SP  - 1425
EP  - 1430
DO  - 10.1016/j.apsusc.2010.08.055
ER  - 

@article{
author = "Adnađević, Borivoj and Lazarević, Nataša and Jovanović, Jelena",
year = "2010",
abstract = "The isothermal kinetics of nicotine desorption from silicon dioxide (SiO(2)) was investigated. The isothermal thermogravimetric curves of nicotine at temperatures of 115 degrees C, 130 degrees C and 152 degrees C were recorded. The kinetic parameters (E(a), lnA) of desorption of nicotine were calculated using various methods (stationary point, model constants and differential isoconversion method). By applying the model-fitting method, it was found that the kinetic model of nicotine desorption from silicon dioxide was a phase boundary controlled reaction (contracting volume). The values of the kinetic parameters, E(a,alpha) and lnA(alpha), complexly change with changing degree of desorption and a compensation effect exists. A new mechanism of activation for the desorption of the absorbed molecules of nicotine was suggested in agreement with model of selective energy transfer. (C) 2010 Elsevier B.V. All rights reserved.",
journal = "Applied Surface Science",
title = "A study of the kinetics of isothermal nicotine desorption from silicon dioxide",
volume = "257",
number = "5",
pages = "1425-1430",
doi = "10.1016/j.apsusc.2010.08.055"
}

Adnađević, B., Lazarević, N.,& Jovanović, J.. (2010). A study of the kinetics of isothermal nicotine desorption from silicon dioxide. in Applied Surface Science, 257(5), 1425-1430.
https://doi.org/10.1016/j.apsusc.2010.08.055

Adnađević B, Lazarević N, Jovanović J. A study of the kinetics of isothermal nicotine desorption from silicon dioxide. in Applied Surface Science. 2010;257(5):1425-1430.
doi:10.1016/j.apsusc.2010.08.055 .

Adnađević, Borivoj, Lazarević, Nataša, Jovanović, Jelena, "A study of the kinetics of isothermal nicotine desorption from silicon dioxide" in Applied Surface Science, 257, no. 5 (2010):1425-1430,
https://doi.org/10.1016/j.apsusc.2010.08.055 . .