TY  - JOUR
AU  - Todorović, Vanja
AU  - Milenković, Marina
AU  - Vidović, Bojana
AU  - Todorović, Zoran B.
AU  - Šobajić, Slađana
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3014
AB  - Many factors can influence antioxidative and antimicrobial characteristics of plant materials. The quality of cocoa as functional food ingredient is influenced through its processing. The main aim of this study was to test if there is difference in polyphenol content, antioxidant capacity, and antimicrobial activity between nonalkalized and alkalized cocoa powders. To estimate polyphenol and flavonoid content in cocoa samples the spectrophotometric microassays were used. Flavan-3ols were determined with reversed-phase high-performance liquid chromatography (RP-HPLC). Antimicrobial activity against 3 Gram positive bacteria, 4 Gram negative bacteria and 1 strain of yeast was determined using broth microdilution method. Total polyphenol content was 1.8 times lower in alkalized cocoa samples than in natural ones. Epicatechin/catechin ratio was changed due to the process of alkalization in favor of catechin (2.21 in natural and 1.45 in alkalized cocoa powders). Combined results of 3 antioxidative tests (DPPH, FRAP, ABTS) were used for calculation of RACI (Relative Antioxidant Capacity Index) and GAS (Global Antioxidant Score) values that were consistently higher in natural than in alkalized cocoa extracts. Obtained results have shown significant correlations between these values and phenolic content (0.929  lt = r  lt = 0.957, P  lt  0.01). Antimicrobial activity varied from 5.0 to 25.0 mg/ml (MICs), while Candida albicans was the most sensitive tested microorganism. Cocoa powders subjected to alkalization had significantly reduced content of total and specific phenolic compounds and reduced antioxidant capacity (P  lt  0.05), but their antimicrobial activity was equal for Gram-positive bacteria or even significantly enhanced for Gram-negative bacteria.
PB  - Wiley, Hoboken
T2  - Journal of Food Science
T1  - Correlation between Antimicrobial, Antioxidant Activity, and Polyphenols of Alkalized/Nonalkalized Cocoa Powders
VL  - 82
IS  - 4
SP  - 1020
EP  - 1027
DO  - 10.1111/1750-3841.13672
ER  - 

@article{
author = "Todorović, Vanja and Milenković, Marina and Vidović, Bojana and Todorović, Zoran B. and Šobajić, Slađana",
year = "2017",
abstract = "Many factors can influence antioxidative and antimicrobial characteristics of plant materials. The quality of cocoa as functional food ingredient is influenced through its processing. The main aim of this study was to test if there is difference in polyphenol content, antioxidant capacity, and antimicrobial activity between nonalkalized and alkalized cocoa powders. To estimate polyphenol and flavonoid content in cocoa samples the spectrophotometric microassays were used. Flavan-3ols were determined with reversed-phase high-performance liquid chromatography (RP-HPLC). Antimicrobial activity against 3 Gram positive bacteria, 4 Gram negative bacteria and 1 strain of yeast was determined using broth microdilution method. Total polyphenol content was 1.8 times lower in alkalized cocoa samples than in natural ones. Epicatechin/catechin ratio was changed due to the process of alkalization in favor of catechin (2.21 in natural and 1.45 in alkalized cocoa powders). Combined results of 3 antioxidative tests (DPPH, FRAP, ABTS) were used for calculation of RACI (Relative Antioxidant Capacity Index) and GAS (Global Antioxidant Score) values that were consistently higher in natural than in alkalized cocoa extracts. Obtained results have shown significant correlations between these values and phenolic content (0.929  lt = r  lt = 0.957, P  lt  0.01). Antimicrobial activity varied from 5.0 to 25.0 mg/ml (MICs), while Candida albicans was the most sensitive tested microorganism. Cocoa powders subjected to alkalization had significantly reduced content of total and specific phenolic compounds and reduced antioxidant capacity (P  lt  0.05), but their antimicrobial activity was equal for Gram-positive bacteria or even significantly enhanced for Gram-negative bacteria.",
publisher = "Wiley, Hoboken",
journal = "Journal of Food Science",
title = "Correlation between Antimicrobial, Antioxidant Activity, and Polyphenols of Alkalized/Nonalkalized Cocoa Powders",
volume = "82",
number = "4",
pages = "1020-1027",
doi = "10.1111/1750-3841.13672"
}

Todorović, V., Milenković, M., Vidović, B., Todorović, Z. B.,& Šobajić, S.. (2017). Correlation between Antimicrobial, Antioxidant Activity, and Polyphenols of Alkalized/Nonalkalized Cocoa Powders. in Journal of Food Science
Wiley, Hoboken., 82(4), 1020-1027.
https://doi.org/10.1111/1750-3841.13672

Todorović V, Milenković M, Vidović B, Todorović ZB, Šobajić S. Correlation between Antimicrobial, Antioxidant Activity, and Polyphenols of Alkalized/Nonalkalized Cocoa Powders. in Journal of Food Science. 2017;82(4):1020-1027.
doi:10.1111/1750-3841.13672 .

Todorović, Vanja, Milenković, Marina, Vidović, Bojana, Todorović, Zoran B., Šobajić, Slađana, "Correlation between Antimicrobial, Antioxidant Activity, and Polyphenols of Alkalized/Nonalkalized Cocoa Powders" in Journal of Food Science, 82, no. 4 (2017):1020-1027,
https://doi.org/10.1111/1750-3841.13672 . .

TY  - JOUR
AU  - Troter, Dragan Z.
AU  - Todorović, Zoran B.
AU  - Đokić-Stojanović, Dušica R.
AU  - Đorđević, Biljana S.
AU  - Todorović, Vanja
AU  - Konstantinović, Sandra S.
AU  - Veljković, Vlada B.
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2851
AB  - This paper reports the physicochemical (density, dynamic viscosity, electrical conductivity and refractive index) and the thermodynamic (thermal expansion coefficient, molecular volume, lattice energy and heat capacity) properties of several choline chloride (ChCl) based deep eutectic solvents (DESs), with 1:2 mole ratio, respectively:ChCl:propylene glycol, ChCl:1,3-dimethyl-urea and ChCl:thiourea, at atmospheric pressure as a function of temperature over the range of 293.15-363.15 K. Their properties were also compared with those of some already characterized ChCl-based DESs, namely ChCl:ethylene glycol, ChCl:glycerol and ChCl:urea (1:2 mole ratio). Density, viscosity and refractive index of all DESs decrease with the increasing temperature while the electrical conductivity increases. Viscosity and conductivity of the tested DESs were fitted by both Arrhenius-type and Vogel-Tamman-Fulcher equations. The changes of molar enthalpy, entropy and Gibbs energy of activation, determined using the Eyring theory, demonstrated the interactional factor as predominant over the structural factor for all DES systems. The fractional Walden rule, used to correlate molar conductivity and viscosity, showed an excellent linear behaviour. It was shown that ChCl:propylene glycol DES had properties similar to ChCl:ethylene glycol and ChCl:glycerol DESs. However, the properties (density, viscosity and electrical conductivity) of ChCl:1,3-dimethylurea and ChCl::thiourea DESs were inferior to those of the ChCl:urea DES.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents
VL  - 82
IS  - 9
SP  - 1039
EP  - 1052
DO  - 10.2298/JSC170225065T
ER  - 

@article{
author = "Troter, Dragan Z. and Todorović, Zoran B. and Đokić-Stojanović, Dušica R. and Đorđević, Biljana S. and Todorović, Vanja and Konstantinović, Sandra S. and Veljković, Vlada B.",
year = "2017",
abstract = "This paper reports the physicochemical (density, dynamic viscosity, electrical conductivity and refractive index) and the thermodynamic (thermal expansion coefficient, molecular volume, lattice energy and heat capacity) properties of several choline chloride (ChCl) based deep eutectic solvents (DESs), with 1:2 mole ratio, respectively:ChCl:propylene glycol, ChCl:1,3-dimethyl-urea and ChCl:thiourea, at atmospheric pressure as a function of temperature over the range of 293.15-363.15 K. Their properties were also compared with those of some already characterized ChCl-based DESs, namely ChCl:ethylene glycol, ChCl:glycerol and ChCl:urea (1:2 mole ratio). Density, viscosity and refractive index of all DESs decrease with the increasing temperature while the electrical conductivity increases. Viscosity and conductivity of the tested DESs were fitted by both Arrhenius-type and Vogel-Tamman-Fulcher equations. The changes of molar enthalpy, entropy and Gibbs energy of activation, determined using the Eyring theory, demonstrated the interactional factor as predominant over the structural factor for all DES systems. The fractional Walden rule, used to correlate molar conductivity and viscosity, showed an excellent linear behaviour. It was shown that ChCl:propylene glycol DES had properties similar to ChCl:ethylene glycol and ChCl:glycerol DESs. However, the properties (density, viscosity and electrical conductivity) of ChCl:1,3-dimethylurea and ChCl::thiourea DESs were inferior to those of the ChCl:urea DES.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents",
volume = "82",
number = "9",
pages = "1039-1052",
doi = "10.2298/JSC170225065T"
}

Troter, D. Z., Todorović, Z. B., Đokić-Stojanović, D. R., Đorđević, B. S., Todorović, V., Konstantinović, S. S.,& Veljković, V. B.. (2017). The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 82(9), 1039-1052.
https://doi.org/10.2298/JSC170225065T

Troter DZ, Todorović ZB, Đokić-Stojanović DR, Đorđević BS, Todorović V, Konstantinović SS, Veljković VB. The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents. in Journal of the Serbian Chemical Society. 2017;82(9):1039-1052.
doi:10.2298/JSC170225065T .

Troter, Dragan Z., Todorović, Zoran B., Đokić-Stojanović, Dušica R., Đorđević, Biljana S., Todorović, Vanja, Konstantinović, Sandra S., Veljković, Vlada B., "The physicochemical and thermodynamic properties of the choline chloride-based deep eutectic solvents" in Journal of the Serbian Chemical Society, 82, no. 9 (2017):1039-1052,
https://doi.org/10.2298/JSC170225065T . .

TY  - JOUR
AU  - Đokić-Stojanović, Dušica R.
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Todorović, Vanja
AU  - Đorđević, Biljana S.
AU  - Stamenković, Olivera S.
AU  - Veljković, Vlada B.
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2531
AB  - A heterogeneous reaction process using propylene glycol (PEG), ethyl acetate and diethyl ether as cosolvents for the transesterification of sunflower oil with ethanol in the presence of calcium oxide as a catalyst has been developed. Significant results were obtained with propylene glycol as a cosolvent. Under determined reaction conditions (CaO concentration, based on the oil weight 1.3736 mol∙dm-3; temperature 70°C; and ethanol-to-oil molar ratio 12:1), the conversion of sunflower oil to fatty acid ethyl esters (FAEE) exceeded 98% after 120 min, which was 2 times faster than transesterification of sunflower oil without a cosolvent. After initially enhanced ethanolysis, after 180 min ethyl acetate and diethyl ether negatively influenced the reaction rate and the FAEE yield.
AB  - U radu je opisana heterogena transesterifikacija suncokretovog ulja sa etanolom i kalcijum oksidom kao katalizatorom u prisustvu polietilen glikola (PEG), etil acetata i dietil etra kao kosolvenata. Najpovoljniji rezultati su dobijeni sa polietilen glikolom kao kosolventom gde je, pod određenim reakcionim uslovima (koncentracija CaO, računata u odnosu na masu ulja 1.3736 mol∙dm-3, temperatura 70°C i molarni odnos etanol:ulje 12:1), konverzija suncokretovog ulja u etil estre masnih kiselina (FAEE) dostigla vrednost od 98% nakon 120 minuta, što je 2 puta brže od transesterifikacije suncokretovog ulja bez prisustva kosolventa. Etil acetat i dietil etar poboljšavaju reakciju etanolize na početku, ali, kako reakcija napreduje, posle 180 minuta, njihovo prisustvo u reakcionoj smeši negativno utiče na brzinu reakcije i prinos etil estrara masnih kiselina (FAEE).
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Advanced Technologies
T1  - Heterogeneously catalysed ethanolysis of sunflower oil in the presence of propylene glycol, ethyl acetate and diethyl ether as cosolvents
T1  - Heterogeno katalizovana etanoliza suncokretovog ulja u prisustvu polietilen glikola, etil acetata i dietil etra kao kosolvenata
VL  - 5
IS  - 1
SP  - 66
EP  - 72
DO  - 10.5937/savteh1601066D
ER  - 

@article{
author = "Đokić-Stojanović, Dušica R. and Todorović, Zoran B. and Troter, Dragan Z. and Todorović, Vanja and Đorđević, Biljana S. and Stamenković, Olivera S. and Veljković, Vlada B.",
year = "2016",
abstract = "A heterogeneous reaction process using propylene glycol (PEG), ethyl acetate and diethyl ether as cosolvents for the transesterification of sunflower oil with ethanol in the presence of calcium oxide as a catalyst has been developed. Significant results were obtained with propylene glycol as a cosolvent. Under determined reaction conditions (CaO concentration, based on the oil weight 1.3736 mol∙dm-3; temperature 70°C; and ethanol-to-oil molar ratio 12:1), the conversion of sunflower oil to fatty acid ethyl esters (FAEE) exceeded 98% after 120 min, which was 2 times faster than transesterification of sunflower oil without a cosolvent. After initially enhanced ethanolysis, after 180 min ethyl acetate and diethyl ether negatively influenced the reaction rate and the FAEE yield., U radu je opisana heterogena transesterifikacija suncokretovog ulja sa etanolom i kalcijum oksidom kao katalizatorom u prisustvu polietilen glikola (PEG), etil acetata i dietil etra kao kosolvenata. Najpovoljniji rezultati su dobijeni sa polietilen glikolom kao kosolventom gde je, pod određenim reakcionim uslovima (koncentracija CaO, računata u odnosu na masu ulja 1.3736 mol∙dm-3, temperatura 70°C i molarni odnos etanol:ulje 12:1), konverzija suncokretovog ulja u etil estre masnih kiselina (FAEE) dostigla vrednost od 98% nakon 120 minuta, što je 2 puta brže od transesterifikacije suncokretovog ulja bez prisustva kosolventa. Etil acetat i dietil etar poboljšavaju reakciju etanolize na početku, ali, kako reakcija napreduje, posle 180 minuta, njihovo prisustvo u reakcionoj smeši negativno utiče na brzinu reakcije i prinos etil estrara masnih kiselina (FAEE).",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Advanced Technologies",
title = "Heterogeneously catalysed ethanolysis of sunflower oil in the presence of propylene glycol, ethyl acetate and diethyl ether as cosolvents, Heterogeno katalizovana etanoliza suncokretovog ulja u prisustvu polietilen glikola, etil acetata i dietil etra kao kosolvenata",
volume = "5",
number = "1",
pages = "66-72",
doi = "10.5937/savteh1601066D"
}

Đokić-Stojanović, D. R., Todorović, Z. B., Troter, D. Z., Todorović, V., Đorđević, B. S., Stamenković, O. S.,& Veljković, V. B.. (2016). Heterogeneously catalysed ethanolysis of sunflower oil in the presence of propylene glycol, ethyl acetate and diethyl ether as cosolvents. in Advanced Technologies
Univerzitet u Nišu - Tehnološki fakultet, Leskovac., 5(1), 66-72.
https://doi.org/10.5937/savteh1601066D

Đokić-Stojanović DR, Todorović ZB, Troter DZ, Todorović V, Đorđević BS, Stamenković OS, Veljković VB. Heterogeneously catalysed ethanolysis of sunflower oil in the presence of propylene glycol, ethyl acetate and diethyl ether as cosolvents. in Advanced Technologies. 2016;5(1):66-72.
doi:10.5937/savteh1601066D .

Đokić-Stojanović, Dušica R., Todorović, Zoran B., Troter, Dragan Z., Todorović, Vanja, Đorđević, Biljana S., Stamenković, Olivera S., Veljković, Vlada B., "Heterogeneously catalysed ethanolysis of sunflower oil in the presence of propylene glycol, ethyl acetate and diethyl ether as cosolvents" in Advanced Technologies, 5, no. 1 (2016):66-72,
https://doi.org/10.5937/savteh1601066D . .

TY  - JOUR
AU  - Todorović, Vanja
AU  - Radojčić-Redovniković, Ivana
AU  - Todorović, Zoran B.
AU  - Janković, Goran
AU  - Dodevska, Margarita
AU  - Šobajić, Slađana
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2459
AB  - Different kinds of chocolates produced in Serbia were analyzed regarding total polyphenol, flavonoid and proanthocyanidin content using spectrophotometric methods. Flavan-3ols and methylxanthines in all samples were determined with RP-HPLC. DPPH, FRAP, ABTS and ORAC assays were applied for measuring antioxidant capacity. The average of all four antioxidant tests for each cocoa product was used for calculating antioxidant potency composite index (ACI). Obtained results for all four assays have shown that antioxidant capacity of analyzed chocolate/cocoa extracts followed cocoa, polyphenol, flavonoid, and proanthocyanidin contents. Although the addition of raspberries to dark chocolates had no significant influence on their total polyphenol, flavonoid and proanthocyanidin contents, statistical analysis showed that there was significant increase in the antioxidant capacity of dark chocolates with raspberry compared to plain dark chocolates (p = 0.007). Overall range for theobromine content varied from 5.5 to 22.3 mg/g depending on the product type, while the content of caffeine was 13-30 times lower in all analyzed cocoa products. In addition, correlation between antioxidant potency composite index and declared percentage of cocoa was high (R-2 = 0.798,p  lt  0.05) and indicated that declared cocoa content was a reliable indication for antioxidant capacity of chocolates produced in Serbia.
PB  - Academic Press Inc Elsevier Science, San Diego
T2  - Journal of Food Composition and Analysis
T1  - Polyphenols, methylxanthines, and antioxidant capacity of chocolates produced in Serbia
VL  - 41
SP  - 137
EP  - 143
DO  - 10.1016/j.jfca.2015.01.018
ER  - 

@article{
author = "Todorović, Vanja and Radojčić-Redovniković, Ivana and Todorović, Zoran B. and Janković, Goran and Dodevska, Margarita and Šobajić, Slađana",
year = "2015",
abstract = "Different kinds of chocolates produced in Serbia were analyzed regarding total polyphenol, flavonoid and proanthocyanidin content using spectrophotometric methods. Flavan-3ols and methylxanthines in all samples were determined with RP-HPLC. DPPH, FRAP, ABTS and ORAC assays were applied for measuring antioxidant capacity. The average of all four antioxidant tests for each cocoa product was used for calculating antioxidant potency composite index (ACI). Obtained results for all four assays have shown that antioxidant capacity of analyzed chocolate/cocoa extracts followed cocoa, polyphenol, flavonoid, and proanthocyanidin contents. Although the addition of raspberries to dark chocolates had no significant influence on their total polyphenol, flavonoid and proanthocyanidin contents, statistical analysis showed that there was significant increase in the antioxidant capacity of dark chocolates with raspberry compared to plain dark chocolates (p = 0.007). Overall range for theobromine content varied from 5.5 to 22.3 mg/g depending on the product type, while the content of caffeine was 13-30 times lower in all analyzed cocoa products. In addition, correlation between antioxidant potency composite index and declared percentage of cocoa was high (R-2 = 0.798,p  lt  0.05) and indicated that declared cocoa content was a reliable indication for antioxidant capacity of chocolates produced in Serbia.",
publisher = "Academic Press Inc Elsevier Science, San Diego",
journal = "Journal of Food Composition and Analysis",
title = "Polyphenols, methylxanthines, and antioxidant capacity of chocolates produced in Serbia",
volume = "41",
pages = "137-143",
doi = "10.1016/j.jfca.2015.01.018"
}

Todorović, V., Radojčić-Redovniković, I., Todorović, Z. B., Janković, G., Dodevska, M.,& Šobajić, S.. (2015). Polyphenols, methylxanthines, and antioxidant capacity of chocolates produced in Serbia. in Journal of Food Composition and Analysis
Academic Press Inc Elsevier Science, San Diego., 41, 137-143.
https://doi.org/10.1016/j.jfca.2015.01.018

Todorović V, Radojčić-Redovniković I, Todorović ZB, Janković G, Dodevska M, Šobajić S. Polyphenols, methylxanthines, and antioxidant capacity of chocolates produced in Serbia. in Journal of Food Composition and Analysis. 2015;41:137-143.
doi:10.1016/j.jfca.2015.01.018 .

Todorović, Vanja, Radojčić-Redovniković, Ivana, Todorović, Zoran B., Janković, Goran, Dodevska, Margarita, Šobajić, Slađana, "Polyphenols, methylxanthines, and antioxidant capacity of chocolates produced in Serbia" in Journal of Food Composition and Analysis, 41 (2015):137-143,
https://doi.org/10.1016/j.jfca.2015.01.018 . .

TY  - JOUR
AU  - Todorović, Zoran B.
AU  - Ranđelović, Ljiljana M.
AU  - Marjanović, Jelena Z.
AU  - Todorović, Vanja
AU  - Cakić, Milorad
AU  - Cvetković, Olga G.
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2119
AB  - In this study, the nature of the association of heavy metals (Fe, Co, Ni, Cu, Cd, Pb, Mn, and Zn) in sediments of the recent reservoir 'Barje' (Leskovac, Serbia) was investigated. The aim was to make the identification of their substrates, as well as to define the external factors (hydrological and anthropogenic affecting their distribution) which will contribute to a better understanding of the interactions that take place in the reservoir and predict the mobility of the investigated heavy metals. Chemical distribution of heavy metals was tested by using the method of sequential extraction and by data processing using statistical methods such as correlation, cluster and factor analysis. Based on the obtained results it can be concluded that major substrates of heavy metals are in the residual immobile fraction (Fe, Zn and Ni). Since the accumulation has a small organic substance content, Fe and Mn oxides are the most important binding substrates of heavy metals. Although it was determined that lead and cadmium are of the carbonate nature, their concentrations in the reservoir are negligible.
AB  - Cilj ovog rada je da se ispitivanjem prirode asocijacija teških metala (Fe, Co, Ni, Cu, Cd, Pb, Mn, Zn) izvrši identifikacija njihovih supstrata u akumulaciji 'Barje' (Leskovac, Srbija), kao i da se definišu spoljni faktori (hidrološki i antropogeni koji utiču na njihovu raspodelu) što će doprineti boljem razumevanju interakcija koje se odigravaju u akumulaciji i prognozu mobilnosti na osnovu toga. Hemijska raspodela teških metala ispitana je korišćenjem metode sekvencijalne ekstrakcije i obradom dobijenih podataka statističkim metodama kao što su korelaciona, klaster i faktorska analiza. Na osnovu dobijenih rezultata može se zaključiti da se većina teških metala nalazi u rezidualnoj nepokretnoj frakciji (Fe, Zn i Ni). Zato što je u akumulaciji mali sadržaj organske supstance oksidi gvožđa i mangana su najznačajniji supstrati za vezivanje teških metala. Iako je utvrđeno da je olovo i kadmijum karbonatne prirode njihove koncentracije u akumulaciji su zanemarljivo male.
PB  - Univerzitet u Nišu - Tehnološki fakultet, Leskovac
T2  - Savremene tehnologije
T1  - The assessment and distribution of heavy metals in surface sediments from the reservoir 'Barje': Serbia
T1  - Procena sadržaja i raspodele teških metala u površinskom sedimentu akumulacije 'Barje' - Srbija
VL  - 3
IS  - 2
SP  - 85
EP  - 95
DO  - 10.5937/savteh1402085T
ER  - 

@article{
author = "Todorović, Zoran B. and Ranđelović, Ljiljana M. and Marjanović, Jelena Z. and Todorović, Vanja and Cakić, Milorad and Cvetković, Olga G.",
year = "2014",
abstract = "In this study, the nature of the association of heavy metals (Fe, Co, Ni, Cu, Cd, Pb, Mn, and Zn) in sediments of the recent reservoir 'Barje' (Leskovac, Serbia) was investigated. The aim was to make the identification of their substrates, as well as to define the external factors (hydrological and anthropogenic affecting their distribution) which will contribute to a better understanding of the interactions that take place in the reservoir and predict the mobility of the investigated heavy metals. Chemical distribution of heavy metals was tested by using the method of sequential extraction and by data processing using statistical methods such as correlation, cluster and factor analysis. Based on the obtained results it can be concluded that major substrates of heavy metals are in the residual immobile fraction (Fe, Zn and Ni). Since the accumulation has a small organic substance content, Fe and Mn oxides are the most important binding substrates of heavy metals. Although it was determined that lead and cadmium are of the carbonate nature, their concentrations in the reservoir are negligible., Cilj ovog rada je da se ispitivanjem prirode asocijacija teških metala (Fe, Co, Ni, Cu, Cd, Pb, Mn, Zn) izvrši identifikacija njihovih supstrata u akumulaciji 'Barje' (Leskovac, Srbija), kao i da se definišu spoljni faktori (hidrološki i antropogeni koji utiču na njihovu raspodelu) što će doprineti boljem razumevanju interakcija koje se odigravaju u akumulaciji i prognozu mobilnosti na osnovu toga. Hemijska raspodela teških metala ispitana je korišćenjem metode sekvencijalne ekstrakcije i obradom dobijenih podataka statističkim metodama kao što su korelaciona, klaster i faktorska analiza. Na osnovu dobijenih rezultata može se zaključiti da se većina teških metala nalazi u rezidualnoj nepokretnoj frakciji (Fe, Zn i Ni). Zato što je u akumulaciji mali sadržaj organske supstance oksidi gvožđa i mangana su najznačajniji supstrati za vezivanje teških metala. Iako je utvrđeno da je olovo i kadmijum karbonatne prirode njihove koncentracije u akumulaciji su zanemarljivo male.",
publisher = "Univerzitet u Nišu - Tehnološki fakultet, Leskovac",
journal = "Savremene tehnologije",
title = "The assessment and distribution of heavy metals in surface sediments from the reservoir 'Barje': Serbia, Procena sadržaja i raspodele teških metala u površinskom sedimentu akumulacije 'Barje' - Srbija",
volume = "3",
number = "2",
pages = "85-95",
doi = "10.5937/savteh1402085T"
}

Todorović, Z. B., Ranđelović, L. M., Marjanović, J. Z., Todorović, V., Cakić, M.,& Cvetković, O. G.. (2014). The assessment and distribution of heavy metals in surface sediments from the reservoir 'Barje': Serbia. in Savremene tehnologije
Univerzitet u Nišu - Tehnološki fakultet, Leskovac., 3(2), 85-95.
https://doi.org/10.5937/savteh1402085T

Todorović ZB, Ranđelović LM, Marjanović JZ, Todorović V, Cakić M, Cvetković OG. The assessment and distribution of heavy metals in surface sediments from the reservoir 'Barje': Serbia. in Savremene tehnologije. 2014;3(2):85-95.
doi:10.5937/savteh1402085T .

Todorović, Zoran B., Ranđelović, Ljiljana M., Marjanović, Jelena Z., Todorović, Vanja, Cakić, Milorad, Cvetković, Olga G., "The assessment and distribution of heavy metals in surface sediments from the reservoir 'Barje': Serbia" in Savremene tehnologije, 3, no. 2 (2014):85-95,
https://doi.org/10.5937/savteh1402085T . .