TY  - JOUR
AU  - Salević-Jelić, Ana
AU  - Lević, Steva
AU  - Stojanović, Dušica
AU  - Jeremić, Sanja
AU  - Miletić, Dunja
AU  - Pantić, Milena
AU  - Pavlović, Vladimir
AU  - Sredović Ignjatović, Ivana
AU  - Uskoković, Petar
AU  - Nedović, Viktor
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5596
AB  - This study aimed to develop active, biodegradable materials for food packaging by incorporating sage extract (SE) within a zein-gelatin blend by electrospinning and solvent casting. The fabrication techniques, SE incorporation, and its content (5, 10% w/w) determined the materials’ properties. Electrospinning produced 0.36–0.53 mm thick, non-transparent fibrous mats (mean fiber diameter 1.12–1.36 µm). Solvent casting generated 0.34–0.41 mm thick, transparent continuous films. The analysis indicated the constituents’ compatibility, homogenous dispersion, and efficient SE incorporation without strong chemical interactions and phase separation. The solvent-cast films presented more ordered structures, higher mechanical resistance, elongation, and water vapor barrier performance than the electrospun mats. The SE-incorporating formulations showed phenolics’ delivery ability to food simulants influenced by structure, SE content, and media polarity. The electrospun mats expressed higher DPPH• radicals’ inhibition, while the solvent-cast films showed stronger Staphylococcus aureus and Escherichia coli growth inhibition, increased by SE incorporation. All formulations showed rapid complete bio-disintegration in compost (18–25 days).
PB  - Elsevier Ltd.
T2  - Food Packaging and Shelf Life
T1  - Biodegradable and active zein-gelatin-based electrospun mats and solvent-cast films incorporating sage extract: Formulation and comparative characterization
SP  - 101027
VL  - 35
DO  - 10.1016/j.fpsl.2023.101027
ER  - 

@article{
author = "Salević-Jelić, Ana and Lević, Steva and Stojanović, Dušica and Jeremić, Sanja and Miletić, Dunja and Pantić, Milena and Pavlović, Vladimir and Sredović Ignjatović, Ivana and Uskoković, Petar and Nedović, Viktor",
year = "2023",
abstract = "This study aimed to develop active, biodegradable materials for food packaging by incorporating sage extract (SE) within a zein-gelatin blend by electrospinning and solvent casting. The fabrication techniques, SE incorporation, and its content (5, 10% w/w) determined the materials’ properties. Electrospinning produced 0.36–0.53 mm thick, non-transparent fibrous mats (mean fiber diameter 1.12–1.36 µm). Solvent casting generated 0.34–0.41 mm thick, transparent continuous films. The analysis indicated the constituents’ compatibility, homogenous dispersion, and efficient SE incorporation without strong chemical interactions and phase separation. The solvent-cast films presented more ordered structures, higher mechanical resistance, elongation, and water vapor barrier performance than the electrospun mats. The SE-incorporating formulations showed phenolics’ delivery ability to food simulants influenced by structure, SE content, and media polarity. The electrospun mats expressed higher DPPH• radicals’ inhibition, while the solvent-cast films showed stronger Staphylococcus aureus and Escherichia coli growth inhibition, increased by SE incorporation. All formulations showed rapid complete bio-disintegration in compost (18–25 days).",
publisher = "Elsevier Ltd.",
journal = "Food Packaging and Shelf Life",
title = "Biodegradable and active zein-gelatin-based electrospun mats and solvent-cast films incorporating sage extract: Formulation and comparative characterization",
pages = "101027",
volume = "35",
doi = "10.1016/j.fpsl.2023.101027"
}

Salević-Jelić, A., Lević, S., Stojanović, D., Jeremić, S., Miletić, D., Pantić, M., Pavlović, V., Sredović Ignjatović, I., Uskoković, P.,& Nedović, V.. (2023). Biodegradable and active zein-gelatin-based electrospun mats and solvent-cast films incorporating sage extract: Formulation and comparative characterization. in Food Packaging and Shelf Life
Elsevier Ltd.., 35, 101027.
https://doi.org/10.1016/j.fpsl.2023.101027

Salević-Jelić A, Lević S, Stojanović D, Jeremić S, Miletić D, Pantić M, Pavlović V, Sredović Ignjatović I, Uskoković P, Nedović V. Biodegradable and active zein-gelatin-based electrospun mats and solvent-cast films incorporating sage extract: Formulation and comparative characterization. in Food Packaging and Shelf Life. 2023;35:101027.
doi:10.1016/j.fpsl.2023.101027 .

Salević-Jelić, Ana, Lević, Steva, Stojanović, Dušica, Jeremić, Sanja, Miletić, Dunja, Pantić, Milena, Pavlović, Vladimir, Sredović Ignjatović, Ivana, Uskoković, Petar, Nedović, Viktor, "Biodegradable and active zein-gelatin-based electrospun mats and solvent-cast films incorporating sage extract: Formulation and comparative characterization" in Food Packaging and Shelf Life, 35 (2023):101027,
https://doi.org/10.1016/j.fpsl.2023.101027 . .

TY  - JOUR
AU  - Lučić, Milica
AU  - Sredović Ignjatović, Ivana
AU  - Lević, Steva
AU  - Pećinar, Ilinka
AU  - Antić, Mališa
AU  - Đurđić, Slađana
AU  - Onjia, Antonije
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5080
AB  - The influence of extraction parameters on the ultrasonically assisted extraction (UAE) of K, Na, Ca, Mg, Zn, Cu, Fe, Mn, Cr, Se, Mo, Li, Al, B, Pb, Hg, Cd, As, and Ni was studied to determine the conditions when a minimum of essential and maximum of toxic elements is leached from peppers, depending on its ripening stage. The effect of process variables was investigated by using Box–Behnken design. Each essential element had a different optimal condition for minimal leaching, while the toxic elements were predominantly extracted with acetic acid solution as extractant. The highest correlation between extraction conditions and concentration of extracted elements was found for aqueous extracts of mature green pepper. The concentration of acetic acid highly influenced the leaching of elements and a strong correlation between the concentration of Al, B, Fe, and Mn, and the UAE experimental conditions were observed. Practical applications: This study investigates the leaching of minerals and heavy metals present in vegetables to the most commonly used media (water and acetic acid) during processing and canning. The data from this study may be useful for improving the quality of processed pepper products due to new information on how different parameters influence these losses (ripening stage of peppers, medium/solvent used for preparation, or storage, applied temperatures, time, mass to volume ratio). Essential elements are better preserved during the processing of intermediate breaker and mature red pepper compared to green mature fruits. Better retention of essential elements in the breaker and mature red pepper (that are mostly used in industrial processing) can be achieved by reducing the contact time with water, as well as mass to volume ratio. Leaching of toxic elements Al, Hg, and As can be improved with an acetic acid solution.
PB  - John Wiley and Sons Inc.
T2  - Journal of Food Processing and Preservation
T1  - Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design
IS  - 4
SP  - e16493
VL  - 46
DO  - 10.1111/jfpp.16493
ER  - 

@article{
author = "Lučić, Milica and Sredović Ignjatović, Ivana and Lević, Steva and Pećinar, Ilinka and Antić, Mališa and Đurđić, Slađana and Onjia, Antonije",
year = "2022",
abstract = "The influence of extraction parameters on the ultrasonically assisted extraction (UAE) of K, Na, Ca, Mg, Zn, Cu, Fe, Mn, Cr, Se, Mo, Li, Al, B, Pb, Hg, Cd, As, and Ni was studied to determine the conditions when a minimum of essential and maximum of toxic elements is leached from peppers, depending on its ripening stage. The effect of process variables was investigated by using Box–Behnken design. Each essential element had a different optimal condition for minimal leaching, while the toxic elements were predominantly extracted with acetic acid solution as extractant. The highest correlation between extraction conditions and concentration of extracted elements was found for aqueous extracts of mature green pepper. The concentration of acetic acid highly influenced the leaching of elements and a strong correlation between the concentration of Al, B, Fe, and Mn, and the UAE experimental conditions were observed. Practical applications: This study investigates the leaching of minerals and heavy metals present in vegetables to the most commonly used media (water and acetic acid) during processing and canning. The data from this study may be useful for improving the quality of processed pepper products due to new information on how different parameters influence these losses (ripening stage of peppers, medium/solvent used for preparation, or storage, applied temperatures, time, mass to volume ratio). Essential elements are better preserved during the processing of intermediate breaker and mature red pepper compared to green mature fruits. Better retention of essential elements in the breaker and mature red pepper (that are mostly used in industrial processing) can be achieved by reducing the contact time with water, as well as mass to volume ratio. Leaching of toxic elements Al, Hg, and As can be improved with an acetic acid solution.",
publisher = "John Wiley and Sons Inc.",
journal = "Journal of Food Processing and Preservation",
title = "Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design",
number = "4",
pages = "e16493",
volume = "46",
doi = "10.1111/jfpp.16493"
}

Lučić, M., Sredović Ignjatović, I., Lević, S., Pećinar, I., Antić, M., Đurđić, S.,& Onjia, A.. (2022). Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design. in Journal of Food Processing and Preservation
John Wiley and Sons Inc.., 46(4), e16493.
https://doi.org/10.1111/jfpp.16493

Lučić M, Sredović Ignjatović I, Lević S, Pećinar I, Antić M, Đurđić S, Onjia A. Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design. in Journal of Food Processing and Preservation. 2022;46(4):e16493.
doi:10.1111/jfpp.16493 .

Lučić, Milica, Sredović Ignjatović, Ivana, Lević, Steva, Pećinar, Ilinka, Antić, Mališa, Đurđić, Slađana, Onjia, Antonije, "Ultrasound-assisted extraction of essential and toxic elements from pepper in different ripening stages using Box–Behnken design" in Journal of Food Processing and Preservation, 46, no. 4 (2022):e16493,
https://doi.org/10.1111/jfpp.16493 . .

TY  - JOUR
AU  - Tasić, Aleksandra M.
AU  - Sredović-Ignjatović, Ivana
AU  - Ignjatović, Ljubiša M.
AU  - Andjelković, Ivan B.
AU  - Antić, Mališa
AU  - Rajaković, Ljubinka V.
PY  - 2016
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5831
AB  - This paper presents the extraction of major and trace elements from a coal sample, in deionized water, by using three different extraction techniques. Rotary mixing and ultrasonic extraction were examined for different extraction times, while the microwave-assisted extraction was performed at different temperatures. Metal concentrations (Na, K, Ca, Mg, Al, Fe, Mn, Be, Cd, Co, Cr, Hg, As, Ni, Se, Sb and Pb) in solution were determined employing inductively coupled plasma atomic emission spectrometry; whereas the results obtained for Na, K, Ca and Mg were compared employing ion chromatography. Comparing the rotary-and ultrasonic-assisted extractions, it was shown that the former technique was more efficient for the determination of Fe, Na and Pb, whereas the latter one proved more efficient for the determination of Co and Cr ions. Microwave-assisted extraction was shown to be the most efficient method for all the tested elements in coal. In addition, sequential extraction of the elements was realized using microwave digestion. The results of the sequential extraction experiments indicated associations of investigated elements with a mineral phase and organic matrix. Sequential extraction provided information on possible leaching of As, Cd, Co, Cr, Ni, Pb, Fe and Mn under environmental conditions.
PB  - Srpsko hemijsko društvo, Beograd
T2  - Journal of the Serbian Chemical Society
T1  - Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography
EP  - 417
IS  - 4
SP  - 403
VL  - 81
DO  - 10.2298/JSC150429078T
ER  - 

@article{
author = "Tasić, Aleksandra M. and Sredović-Ignjatović, Ivana and Ignjatović, Ljubiša M. and Andjelković, Ivan B. and Antić, Mališa and Rajaković, Ljubinka V.",
year = "2016",
abstract = "This paper presents the extraction of major and trace elements from a coal sample, in deionized water, by using three different extraction techniques. Rotary mixing and ultrasonic extraction were examined for different extraction times, while the microwave-assisted extraction was performed at different temperatures. Metal concentrations (Na, K, Ca, Mg, Al, Fe, Mn, Be, Cd, Co, Cr, Hg, As, Ni, Se, Sb and Pb) in solution were determined employing inductively coupled plasma atomic emission spectrometry; whereas the results obtained for Na, K, Ca and Mg were compared employing ion chromatography. Comparing the rotary-and ultrasonic-assisted extractions, it was shown that the former technique was more efficient for the determination of Fe, Na and Pb, whereas the latter one proved more efficient for the determination of Co and Cr ions. Microwave-assisted extraction was shown to be the most efficient method for all the tested elements in coal. In addition, sequential extraction of the elements was realized using microwave digestion. The results of the sequential extraction experiments indicated associations of investigated elements with a mineral phase and organic matrix. Sequential extraction provided information on possible leaching of As, Cd, Co, Cr, Ni, Pb, Fe and Mn under environmental conditions.",
publisher = "Srpsko hemijsko društvo, Beograd",
journal = "Journal of the Serbian Chemical Society",
title = "Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography",
pages = "417-403",
number = "4",
volume = "81",
doi = "10.2298/JSC150429078T"
}

Tasić, A. M., Sredović-Ignjatović, I., Ignjatović, L. M., Andjelković, I. B., Antić, M.,& Rajaković, L. V.. (2016). Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography. in Journal of the Serbian Chemical Society
Srpsko hemijsko društvo, Beograd., 81(4), 403-417.
https://doi.org/10.2298/JSC150429078T

Tasić AM, Sredović-Ignjatović I, Ignjatović LM, Andjelković IB, Antić M, Rajaković LV. Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography. in Journal of the Serbian Chemical Society. 2016;81(4):403-417.
doi:10.2298/JSC150429078T .

Tasić, Aleksandra M., Sredović-Ignjatović, Ivana, Ignjatović, Ljubiša M., Andjelković, Ivan B., Antić, Mališa, Rajaković, Ljubinka V., "Investigation of different extraction procedures for the determination of major and trace elements in coal by ICP-AES and ion chromatography" in Journal of the Serbian Chemical Society, 81, no. 4 (2016):403-417,
https://doi.org/10.2298/JSC150429078T . .

TY  - JOUR
AU  - Sredović-Ignjatović, Ivana D.
AU  - Onjia, Antonije
AU  - Ignjatović, Ljubiša M.
AU  - Todorović, Žaklina
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3150
AB  - Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.
PB  - Taylor & Francis Inc, Philadelphia
T2  - Analytical Letters
T1  - Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography
EP  - 2612
IS  - 16
SP  - 2597
VL  - 48
DO  - 10.1080/00032719.2015.1041029
ER  - 

@article{
author = "Sredović-Ignjatović, Ivana D. and Onjia, Antonije and Ignjatović, Ljubiša M. and Todorović, Žaklina and Rajaković, Ljubinka V.",
year = "2015",
abstract = "Determination of total halogens in coal was investigated with oxygen bomb combustion followed by ion chromatography. Experimental parameters were optimized by fractional factorial design and response surface methodology. Fractional factorial design was employed in screening experiments to evaluate the influence of the oxygen pressure, catalyst, absorption solution, reduction reagent, bomb cooling time, and a combustion aid on the combustion of coal in an oxygen bomb. Response surface methodology was conducted to further refine the results obtained by fractional factorial design and to define parameters for the procedure. The accuracy and precision of combustion with ion chromatography were evaluated by the use of two certified reference materials and by fortified in-house coal standards. The limits of detection and quantification for total halogens were 0.84 and 2.80 milligrams per kilogram, respectively, for 500 milligram samples. Ion chromatography provided relative standard deviations less than 4 percent, recoveries exceeding 95 percent, and was convenient. This method is recommended for routine determination of total halogens in coal because of its reliability.",
publisher = "Taylor & Francis Inc, Philadelphia",
journal = "Analytical Letters",
title = "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography",
pages = "2612-2597",
number = "16",
volume = "48",
doi = "10.1080/00032719.2015.1041029"
}

Sredović-Ignjatović, I. D., Onjia, A., Ignjatović, L. M., Todorović, Ž.,& Rajaković, L. V.. (2015). Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters
Taylor & Francis Inc, Philadelphia., 48(16), 2597-2612.
https://doi.org/10.1080/00032719.2015.1041029

Sredović-Ignjatović ID, Onjia A, Ignjatović LM, Todorović Ž, Rajaković LV. Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography. in Analytical Letters. 2015;48(16):2597-2612.
doi:10.1080/00032719.2015.1041029 .

Sredović-Ignjatović, Ivana D., Onjia, Antonije, Ignjatović, Ljubiša M., Todorović, Žaklina, Rajaković, Ljubinka V., "Experimental Design Optimization of the Determination of Total Halogens in Coal by Combustion-Ion Chromatography" in Analytical Letters, 48, no. 16 (2015):2597-2612,
https://doi.org/10.1080/00032719.2015.1041029 . .