TY  - JOUR
AU  - Pavlović, Marija
AU  - Šokarda Slavić, Marinela
AU  - Ristović, Marina
AU  - Stojanović, Sanja
AU  - Margetić, Aleksandra
AU  - Momčilović, Miloš
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11384
AB  - The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.
T2  - Letters in Applied Microbiology
T1  - Optimization of solid-state fermentation for enhanced production of pectinolytic complex by                    Aspergillus tubingensis                    FAT43 and its application in fruit juice processing
VL  - 76
IS  - 8
DO  - 10.1093/lambio/ovad083
ER  - 

@article{
author = "Pavlović, Marija and Šokarda Slavić, Marinela and Ristović, Marina and Stojanović, Sanja and Margetić, Aleksandra and Momčilović, Miloš and Vujčić, Zoran",
year = "2023",
abstract = "The main goal of this study was to examine the efficiency of a newly isolated fungus from quince, Aspergillus tubingensis FAT43, to produce the pectinolytic complex using agricultural and industrial waste as the substrate for solid state fermentation. Sugar beet pulp was the most effective substrate inducer of pectinolytic complex synthesis out of all the waste residues examined. For endo-pectinolytic and total pectinolytic activity, respectively, statistical optimization using Placked-Burman Design and Optimal (Custom) Design increased production by 2.22 and 2.15-fold, respectively. Liquification, clarification, and an increase in the amount of reducing sugar in fruit juices (apple, banana, apricot, orange, and quince) processed with pectinolytic complex were identified. Enzymatic pre-treatment considerably increases yield (14%–22%) and clarification (90%). After enzymatic treatment, the best liquefaction was observed in orange juice, whereas the best clarification was obtained in apricot juice. Additionally, the pectinolytic treatment of apricot juice resulted in the highest increase in reducing sugar concentration (11%) compared to all other enzymatically treated juices. Optimizing the production of a highly active pectinolytic complex and its efficient utilization in the processing of fruit juices, including the generation of an increasing amount of waste, are the significant outcomes of this research.",
journal = "Letters in Applied Microbiology",
title = "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by                    Aspergillus tubingensis                    FAT43 and its application in fruit juice processing",
volume = "76",
number = "8",
doi = "10.1093/lambio/ovad083"
}

Pavlović, M., Šokarda Slavić, M., Ristović, M., Stojanović, S., Margetić, A., Momčilović, M.,& Vujčić, Z.. (2023). Optimization of solid-state fermentation for enhanced production of pectinolytic complex by                    Aspergillus tubingensis                    FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology, 76(8).
https://doi.org/10.1093/lambio/ovad083

Pavlović M, Šokarda Slavić M, Ristović M, Stojanović S, Margetić A, Momčilović M, Vujčić Z. Optimization of solid-state fermentation for enhanced production of pectinolytic complex by                    Aspergillus tubingensis                    FAT43 and its application in fruit juice processing. in Letters in Applied Microbiology. 2023;76(8).
doi:10.1093/lambio/ovad083 .

Pavlović, Marija, Šokarda Slavić, Marinela, Ristović, Marina, Stojanović, Sanja, Margetić, Aleksandra, Momčilović, Miloš, Vujčić, Zoran, "Optimization of solid-state fermentation for enhanced production of pectinolytic complex by                    Aspergillus tubingensis                    FAT43 and its application in fruit juice processing" in Letters in Applied Microbiology, 76, no. 8 (2023),
https://doi.org/10.1093/lambio/ovad083 . .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Kojić, Milan
AU  - Margetić, Aleksandra
AU  - Ristović, Marina
AU  - Pavlović, Marija
AU  - Nikolić, Stefan
AU  - Vujčić, Zoran
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11438
AB  - The combination of β‐oligosaccharides from enzymatically hydrolysed barley β‐glucan has attracted interest recently due to its positive effects on human health. This study aimed to assess the impact of the endo‐β‐1,3‐1,4‐glucanase enzyme from Bacillus subtilis 168 on improving the nutritional and bioactive properties of barley β‐glucan. A new procedure for the isolation of β‐glucan was developed, at a lower temperature (45 °C), enabling purity from starch contamination, without affecting the yield (6 g β‐glucan from 100 g of barley flour). The endo‐β‐1,3‐1,4‐glucanase is cloned into E. coli pQE_Ek enables the high production and purification (82% yield, 1.8 mg mL −1 and 440 U mg −1 ) of an enzyme identical to the natural one (25.5 kDa). The enzymatic reaction showed high efficiency of β‐glucan degradation by recombinant enzyme, giving a mixture of products (of which 3‐O‐β‐cellobiosyl‐D‐glucose and 3‐O‐β‐cellotriosyl‐D‐glucose are the most abundant), the reduction of viscosity (17%) and increase in antioxidant capacities by 15.2%, 30.9% and 44.0% assessed by ABTS, DPPH and ORAC, respectively. These results indicate the possible application of endo‐β‐1,3‐1,4‐glucanase enzyme in improving the properties of barley β‐glucan used as functional foods.
T2  - International Journal of Food Science & Technology
T1  - Improvement of nutritional and bioactive properties of barley β‐glucan‐based food products using Bacillus subtilis 168 endo‐β‐1,3‐1,4‐glucanase
DO  - 10.1111/ijfs.16647
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Kojić, Milan and Margetić, Aleksandra and Ristović, Marina and Pavlović, Marija and Nikolić, Stefan and Vujčić, Zoran",
year = "2023",
abstract = "The combination of β‐oligosaccharides from enzymatically hydrolysed barley β‐glucan has attracted interest recently due to its positive effects on human health. This study aimed to assess the impact of the endo‐β‐1,3‐1,4‐glucanase enzyme from Bacillus subtilis 168 on improving the nutritional and bioactive properties of barley β‐glucan. A new procedure for the isolation of β‐glucan was developed, at a lower temperature (45 °C), enabling purity from starch contamination, without affecting the yield (6 g β‐glucan from 100 g of barley flour). The endo‐β‐1,3‐1,4‐glucanase is cloned into E. coli pQE_Ek enables the high production and purification (82% yield, 1.8 mg mL −1 and 440 U mg −1 ) of an enzyme identical to the natural one (25.5 kDa). The enzymatic reaction showed high efficiency of β‐glucan degradation by recombinant enzyme, giving a mixture of products (of which 3‐O‐β‐cellobiosyl‐D‐glucose and 3‐O‐β‐cellotriosyl‐D‐glucose are the most abundant), the reduction of viscosity (17%) and increase in antioxidant capacities by 15.2%, 30.9% and 44.0% assessed by ABTS, DPPH and ORAC, respectively. These results indicate the possible application of endo‐β‐1,3‐1,4‐glucanase enzyme in improving the properties of barley β‐glucan used as functional foods.",
journal = "International Journal of Food Science & Technology",
title = "Improvement of nutritional and bioactive properties of barley β‐glucan‐based food products using Bacillus subtilis 168 endo‐β‐1,3‐1,4‐glucanase",
doi = "10.1111/ijfs.16647"
}

Šokarda Slavić, M., Kojić, M., Margetić, A., Ristović, M., Pavlović, M., Nikolić, S.,& Vujčić, Z.. (2023). Improvement of nutritional and bioactive properties of barley β‐glucan‐based food products using Bacillus subtilis 168 endo‐β‐1,3‐1,4‐glucanase. in International Journal of Food Science & Technology.
https://doi.org/10.1111/ijfs.16647

Šokarda Slavić M, Kojić M, Margetić A, Ristović M, Pavlović M, Nikolić S, Vujčić Z. Improvement of nutritional and bioactive properties of barley β‐glucan‐based food products using Bacillus subtilis 168 endo‐β‐1,3‐1,4‐glucanase. in International Journal of Food Science & Technology. 2023;.
doi:10.1111/ijfs.16647 .

Šokarda Slavić, Marinela, Kojić, Milan, Margetić, Aleksandra, Ristović, Marina, Pavlović, Marija, Nikolić, Stefan, Vujčić, Zoran, "Improvement of nutritional and bioactive properties of barley β‐glucan‐based food products using Bacillus subtilis 168 endo‐β‐1,3‐1,4‐glucanase" in International Journal of Food Science & Technology (2023),
https://doi.org/10.1111/ijfs.16647 . .

TY  - JOUR
AU  - Šokarda Slavić, Marinela
AU  - Ralić, Vanja
AU  - Nastasijević, Branislav
AU  - Matijević, Milica
AU  - Vujčić, Zoran
AU  - Margetić, Aleksandra
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11988
AB  - Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone.
AB  - Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.
T2  - Journal of the Serbian Chemical Society
T1  - A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain
T1  - Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B
VL  - 88
IS  - 10
SP  - 985
EP  - 997
DO  - 10.2298/JSC221116011S
ER  - 

@article{
author = "Šokarda Slavić, Marinela and Ralić, Vanja and Nastasijević, Branislav and Matijević, Milica and Vujčić, Zoran and Margetić, Aleksandra",
year = "2023",
abstract = "Poly(γ-glutamic acid) (PGA), naturally produced by Bacillus species, is a biodegradable, non-toxic, biocompatible, and non-immunogenic negatively charged polymer. Due to its properties, it has found various applications in the food, cosmetic and pharmaceutical industries. In this work, Bacillus subtilis 17B was selected as the best PGA producer among fifty wild-types Bacillus strains tested and characterized as a glutamate-independent producer. The production of PGA by the newly identified strain was optimized and increased tenfold using the Box-Behnken experimental design. The purity of PGA after recovery and purification from the fermentation broth was confirmed by SDS-PAGE followed by Methylene Blue staining. PGA was characterized by ESI MS and used for the preparation of a new nanocomposite with TiO2. The synthesis of PGA/TiO2 nanocomposite, its structural analysis, and cytotoxic effect on the cervical cancer cell line (HeLa cell) was investigated to determine the potential anti-cancer usage of this newly prepared material. Encouraging, PGA/TiO2 nanocomposite showed an increased cytotoxic effect compared to TiO2 alone., Поли(γ-глутаминска киселина) (ПГK), коју производе бактерије рода Bacillus, је биоразградив, нетоксичан, биокомпатибилан и неимуноген негативно наелектрисани полимер. Због својих својстава нашао је разноврсну примену у прехрамбеној, козметичкој и фармацеутској индустрији. У овом раду, Bacillus ѕubtilis 17Б је изабран као најбољи ПГК продуцер међу педесетак тестираних природних изолата бактерија из овог рода и окарактерисан као глутамат независтан продуцер. Производња ПГК овим новоидентификованим сојем је оптимизована и десетоструко увећана коришћењем Box-Behnken експерименталног дизајна. Чистоћа ПГК након изоловања и пречишћавања из ферметационе течности је потврђена електрофорезом (SDS-PAGE) након бојења метиленским плавим. ПГК је окарактерисана масеном спекроскопијом (ESI MS) и коришћена за добијање новог нанокомпозита са ТiО2. Синтеза ПГК/ТiО2 нанокомпозита, његова структурна анализа и цитотоксични ефекат на ћелијску линију рака грлића материце (HeLa ћелије) је испитан да би се утврдила потенцијална употреба овог новодобијеног материјала у борби против ћелија рака. Нанокомпозит ПГК/ТiО2показао је повећан цитотоксични ефекат на поменуте ћелије рака у поређењу са самим ТiО2.",
journal = "Journal of the Serbian Chemical Society",
title = "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain, Нови ПГК/TiO2 нанокомпозит добијен од поли(γ -глутаминске киселине) из новоизолованог соја bacillus subtilis 17B",
volume = "88",
number = "10",
pages = "985-997",
doi = "10.2298/JSC221116011S"
}

Šokarda Slavić, M., Ralić, V., Nastasijević, B., Matijević, M., Vujčić, Z.,& Margetić, A.. (2023). A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society, 88(10), 985-997.
https://doi.org/10.2298/JSC221116011S

Šokarda Slavić M, Ralić V, Nastasijević B, Matijević M, Vujčić Z, Margetić A. A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain. in Journal of the Serbian Chemical Society. 2023;88(10):985-997.
doi:10.2298/JSC221116011S .

Šokarda Slavić, Marinela, Ralić, Vanja, Nastasijević, Branislav, Matijević, Milica, Vujčić, Zoran, Margetić, Aleksandra, "A novel PGA/TiO2 nanocomposite prepared with poly(γ-glutamic acid) from the newly isolated Bacillus subtilis 17B strain" in Journal of the Serbian Chemical Society, 88, no. 10 (2023):985-997,
https://doi.org/10.2298/JSC221116011S . .