TY  - JOUR
AU  - Avdalović, Jelena
AU  - Miletić, Srđan
AU  - Božović, Olga
AU  - Šolević Knudsen, Tatjana
AU  - Stanković, Dalibor M.
AU  - Lugonja, Nikoleta
AU  - Spasić, Snežana D.
AU  - Joksimović, Kristina
AU  - Dragičević, Igor
AU  - Vrvić, Miroslav M.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9895
AB  - The aim of this study was to investigate the creation of humic substances during biodegradation of heavy residual fuel oil, because there are indications that substances similar to humic substances are generated during biodegradation of polycyclic aromatic hydrocarbons. In the study, which lasted for 110 days, biodegradation of heavy residual fuel oil was carried out in a layer of artificial soil substrate. The initial concentration of the total petroleum hydrocarbon in the prepared artificial soil substrate (biopile) was 23.1 g kg-1 dry weight (d.w.). At the end of the process, the total petroleum hydrocarbons were reduced to 8.1 g kg-1 d.w. in the inoculated biopile, while the content of humic acids increased during bioremediation from 3.15 g kg-1 d.w. to 4.95 g kg-1 d.w. The humic acids extracted from biopile during the biodegradation process were characterized by various chemical techniques (elemental analysis, spectrofluorimetric analysis, electrochemical measurements, and size exclusion chromatography). The results showed that levels of C, H and the H/C ratio decreased as the biodegradation process progressed. This indicated that humic acids aromatization process took place and this was confirmed by the spectrofluorimetric analysis. The increase of oxygen percentage and the O/C ratio in the humic acids after the biodegradation treatment indicated an increase in functional oxygen groups. Additional analyses of humic acids from the inoculated biopile showed that they were transformed during the bioremediation process. They had greater redox and buffering capacities and a larger portion of the fractions had high molecular mass. Also, the humification parameters (the CHAs/CFAs ratio and CHAs/Corg ratio) increased during the biodegradation. This is one of the few studies that describes the generation of humic substances during the biodegradation of oil compounds.
T2  - Science of the Total Environment
T1  - Study on the assessment of humification processes during biodegradation of heavy residual fuel oil
VL  - 797
SP  - 149099
DO  - 10.1016/j.scitotenv.2021.149099
ER  - 

@article{
author = "Avdalović, Jelena and Miletić, Srđan and Božović, Olga and Šolević Knudsen, Tatjana and Stanković, Dalibor M. and Lugonja, Nikoleta and Spasić, Snežana D. and Joksimović, Kristina and Dragičević, Igor and Vrvić, Miroslav M.",
year = "2021",
abstract = "The aim of this study was to investigate the creation of humic substances during biodegradation of heavy residual fuel oil, because there are indications that substances similar to humic substances are generated during biodegradation of polycyclic aromatic hydrocarbons. In the study, which lasted for 110 days, biodegradation of heavy residual fuel oil was carried out in a layer of artificial soil substrate. The initial concentration of the total petroleum hydrocarbon in the prepared artificial soil substrate (biopile) was 23.1 g kg-1 dry weight (d.w.). At the end of the process, the total petroleum hydrocarbons were reduced to 8.1 g kg-1 d.w. in the inoculated biopile, while the content of humic acids increased during bioremediation from 3.15 g kg-1 d.w. to 4.95 g kg-1 d.w. The humic acids extracted from biopile during the biodegradation process were characterized by various chemical techniques (elemental analysis, spectrofluorimetric analysis, electrochemical measurements, and size exclusion chromatography). The results showed that levels of C, H and the H/C ratio decreased as the biodegradation process progressed. This indicated that humic acids aromatization process took place and this was confirmed by the spectrofluorimetric analysis. The increase of oxygen percentage and the O/C ratio in the humic acids after the biodegradation treatment indicated an increase in functional oxygen groups. Additional analyses of humic acids from the inoculated biopile showed that they were transformed during the bioremediation process. They had greater redox and buffering capacities and a larger portion of the fractions had high molecular mass. Also, the humification parameters (the CHAs/CFAs ratio and CHAs/Corg ratio) increased during the biodegradation. This is one of the few studies that describes the generation of humic substances during the biodegradation of oil compounds.",
journal = "Science of the Total Environment",
title = "Study on the assessment of humification processes during biodegradation of heavy residual fuel oil",
volume = "797",
pages = "149099",
doi = "10.1016/j.scitotenv.2021.149099"
}

Avdalović, J., Miletić, S., Božović, O., Šolević Knudsen, T., Stanković, D. M., Lugonja, N., Spasić, S. D., Joksimović, K., Dragičević, I.,& Vrvić, M. M.. (2021). Study on the assessment of humification processes during biodegradation of heavy residual fuel oil. in Science of the Total Environment, 797, 149099.
https://doi.org/10.1016/j.scitotenv.2021.149099

Avdalović J, Miletić S, Božović O, Šolević Knudsen T, Stanković DM, Lugonja N, Spasić SD, Joksimović K, Dragičević I, Vrvić MM. Study on the assessment of humification processes during biodegradation of heavy residual fuel oil. in Science of the Total Environment. 2021;797:149099.
doi:10.1016/j.scitotenv.2021.149099 .

Avdalović, Jelena, Miletić, Srđan, Božović, Olga, Šolević Knudsen, Tatjana, Stanković, Dalibor M., Lugonja, Nikoleta, Spasić, Snežana D., Joksimović, Kristina, Dragičević, Igor, Vrvić, Miroslav M., "Study on the assessment of humification processes during biodegradation of heavy residual fuel oil" in Science of the Total Environment, 797 (2021):149099,
https://doi.org/10.1016/j.scitotenv.2021.149099 . .

TY  - JOUR
AU  - Lugonja, Nikoleta
AU  - Lončarević, Branka
AU  - Stanković, Dalibor M.
AU  - Marinković, Vesna S.
AU  - Lješević, Marija
AU  - Spasić, Snežana D.
AU  - Beškoski, Vladimir P.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9853
AB  - Pectin is a complex polysaccharide, present in fresh and processed food as an additive, which also serves as an important source of fiber. In this work, the aim was to investigate in-vitro application of apple pectin as a possible antimicrobial, antioxidant and prebiotic agent for growth of bacteria selected from human milk and infant feces, as well as standard strains Lactobacillus rhamnosus and Bifidobacterium bifidum.METHODS : All the bacteria isolated from the milk of mothers of preterm and term-born infants, bacteria from infant feces and standard strains were tested for fermentation of apple pectin as the main carbohydrate in selective broth media.RESULTS: An increase in the growth of bacteria Bifidobacteria, Lactobacillus, and a consortium of bacteria selected from human milk and infant feces was noticed after pectin fermentation. It was found that pectin has a positive impact on the increase of the antioxidant capacity in all the tested samples. A high correlation was achieved, comparing electrochemical with spectrophotometric methods. Antimicrobial tests showed that pectin and fermentation products have slight or no influence at all on the growth of standard strains of Escherichia coli, Staphylococcus aureus and Candida albicans.CONCLUSIONS: The results showed the importance of pectin as an antioxidant and its impact on the development of potential probiotic microbiota in mothers and infants. The study indicated a new potential application of pectin as a supplement in infant food.
T2  - Minerva Biotechnology and Biomolecular Research
T1  - Investigation of pectin as a prebiotic, antioxidant and antimicrobial agent for the bacteria selected from human milk of mothers of premature infants
VL  - 33
IS  - 2
SP  - 86
EP  - 92
DO  - 10.23736/S2724-542X.21.02760-9
ER  - 

@article{
author = "Lugonja, Nikoleta and Lončarević, Branka and Stanković, Dalibor M. and Marinković, Vesna S. and Lješević, Marija and Spasić, Snežana D. and Beškoski, Vladimir P.",
year = "2021",
abstract = "Pectin is a complex polysaccharide, present in fresh and processed food as an additive, which also serves as an important source of fiber. In this work, the aim was to investigate in-vitro application of apple pectin as a possible antimicrobial, antioxidant and prebiotic agent for growth of bacteria selected from human milk and infant feces, as well as standard strains Lactobacillus rhamnosus and Bifidobacterium bifidum.METHODS : All the bacteria isolated from the milk of mothers of preterm and term-born infants, bacteria from infant feces and standard strains were tested for fermentation of apple pectin as the main carbohydrate in selective broth media.RESULTS: An increase in the growth of bacteria Bifidobacteria, Lactobacillus, and a consortium of bacteria selected from human milk and infant feces was noticed after pectin fermentation. It was found that pectin has a positive impact on the increase of the antioxidant capacity in all the tested samples. A high correlation was achieved, comparing electrochemical with spectrophotometric methods. Antimicrobial tests showed that pectin and fermentation products have slight or no influence at all on the growth of standard strains of Escherichia coli, Staphylococcus aureus and Candida albicans.CONCLUSIONS: The results showed the importance of pectin as an antioxidant and its impact on the development of potential probiotic microbiota in mothers and infants. The study indicated a new potential application of pectin as a supplement in infant food.",
journal = "Minerva Biotechnology and Biomolecular Research",
title = "Investigation of pectin as a prebiotic, antioxidant and antimicrobial agent for the bacteria selected from human milk of mothers of premature infants",
volume = "33",
number = "2",
pages = "86-92",
doi = "10.23736/S2724-542X.21.02760-9"
}

Lugonja, N., Lončarević, B., Stanković, D. M., Marinković, V. S., Lješević, M., Spasić, S. D.,& Beškoski, V. P.. (2021). Investigation of pectin as a prebiotic, antioxidant and antimicrobial agent for the bacteria selected from human milk of mothers of premature infants. in Minerva Biotechnology and Biomolecular Research, 33(2), 86-92.
https://doi.org/10.23736/S2724-542X.21.02760-9

Lugonja N, Lončarević B, Stanković DM, Marinković VS, Lješević M, Spasić SD, Beškoski VP. Investigation of pectin as a prebiotic, antioxidant and antimicrobial agent for the bacteria selected from human milk of mothers of premature infants. in Minerva Biotechnology and Biomolecular Research. 2021;33(2):86-92.
doi:10.23736/S2724-542X.21.02760-9 .

Lugonja, Nikoleta, Lončarević, Branka, Stanković, Dalibor M., Marinković, Vesna S., Lješević, Marija, Spasić, Snežana D., Beškoski, Vladimir P., "Investigation of pectin as a prebiotic, antioxidant and antimicrobial agent for the bacteria selected from human milk of mothers of premature infants" in Minerva Biotechnology and Biomolecular Research, 33, no. 2 (2021):86-92,
https://doi.org/10.23736/S2724-542X.21.02760-9 . .