TY  - JOUR
AU  - Lazić, Vesna M.
AU  - Vivod, Vera
AU  - Peršin, Zdenka
AU  - Stoiljković, Milovan
AU  - Ratnayake, Ishara S.
AU  - Ahrenkiel, Phillip S.
AU  - Nedeljković, Jovan
AU  - Kokol, Vanja
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9676
AB  - The effect of dextran-coated silver nanoparticles (Ag NPs 12.0 ± 1.9 nm) loading (0−0.42 wt%) on the mechanical, barrier, and antimicrobial properties of thin (50−60 μm) films prepared from cellulose nanofibrils by solvent casting method were studied as eco-friendly and food-preservative packaging materials. The presence of dextran was shown to act not only as a dispersing media for Ag NPs and controlling its release but also as a moisture-resistant sealable additive that, synergetically with reduced oxygen permeability, may preserve the food against bacteria growth. Thus, significantly reduced Oxygen Transmission Rates (from 2.07 to 1.40-0.78 cm3 m−2d−1) and hydrophilicity (from 20.8° to 52.4° for MilliQ water, and from 35-37° to 62-74° for 3 % acetic acid and 0.9 % NaCl simulant solutions), yielding a 99.9 % inhibition of Escherichia coli after five repeated cycles of 24 h exposure to 0.9 % NaCl solution was displayed, supported by a controlled release of Ag+ ions (below the toxicologically harmful threshold, <0.5 mg L-1).
T2  - Food Packaging and Shelf Life
T1  - Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging
VL  - 26
SP  - 100575
DO  - 10.1016/j.fpsl.2020.100575
ER  - 

@article{
author = "Lazić, Vesna M. and Vivod, Vera and Peršin, Zdenka and Stoiljković, Milovan and Ratnayake, Ishara S. and Ahrenkiel, Phillip S. and Nedeljković, Jovan and Kokol, Vanja",
year = "2020",
abstract = "The effect of dextran-coated silver nanoparticles (Ag NPs 12.0 ± 1.9 nm) loading (0−0.42 wt%) on the mechanical, barrier, and antimicrobial properties of thin (50−60 μm) films prepared from cellulose nanofibrils by solvent casting method were studied as eco-friendly and food-preservative packaging materials. The presence of dextran was shown to act not only as a dispersing media for Ag NPs and controlling its release but also as a moisture-resistant sealable additive that, synergetically with reduced oxygen permeability, may preserve the food against bacteria growth. Thus, significantly reduced Oxygen Transmission Rates (from 2.07 to 1.40-0.78 cm3 m−2d−1) and hydrophilicity (from 20.8° to 52.4° for MilliQ water, and from 35-37° to 62-74° for 3 % acetic acid and 0.9 % NaCl simulant solutions), yielding a 99.9 % inhibition of Escherichia coli after five repeated cycles of 24 h exposure to 0.9 % NaCl solution was displayed, supported by a controlled release of Ag+ ions (below the toxicologically harmful threshold, <0.5 mg L-1).",
journal = "Food Packaging and Shelf Life",
title = "Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging",
volume = "26",
pages = "100575",
doi = "10.1016/j.fpsl.2020.100575"
}

Lazić, V. M., Vivod, V., Peršin, Z., Stoiljković, M., Ratnayake, I. S., Ahrenkiel, P. S., Nedeljković, J.,& Kokol, V.. (2020). Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging. in Food Packaging and Shelf Life, 26, 100575.
https://doi.org/10.1016/j.fpsl.2020.100575

Lazić VM, Vivod V, Peršin Z, Stoiljković M, Ratnayake IS, Ahrenkiel PS, Nedeljković J, Kokol V. Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging. in Food Packaging and Shelf Life. 2020;26:100575.
doi:10.1016/j.fpsl.2020.100575 .

Lazić, Vesna M., Vivod, Vera, Peršin, Zdenka, Stoiljković, Milovan, Ratnayake, Ishara S., Ahrenkiel, Phillip S., Nedeljković, Jovan, Kokol, Vanja, "Dextran-coated silver nanoparticles for improved barrier and controlled antimicrobial properties of nanocellulose films used in food packaging" in Food Packaging and Shelf Life, 26 (2020):100575,
https://doi.org/10.1016/j.fpsl.2020.100575 . .

TY  - JOUR
AU  - Davidović, Slađana Z.
AU  - Lazić, Vesna M.
AU  - Miljković, Miona G.
AU  - Gordić, Milan V.
AU  - Sekulić, Milica
AU  - Marinović-Cincović, Milena
AU  - Ratnayake, Ishara S.
AU  - Ahrenkiel, Scott Phillip
AU  - Nedeljković, Jovan
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8452
AB  - The antibacterial ability of in situ prepared nanometer-sized silver particles, immobilized in agar-agar films, was studied as a function of the concentration of co-dopant, magnesium ions. Content of inorganic components in hybrid films was determined using inductively coupled plasma optic emission spectroscopy, and found to be low (<2 wt.-%). Morphology of prepared hybrid films, studied by transmission electron microscopy, revealed the presence of non-agglomerated and randomly distributed 10–20 nm silver nanoparticles (Ag NPs) within the agar-agar matrices. Fourier-transform infrared spectroscopy indicated the distinct chemical interaction between Ag NPs and polymer chains. Thermogravimetric analysis, as well as the determination of tensile strength, Young's modulus, and elongation at break showed improvement of thermal stability and mechanical properties of agar-agar matrices upon the incorporation of Ag NPs due to high compatibility between the hydrophilic organic component and inorganic components. The complete microbial reduction of Gram-positive bacteria Staphylococcus aureuswas observed for all agar-silver films, while satisfactory results were observed for Gram-negative bacteria Pseudomonas aeruginosa (≥99.6%). The release of Ag+ ions is suppressed by the increase of the concentration of Mg2+ ions and it was found to be significantly smaller (≤0.24 ppm) than the harmful ecological level (1 ppm). © 2019 Elsevier Ltd
T2  - Carbohydrate Polymers
T1  - Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions
VL  - 224
SP  - 115187
DO  - 10.1016/j.carbpol.2019.115187
ER  - 

@article{
author = "Davidović, Slađana Z. and Lazić, Vesna M. and Miljković, Miona G. and Gordić, Milan V. and Sekulić, Milica and Marinović-Cincović, Milena and Ratnayake, Ishara S. and Ahrenkiel, Scott Phillip and Nedeljković, Jovan",
year = "2019",
abstract = "The antibacterial ability of in situ prepared nanometer-sized silver particles, immobilized in agar-agar films, was studied as a function of the concentration of co-dopant, magnesium ions. Content of inorganic components in hybrid films was determined using inductively coupled plasma optic emission spectroscopy, and found to be low (<2 wt.-%). Morphology of prepared hybrid films, studied by transmission electron microscopy, revealed the presence of non-agglomerated and randomly distributed 10–20 nm silver nanoparticles (Ag NPs) within the agar-agar matrices. Fourier-transform infrared spectroscopy indicated the distinct chemical interaction between Ag NPs and polymer chains. Thermogravimetric analysis, as well as the determination of tensile strength, Young's modulus, and elongation at break showed improvement of thermal stability and mechanical properties of agar-agar matrices upon the incorporation of Ag NPs due to high compatibility between the hydrophilic organic component and inorganic components. The complete microbial reduction of Gram-positive bacteria Staphylococcus aureuswas observed for all agar-silver films, while satisfactory results were observed for Gram-negative bacteria Pseudomonas aeruginosa (≥99.6%). The release of Ag+ ions is suppressed by the increase of the concentration of Mg2+ ions and it was found to be significantly smaller (≤0.24 ppm) than the harmful ecological level (1 ppm). © 2019 Elsevier Ltd",
journal = "Carbohydrate Polymers",
title = "Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions",
volume = "224",
pages = "115187",
doi = "10.1016/j.carbpol.2019.115187"
}

Davidović, S. Z., Lazić, V. M., Miljković, M. G., Gordić, M. V., Sekulić, M., Marinović-Cincović, M., Ratnayake, I. S., Ahrenkiel, S. P.,& Nedeljković, J.. (2019). Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions. in Carbohydrate Polymers, 224, 115187.
https://doi.org/10.1016/j.carbpol.2019.115187

Davidović SZ, Lazić VM, Miljković MG, Gordić MV, Sekulić M, Marinović-Cincović M, Ratnayake IS, Ahrenkiel SP, Nedeljković J. Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions. in Carbohydrate Polymers. 2019;224:115187.
doi:10.1016/j.carbpol.2019.115187 .

Davidović, Slađana Z., Lazić, Vesna M., Miljković, Miona G., Gordić, Milan V., Sekulić, Milica, Marinović-Cincović, Milena, Ratnayake, Ishara S., Ahrenkiel, Scott Phillip, Nedeljković, Jovan, "Antibacterial ability of immobilized silver nanoparticles in agar-agar films co-doped with magnesium ions" in Carbohydrate Polymers, 224 (2019):115187,
https://doi.org/10.1016/j.carbpol.2019.115187 . .