Dakovic, Aleksandra

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  • Dakovic, Aleksandra (3)
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Author's Bibliography

Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent

Dakovic, Aleksandra; Kragović, Milan M.; Rottinghaus, George E.; Ledoux, David R.; Butkeraitis, Paula; Vojislavljevic, Dubravka Z.; Zarić, Snežana D.; Stamenić, Ljubisav

(2012)

TY  - JOUR
AU  - Dakovic, Aleksandra
AU  - Kragović, Milan M.
AU  - Rottinghaus, George E.
AU  - Ledoux, David R.
AU  - Butkeraitis, Paula
AU  - Vojislavljevic, Dubravka Z.
AU  - Zarić, Snežana D.
AU  - Stamenić, Ljubisav
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4363
AB  - A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent. (C) 2012 Elsevier B.V. All rights reserved.
T2  - Materials Chemistry and Physics
T1  - Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent
VL  - 137
IS  - 1
SP  - 213
EP  - 220
DO  - 10.1016/j.matchemphys.2012.09.010
ER  - 
@article{
author = "Dakovic, Aleksandra and Kragović, Milan M. and Rottinghaus, George E. and Ledoux, David R. and Butkeraitis, Paula and Vojislavljevic, Dubravka Z. and Zarić, Snežana D. and Stamenić, Ljubisav",
year = "2012",
abstract = "A zinc-exchanged montmorillonite (Zn-MONT) was prepared from a natural montmorillonite (MONT) and the adsorption of aflatoxin B-1 (AFB(1)) was investigated at pH 3 and 7. Characterization of Zn-MONT was done by determination of chemical composition, the point of the zero charge (pH(pzc)), thermal (DTA/TGA/DTG) and X-ray powder diffraction (XRPD) analysis. Adsorption of AFB(1) (C-0 = 4 ppm) by Zn-MONT, at different solid/liquid ratios (10, 1 and 0.5 g L-1), at pH 3 or 7, showed that its adsorption was high (over 96%) and independent of pH, similar to MONT. No desorption of AFB(1) from MONT-AFB(1) and Zn-MONT-AFB(1) complexes occurred at pH 6.5, suggesting strong binding of AFB(1) by both adsorbents. Furthermore, AFB(1) adsorption by Zn-MONT followed a nonlinear (Langmuir) type of isotherm at pH 3 with a calculated maximum capacity of 60.17 mg g(-1). The stability of MONT-AFB(1) and Zn-MONT-AFB(1) complexes was evaluated by calculating the binding energies between AFB(1) and metal cations using quantum chemical methods. The evaluated interaction energies of AFB(1) with hydrated Zn2+, Mg2+, and Ca2+ cations showed that the strongest interaction was the interaction of the Zn2+ system, -70.2 kcal mol(-1), whereas energies for Mg-2 and Ca2+ systems were -68.8 and -62.9 kcal mol(-1), respectively. The results indicate that Zn-MONT can be suitable for potential practical application as both, an antibacterial and an aflatoxin binding agent. (C) 2012 Elsevier B.V. All rights reserved.",
journal = "Materials Chemistry and Physics",
title = "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent",
volume = "137",
number = "1",
pages = "213-220",
doi = "10.1016/j.matchemphys.2012.09.010"
}
Dakovic, A., Kragović, M. M., Rottinghaus, G. E., Ledoux, D. R., Butkeraitis, P., Vojislavljevic, D. Z., Zarić, S. D.,& Stamenić, L.. (2012). Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics, 137(1), 213-220.
https://doi.org/10.1016/j.matchemphys.2012.09.010
Dakovic A, Kragović MM, Rottinghaus GE, Ledoux DR, Butkeraitis P, Vojislavljevic DZ, Zarić SD, Stamenić L. Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent. in Materials Chemistry and Physics. 2012;137(1):213-220.
doi:10.1016/j.matchemphys.2012.09.010 .
Dakovic, Aleksandra, Kragović, Milan M., Rottinghaus, George E., Ledoux, David R., Butkeraitis, Paula, Vojislavljevic, Dubravka Z., Zarić, Snežana D., Stamenić, Ljubisav, "Preparation and characterization of zinc-exchanged montmorillonite and its effectiveness as aflatoxin B-1 adsorbent" in Materials Chemistry and Physics, 137, no. 1 (2012):213-220,
https://doi.org/10.1016/j.matchemphys.2012.09.010 . .
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Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)

Andrić, Goran G.; Marković, Mirjana; Adamovic, Milan; Dakovic, Aleksandra; Golić, Marijana Prazic; Kljajic, Petar J.

(2012)

TY  - JOUR
AU  - Andrić, Goran G.
AU  - Marković, Mirjana
AU  - Adamovic, Milan
AU  - Dakovic, Aleksandra
AU  - Golić, Marijana Prazic
AU  - Kljajic, Petar J.
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/4799
AB  - Insecticidal potential of natural zeolites and diatomaceous earths originating from Serbia against Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) was evaluated. Two natural zeolite formulations (NZ and NZ Modified) were applied to wheat at rates of 0.50, 0.75, and 1.0 g/kg, while two diatomaceous earth (DE) formulations (DE S-1 and DE S-2) were applied at rates of 0.25, 0.50, 0.75, and 1.0 g/kg. A bioassay was conducted under laboratory conditions: temperature of 24 +/- 1 degrees C, relative humidity in the range 50-55%, in tests with natural zeolites, and 60-65%, in tests with DEs, and in all combinations for progeny production. Mortality was assessed after 7, 14, and 21 d of insect contact with treated wheat, and the total mortality after an additional 7-d recovery on untreated broken wheat. Progeny production was also assessed after 8wk for S. oryzae and 12 wk for T. castaneum. The highest mortality for S. oryzae and T. castaneum was found after the longest exposure period and 7 d of recovery, on wheat treated with NZ at the highest rate and DEs at rates of 0.50-1.0 g/kg. Progeny reduction higher than 90% was achieved after 14 and 21 d of contact of both beetle pests with wheat treated with DE S-1 at 0.50-1.0 g/kg and DE S-2 at 0.75-1.0 g/kg, while the same level of reduction was achieved only for T. castaneum after its contact with the highest rate of NZ formulation. NZ Modified, applied even at the highest rate, revealed much lower insecticidal potential.
T2  - Journal of Economic Entomology
T1  - Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)
VL  - 105
IS  - 2
SP  - 670
EP  - 678
DO  - 10.1603/EC11243
ER  - 
@article{
author = "Andrić, Goran G. and Marković, Mirjana and Adamovic, Milan and Dakovic, Aleksandra and Golić, Marijana Prazic and Kljajic, Petar J.",
year = "2012",
abstract = "Insecticidal potential of natural zeolites and diatomaceous earths originating from Serbia against Sitophilus oryzae (L.) and Tribolium castaneum (Herbst) was evaluated. Two natural zeolite formulations (NZ and NZ Modified) were applied to wheat at rates of 0.50, 0.75, and 1.0 g/kg, while two diatomaceous earth (DE) formulations (DE S-1 and DE S-2) were applied at rates of 0.25, 0.50, 0.75, and 1.0 g/kg. A bioassay was conducted under laboratory conditions: temperature of 24 +/- 1 degrees C, relative humidity in the range 50-55%, in tests with natural zeolites, and 60-65%, in tests with DEs, and in all combinations for progeny production. Mortality was assessed after 7, 14, and 21 d of insect contact with treated wheat, and the total mortality after an additional 7-d recovery on untreated broken wheat. Progeny production was also assessed after 8wk for S. oryzae and 12 wk for T. castaneum. The highest mortality for S. oryzae and T. castaneum was found after the longest exposure period and 7 d of recovery, on wheat treated with NZ at the highest rate and DEs at rates of 0.50-1.0 g/kg. Progeny reduction higher than 90% was achieved after 14 and 21 d of contact of both beetle pests with wheat treated with DE S-1 at 0.50-1.0 g/kg and DE S-2 at 0.75-1.0 g/kg, while the same level of reduction was achieved only for T. castaneum after its contact with the highest rate of NZ formulation. NZ Modified, applied even at the highest rate, revealed much lower insecticidal potential.",
journal = "Journal of Economic Entomology",
title = "Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)",
volume = "105",
number = "2",
pages = "670-678",
doi = "10.1603/EC11243"
}
Andrić, G. G., Marković, M., Adamovic, M., Dakovic, A., Golić, M. P.,& Kljajic, P. J.. (2012). Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae). in Journal of Economic Entomology, 105(2), 670-678.
https://doi.org/10.1603/EC11243
Andrić GG, Marković M, Adamovic M, Dakovic A, Golić MP, Kljajic PJ. Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae). in Journal of Economic Entomology. 2012;105(2):670-678.
doi:10.1603/EC11243 .
Andrić, Goran G., Marković, Mirjana, Adamovic, Milan, Dakovic, Aleksandra, Golić, Marijana Prazic, Kljajic, Petar J., "Insecticidal Potential of Natural Zeolite and Diatomaceous Earth Formulations Against Rice Weevil (Coleoptera: Curculionidae) and Red Flour Beetle (Coleoptera: Tenebrionidae)" in Journal of Economic Entomology, 105, no. 2 (2012):670-678,
https://doi.org/10.1603/EC11243 . .
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Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1

Dakovic, Aleksandra; Kragović, Milan M.; Rottinghaus, George E.; Sekulic, Zivko; Milicevic, Sonja; Milonjić, Slobodan K.; Zarić, Snežana D.

(2010)

TY  - JOUR
AU  - Dakovic, Aleksandra
AU  - Kragović, Milan M.
AU  - Rottinghaus, George E.
AU  - Sekulic, Zivko
AU  - Milicevic, Sonja
AU  - Milonjić, Slobodan K.
AU  - Zarić, Snežana D.
PY  - 2010
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/3912
AB  - Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1. (C) 2009 Elsevier B.V. All rights reserved.
T2  - Colloids and Surfaces. B: Biointerfaces
T1  - Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1
VL  - 76
IS  - 1
SP  - 272
EP  - 278
DO  - 10.1016/j.colsurfb.2009.11.003
ER  - 
@article{
author = "Dakovic, Aleksandra and Kragović, Milan M. and Rottinghaus, George E. and Sekulic, Zivko and Milicevic, Sonja and Milonjić, Slobodan K. and Zarić, Snežana D.",
year = "2010",
abstract = "Natural Zeolitic tuff was modified with 2, 5 and 10 mmol M+/100 g of octadecyldimethylbenzyl ammonium (ODMBA) ions and the products were denoted as OZ-2, OZ-5 and OZ-10. The starting material and organozeolites were characterized by determination of the point of zero charge (pH(pzc)) and by thermal analysis. in vitro sorption of fumonisin B-1 (FB1) was studied for all sorbents at pH 3, 7 and 9. The pH(pzc) for the zeolitic tuff was 6.8 +/- 0.1, while the pH(pzc) for OZ-2, OZ-5 and OZ-10 pH(pzc) was 7.0 +/- 0.1. The curves pH(final) = f(pH(initial)) suggest that the surfaces of all sorbents are positively charged at pH 3 and uncharged at pH 7 and 9. High sorption of FB1 by the zeolitic tuff in acidic solution Suggests electrostatic Interactions between the anionic FB1 and the positively charged surface. At pH 7 and 9, adsorption of FB1 is prevented because anionic FB1 cannot be adsorbed at the uncharged surface. From the pH(pzc) for the organozeolites, it is possible that with lower amounts of ODMBA (OZ-2 and OZ-5), at pH 3, beside interactions between head groups of ODMBA and its alkyl chains and anionic FB1, electrostatic interactions between positive uncovered surface and anionic FB1 contribute to the sorption, while at pH 7 and 9 there is only the possibility for interactions between FB1 and ODMBA. When the zeolitic surface was completely covered with ODMBA (OZ-10), FB1 sorption was independent of the form of FB1 suggesting only interactions between ODMBA and FB1. (C) 2009 Elsevier B.V. All rights reserved.",
journal = "Colloids and Surfaces. B: Biointerfaces",
title = "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1",
volume = "76",
number = "1",
pages = "272-278",
doi = "10.1016/j.colsurfb.2009.11.003"
}
Dakovic, A., Kragović, M. M., Rottinghaus, G. E., Sekulic, Z., Milicevic, S., Milonjić, S. K.,& Zarić, S. D.. (2010). Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces. B: Biointerfaces, 76(1), 272-278.
https://doi.org/10.1016/j.colsurfb.2009.11.003
Dakovic A, Kragović MM, Rottinghaus GE, Sekulic Z, Milicevic S, Milonjić SK, Zarić SD. Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1. in Colloids and Surfaces. B: Biointerfaces. 2010;76(1):272-278.
doi:10.1016/j.colsurfb.2009.11.003 .
Dakovic, Aleksandra, Kragović, Milan M., Rottinghaus, George E., Sekulic, Zivko, Milicevic, Sonja, Milonjić, Slobodan K., Zarić, Snežana D., "Influence of natural zeolitic tuff and organozeolites surface charge on sorption of ionizable fumonisin B-1" in Colloids and Surfaces. B: Biointerfaces, 76, no. 1 (2010):272-278,
https://doi.org/10.1016/j.colsurfb.2009.11.003 . .
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