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Your search keyword '"Božović, N."' showing total 8 results
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8 results on '"Božović, N."'

1. Zeolite-based photocatalysts immobilized on aluminum support by plasma electrolytic oxidation

Author

Mojsilovic, K., Bozovic, N., Stojanovic, S., Damjanovic-Vasilic, L., Serdechnova, M., Blawert, C., Zheludkevich, M. L., Stojadinovic, S., and Vasilic, R.

Subjects
Physics - Applied Physics, Condensed Matter - Materials Science
Abstract

The preparation and properties of zeolite-containing oxide coatings obtained by plasma electrolytic oxidation are investigated and discussed. Pure and Ce-exchanged natural (clinoptilolite) and synthetic (13X) zeolites are immobilized on aluminum support from silicate-based electrolyte. Obtained coatings are characterized with respect to their morphology, phase and chemical composition, photocatalytic activity and anti-corrosion properties. It is observed that all mentioned properties of obtained coatings are dependent on processing time and type of immobilized zeolite. Coatings with Ce-exchanged zeolite show higher photocatalytic activity and more effective corrosion protection than those with pure zeolite. The highest photocatalytic activity is observed for coatings processed in pulsed a DC regime for 30 minutes containing Ce-exchanged 13X zeolite, followed by those containing Ce-exchanged clinoptilolite. Pronounced anti-corrosion properties feature almost all samples containing Ce-exchanged 13X zeolite.

Published
2022
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2. Optical dichroism in nanotubes

Author

Bozovic, I., Bozovic, N., and Damnjanovic, M.

Subjects
Condensed Matter - Soft Condensed Matter, Condensed Matter - Materials Science
Abstract

Utilizing the line-group symmetry of single-wall nanotubes, we have assigned their electron-energy bands by the symmetry-based quantum numbers. The selection rules for optical absorption are presented in terms of these quantum numbers. Different interband transitions become allowed as the polarization of incident light is varied, and we predict a substantial optical dichroism. We propose how to observe this effect in experiments on a single nanotube, and how it can be used to control quantum transport in nanotubes to obtain information about the structure., Comment: 4 pages, 3 fiures, to appear in Phy. Rev. B

Published
2000
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5. Fluoxetine normalized nuclear phospho erk1/2 signaling in stressed females

Author

Mitić, Miloš, Lukić, Iva, Božović, N., Đorđević, Jelena D., and Adžić, Miroslav

Abstract

A growing body of evidence indicates extracellular signal-regulated kinase (ERK1/2) participates in various stress-induced responses which isconsider to beinvolved in pathophysiology of depression. Surprisingly, the effect of antidepressants on ERKs is almost unexplored, particularly from the perspective of sexes.In the present study, we investigated the potential role of cytoplasm-nuclear distribution of phospho-ERK1/2 in the hippocampus of chronically stressed female and male Wistar rats and if those potential changes could be attenuated with chronic fluoxetine treatment. In females, stress induced cytosolic retention of phospho-ERKs, while in malesitpromoted the nuclear translocation of phospho-ERK 1/2. The effect of concomitant fluoxetine treatment was more pronounced in stressed females, with main focus on normalization of its nuclear phospho-ERK 1/2 levels.

Published
2014

8. Biological effects of bacterial pigment undecylprodigiosin on human blood cells treated with atmospheric gas plasma in vitro.

Author

Lazović S, Leskovac A, Petrović S, Senerovic L, Krivokapić N, Mitrović T, Božović N, Vasić V, and Nikodinovic-Runic J

Subjects
Blood Cells radiation effects, DNA Damage drug effects, Humans, In Vitro Techniques, Lipid Peroxidation drug effects, Prodigiosin pharmacology, Antioxidants pharmacology, Blood Cells drug effects, Oxidative Stress drug effects, Prodigiosin analogs & derivatives, Radiation-Protective Agents pharmacology
Abstract

It is known that some bacterial species are more resilient to different kinds of irradiation due to the naturally developed protective mechanisms and compounds such as pigments. On the other hand, reasoned tissue engineering using plasma remains a critical task and requires very precise control of plasma parameters in order to mitigate its potential detrimental effects. Here we isolated a natural protective agent, microbially produced undecylprodigiosin ((5'Z)-4'-methoxy-5'-[(5-undecyl-1H-pyrrol-2-yl)methylene]-1H,5'H-2,2'-bipyrrole), and investigated its effects on human blood cells independently and in combination with plasma. Two approaches were applied; the first, undecylprodigiosin (UP pigment) was added to the blood cultures, which then were exposed to plasma (pre-treatment); and the second- the blood cultures were exposed to plasma and then treated with pigment (post-treatment). The interactions of plasma and UP pigment with blood cells were investigated by conducting a series of biological tests providing the information regarding their genotoxicity, cytotoxicity and redox modulating activities. The exposure of cells to plasma induced oxidative stress as well as certain genotoxic and cytotoxic effects seen as elevated micronuclei incidence, decreased cell proliferation and enhanced apoptosis. In blood cultures treated with UP pigment alone, we found that both cytotoxic and protective effects could be induced depending on the concentration used. The highest UP pigment concentration increased lipid peroxidation and the incidence of micronuclei by more than 70% with maximal suppression of cell proliferation. On the contrary, we found that the lowest UP pigment concentration displayed protective effects. In combined treatments with plasma and UP pigment, we found that UP pigment could provide spatial shielding to plasma exposure. In the pre-treatment approach, the incidence of micronuclei was reduced by 35.52% compared to control while malondialdehyde level decreased by 36% indicating a significant mitigation of membrane damage induced by plasma. These results open perspectives for utilizing UP pigment for protection against overexposures in the field of plasma medicine., (Copyright © 2016 Elsevier GmbH. All rights reserved.)

Published
2017
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