TY  - JOUR
AU  - Kokunesoski, Maja
AU  - Baščarević, Zvezdana
AU  - Rakocević, Zlatko
AU  - Šaponjić, Aleksandra
AU  - Saponjic, Đorđe
AU  - Jordanov, Dragana
AU  - Babić, Biljana M.
PY  - 2018
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1130
AB  - Mesoporous silica SBA-15 materials of high specific surface area (similar to 700 m(2) g(-1)) were synthesized by using block copolymer Pluronic P123 as template and tetraethoxysilane as silica source. The obtained materials were characterized by XRD, nitrogen adsorption desorption measurements, SEM, EDS and AFM analysis. It was found that small modifications of synthesis conditions influenced the morphological features of the synthesized SBA-15 samples. The SEM analysis had shown that the SBA-15 synthesized at lower temperature and longer time of reaction (80 degrees C, 48 h) provided elongated rod-shaped grains about 1 mu m long. The other sample synthesized at higher temperature and shorter time of reaction (100 degrees C, 24 h) had rounded grains and grains of regular spherical shape with diameters ranging from 0.5 to 2 mu m. The EDS analysis confirmed that the particles of both synthesized samples were of the SiO2 content. In addition, the AFM analysis had shown different surface morphologies of the materials synthesized under various conditions.
PB  - Međunarodni Institut za nauku o sinterovanju, Beograd
T2  - Science of Sintering
T1  - Influence of Synthesis Conditions on Morphological Features of the SBA-15 Containing Only Elongated and Rounded/Spherical Grains
EP  - 121
IS  - 1
SP  - 111
VL  - 50
DO  - 10.2298/SOS1801111K
ER  - 

@article{
author = "Kokunesoski, Maja and Baščarević, Zvezdana and Rakocević, Zlatko and Šaponjić, Aleksandra and Saponjic, Đorđe and Jordanov, Dragana and Babić, Biljana M.",
year = "2018",
abstract = "Mesoporous silica SBA-15 materials of high specific surface area (similar to 700 m(2) g(-1)) were synthesized by using block copolymer Pluronic P123 as template and tetraethoxysilane as silica source. The obtained materials were characterized by XRD, nitrogen adsorption desorption measurements, SEM, EDS and AFM analysis. It was found that small modifications of synthesis conditions influenced the morphological features of the synthesized SBA-15 samples. The SEM analysis had shown that the SBA-15 synthesized at lower temperature and longer time of reaction (80 degrees C, 48 h) provided elongated rod-shaped grains about 1 mu m long. The other sample synthesized at higher temperature and shorter time of reaction (100 degrees C, 24 h) had rounded grains and grains of regular spherical shape with diameters ranging from 0.5 to 2 mu m. The EDS analysis confirmed that the particles of both synthesized samples were of the SiO2 content. In addition, the AFM analysis had shown different surface morphologies of the materials synthesized under various conditions.",
publisher = "Međunarodni Institut za nauku o sinterovanju, Beograd",
journal = "Science of Sintering",
title = "Influence of Synthesis Conditions on Morphological Features of the SBA-15 Containing Only Elongated and Rounded/Spherical Grains",
pages = "121-111",
number = "1",
volume = "50",
doi = "10.2298/SOS1801111K"
}

Kokunesoski, M., Baščarević, Z., Rakocević, Z., Šaponjić, A., Saponjic, Đ., Jordanov, D.,& Babić, B. M.. (2018). Influence of Synthesis Conditions on Morphological Features of the SBA-15 Containing Only Elongated and Rounded/Spherical Grains. in Science of Sintering
Međunarodni Institut za nauku o sinterovanju, Beograd., 50(1), 111-121.
https://doi.org/10.2298/SOS1801111K

Kokunesoski M, Baščarević Z, Rakocević Z, Šaponjić A, Saponjic Đ, Jordanov D, Babić BM. Influence of Synthesis Conditions on Morphological Features of the SBA-15 Containing Only Elongated and Rounded/Spherical Grains. in Science of Sintering. 2018;50(1):111-121.
doi:10.2298/SOS1801111K .

Kokunesoski, Maja, Baščarević, Zvezdana, Rakocević, Zlatko, Šaponjić, Aleksandra, Saponjic, Đorđe, Jordanov, Dragana, Babić, Biljana M., "Influence of Synthesis Conditions on Morphological Features of the SBA-15 Containing Only Elongated and Rounded/Spherical Grains" in Science of Sintering, 50, no. 1 (2018):111-121,
https://doi.org/10.2298/SOS1801111K . .

TY  - JOUR
AU  - Milovanović, Petar
AU  - Hrncic, Dragan
AU  - Radotić, Ksenija
AU  - Stanković, Mira
AU  - Mutavdžić, Dragosav
AU  - Djonic, Danijela
AU  - Rasic-Marković, Aleksandra
AU  - Djuric, Dragan
AU  - Stanojlović, Olivera
AU  - Djuric, Marija
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1039
AB  - Aims: In general, hyperhomocysteinemia is increasingly appreciated as a risk factor for various diseases, including osteoporosis. However, its effects in non-adults remain largely unknown. Our aim was to determine whether dietary-caused increased homocysteine levels have deleterious effects on bone structure during growth. Main methods: We developed a model of moderate hyperhomocysteinemia caused by short-term methionine nutritional overload in growing rats. 30-days-old male Wistar albino rats were randomly assigned to either experimental group subject to a 30-days hypermethionine diet or control group. High-resolution 3D assessment of bone geometry and microarchitecture, as well as fluorescence spectroscopic analysis of bone matrix were performed. Key findings: Short-term moderate hyperhomocysteinemia (similar to 30 mu mol/L) achieved in the study notably affected bone and cartilage characteristics. Parameters of the cortical bone geometry in the experimental group indicated peculiar reorganization of the bone cross-section. Trabecular bone microarchitecture was especially sensitive to hyperhomocysteinemia showing clearly negative bone balance in the experimental group (almost 30% reduced bone volume, mainly due to similar to 25% decrease in trabecular number as well as markedly reduced trabecular connections). Fluorescent spectroscopy of bone matrix revealed multiple alterations to collagen spectra due to homocysteine accumulation in bone, indicative of broken collagenous cross-links. Significance: Given that appropriate accrual of bone mass during growth has important effects on the risk of osteoporosis in adulthood, understanding the skeletal effects of dietary-induced hyperhomocysteinemia in nonadults is essential for interpreting its importance as a modifiable risk factor for osteoporosis and improving programs to preserve/re-establish bone health.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Life Sciences
T1  - Moderate hyperhomocysteinemia induced by short-term dietary methionine overload alters bone microarchitecture and collagen features during growth
EP  - 16
SP  - 9
VL  - 191
DO  - 10.1016/j.lfs.2017.10.008
ER  - 

@article{
author = "Milovanović, Petar and Hrncic, Dragan and Radotić, Ksenija and Stanković, Mira and Mutavdžić, Dragosav and Djonic, Danijela and Rasic-Marković, Aleksandra and Djuric, Dragan and Stanojlović, Olivera and Djuric, Marija",
year = "2017",
abstract = "Aims: In general, hyperhomocysteinemia is increasingly appreciated as a risk factor for various diseases, including osteoporosis. However, its effects in non-adults remain largely unknown. Our aim was to determine whether dietary-caused increased homocysteine levels have deleterious effects on bone structure during growth. Main methods: We developed a model of moderate hyperhomocysteinemia caused by short-term methionine nutritional overload in growing rats. 30-days-old male Wistar albino rats were randomly assigned to either experimental group subject to a 30-days hypermethionine diet or control group. High-resolution 3D assessment of bone geometry and microarchitecture, as well as fluorescence spectroscopic analysis of bone matrix were performed. Key findings: Short-term moderate hyperhomocysteinemia (similar to 30 mu mol/L) achieved in the study notably affected bone and cartilage characteristics. Parameters of the cortical bone geometry in the experimental group indicated peculiar reorganization of the bone cross-section. Trabecular bone microarchitecture was especially sensitive to hyperhomocysteinemia showing clearly negative bone balance in the experimental group (almost 30% reduced bone volume, mainly due to similar to 25% decrease in trabecular number as well as markedly reduced trabecular connections). Fluorescent spectroscopy of bone matrix revealed multiple alterations to collagen spectra due to homocysteine accumulation in bone, indicative of broken collagenous cross-links. Significance: Given that appropriate accrual of bone mass during growth has important effects on the risk of osteoporosis in adulthood, understanding the skeletal effects of dietary-induced hyperhomocysteinemia in nonadults is essential for interpreting its importance as a modifiable risk factor for osteoporosis and improving programs to preserve/re-establish bone health.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Life Sciences",
title = "Moderate hyperhomocysteinemia induced by short-term dietary methionine overload alters bone microarchitecture and collagen features during growth",
pages = "16-9",
volume = "191",
doi = "10.1016/j.lfs.2017.10.008"
}

Milovanović, P., Hrncic, D., Radotić, K., Stanković, M., Mutavdžić, D., Djonic, D., Rasic-Marković, A., Djuric, D., Stanojlović, O.,& Djuric, M.. (2017). Moderate hyperhomocysteinemia induced by short-term dietary methionine overload alters bone microarchitecture and collagen features during growth. in Life Sciences
Pergamon-Elsevier Science Ltd, Oxford., 191, 9-16.
https://doi.org/10.1016/j.lfs.2017.10.008

Milovanović P, Hrncic D, Radotić K, Stanković M, Mutavdžić D, Djonic D, Rasic-Marković A, Djuric D, Stanojlović O, Djuric M. Moderate hyperhomocysteinemia induced by short-term dietary methionine overload alters bone microarchitecture and collagen features during growth. in Life Sciences. 2017;191:9-16.
doi:10.1016/j.lfs.2017.10.008 .

Milovanović, Petar, Hrncic, Dragan, Radotić, Ksenija, Stanković, Mira, Mutavdžić, Dragosav, Djonic, Danijela, Rasic-Marković, Aleksandra, Djuric, Dragan, Stanojlović, Olivera, Djuric, Marija, "Moderate hyperhomocysteinemia induced by short-term dietary methionine overload alters bone microarchitecture and collagen features during growth" in Life Sciences, 191 (2017):9-16,
https://doi.org/10.1016/j.lfs.2017.10.008 . .

TY  - JOUR
AU  - Lojpur, Vesna
AU  - Tasić, Nikola
AU  - Validzic, Ivana
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1030
AB  - The focus of this paper was on the different behaviors in current-voltage measurements of fabricated solar cells due to variations in scan rates (the slowest 10 mV s(-1), medium 50 mV s(-1), and the fastest 100 mV s(-1)). Three different undoped and doped antimony sulfide (Sb2S3)-based hybrids solar cells were examined under standard test conditions (1 sun) as follows: indium tin oxide glass/amorphous Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum; indium tin oxide glass/p-doped Sb2S3-polyaniline/amorphous Sb2S3-polyaniline/n-doped Sb2S3-polyaniline/polyaniline/electrolyte/aluminum; and indium tin oxide glass/p-doped Sb2S3-polyaniline/aSb(2)S(3)-polyaniline/n-doped Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum. Different current-voltage curves changing from inverse exponential, linear to exponential ones with different rates of measurement scans at 1 sun were recorded. The obtained results also show basic cell characteristics such as fill factor, short-circuit current, efficiency, series, and shunt resistances. The highest efficiencies of all three cells were obtained at the slowest scan rate, while values of the shunt and series resistances are in agreement with the shape of the curves. On the other hand, one example of measurement at lower light intensity (55% of sun) was given, indicating more stable cell performances and the exponential shape of current-voltage curves at all scan rates.
PB  - Springer, Dordrecht
T2  - Journal of Applied Electrochemistry
T1  - Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells
EP  - 124
IS  - 1
SP  - 117
VL  - 47
DO  - 10.1007/s10800-016-1025-2
ER  - 

@article{
author = "Lojpur, Vesna and Tasić, Nikola and Validzic, Ivana",
year = "2017",
abstract = "The focus of this paper was on the different behaviors in current-voltage measurements of fabricated solar cells due to variations in scan rates (the slowest 10 mV s(-1), medium 50 mV s(-1), and the fastest 100 mV s(-1)). Three different undoped and doped antimony sulfide (Sb2S3)-based hybrids solar cells were examined under standard test conditions (1 sun) as follows: indium tin oxide glass/amorphous Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum; indium tin oxide glass/p-doped Sb2S3-polyaniline/amorphous Sb2S3-polyaniline/n-doped Sb2S3-polyaniline/polyaniline/electrolyte/aluminum; and indium tin oxide glass/p-doped Sb2S3-polyaniline/aSb(2)S(3)-polyaniline/n-doped Sb2S3-polyaniline/TiO2/polyaniline/electrolyte/aluminum. Different current-voltage curves changing from inverse exponential, linear to exponential ones with different rates of measurement scans at 1 sun were recorded. The obtained results also show basic cell characteristics such as fill factor, short-circuit current, efficiency, series, and shunt resistances. The highest efficiencies of all three cells were obtained at the slowest scan rate, while values of the shunt and series resistances are in agreement with the shape of the curves. On the other hand, one example of measurement at lower light intensity (55% of sun) was given, indicating more stable cell performances and the exponential shape of current-voltage curves at all scan rates.",
publisher = "Springer, Dordrecht",
journal = "Journal of Applied Electrochemistry",
title = "Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells",
pages = "124-117",
number = "1",
volume = "47",
doi = "10.1007/s10800-016-1025-2"
}

Lojpur, V., Tasić, N.,& Validzic, I.. (2017). Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells. in Journal of Applied Electrochemistry
Springer, Dordrecht., 47(1), 117-124.
https://doi.org/10.1007/s10800-016-1025-2

Lojpur V, Tasić N, Validzic I. Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells. in Journal of Applied Electrochemistry. 2017;47(1):117-124.
doi:10.1007/s10800-016-1025-2 .

Lojpur, Vesna, Tasić, Nikola, Validzic, Ivana, "Different behaviors in current-voltage measurements of undoped and doped Sb2S3-based solar cells" in Journal of Applied Electrochemistry, 47, no. 1 (2017):117-124,
https://doi.org/10.1007/s10800-016-1025-2 . .

TY  - JOUR
AU  - Pesic, Milica
AU  - Podolski-Renic, Ana
AU  - Stojković, Sonja
AU  - Matović, Branko
AU  - Zmejkoski, Danica
AU  - Kojić, Vesna
AU  - Bogdanović, Gordana
AU  - Pavicević, Aleksandra
AU  - Mojović, Miloš
AU  - Savić, Aleksandar G
AU  - Milenković, Ivana
AU  - Kalauzi, Aleksandar
AU  - Radotić, Ksenija
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/931
AB  - Data on medical applications of cerium oxide nanoparticles CeO2 (CONP) are promising, yet information regarding their action in cells is incomplete and there are conflicting reports about in vitro toxicity. Herein, we have studied cytotoxic effect of CONP in several cancer and normal cell lines and their potential to change intracellular redox status. The IC50 was achieved only in two of eight tested cell lines, melanoma 518A2 and colorectal adenocarcinoma HT-29. Self-propagating room temperature method was applied to produce CONP with an average crystalline size of 4 nm. The results confirmed presence of Ce3+ and O2- vacancies. The induction of cell death by CONP and the production of reactive oxygen species (ROS) were analyzed by flow-cytometry. Free radicals related antioxidant capacity of the cells was studied by the reduction of stable free radical TEMPONE using electron spin resonance spectroscopy. CONP showed low or moderate cytotoxicity in cancer cell lines: adenocarcinoma DLD1 and multi-drug resistant DLD1-TxR, non-small cell lung carcinoma NCI-H460 and multi-drug resistant NCI-H460/R, while normal cell lines (keratinocytes HaCaT, lung fetal fibroblasts MRC-5) were insensitive. The most sensitive were 518A2 melanoma and HT-29 colorectal adenocarcinoma cell lines, with the IC50 values being between 100 and 200 mu M. Decreased rate of TEMPONE reduction and increased production of certain ROS species (peroxynitrite and hydrogen peroxide anion) indicates that free radical metabolism, thus redox status was changed, and antioxidant capacity damaged in the CONP treated 518A2 and HT-29 cells. In conclusion, changes in intracellular redox status induced by CONP are partly attributed to the prooxidant activity of the nanoparticles. Further, ROS induced cell damages might eventually lead to the cell death. However, low inhibitory potential of CONP in the other human cell lines tested indicates that CONP may be safe for human usage in industry and medicine.
PB  - Elsevier Ireland Ltd, Clare
T2  - Chemico-Biological Interactions
T1  - Anti-cancer effects of cerium oxide nanoparticles and its intracellular redox activity
EP  - 93
SP  - 85
VL  - 232
DO  - 10.1016/j.cbi.2015.03.013
ER  - 

@article{
author = "Pesic, Milica and Podolski-Renic, Ana and Stojković, Sonja and Matović, Branko and Zmejkoski, Danica and Kojić, Vesna and Bogdanović, Gordana and Pavicević, Aleksandra and Mojović, Miloš and Savić, Aleksandar G and Milenković, Ivana and Kalauzi, Aleksandar and Radotić, Ksenija",
year = "2015",
abstract = "Data on medical applications of cerium oxide nanoparticles CeO2 (CONP) are promising, yet information regarding their action in cells is incomplete and there are conflicting reports about in vitro toxicity. Herein, we have studied cytotoxic effect of CONP in several cancer and normal cell lines and their potential to change intracellular redox status. The IC50 was achieved only in two of eight tested cell lines, melanoma 518A2 and colorectal adenocarcinoma HT-29. Self-propagating room temperature method was applied to produce CONP with an average crystalline size of 4 nm. The results confirmed presence of Ce3+ and O2- vacancies. The induction of cell death by CONP and the production of reactive oxygen species (ROS) were analyzed by flow-cytometry. Free radicals related antioxidant capacity of the cells was studied by the reduction of stable free radical TEMPONE using electron spin resonance spectroscopy. CONP showed low or moderate cytotoxicity in cancer cell lines: adenocarcinoma DLD1 and multi-drug resistant DLD1-TxR, non-small cell lung carcinoma NCI-H460 and multi-drug resistant NCI-H460/R, while normal cell lines (keratinocytes HaCaT, lung fetal fibroblasts MRC-5) were insensitive. The most sensitive were 518A2 melanoma and HT-29 colorectal adenocarcinoma cell lines, with the IC50 values being between 100 and 200 mu M. Decreased rate of TEMPONE reduction and increased production of certain ROS species (peroxynitrite and hydrogen peroxide anion) indicates that free radical metabolism, thus redox status was changed, and antioxidant capacity damaged in the CONP treated 518A2 and HT-29 cells. In conclusion, changes in intracellular redox status induced by CONP are partly attributed to the prooxidant activity of the nanoparticles. Further, ROS induced cell damages might eventually lead to the cell death. However, low inhibitory potential of CONP in the other human cell lines tested indicates that CONP may be safe for human usage in industry and medicine.",
publisher = "Elsevier Ireland Ltd, Clare",
journal = "Chemico-Biological Interactions",
title = "Anti-cancer effects of cerium oxide nanoparticles and its intracellular redox activity",
pages = "93-85",
volume = "232",
doi = "10.1016/j.cbi.2015.03.013"
}

Pesic, M., Podolski-Renic, A., Stojković, S., Matović, B., Zmejkoski, D., Kojić, V., Bogdanović, G., Pavicević, A., Mojović, M., Savić, A. G., Milenković, I., Kalauzi, A.,& Radotić, K.. (2015). Anti-cancer effects of cerium oxide nanoparticles and its intracellular redox activity. in Chemico-Biological Interactions
Elsevier Ireland Ltd, Clare., 232, 85-93.
https://doi.org/10.1016/j.cbi.2015.03.013

Pesic M, Podolski-Renic A, Stojković S, Matović B, Zmejkoski D, Kojić V, Bogdanović G, Pavicević A, Mojović M, Savić AG, Milenković I, Kalauzi A, Radotić K. Anti-cancer effects of cerium oxide nanoparticles and its intracellular redox activity. in Chemico-Biological Interactions. 2015;232:85-93.
doi:10.1016/j.cbi.2015.03.013 .

Pesic, Milica, Podolski-Renic, Ana, Stojković, Sonja, Matović, Branko, Zmejkoski, Danica, Kojić, Vesna, Bogdanović, Gordana, Pavicević, Aleksandra, Mojović, Miloš, Savić, Aleksandar G, Milenković, Ivana, Kalauzi, Aleksandar, Radotić, Ksenija, "Anti-cancer effects of cerium oxide nanoparticles and its intracellular redox activity" in Chemico-Biological Interactions, 232 (2015):85-93,
https://doi.org/10.1016/j.cbi.2015.03.013 . .