TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Uskoković-Marković, Snežana
AU  - Popa, Alexandru
AU  - Jevremović, A
AU  - Nedić-Vasiljević, Bojana
AU  - Milojević-Rakić, Maja
AU  - Bajuk-Bogdanović, Danica
PY  - 2019
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3280
AB  - The current study reports the synthesis, characterization and catalytic activity of tungstophosphoric acid (HPW) and its potassium salts (KH2PW and K3PW) supported on activated carbon (AC). Because potassium salts of tungstophosphoric acid are insoluble, the carbon supported KH2PW and K3PW were prepared by a two step impregnation method. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption. It is observed that all active phases keep their Keggin-type structure after being supported on AC, while their specific surface area is considerably increased by deposition on this porous substrate. The results also indicated that the synthesized materials retained the morphology specific for the support as well as its thermal properties. The adsorption behaviour of the nanocomposites towards nicosulfuron pesticide was found to be particulary good and even slightly improved when compared to pure activated carbon. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 °C. The conversion of ethanol and selectivity toward ethylene and diethyl ether of nanocomposites were compared with the values of bare HPW, KH2PW and K3PW. Results revealed that catalytic activity depends on the catalyst type and active phase loading. The conversion over unsupported catalysts decreased by increasing the cation content per Keggin unit. The nanocomposites with 30 wt% loading of HPW achieved the best conversion of nearly 100% and the highest and stable selectivity toward ethylene. The catalytic activity of nanocomposites with acidic KH2PW showed lower catalytic activity of about 70%, while the nanocomposites of neutral K3PW and AC showed negligible activity.
PB  - Springer Netherlands
T2  - Records of Natural Products
T1  - Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon
DO  - 10.1007/s11144-019-01625-6
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Uskoković-Marković, Snežana and Popa, Alexandru and Jevremović, A and Nedić-Vasiljević, Bojana and Milojević-Rakić, Maja and Bajuk-Bogdanović, Danica",
year = "2019",
abstract = "The current study reports the synthesis, characterization and catalytic activity of tungstophosphoric acid (HPW) and its potassium salts (KH2PW and K3PW) supported on activated carbon (AC). Because potassium salts of tungstophosphoric acid are insoluble, the carbon supported KH2PW and K3PW were prepared by a two step impregnation method. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption. It is observed that all active phases keep their Keggin-type structure after being supported on AC, while their specific surface area is considerably increased by deposition on this porous substrate. The results also indicated that the synthesized materials retained the morphology specific for the support as well as its thermal properties. The adsorption behaviour of the nanocomposites towards nicosulfuron pesticide was found to be particulary good and even slightly improved when compared to pure activated carbon. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 °C. The conversion of ethanol and selectivity toward ethylene and diethyl ether of nanocomposites were compared with the values of bare HPW, KH2PW and K3PW. Results revealed that catalytic activity depends on the catalyst type and active phase loading. The conversion over unsupported catalysts decreased by increasing the cation content per Keggin unit. The nanocomposites with 30 wt% loading of HPW achieved the best conversion of nearly 100% and the highest and stable selectivity toward ethylene. The catalytic activity of nanocomposites with acidic KH2PW showed lower catalytic activity of about 70%, while the nanocomposites of neutral K3PW and AC showed negligible activity.",
publisher = "Springer Netherlands",
journal = "Records of Natural Products",
title = "Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon",
doi = "10.1007/s11144-019-01625-6"
}

Holclajtner-Antunović, I., Uskoković-Marković, S., Popa, A., Jevremović, A., Nedić-Vasiljević, B., Milojević-Rakić, M.,& Bajuk-Bogdanović, D.. (2019). Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon. in Records of Natural Products
Springer Netherlands..
https://doi.org/10.1007/s11144-019-01625-6

Holclajtner-Antunović I, Uskoković-Marković S, Popa A, Jevremović A, Nedić-Vasiljević B, Milojević-Rakić M, Bajuk-Bogdanović D. Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon. in Records of Natural Products. 2019;.
doi:10.1007/s11144-019-01625-6 .

Holclajtner-Antunović, Ivanka, Uskoković-Marković, Snežana, Popa, Alexandru, Jevremović, A, Nedić-Vasiljević, Bojana, Milojević-Rakić, Maja, Bajuk-Bogdanović, Danica, "Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon" in Records of Natural Products (2019),
https://doi.org/10.1007/s11144-019-01625-6 . .

TY  - JOUR
AU  - Jovanović, Svetlana
AU  - Holclajtner-Antunović, Ivanka
AU  - Uskoković-Marković, Snežana
AU  - Bajuk-Bogdanović, Danica
AU  - Pavlović, Vladimir
AU  - Tosić, Dragana
AU  - Milenković, Marina
AU  - Todorović-Marković, Biljana
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3168
AB  - Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coil, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study
VL  - 213
SP  - 157
EP  - 167
DO  - 10.1016/j.matchemphys.2018.04.011
ER  - 

@article{
author = "Jovanović, Svetlana and Holclajtner-Antunović, Ivanka and Uskoković-Marković, Snežana and Bajuk-Bogdanović, Danica and Pavlović, Vladimir and Tosić, Dragana and Milenković, Marina and Todorović-Marković, Biljana",
year = "2018",
abstract = "Antibacterial properties of graphene oxide (GO) have been studied extensively in the last few years, while for polyoxometalates there are just a few researches. Herein, we prepared nanocomposites of GO and different amounts of 12-molybdophosphoric acid (MoPA) and analyzed their antibacterial activity and both structural and morphological properties. In nanocomposites with higher amounts of MoPA, graphene sheets were significantly changed with disrupted flat, graphene-like morphology of GO. In the nanocomposites with low MoPA content, flat GO morphology was preserved. Additionally, structural analyses showed some changes in symmetry of the Keggin anion as a consequence of interactions between GO and MoPA, the increase in structural disorder and the lowering of electron density in GO structure due to interaction with MoPA. We have studied antibacterial properties on the gram-positive: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis; and the gram-negative bacteria: Escherichia coil, Klebsiella pneumoniae, Pseudomonas aeruginosa and Salmonella abony. Only a mild antibacterial effect of GO and nanocomposites with low amount of MoPA against Bacillus subtilis was observed, while the rest of analyzed materials did not show any antibacterial activity.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study",
volume = "213",
pages = "157-167",
doi = "10.1016/j.matchemphys.2018.04.011"
}

Jovanović, S., Holclajtner-Antunović, I., Uskoković-Marković, S., Bajuk-Bogdanović, D., Pavlović, V., Tosić, D., Milenković, M.,& Todorović-Marković, B.. (2018). Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 213, 157-167.
https://doi.org/10.1016/j.matchemphys.2018.04.011

Jovanović S, Holclajtner-Antunović I, Uskoković-Marković S, Bajuk-Bogdanović D, Pavlović V, Tosić D, Milenković M, Todorović-Marković B. Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study. in Materials Chemistry and Physics. 2018;213:157-167.
doi:10.1016/j.matchemphys.2018.04.011 .

Jovanović, Svetlana, Holclajtner-Antunović, Ivanka, Uskoković-Marković, Snežana, Bajuk-Bogdanović, Danica, Pavlović, Vladimir, Tosić, Dragana, Milenković, Marina, Todorović-Marković, Biljana, "Modification of graphene oxide surfaces with 12-molybdophosphoric acid: Structural and antibacterial study" in Materials Chemistry and Physics, 213 (2018):157-167,
https://doi.org/10.1016/j.matchemphys.2018.04.011 . .

TY  - JOUR
AU  - Marić-Stojanović, M.
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
PY  - 2018
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/3205
AB  - The Church of the Holy Mother of God Hodegetria in Pec is decorated with wall paintings that date from the beginning of the 14th century. In terms of style they correspond to Byzantine wall paintings from the epoch of Paleologos. The painting technique and pigment pallete has been examined on micro fragments in thin cross sections by means of optical microscopy (OM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and micro-Raman spectroscopy. Use of the fresco technique and two supporting plaster layers was noted on the majority of samples, while in large blue painted areas, a combination of fresco and secco techniques was used. The SEM-EDS results showed the presence of Ca as the main component of plaster besides the traces of Si and Mg. In some samples egg white as a binder was identified. The paint film is often multilayered. Twelve pigments were identified, mainly natural earth pigments such as red ochre, yellow ochre and green earth. A mixture of pigments was used for attaining desirable optical and aesthetical impressions. As decay product only weddelite was detected in many preparatory and painted samples.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectroscopy Letters
T1  - Spectroscopic analysis of XIV century wall paintings from Patriarchate of Pec Monastery, Serbia
VL  - 191
SP  - 469
EP  - 477
DO  - 10.1016/j.saa.2017.10.043
ER  - 

@article{
author = "Marić-Stojanović, M. and Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka",
year = "2018",
abstract = "The Church of the Holy Mother of God Hodegetria in Pec is decorated with wall paintings that date from the beginning of the 14th century. In terms of style they correspond to Byzantine wall paintings from the epoch of Paleologos. The painting technique and pigment pallete has been examined on micro fragments in thin cross sections by means of optical microscopy (OM), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and micro-Raman spectroscopy. Use of the fresco technique and two supporting plaster layers was noted on the majority of samples, while in large blue painted areas, a combination of fresco and secco techniques was used. The SEM-EDS results showed the presence of Ca as the main component of plaster besides the traces of Si and Mg. In some samples egg white as a binder was identified. The paint film is often multilayered. Twelve pigments were identified, mainly natural earth pigments such as red ochre, yellow ochre and green earth. A mixture of pigments was used for attaining desirable optical and aesthetical impressions. As decay product only weddelite was detected in many preparatory and painted samples.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectroscopy Letters",
title = "Spectroscopic analysis of XIV century wall paintings from Patriarchate of Pec Monastery, Serbia",
volume = "191",
pages = "469-477",
doi = "10.1016/j.saa.2017.10.043"
}

Marić-Stojanović, M., Bajuk-Bogdanović, D., Uskoković-Marković, S.,& Holclajtner-Antunović, I.. (2018). Spectroscopic analysis of XIV century wall paintings from Patriarchate of Pec Monastery, Serbia. in Spectroscopy Letters
Pergamon-Elsevier Science Ltd, Oxford., 191, 469-477.
https://doi.org/10.1016/j.saa.2017.10.043

Marić-Stojanović M, Bajuk-Bogdanović D, Uskoković-Marković S, Holclajtner-Antunović I. Spectroscopic analysis of XIV century wall paintings from Patriarchate of Pec Monastery, Serbia. in Spectroscopy Letters. 2018;191:469-477.
doi:10.1016/j.saa.2017.10.043 .

Marić-Stojanović, M., Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, "Spectroscopic analysis of XIV century wall paintings from Patriarchate of Pec Monastery, Serbia" in Spectroscopy Letters, 191 (2018):469-477,
https://doi.org/10.1016/j.saa.2017.10.043 . .

TY  - JOUR
AU  - Jović, A.
AU  - Bajuk-Bogdanović, Danica
AU  - Nedić-Vasiljević, Bojana
AU  - Milojević-Rakić, Maja
AU  - Krajišnik, Danina
AU  - Dondur, Vera
AU  - Popa, Alexandru
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2932
AB  - An optimized synthetic route for obtaining heteropoly acid (HPA) species supported on BEA zeolite was applied, and different samples, comprising 20 to 50 wt% of 12-phosphotungstic acid (HPW) were prepared. The as-synthesized supported HPW were subjected to different post-synthesis routes, which involved calcination and ultrasound treatment. Characterization of these materials was performed by means of Scanning Electron Microscopy, zeta potential measurements, Infrared Spectroscopy and X-ray Powder Diffraction analysis. Results suggest strong interaction of HPW with the support and revealed that ultrasound treatment resulted in better dispersion of active phase and thus homogeneous morphology of the samples. The zeta potential was found to be dependent on the preparation procedure and HPW content in these materials, while higher HPW loadings induced its agglomeration. Catalytic activity of the synthesized materials was investigated in an ethanol dehydration reaction, where lower HPW loadings induced higher ethanol conversion. Acid sites distribution and accessibility for ethanol molecules were found to be more essential for catalytic activity than HPW loadings, i.e., amount of active sites present in these hybrid materials.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Synthesis and characterization of 12-phosphotungstic acid supported on BEA zeolite
VL  - 186
SP  - 430
EP  - 437
DO  - 10.1016/j.matchemphys.2016.11.015
ER  - 

@article{
author = "Jović, A. and Bajuk-Bogdanović, Danica and Nedić-Vasiljević, Bojana and Milojević-Rakić, Maja and Krajišnik, Danina and Dondur, Vera and Popa, Alexandru and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka",
year = "2017",
abstract = "An optimized synthetic route for obtaining heteropoly acid (HPA) species supported on BEA zeolite was applied, and different samples, comprising 20 to 50 wt% of 12-phosphotungstic acid (HPW) were prepared. The as-synthesized supported HPW were subjected to different post-synthesis routes, which involved calcination and ultrasound treatment. Characterization of these materials was performed by means of Scanning Electron Microscopy, zeta potential measurements, Infrared Spectroscopy and X-ray Powder Diffraction analysis. Results suggest strong interaction of HPW with the support and revealed that ultrasound treatment resulted in better dispersion of active phase and thus homogeneous morphology of the samples. The zeta potential was found to be dependent on the preparation procedure and HPW content in these materials, while higher HPW loadings induced its agglomeration. Catalytic activity of the synthesized materials was investigated in an ethanol dehydration reaction, where lower HPW loadings induced higher ethanol conversion. Acid sites distribution and accessibility for ethanol molecules were found to be more essential for catalytic activity than HPW loadings, i.e., amount of active sites present in these hybrid materials.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Synthesis and characterization of 12-phosphotungstic acid supported on BEA zeolite",
volume = "186",
pages = "430-437",
doi = "10.1016/j.matchemphys.2016.11.015"
}

Jović, A., Bajuk-Bogdanović, D., Nedić-Vasiljević, B., Milojević-Rakić, M., Krajišnik, D., Dondur, V., Popa, A., Uskoković-Marković, S.,& Holclajtner-Antunović, I.. (2017). Synthesis and characterization of 12-phosphotungstic acid supported on BEA zeolite. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 186, 430-437.
https://doi.org/10.1016/j.matchemphys.2016.11.015

Jović A, Bajuk-Bogdanović D, Nedić-Vasiljević B, Milojević-Rakić M, Krajišnik D, Dondur V, Popa A, Uskoković-Marković S, Holclajtner-Antunović I. Synthesis and characterization of 12-phosphotungstic acid supported on BEA zeolite. in Materials Chemistry and Physics. 2017;186:430-437.
doi:10.1016/j.matchemphys.2016.11.015 .

Jović, A., Bajuk-Bogdanović, Danica, Nedić-Vasiljević, Bojana, Milojević-Rakić, Maja, Krajišnik, Danina, Dondur, Vera, Popa, Alexandru, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, "Synthesis and characterization of 12-phosphotungstic acid supported on BEA zeolite" in Materials Chemistry and Physics, 186 (2017):430-437,
https://doi.org/10.1016/j.matchemphys.2016.11.015 . .

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica
AU  - Jović, Aleksandar
AU  - Nedić-Vasiljević, Bojana
AU  - Milojević-Rakić, Maja
AU  - Kragović, Milan
AU  - Krajišnik, Danina
AU  - Holclajtner-Antunović, Ivanka
AU  - Dondur, Vera
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2873
AB  - Tungstophosphoric acid and BEA zeolite composites were synthesized by wetness impregnation, followed by ultrasonication and calcination. Composites were characterized using Raman spectroscopy, thermal analysis and pH-dependent zeta potential. Spectroscopic measurements indicated the interaction of acid and the support by binding of polyanion terminal oxygens and BEA extra framework H+ via hydrogen bonds. Evaluation of prepared composites revealed their higher efficiency in nicosulfuron adsorption, in comparison to parent zeolite. All prepared composites showed excellent adsorption properties for pesticide removal in the range 12.1-25.8 mg of nicosulfuron per gram of investigated sample. Better adsorption capacity was found for sonicated samples in comparison to as-synthesized and calcined ones. It was found that the amount of polyanion in the composites and the extent of the particles surface charge are not crucial for the adsorption application, it is rather the uniformity of the zeolite surface coverage with the polyanion that is was more important.
PB  - Elsevier Science BV, Amsterdam
T2  - Materials Science and Engineering B: Advanced Functional Solid-State Materials
T1  - 12-Tungstophosphoric acid/BEA zeolite composites - Characterization and application for pesticide removal
VL  - 225
SP  - 60
EP  - 67
DO  - 10.1016/j.mseb.2017.08.011
ER  - 

@article{
author = "Bajuk-Bogdanović, Danica and Jović, Aleksandar and Nedić-Vasiljević, Bojana and Milojević-Rakić, Maja and Kragović, Milan and Krajišnik, Danina and Holclajtner-Antunović, Ivanka and Dondur, Vera",
year = "2017",
abstract = "Tungstophosphoric acid and BEA zeolite composites were synthesized by wetness impregnation, followed by ultrasonication and calcination. Composites were characterized using Raman spectroscopy, thermal analysis and pH-dependent zeta potential. Spectroscopic measurements indicated the interaction of acid and the support by binding of polyanion terminal oxygens and BEA extra framework H+ via hydrogen bonds. Evaluation of prepared composites revealed their higher efficiency in nicosulfuron adsorption, in comparison to parent zeolite. All prepared composites showed excellent adsorption properties for pesticide removal in the range 12.1-25.8 mg of nicosulfuron per gram of investigated sample. Better adsorption capacity was found for sonicated samples in comparison to as-synthesized and calcined ones. It was found that the amount of polyanion in the composites and the extent of the particles surface charge are not crucial for the adsorption application, it is rather the uniformity of the zeolite surface coverage with the polyanion that is was more important.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Materials Science and Engineering B: Advanced Functional Solid-State Materials",
title = "12-Tungstophosphoric acid/BEA zeolite composites - Characterization and application for pesticide removal",
volume = "225",
pages = "60-67",
doi = "10.1016/j.mseb.2017.08.011"
}

Bajuk-Bogdanović, D., Jović, A., Nedić-Vasiljević, B., Milojević-Rakić, M., Kragović, M., Krajišnik, D., Holclajtner-Antunović, I.,& Dondur, V.. (2017). 12-Tungstophosphoric acid/BEA zeolite composites - Characterization and application for pesticide removal. in Materials Science and Engineering B: Advanced Functional Solid-State Materials
Elsevier Science BV, Amsterdam., 225, 60-67.
https://doi.org/10.1016/j.mseb.2017.08.011

Bajuk-Bogdanović D, Jović A, Nedić-Vasiljević B, Milojević-Rakić M, Kragović M, Krajišnik D, Holclajtner-Antunović I, Dondur V. 12-Tungstophosphoric acid/BEA zeolite composites - Characterization and application for pesticide removal. in Materials Science and Engineering B: Advanced Functional Solid-State Materials. 2017;225:60-67.
doi:10.1016/j.mseb.2017.08.011 .

Bajuk-Bogdanović, Danica, Jović, Aleksandar, Nedić-Vasiljević, Bojana, Milojević-Rakić, Maja, Kragović, Milan, Krajišnik, Danina, Holclajtner-Antunović, Ivanka, Dondur, Vera, "12-Tungstophosphoric acid/BEA zeolite composites - Characterization and application for pesticide removal" in Materials Science and Engineering B: Advanced Functional Solid-State Materials, 225 (2017):60-67,
https://doi.org/10.1016/j.mseb.2017.08.011 . .

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica
AU  - Popa, Alexandru
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
PY  - 2017
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2879
AB  - Raman and FTIR spectroscopy are powerful techniques used to characterize or observe alterations in the structure or properties of Keggin type heteropoly acids, microporousimesoporous materials, as well as their composites. These methods were applied in this study for investigation of 12-tungstophosphoric acid (WPA) supported as active phase on zeolites (H-BEA and NaY-zeolite) and mesoporous molecular sieves (TiO2, MCM-41, SBA-15). It has been shown that important information on interaction of heteropoly acid and the support can be obtained by the applied vibrational spectroscopic methods. Obtained results show how interaction of WPA with different supports depends on the nature and properties of both, active phase and the support. In the case of microporous supports such as BEA or NaY zeolites, the basicity of the support, i.e., ratio of Si/Al, strongly determines interaction between WPA species and surface of the support. In the case of mesoporous silica supports, WPA is well dispersed over the support without strong interaction. However, TiO2 causes strong and complex interaction with WPA.
PB  - Elsevier Science BV, Amsterdam
T2  - Waste Management & Research
T1  - Vibrational study of interaction between 12-tungstophosphoric acid and microporous/mesoporous supports
VL  - 92
SP  - 151
EP  - 161
DO  - 10.1016/j.vibspec.2017.06.007
ER  - 

@article{
author = "Bajuk-Bogdanović, Danica and Popa, Alexandru and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka",
year = "2017",
abstract = "Raman and FTIR spectroscopy are powerful techniques used to characterize or observe alterations in the structure or properties of Keggin type heteropoly acids, microporousimesoporous materials, as well as their composites. These methods were applied in this study for investigation of 12-tungstophosphoric acid (WPA) supported as active phase on zeolites (H-BEA and NaY-zeolite) and mesoporous molecular sieves (TiO2, MCM-41, SBA-15). It has been shown that important information on interaction of heteropoly acid and the support can be obtained by the applied vibrational spectroscopic methods. Obtained results show how interaction of WPA with different supports depends on the nature and properties of both, active phase and the support. In the case of microporous supports such as BEA or NaY zeolites, the basicity of the support, i.e., ratio of Si/Al, strongly determines interaction between WPA species and surface of the support. In the case of mesoporous silica supports, WPA is well dispersed over the support without strong interaction. However, TiO2 causes strong and complex interaction with WPA.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Waste Management & Research",
title = "Vibrational study of interaction between 12-tungstophosphoric acid and microporous/mesoporous supports",
volume = "92",
pages = "151-161",
doi = "10.1016/j.vibspec.2017.06.007"
}

Bajuk-Bogdanović, D., Popa, A., Uskoković-Marković, S.,& Holclajtner-Antunović, I.. (2017). Vibrational study of interaction between 12-tungstophosphoric acid and microporous/mesoporous supports. in Waste Management & Research
Elsevier Science BV, Amsterdam., 92, 151-161.
https://doi.org/10.1016/j.vibspec.2017.06.007

Bajuk-Bogdanović D, Popa A, Uskoković-Marković S, Holclajtner-Antunović I. Vibrational study of interaction between 12-tungstophosphoric acid and microporous/mesoporous supports. in Waste Management & Research. 2017;92:151-161.
doi:10.1016/j.vibspec.2017.06.007 .

Bajuk-Bogdanović, Danica, Popa, Alexandru, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, "Vibrational study of interaction between 12-tungstophosphoric acid and microporous/mesoporous supports" in Waste Management & Research, 92 (2017):151-161,
https://doi.org/10.1016/j.vibspec.2017.06.007 . .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Stojanović-Marić, Milica
AU  - Bajuk-Bogdanović, Danica
AU  - Zikić, Radisa
AU  - Uskoković-Marković, Snežana
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2586
AB  - The present multi-analytical study concentrates on establishing the painting techniques and the identity of the wall painting materials used by the artists from the 13th and 14th centuries to decorate the Zica monastery, Serbia. For this purpose, we demonstrate that micro-Raman spectroscopy is an efficient, non-destructive method with high spatial resolution which gives molecular and crystal structural information of a wide variety of both inorganic and organic materials. It is shown that elementary composition revealed through scanning electron microscopy with energy dispersive X-ray spectroscopy and energy dispersive X-ray fluorescence spectroscopy is necessary in some cases to confirm the identity of pigments and binders identified by micro-Raman spectroscopy. It was found that a fresco technique, in combination with mainly natural earth pigments such as red ochre, yellow ochre and green earth, was used. Expensive natural pigment lapis lazuli was exclusively used for obtaining blue colour while pure vermilion was used by the artists from the first period of decorations at the beginning of the 13th century. A mixture of pigments was used for attaining different colour shades. For the gilding of saint's haloes, thin golden foil was deposited over the tin sheet. In order to get a desirable optical and aesthetical impression, the metallic leaves were deposited over the yellow ochre preparatory layer. Deposits of gypsum on wall paintings as well as traces of weddellite are degradation products formed as a result of exposing wall paintings to environmental conditions.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectroscopy Letters
T1  - Multi-analytical study of techniques and palettes of wall paintings of the monastery of Zica, Serbia
VL  - 156
SP  - 78
EP  - 88
DO  - 10.1016/j.saa.2015.11.031
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Stojanović-Marić, Milica and Bajuk-Bogdanović, Danica and Zikić, Radisa and Uskoković-Marković, Snežana",
year = "2016",
abstract = "The present multi-analytical study concentrates on establishing the painting techniques and the identity of the wall painting materials used by the artists from the 13th and 14th centuries to decorate the Zica monastery, Serbia. For this purpose, we demonstrate that micro-Raman spectroscopy is an efficient, non-destructive method with high spatial resolution which gives molecular and crystal structural information of a wide variety of both inorganic and organic materials. It is shown that elementary composition revealed through scanning electron microscopy with energy dispersive X-ray spectroscopy and energy dispersive X-ray fluorescence spectroscopy is necessary in some cases to confirm the identity of pigments and binders identified by micro-Raman spectroscopy. It was found that a fresco technique, in combination with mainly natural earth pigments such as red ochre, yellow ochre and green earth, was used. Expensive natural pigment lapis lazuli was exclusively used for obtaining blue colour while pure vermilion was used by the artists from the first period of decorations at the beginning of the 13th century. A mixture of pigments was used for attaining different colour shades. For the gilding of saint's haloes, thin golden foil was deposited over the tin sheet. In order to get a desirable optical and aesthetical impression, the metallic leaves were deposited over the yellow ochre preparatory layer. Deposits of gypsum on wall paintings as well as traces of weddellite are degradation products formed as a result of exposing wall paintings to environmental conditions.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectroscopy Letters",
title = "Multi-analytical study of techniques and palettes of wall paintings of the monastery of Zica, Serbia",
volume = "156",
pages = "78-88",
doi = "10.1016/j.saa.2015.11.031"
}

Holclajtner-Antunović, I., Stojanović-Marić, M., Bajuk-Bogdanović, D., Zikić, R.,& Uskoković-Marković, S.. (2016). Multi-analytical study of techniques and palettes of wall paintings of the monastery of Zica, Serbia. in Spectroscopy Letters
Pergamon-Elsevier Science Ltd, Oxford., 156, 78-88.
https://doi.org/10.1016/j.saa.2015.11.031

Holclajtner-Antunović I, Stojanović-Marić M, Bajuk-Bogdanović D, Zikić R, Uskoković-Marković S. Multi-analytical study of techniques and palettes of wall paintings of the monastery of Zica, Serbia. in Spectroscopy Letters. 2016;156:78-88.
doi:10.1016/j.saa.2015.11.031 .

Holclajtner-Antunović, Ivanka, Stojanović-Marić, Milica, Bajuk-Bogdanović, Danica, Zikić, Radisa, Uskoković-Marković, Snežana, "Multi-analytical study of techniques and palettes of wall paintings of the monastery of Zica, Serbia" in Spectroscopy Letters, 156 (2016):78-88,
https://doi.org/10.1016/j.saa.2015.11.031 . .

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
AU  - Hercigonja, R.
AU  - Popa, Alexandru
AU  - Holclajtner-Antunović, Ivanka
PY  - 2016
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2581
AB  - Micro Raman spectroscopy was applied to investigate the speciation of heteropoly and isopoly molybdates in 0.05 and 0.005 M aqueous solutions of 12-molybdophosphoric acid at pH values between 1 and 6. For comparative purposes, P-31 NMR spectroscopy was applied too. It is shown that stability of Keggin anion is influenced both by pH and concentration of solution. The Keggin structure is stable in acidic solutions (pH  lt  1.6) while defective Keggin structures are formed with further alkalization (up to pH  lt  5.6). Monolacunary anion PMo11O397- is the main component in the pH region from 1.6 to 3.4. Further removal of molybdenyl species causes the appearance of other vacant Keggin structures such as PMo9O31(OH)(3)(6-) and PMo6O259- at about pH 4. At pH 5.0, anion PMo6O259- is the main species. In solutions with pH greater than 5.0, heteropolymolybdates disappear completely and isopolymolybdates Mo7O246- and MoO42- are formed in higher amounts. In more diluted solution of 0.005 M, the decomposition scheme of 12-molybdophosphoric acid solution with increasing of pH takes place without observation of significant amounts of Mo7O246- species. If alkalinization is performed with 0.5 M instead of 5 M NaOH, there are no significant changes in the Raman spectra of solutions. It is shown that the spectra of evaporated samples may be used for the identification of molecular species in corresponding concentrated solutions. However, Raman spectra of dry residues of more diluted solutions differ from spectra of corresponding solutions due to the reactions performed during the process of drying and cannot be used for unambiguous identification of species in solution. Acidification of 0.05 M solution of Na2MoO4 shows that at pH >5.6, molybdate anion MoO42- dominates, while in the pH range between 5.6 and 1, heptamolybdate anion Mo7O246- is preferentially formed.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - Spectroscopy Letters
T1  - Study of the decomposition pathway of 12-molybdophosphoric acid in aqueous solutions by micro Raman spectroscopy
VL  - 153
SP  - 152
EP  - 159
DO  - 10.1016/j.saa.2015.08.029
ER  - 

@article{
author = "Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana and Hercigonja, R. and Popa, Alexandru and Holclajtner-Antunović, Ivanka",
year = "2016",
abstract = "Micro Raman spectroscopy was applied to investigate the speciation of heteropoly and isopoly molybdates in 0.05 and 0.005 M aqueous solutions of 12-molybdophosphoric acid at pH values between 1 and 6. For comparative purposes, P-31 NMR spectroscopy was applied too. It is shown that stability of Keggin anion is influenced both by pH and concentration of solution. The Keggin structure is stable in acidic solutions (pH  lt  1.6) while defective Keggin structures are formed with further alkalization (up to pH  lt  5.6). Monolacunary anion PMo11O397- is the main component in the pH region from 1.6 to 3.4. Further removal of molybdenyl species causes the appearance of other vacant Keggin structures such as PMo9O31(OH)(3)(6-) and PMo6O259- at about pH 4. At pH 5.0, anion PMo6O259- is the main species. In solutions with pH greater than 5.0, heteropolymolybdates disappear completely and isopolymolybdates Mo7O246- and MoO42- are formed in higher amounts. In more diluted solution of 0.005 M, the decomposition scheme of 12-molybdophosphoric acid solution with increasing of pH takes place without observation of significant amounts of Mo7O246- species. If alkalinization is performed with 0.5 M instead of 5 M NaOH, there are no significant changes in the Raman spectra of solutions. It is shown that the spectra of evaporated samples may be used for the identification of molecular species in corresponding concentrated solutions. However, Raman spectra of dry residues of more diluted solutions differ from spectra of corresponding solutions due to the reactions performed during the process of drying and cannot be used for unambiguous identification of species in solution. Acidification of 0.05 M solution of Na2MoO4 shows that at pH >5.6, molybdate anion MoO42- dominates, while in the pH range between 5.6 and 1, heptamolybdate anion Mo7O246- is preferentially formed.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "Spectroscopy Letters",
title = "Study of the decomposition pathway of 12-molybdophosphoric acid in aqueous solutions by micro Raman spectroscopy",
volume = "153",
pages = "152-159",
doi = "10.1016/j.saa.2015.08.029"
}

Bajuk-Bogdanović, D., Uskoković-Marković, S., Hercigonja, R., Popa, A.,& Holclajtner-Antunović, I.. (2016). Study of the decomposition pathway of 12-molybdophosphoric acid in aqueous solutions by micro Raman spectroscopy. in Spectroscopy Letters
Pergamon-Elsevier Science Ltd, Oxford., 153, 152-159.
https://doi.org/10.1016/j.saa.2015.08.029

Bajuk-Bogdanović D, Uskoković-Marković S, Hercigonja R, Popa A, Holclajtner-Antunović I. Study of the decomposition pathway of 12-molybdophosphoric acid in aqueous solutions by micro Raman spectroscopy. in Spectroscopy Letters. 2016;153:152-159.
doi:10.1016/j.saa.2015.08.029 .

Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, Hercigonja, R., Popa, Alexandru, Holclajtner-Antunović, Ivanka, "Study of the decomposition pathway of 12-molybdophosphoric acid in aqueous solutions by micro Raman spectroscopy" in Spectroscopy Letters, 153 (2016):152-159,
https://doi.org/10.1016/j.saa.2015.08.029 . .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Popa, Alexandru
AU  - Nedić-Vasiljević, Bojana
AU  - Krstić, Jugoslav
AU  - Mentus, Slavko
AU  - Uskoković-Marković, Snežana
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2470
AB  - The objective of this study is the structural and morphological characterization of the Ag3PW12O40 salts (AgWPA) of 12-tungstophosphoric acid (WPA) obtained under different preparation conditions and testing of their acid catalytic activity in dehydration of ethanol. The structure, morphology and physicochemical characteristics were determined by Fourier transform infrared (FT-IR) and Raman spectroscopy, X-ray diffraction (XRD), nitrogen physisorption at +/- 196 degrees C, scanning electron microscopy (SEM) and differential thermal (DTA) and thermogravimetric analysis (TGA). It is shown that the preparation process has a significant influence on the morphological properties of the obtained materials which may be explained by the supposed mechanism of the formation of nanocrystallite's aggregates with more or less epitaxial connection. Neutral AgWPA obtained by filtration from supernatant forms porous aggregates of a symmetric dodecahedral shape, having average sizes about 2 mu m. This sample shows higher specific area in comparison with the salt obtained by evaporation due to the higher micropore volume, while mesopore volumes are the same for both salts. Thus conversion of ethanol and selectivities of the main products, ethylene and diethyl ether, are almost the same and constant for both prepared salts, while their values are changed over the reaction time for the parent WPA acid.
PB  - Elsevier Science BV, Amsterdam
T2  - Applied Surface Science
T1  - Structural, morphological and catalytic characterization of neutral Ag salt of 12-tungstophosphoric acid: Influence of preparation conditions
VL  - 328
SP  - 466
EP  - 474
DO  - 10.1016/j.apsusc.2014.12.062
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Popa, Alexandru and Nedić-Vasiljević, Bojana and Krstić, Jugoslav and Mentus, Slavko and Uskoković-Marković, Snežana",
year = "2015",
abstract = "The objective of this study is the structural and morphological characterization of the Ag3PW12O40 salts (AgWPA) of 12-tungstophosphoric acid (WPA) obtained under different preparation conditions and testing of their acid catalytic activity in dehydration of ethanol. The structure, morphology and physicochemical characteristics were determined by Fourier transform infrared (FT-IR) and Raman spectroscopy, X-ray diffraction (XRD), nitrogen physisorption at +/- 196 degrees C, scanning electron microscopy (SEM) and differential thermal (DTA) and thermogravimetric analysis (TGA). It is shown that the preparation process has a significant influence on the morphological properties of the obtained materials which may be explained by the supposed mechanism of the formation of nanocrystallite's aggregates with more or less epitaxial connection. Neutral AgWPA obtained by filtration from supernatant forms porous aggregates of a symmetric dodecahedral shape, having average sizes about 2 mu m. This sample shows higher specific area in comparison with the salt obtained by evaporation due to the higher micropore volume, while mesopore volumes are the same for both salts. Thus conversion of ethanol and selectivities of the main products, ethylene and diethyl ether, are almost the same and constant for both prepared salts, while their values are changed over the reaction time for the parent WPA acid.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Applied Surface Science",
title = "Structural, morphological and catalytic characterization of neutral Ag salt of 12-tungstophosphoric acid: Influence of preparation conditions",
volume = "328",
pages = "466-474",
doi = "10.1016/j.apsusc.2014.12.062"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Popa, A., Nedić-Vasiljević, B., Krstić, J., Mentus, S.,& Uskoković-Marković, S.. (2015). Structural, morphological and catalytic characterization of neutral Ag salt of 12-tungstophosphoric acid: Influence of preparation conditions. in Applied Surface Science
Elsevier Science BV, Amsterdam., 328, 466-474.
https://doi.org/10.1016/j.apsusc.2014.12.062

Holclajtner-Antunović I, Bajuk-Bogdanović D, Popa A, Nedić-Vasiljević B, Krstić J, Mentus S, Uskoković-Marković S. Structural, morphological and catalytic characterization of neutral Ag salt of 12-tungstophosphoric acid: Influence of preparation conditions. in Applied Surface Science. 2015;328:466-474.
doi:10.1016/j.apsusc.2014.12.062 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Popa, Alexandru, Nedić-Vasiljević, Bojana, Krstić, Jugoslav, Mentus, Slavko, Uskoković-Marković, Snežana, "Structural, morphological and catalytic characterization of neutral Ag salt of 12-tungstophosphoric acid: Influence of preparation conditions" in Applied Surface Science, 328 (2015):466-474,
https://doi.org/10.1016/j.apsusc.2014.12.062 . .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Popa, Alexandru
AU  - Sasca, Viorel
AU  - Nedić-Vasiljević, Bojana
AU  - Rakić, Aleksandra
AU  - Uskoković-Marković, Snežana
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2460
AB  - The current study reports the synthesis and characterization of tungstophosphoric acid and its acid silver salt supported on mesoporous molecular sieve SBA-15 and TiO2. Because silver salts are partially insoluble, the SBA-15 and TiO2 supported silver acid salts were prepared by two step sequential impregnations. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption at -196 degrees C. It is observed that both active phases keep their Keggin-type structure after being supported on the supports while their specific surface area is considerably increased by deposition on mesoporous substrates. The results also indicated that the synthesized catalysts retained the morphology specific for each of the supports, while their thermal stability is increased in comparison with their active phases. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 degrees C. Results revealed that all the catalysts show considerably improved catalytic activity in comparison to the bulk active phases.
PB  - Elsevier Science Sa, Lausanne
T2  - Materials Chemistry and Physics
T1  - Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites
VL  - 160
SP  - 359
EP  - 368
DO  - 10.1016/j.matchemphys.2015.04.052
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Popa, Alexandru and Sasca, Viorel and Nedić-Vasiljević, Bojana and Rakić, Aleksandra and Uskoković-Marković, Snežana",
year = "2015",
abstract = "The current study reports the synthesis and characterization of tungstophosphoric acid and its acid silver salt supported on mesoporous molecular sieve SBA-15 and TiO2. Because silver salts are partially insoluble, the SBA-15 and TiO2 supported silver acid salts were prepared by two step sequential impregnations. The synthesized catalysts were characterized by various physicochemical methods such as Fourier transform infrared and Raman spectroscopy, differential thermal analysis, thermogravimetric analysis, X-ray diffraction, scanning electron microscopy and nitrogen physisorption at -196 degrees C. It is observed that both active phases keep their Keggin-type structure after being supported on the supports while their specific surface area is considerably increased by deposition on mesoporous substrates. The results also indicated that the synthesized catalysts retained the morphology specific for each of the supports, while their thermal stability is increased in comparison with their active phases. The catalytic activity of the prepared catalysts was probed for the vapor phase dehydration of ethanol at 300 degrees C. Results revealed that all the catalysts show considerably improved catalytic activity in comparison to the bulk active phases.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Materials Chemistry and Physics",
title = "Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites",
volume = "160",
pages = "359-368",
doi = "10.1016/j.matchemphys.2015.04.052"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Popa, A., Sasca, V., Nedić-Vasiljević, B., Rakić, A.,& Uskoković-Marković, S.. (2015). Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites. in Materials Chemistry and Physics
Elsevier Science Sa, Lausanne., 160, 359-368.
https://doi.org/10.1016/j.matchemphys.2015.04.052

Holclajtner-Antunović I, Bajuk-Bogdanović D, Popa A, Sasca V, Nedić-Vasiljević B, Rakić A, Uskoković-Marković S. Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites. in Materials Chemistry and Physics. 2015;160:359-368.
doi:10.1016/j.matchemphys.2015.04.052 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Popa, Alexandru, Sasca, Viorel, Nedić-Vasiljević, Bojana, Rakić, Aleksandra, Uskoković-Marković, Snežana, "Preparation, characterization and catalytic activity of mesoporous Ag2HPW12O40/SBA-15 and Ag2HPW12O40/TiO2 composites" in Materials Chemistry and Physics, 160 (2015):359-368,
https://doi.org/10.1016/j.matchemphys.2015.04.052 . .

TY  - JOUR
AU  - Bajuk-Bogdanović, Danica
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
PY  - 2015
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2378
AB  - Heteropoly acids (HPA) attract the attention of large variety of scientists, due to HPA's extraordinary interesting properties and possible application fields. 12-tungstosilicic acid (WSiA), the Keggin type HPA, has some promising characteristic to be used in catalytic processes, but with not well-defined stability. Raman spectroscopy was used for in situ analysis of WSiA hydrolysis in detail in a wide pH range of 1-12. Raman spectroscopy is able to give an almost immediate response/spectrum as a representation of the exact profile/composition of the solution. This method and FTIR spectroscopy, as a complementary technique, enabled recording of the solid and liquid phases of the same sample under different conditions. Our results confirm that the decomposition pathways of WSiA in solution proceed via the formation of the lacunary monovacant anion at pH > 6.4. This anion is a major constituent in pH range up to 9.5. With further increases in pH this species convert to the trivacant lacunary anion. The total decomposition of the Keggin anion to silicate and tungstate occurs at pH > 11.0. The results of the performed study contribute to understand the behavior of WSiA in the water-methanol solution, as the model system of aqueous-organic system. It is concluded that addition of methanol in aqueous solution of WSiA leads to expansion of the pH region where Keggin anion is stable up to 8.1 and above this pH value, precipitation occurs. The obtained data clarify the stability range of WSiA in both water and water-methanol solutions, as well.
PB  - Springer, New York
T2  - Journal of the Iranian Chemical Society
T1  - Vibration Spectroscopy Stability Investigation of 12-Tungstosilicic Acid Solution
VL  - 12
IS  - 1
SP  - 137
EP  - 145
DO  - 10.1007/s13738-014-0466-y
ER  - 

@article{
author = "Bajuk-Bogdanović, Danica and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka",
year = "2015",
abstract = "Heteropoly acids (HPA) attract the attention of large variety of scientists, due to HPA's extraordinary interesting properties and possible application fields. 12-tungstosilicic acid (WSiA), the Keggin type HPA, has some promising characteristic to be used in catalytic processes, but with not well-defined stability. Raman spectroscopy was used for in situ analysis of WSiA hydrolysis in detail in a wide pH range of 1-12. Raman spectroscopy is able to give an almost immediate response/spectrum as a representation of the exact profile/composition of the solution. This method and FTIR spectroscopy, as a complementary technique, enabled recording of the solid and liquid phases of the same sample under different conditions. Our results confirm that the decomposition pathways of WSiA in solution proceed via the formation of the lacunary monovacant anion at pH > 6.4. This anion is a major constituent in pH range up to 9.5. With further increases in pH this species convert to the trivacant lacunary anion. The total decomposition of the Keggin anion to silicate and tungstate occurs at pH > 11.0. The results of the performed study contribute to understand the behavior of WSiA in the water-methanol solution, as the model system of aqueous-organic system. It is concluded that addition of methanol in aqueous solution of WSiA leads to expansion of the pH region where Keggin anion is stable up to 8.1 and above this pH value, precipitation occurs. The obtained data clarify the stability range of WSiA in both water and water-methanol solutions, as well.",
publisher = "Springer, New York",
journal = "Journal of the Iranian Chemical Society",
title = "Vibration Spectroscopy Stability Investigation of 12-Tungstosilicic Acid Solution",
volume = "12",
number = "1",
pages = "137-145",
doi = "10.1007/s13738-014-0466-y"
}

Bajuk-Bogdanović, D., Uskoković-Marković, S.,& Holclajtner-Antunović, I.. (2015). Vibration Spectroscopy Stability Investigation of 12-Tungstosilicic Acid Solution. in Journal of the Iranian Chemical Society
Springer, New York., 12(1), 137-145.
https://doi.org/10.1007/s13738-014-0466-y

Bajuk-Bogdanović D, Uskoković-Marković S, Holclajtner-Antunović I. Vibration Spectroscopy Stability Investigation of 12-Tungstosilicic Acid Solution. in Journal of the Iranian Chemical Society. 2015;12(1):137-145.
doi:10.1007/s13738-014-0466-y .

Bajuk-Bogdanović, Danica, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, "Vibration Spectroscopy Stability Investigation of 12-Tungstosilicic Acid Solution" in Journal of the Iranian Chemical Society, 12, no. 1 (2015):137-145,
https://doi.org/10.1007/s13738-014-0466-y . .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Brborić, Jasmina
AU  - Holclajtner-Antunović, Ivanka
AU  - Uskoković-Marković, Snežana
PY  - 2014
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/2256
PB  - Vojnomedicinska akademija - Institut za naučne informacije, Beograd
T2  - Vojnosanitetski pregled
T1  - Evaluating the bioactive effects of flavonoid hesperidin: A new literature data survey
T1  - Ocena bioaktivnih efekata flavonoida hesperidina - pregled podataka iz novije literature
VL  - 71
IS  - 1
SP  - 60
EP  - 65
DO  - 10.2298/VSP1401060K
ER  - 

@article{
author = "Kuntić, Vesna and Brborić, Jasmina and Holclajtner-Antunović, Ivanka and Uskoković-Marković, Snežana",
year = "2014",
publisher = "Vojnomedicinska akademija - Institut za naučne informacije, Beograd",
journal = "Vojnosanitetski pregled",
title = "Evaluating the bioactive effects of flavonoid hesperidin: A new literature data survey, Ocena bioaktivnih efekata flavonoida hesperidina - pregled podataka iz novije literature",
volume = "71",
number = "1",
pages = "60-65",
doi = "10.2298/VSP1401060K"
}

Kuntić, V., Brborić, J., Holclajtner-Antunović, I.,& Uskoković-Marković, S.. (2014). Evaluating the bioactive effects of flavonoid hesperidin: A new literature data survey. in Vojnosanitetski pregled
Vojnomedicinska akademija - Institut za naučne informacije, Beograd., 71(1), 60-65.
https://doi.org/10.2298/VSP1401060K

Kuntić V, Brborić J, Holclajtner-Antunović I, Uskoković-Marković S. Evaluating the bioactive effects of flavonoid hesperidin: A new literature data survey. in Vojnosanitetski pregled. 2014;71(1):60-65.
doi:10.2298/VSP1401060K .

Kuntić, Vesna, Brborić, Jasmina, Holclajtner-Antunović, Ivanka, Uskoković-Marković, Snežana, "Evaluating the bioactive effects of flavonoid hesperidin: A new literature data survey" in Vojnosanitetski pregled, 71, no. 1 (2014):60-65,
https://doi.org/10.2298/VSP1401060K . .

TY  - JOUR
AU  - Daković, Marko
AU  - Stojiljković, Aleksandra S.
AU  - Bajuk-Bogdanović, Danica
AU  - Starcević, Ana
AU  - Puskas, Laslo
AU  - Filipović, Branislav
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1883
AB  - Raman spectroscopy enables non-invasive investigation of chemical composition of biological tissues. Due to similar chemical composition, the analysis of Raman spectra of brain structures and assignment of their spectral features to chemical constituents presents a particular challenge. In this study we demonstrate that standard and independent component analysis of Raman spectra is capable of assessment of differences in chemical composition between functionally related gray and white matter structures. Our results show the ability of Raman spectroscopy to successfully depict variation in chemical composition between structurally similar and/or functionally connected brain structures. The observed differences were attributed to variations in content of proteins and lipids in these structures. Independent component analysis enabled separation of contributions of major constituents in spectra and revealed spectral signatures of low-concentration metabolites. This provided finding of discrepancies between structures of striatum as well as between white matter structures. Raman spectroscopy can provide information about variations in contents of major chemical constituents in brain structures, while the application of independent component analysis performed on obtained spectra can help in revealing minute differences between closely related brain structures.
PB  - Elsevier Science BV, Amsterdam
T2  - Talanta
T1  - Profiling differences in chemical composition of brain structures using Raman spectroscopy
VL  - 117
SP  - 133
EP  - 138
DO  - 10.1016/j.talanta.2013.08.058
ER  - 

@article{
author = "Daković, Marko and Stojiljković, Aleksandra S. and Bajuk-Bogdanović, Danica and Starcević, Ana and Puskas, Laslo and Filipović, Branislav and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka",
year = "2013",
abstract = "Raman spectroscopy enables non-invasive investigation of chemical composition of biological tissues. Due to similar chemical composition, the analysis of Raman spectra of brain structures and assignment of their spectral features to chemical constituents presents a particular challenge. In this study we demonstrate that standard and independent component analysis of Raman spectra is capable of assessment of differences in chemical composition between functionally related gray and white matter structures. Our results show the ability of Raman spectroscopy to successfully depict variation in chemical composition between structurally similar and/or functionally connected brain structures. The observed differences were attributed to variations in content of proteins and lipids in these structures. Independent component analysis enabled separation of contributions of major constituents in spectra and revealed spectral signatures of low-concentration metabolites. This provided finding of discrepancies between structures of striatum as well as between white matter structures. Raman spectroscopy can provide information about variations in contents of major chemical constituents in brain structures, while the application of independent component analysis performed on obtained spectra can help in revealing minute differences between closely related brain structures.",
publisher = "Elsevier Science BV, Amsterdam",
journal = "Talanta",
title = "Profiling differences in chemical composition of brain structures using Raman spectroscopy",
volume = "117",
pages = "133-138",
doi = "10.1016/j.talanta.2013.08.058"
}

Daković, M., Stojiljković, A. S., Bajuk-Bogdanović, D., Starcević, A., Puskas, L., Filipović, B., Uskoković-Marković, S.,& Holclajtner-Antunović, I.. (2013). Profiling differences in chemical composition of brain structures using Raman spectroscopy. in Talanta
Elsevier Science BV, Amsterdam., 117, 133-138.
https://doi.org/10.1016/j.talanta.2013.08.058

Daković M, Stojiljković AS, Bajuk-Bogdanović D, Starcević A, Puskas L, Filipović B, Uskoković-Marković S, Holclajtner-Antunović I. Profiling differences in chemical composition of brain structures using Raman spectroscopy. in Talanta. 2013;117:133-138.
doi:10.1016/j.talanta.2013.08.058 .

Daković, Marko, Stojiljković, Aleksandra S., Bajuk-Bogdanović, Danica, Starcević, Ana, Puskas, Laslo, Filipović, Branislav, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, "Profiling differences in chemical composition of brain structures using Raman spectroscopy" in Talanta, 117 (2013):133-138,
https://doi.org/10.1016/j.talanta.2013.08.058 . .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Popa, Alexandru
AU  - Bajuk-Bogdanović, Danica
AU  - Mentus, Slavko
AU  - Nedić-Vasiljević, Bojana
AU  - Uskoković-Marković, Snežana
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1872
AB  - The silver acid salts AgxH3-xPW12O40 (Ag(x)WPA), where Ag content is x = 1 up to x = 2.5, were synthesized and characterized by Fourier transform infrared and micro-Raman spectroscopy, powder X-ray diffraction and differential thermal and thermogravimetric analysis and nitrogen adsorption. The properties of the prepared salts are compared with those of the parent acid. Regarding the structural, textural and thermal and solubility characteristics, these salts are between salts of group A, with small metal ions, and B group salts with large metal ions. The acid salts are two phase mixtures of soluble acid and insoluble neutral salt, like other alkaline acid salts of H3PW12O40 for x  lt  2. The catalytic properties of the acid salts have been studied for the vapor-phase dehydration of ethanol, carried out in a conventional flow-type reactor at 300 degrees C. The acid salts exhibited stable catalytic activity, a little bit lower than tungstophosphoric acid for ethylene production from ethanol.
PB  - Elsevier Science Sa, Lausanne
T2  - Inorganica Chimica Acta
T1  - Synthesis and characterization of acid silver salts of 12-tungstophosphoric acid
VL  - 407
SP  - 197
EP  - 203
DO  - 10.1016/j.ica.2013.07.035
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Popa, Alexandru and Bajuk-Bogdanović, Danica and Mentus, Slavko and Nedić-Vasiljević, Bojana and Uskoković-Marković, Snežana",
year = "2013",
abstract = "The silver acid salts AgxH3-xPW12O40 (Ag(x)WPA), where Ag content is x = 1 up to x = 2.5, were synthesized and characterized by Fourier transform infrared and micro-Raman spectroscopy, powder X-ray diffraction and differential thermal and thermogravimetric analysis and nitrogen adsorption. The properties of the prepared salts are compared with those of the parent acid. Regarding the structural, textural and thermal and solubility characteristics, these salts are between salts of group A, with small metal ions, and B group salts with large metal ions. The acid salts are two phase mixtures of soluble acid and insoluble neutral salt, like other alkaline acid salts of H3PW12O40 for x  lt  2. The catalytic properties of the acid salts have been studied for the vapor-phase dehydration of ethanol, carried out in a conventional flow-type reactor at 300 degrees C. The acid salts exhibited stable catalytic activity, a little bit lower than tungstophosphoric acid for ethylene production from ethanol.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Inorganica Chimica Acta",
title = "Synthesis and characterization of acid silver salts of 12-tungstophosphoric acid",
volume = "407",
pages = "197-203",
doi = "10.1016/j.ica.2013.07.035"
}

Holclajtner-Antunović, I., Popa, A., Bajuk-Bogdanović, D., Mentus, S., Nedić-Vasiljević, B.,& Uskoković-Marković, S.. (2013). Synthesis and characterization of acid silver salts of 12-tungstophosphoric acid. in Inorganica Chimica Acta
Elsevier Science Sa, Lausanne., 407, 197-203.
https://doi.org/10.1016/j.ica.2013.07.035

Holclajtner-Antunović I, Popa A, Bajuk-Bogdanović D, Mentus S, Nedić-Vasiljević B, Uskoković-Marković S. Synthesis and characterization of acid silver salts of 12-tungstophosphoric acid. in Inorganica Chimica Acta. 2013;407:197-203.
doi:10.1016/j.ica.2013.07.035 .

Holclajtner-Antunović, Ivanka, Popa, Alexandru, Bajuk-Bogdanović, Danica, Mentus, Slavko, Nedić-Vasiljević, Bojana, Uskoković-Marković, Snežana, "Synthesis and characterization of acid silver salts of 12-tungstophosphoric acid" in Inorganica Chimica Acta, 407 (2013):197-203,
https://doi.org/10.1016/j.ica.2013.07.035 . .

TY  - JOUR
AU  - Uskoković-Marković, Snežana
AU  - Jelikić-Stankov, Milena
AU  - Holclajtner-Antunović, Ivanka
AU  - Đurđević, Predrag
PY  - 2013
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1908
AB  - In this review, Raman spectroscopy is described as a new and potentially powerful diagnostic tool in comparison to routine biochemical tests. Advanced instrumentation and new Raman spectroscopy techniques enable rapid and simultaneous identification and/or determination of several biochemical parameters, such as glucose, acetone, creatinine, urea, lipid profile, uric acid, total protein, etc., with a very low limit of detection. Raman spectroscopy could also be applied in molecule and cell characterization, as well as diagnostics of atherosclerosis in its early stage. Raman spectroscopy is nondestructive and could be applied to all kinds of samples, which simplifies the diagnostics of numerous diseases and pathologic states. Special attention is paid to literature data illustrating the application of Raman spectroscopy for transdermal glucose monitoring and cancer diagnostics.
AB  - U ovom prikazu opisana je primena Ramanske spektroskopije kao nove metode velikih mogućnosti u dijagnostici, u poređenju sa rutinskim biohemijskim testovima. Metoda je razvijena i usavršena za identifikaciju i/ili određivanje velikog broja biohemijskih parametara, kao što su glukoza, aceton, kreatinin, urea, lipidni profil, mokraćna kiselina, ukupni proteini i drugi, uz veoma nizak limit detekcije. Ramanska spektroskopija takođe se može primenjivati u molekulskoj i ćelijskoj karakterizaciji, kao i za dijagnostiku ranog stadijuma ateroskleroze. Ramanska spektroskopija je nedestruktivna i može se primenjivati na sve vrste uzoraka, što pojednostavljuje dijagnostiku brojnih bolesti i patoloških stanja. Posebna pažnja u radu je posvećena podacima iz literature koji ilustruju primenu Ramanske spektroskopije u transdermalnom monitoringu glukoze i dijagnostici kancera.
PB  - Društvo medicinskih biohemičara Srbije, Beograd i Versita
T2  - Journal of Medical Biochemistry
T1  - Raman spectroscopy as a new biochemical diagnostic tool
T1  - Ramanska spektroskopija kao novo biohemijsko dijagnostičko sredstvo
VL  - 32
IS  - 2
SP  - 96
EP  - 103
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1908
ER  - 

@article{
author = "Uskoković-Marković, Snežana and Jelikić-Stankov, Milena and Holclajtner-Antunović, Ivanka and Đurđević, Predrag",
year = "2013",
abstract = "In this review, Raman spectroscopy is described as a new and potentially powerful diagnostic tool in comparison to routine biochemical tests. Advanced instrumentation and new Raman spectroscopy techniques enable rapid and simultaneous identification and/or determination of several biochemical parameters, such as glucose, acetone, creatinine, urea, lipid profile, uric acid, total protein, etc., with a very low limit of detection. Raman spectroscopy could also be applied in molecule and cell characterization, as well as diagnostics of atherosclerosis in its early stage. Raman spectroscopy is nondestructive and could be applied to all kinds of samples, which simplifies the diagnostics of numerous diseases and pathologic states. Special attention is paid to literature data illustrating the application of Raman spectroscopy for transdermal glucose monitoring and cancer diagnostics., U ovom prikazu opisana je primena Ramanske spektroskopije kao nove metode velikih mogućnosti u dijagnostici, u poređenju sa rutinskim biohemijskim testovima. Metoda je razvijena i usavršena za identifikaciju i/ili određivanje velikog broja biohemijskih parametara, kao što su glukoza, aceton, kreatinin, urea, lipidni profil, mokraćna kiselina, ukupni proteini i drugi, uz veoma nizak limit detekcije. Ramanska spektroskopija takođe se može primenjivati u molekulskoj i ćelijskoj karakterizaciji, kao i za dijagnostiku ranog stadijuma ateroskleroze. Ramanska spektroskopija je nedestruktivna i može se primenjivati na sve vrste uzoraka, što pojednostavljuje dijagnostiku brojnih bolesti i patoloških stanja. Posebna pažnja u radu je posvećena podacima iz literature koji ilustruju primenu Ramanske spektroskopije u transdermalnom monitoringu glukoze i dijagnostici kancera.",
publisher = "Društvo medicinskih biohemičara Srbije, Beograd i Versita",
journal = "Journal of Medical Biochemistry",
title = "Raman spectroscopy as a new biochemical diagnostic tool, Ramanska spektroskopija kao novo biohemijsko dijagnostičko sredstvo",
volume = "32",
number = "2",
pages = "96-103",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1908"
}

Uskoković-Marković, S., Jelikić-Stankov, M., Holclajtner-Antunović, I.,& Đurđević, P.. (2013). Raman spectroscopy as a new biochemical diagnostic tool. in Journal of Medical Biochemistry
Društvo medicinskih biohemičara Srbije, Beograd i Versita., 32(2), 96-103.
https://hdl.handle.net/21.15107/rcub_farfar_1908

Uskoković-Marković S, Jelikić-Stankov M, Holclajtner-Antunović I, Đurđević P. Raman spectroscopy as a new biochemical diagnostic tool. in Journal of Medical Biochemistry. 2013;32(2):96-103.
https://hdl.handle.net/21.15107/rcub_farfar_1908 .

Uskoković-Marković, Snežana, Jelikić-Stankov, Milena, Holclajtner-Antunović, Ivanka, Đurđević, Predrag, "Raman spectroscopy as a new biochemical diagnostic tool" in Journal of Medical Biochemistry, 32, no. 2 (2013):96-103,
https://hdl.handle.net/21.15107/rcub_farfar_1908 .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Popa, Alexandru
AU  - Uskoković-Marković, Snežana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1717
AB  - The various molecular species formed by decomposition of 12-tungstophosphoric acid (WPA) in methanol/water solutions of different composition, and over a pH range 1-12, were identified by UV, FTIR, micro Raman and P-31 NMR spectroscopy. The dependence of stability on organic solvent amount, pH and concentration of WPA in solution is investigated in detail. It is shown that addition of methanol in aqueous solution of WPA with varied pH causes extension of the pH region where parent Keggin anion is stable. While Keggin anion is preserved in aqueous solution with pH  lt 2, in solution with 25% of methanol it is stable up to pH 2.5, in solution with 50% of methanol up to pH 3.5, and in solution with 75% of methanol Keggin anion is observed up to pH 4.5. Various molecular species, such as monovacant and trivacant lacunary Keggin structures and dimeric Wells-Dawson derivatives, are observed as a result of Keggin anion destruction with increasing of pH, but speciation in both aqueous and methanol/water solutions is similar. It is also shown that lacunary anions are less soluble in solutions with higher methanol content and with higher pH. In aqueous solution at pH >8, the solution contains only tungstates and phosphates with no precipitation. In solution with 25% of methanol, precipitate is formed at pH 8.0 and contains trivacant lacunary Keggin anion. In solution with 50% of methanol the precipitation is at pH 6.5, and in solution with 75% of methanol it is observed at pH 4.5, but in both solutions the precipitate contains monovacant lacunary anion as the main component.
PB  - Elsevier Science Sa, Lausanne
T2  - Inorganica Chimica Acta
T1  - Spectroscopic identification of molecular species of 12-tungstophosphoric acid in methanol/water solutions
VL  - 383
SP  - 26
EP  - 32
DO  - 10.1016/j.ica.2011.10.035
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Popa, Alexandru and Uskoković-Marković, Snežana",
year = "2012",
abstract = "The various molecular species formed by decomposition of 12-tungstophosphoric acid (WPA) in methanol/water solutions of different composition, and over a pH range 1-12, were identified by UV, FTIR, micro Raman and P-31 NMR spectroscopy. The dependence of stability on organic solvent amount, pH and concentration of WPA in solution is investigated in detail. It is shown that addition of methanol in aqueous solution of WPA with varied pH causes extension of the pH region where parent Keggin anion is stable. While Keggin anion is preserved in aqueous solution with pH  lt 2, in solution with 25% of methanol it is stable up to pH 2.5, in solution with 50% of methanol up to pH 3.5, and in solution with 75% of methanol Keggin anion is observed up to pH 4.5. Various molecular species, such as monovacant and trivacant lacunary Keggin structures and dimeric Wells-Dawson derivatives, are observed as a result of Keggin anion destruction with increasing of pH, but speciation in both aqueous and methanol/water solutions is similar. It is also shown that lacunary anions are less soluble in solutions with higher methanol content and with higher pH. In aqueous solution at pH >8, the solution contains only tungstates and phosphates with no precipitation. In solution with 25% of methanol, precipitate is formed at pH 8.0 and contains trivacant lacunary Keggin anion. In solution with 50% of methanol the precipitation is at pH 6.5, and in solution with 75% of methanol it is observed at pH 4.5, but in both solutions the precipitate contains monovacant lacunary anion as the main component.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Inorganica Chimica Acta",
title = "Spectroscopic identification of molecular species of 12-tungstophosphoric acid in methanol/water solutions",
volume = "383",
pages = "26-32",
doi = "10.1016/j.ica.2011.10.035"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Popa, A.,& Uskoković-Marković, S.. (2012). Spectroscopic identification of molecular species of 12-tungstophosphoric acid in methanol/water solutions. in Inorganica Chimica Acta
Elsevier Science Sa, Lausanne., 383, 26-32.
https://doi.org/10.1016/j.ica.2011.10.035

Holclajtner-Antunović I, Bajuk-Bogdanović D, Popa A, Uskoković-Marković S. Spectroscopic identification of molecular species of 12-tungstophosphoric acid in methanol/water solutions. in Inorganica Chimica Acta. 2012;383:26-32.
doi:10.1016/j.ica.2011.10.035 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Popa, Alexandru, Uskoković-Marković, Snežana, "Spectroscopic identification of molecular species of 12-tungstophosphoric acid in methanol/water solutions" in Inorganica Chimica Acta, 383 (2012):26-32,
https://doi.org/10.1016/j.ica.2011.10.035 . .

TY  - CONF
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Popa, Alexandru
AU  - Uskoković-Marković, Snežana
PY  - 2012
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1664
PB  - Amer Chemical Soc, Washington
C3  - Abstracts of Papers of the American Chemical Society
T1  - Behavior of tungtophosphoric Keggin anion in methanol/water solutions followed by spectroscopic techniques
VL  - 243
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1664
ER  - 

@conference{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Popa, Alexandru and Uskoković-Marković, Snežana",
year = "2012",
publisher = "Amer Chemical Soc, Washington",
journal = "Abstracts of Papers of the American Chemical Society",
title = "Behavior of tungtophosphoric Keggin anion in methanol/water solutions followed by spectroscopic techniques",
volume = "243",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1664"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Popa, A.,& Uskoković-Marković, S.. (2012). Behavior of tungtophosphoric Keggin anion in methanol/water solutions followed by spectroscopic techniques. in Abstracts of Papers of the American Chemical Society
Amer Chemical Soc, Washington., 243.
https://hdl.handle.net/21.15107/rcub_farfar_1664

Holclajtner-Antunović I, Bajuk-Bogdanović D, Popa A, Uskoković-Marković S. Behavior of tungtophosphoric Keggin anion in methanol/water solutions followed by spectroscopic techniques. in Abstracts of Papers of the American Chemical Society. 2012;243.
https://hdl.handle.net/21.15107/rcub_farfar_1664 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Popa, Alexandru, Uskoković-Marković, Snežana, "Behavior of tungtophosphoric Keggin anion in methanol/water solutions followed by spectroscopic techniques" in Abstracts of Papers of the American Chemical Society, 243 (2012),
https://hdl.handle.net/21.15107/rcub_farfar_1664 .

TY  - JOUR
AU  - Uskoković-Marković, Snežana
AU  - Milenković, Marina
AU  - Topić, Aleksandra
AU  - Kotur-Stevuljević, Jelena
AU  - Stefanović, Aleksandra
AU  - Antić-Stanković, Jelena
AU  - Holclajtner-Antunović, Ivanka
PY  - 2009
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1312
AB  - Tungstates and polyoxotungstates have been known to be bioactive compounds for a long time. Based on our previous work about sodium tungstate (ST) and 12-tungstophosphoric acid (WPA) as hepatoprotective agents, we performed a seven week long experiment in rats, using ST and WPA pretreatments in thioacetamide (TAA) induced acute liver necrosis. The possible influences of dimethyl sulfoxide (DMSO), given orally for 3 consecutive days before inducing hepatic lesions, were also investigated. The effects were evaluated by the activity of serum enzymes, oxidative stress parameters, antioxidative defense markers, and histopathology in Wistar rats. The obtained results suggest that oral pretreatment with tungstates, especially ST, in combination with DMSO, before the TAA inducted liver necrosis, could be useful for the prevention of hepatic injury in rats.
AB  - Volframati i polioksovolframati su decenijama poznati kao biološki aktivna jedinjenja. Kao nastavak prethodnog istraživanja hepatoprotektivnog efekta natrijum volframata (ST) i 12-volframfosforne kiseline (WPA), izveden je eksperiment na Wistar pacovima, koji su pretretirani sa ST i WPA tokom sedam nedelja a nakon tog perioda im je intraperitonealno ubrizgan tioacetamid (TAA) u cilju indukovanja akutne nekroze jetre. Ispitivan je uticaj dimetil sulfoksida (DMSO), koji je primenjivan per os u toku 3 konsekutativna dana pre indukcije hepatične nekroze. Efekti su evaluirani praćenjem aktivnosti serumskih enzima, parametara oksidativnog stresa, antioksidativnog odbrambenog markera, kao i histopatološkom analizom tkiva jetre. Dobijeni rezultati ukazuju da oralni pretretman pacova sa volframatima, pre svega ST, u kombinaciji sa DMSO, može biti koristan u prevenciji nekroze jetre indukovane tioacetamidom.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Beneficial effects of dimethyl sulfoxide on tungstates hepatoprotecitve activity
T1  - Pozitivan učinak dimetilsulfoksida na hepatoprotektivnu aktivnost volframata
VL  - 59
IS  - 4
SP  - 265
EP  - 278
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1312
ER  - 

@article{
author = "Uskoković-Marković, Snežana and Milenković, Marina and Topić, Aleksandra and Kotur-Stevuljević, Jelena and Stefanović, Aleksandra and Antić-Stanković, Jelena and Holclajtner-Antunović, Ivanka",
year = "2009",
abstract = "Tungstates and polyoxotungstates have been known to be bioactive compounds for a long time. Based on our previous work about sodium tungstate (ST) and 12-tungstophosphoric acid (WPA) as hepatoprotective agents, we performed a seven week long experiment in rats, using ST and WPA pretreatments in thioacetamide (TAA) induced acute liver necrosis. The possible influences of dimethyl sulfoxide (DMSO), given orally for 3 consecutive days before inducing hepatic lesions, were also investigated. The effects were evaluated by the activity of serum enzymes, oxidative stress parameters, antioxidative defense markers, and histopathology in Wistar rats. The obtained results suggest that oral pretreatment with tungstates, especially ST, in combination with DMSO, before the TAA inducted liver necrosis, could be useful for the prevention of hepatic injury in rats., Volframati i polioksovolframati su decenijama poznati kao biološki aktivna jedinjenja. Kao nastavak prethodnog istraživanja hepatoprotektivnog efekta natrijum volframata (ST) i 12-volframfosforne kiseline (WPA), izveden je eksperiment na Wistar pacovima, koji su pretretirani sa ST i WPA tokom sedam nedelja a nakon tog perioda im je intraperitonealno ubrizgan tioacetamid (TAA) u cilju indukovanja akutne nekroze jetre. Ispitivan je uticaj dimetil sulfoksida (DMSO), koji je primenjivan per os u toku 3 konsekutativna dana pre indukcije hepatične nekroze. Efekti su evaluirani praćenjem aktivnosti serumskih enzima, parametara oksidativnog stresa, antioksidativnog odbrambenog markera, kao i histopatološkom analizom tkiva jetre. Dobijeni rezultati ukazuju da oralni pretretman pacova sa volframatima, pre svega ST, u kombinaciji sa DMSO, može biti koristan u prevenciji nekroze jetre indukovane tioacetamidom.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Beneficial effects of dimethyl sulfoxide on tungstates hepatoprotecitve activity, Pozitivan učinak dimetilsulfoksida na hepatoprotektivnu aktivnost volframata",
volume = "59",
number = "4",
pages = "265-278",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1312"
}

Uskoković-Marković, S., Milenković, M., Topić, A., Kotur-Stevuljević, J., Stefanović, A., Antić-Stanković, J.,& Holclajtner-Antunović, I.. (2009). Beneficial effects of dimethyl sulfoxide on tungstates hepatoprotecitve activity. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 59(4), 265-278.
https://hdl.handle.net/21.15107/rcub_farfar_1312

Uskoković-Marković S, Milenković M, Topić A, Kotur-Stevuljević J, Stefanović A, Antić-Stanković J, Holclajtner-Antunović I. Beneficial effects of dimethyl sulfoxide on tungstates hepatoprotecitve activity. in Arhiv za farmaciju. 2009;59(4):265-278.
https://hdl.handle.net/21.15107/rcub_farfar_1312 .

Uskoković-Marković, Snežana, Milenković, Marina, Topić, Aleksandra, Kotur-Stevuljević, Jelena, Stefanović, Aleksandra, Antić-Stanković, Jelena, Holclajtner-Antunović, Ivanka, "Beneficial effects of dimethyl sulfoxide on tungstates hepatoprotecitve activity" in Arhiv za farmaciju, 59, no. 4 (2009):265-278,
https://hdl.handle.net/21.15107/rcub_farfar_1312 .

TY  - CONF
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
PY  - 2009
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1159
PB  - Amer Chemical Soc, Washington
C3  - Abstracts of Papers of the American Chemical Society
T1  - Vibration spectroscopy of polyoxometalates and intermediates, applied as agents against plant viruses
VL  - 238
SP  - 499
EP  - 499
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1159
ER  - 

@conference{
author = "Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica",
year = "2009",
publisher = "Amer Chemical Soc, Washington",
journal = "Abstracts of Papers of the American Chemical Society",
title = "Vibration spectroscopy of polyoxometalates and intermediates, applied as agents against plant viruses",
volume = "238",
pages = "499-499",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1159"
}

Uskoković-Marković, S., Holclajtner-Antunović, I.,& Bajuk-Bogdanović, D.. (2009). Vibration spectroscopy of polyoxometalates and intermediates, applied as agents against plant viruses. in Abstracts of Papers of the American Chemical Society
Amer Chemical Soc, Washington., 238, 499-499.
https://hdl.handle.net/21.15107/rcub_farfar_1159

Uskoković-Marković S, Holclajtner-Antunović I, Bajuk-Bogdanović D. Vibration spectroscopy of polyoxometalates and intermediates, applied as agents against plant viruses. in Abstracts of Papers of the American Chemical Society. 2009;238:499-499.
https://hdl.handle.net/21.15107/rcub_farfar_1159 .

Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, "Vibration spectroscopy of polyoxometalates and intermediates, applied as agents against plant viruses" in Abstracts of Papers of the American Chemical Society, 238 (2009):499-499,
https://hdl.handle.net/21.15107/rcub_farfar_1159 .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Todorović, Marija R.
AU  - Mioč, Ubavka B.
AU  - Zakrzewska, Joanna
AU  - Uskoković-Marković, Snežana
PY  - 2008
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1031
AB  - The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0. the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5-7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.
PB  - Canadian Science Publishing, Nrc Research Press, Ottawa
T2  - Canadian Journal of Chemistry
T1  - Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution
VL  - 86
IS  - 10
SP  - 996
EP  - 1004
DO  - 10.1139/V08-138
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Todorović, Marija R. and Mioč, Ubavka B. and Zakrzewska, Joanna and Uskoković-Marković, Snežana",
year = "2008",
abstract = "The various molecular species of 12-tungstophosporic acid (WPA) in aqueous solutions of different pH values (from 1 to 11.5) were investigated by UV, IR, and NMR spectroscopy. The dependence of the attained equilibrium composition in solution on time, concentration of WPA, and type of buffer used was studied. Obtained results indicate that the buffer type and pH value greatly determine the equilibrium composition in the solution. The Keggin structure of the WPA is sustained only up to pH 1.5. With further increase in pH, the decomposition of Keggin anion does not lead directly to the monovacant lacunary anion. Between 1.5 and 2.0. the structures with 2 phosphorus atoms from the Dawson series are dominant as intermediate species. In the pH range 3.5-7.5, WPA is present in the form of the monovacant lacunary Keggin anion. These results are of special importance for the biomedical and catalytic applications of heteropoly compounds (HPCs) and for an improved understanding of the mechanism of their functioning.",
publisher = "Canadian Science Publishing, Nrc Research Press, Ottawa",
journal = "Canadian Journal of Chemistry",
title = "Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution",
volume = "86",
number = "10",
pages = "996-1004",
doi = "10.1139/V08-138"
}

Holclajtner-Antunović, I., Bajuk-Bogdanović, D., Todorović, M. R., Mioč, U. B., Zakrzewska, J.,& Uskoković-Marković, S.. (2008). Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. in Canadian Journal of Chemistry
Canadian Science Publishing, Nrc Research Press, Ottawa., 86(10), 996-1004.
https://doi.org/10.1139/V08-138

Holclajtner-Antunović I, Bajuk-Bogdanović D, Todorović MR, Mioč UB, Zakrzewska J, Uskoković-Marković S. Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution. in Canadian Journal of Chemistry. 2008;86(10):996-1004.
doi:10.1139/V08-138 .

Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Todorović, Marija R., Mioč, Ubavka B., Zakrzewska, Joanna, Uskoković-Marković, Snežana, "Sectroscopic study of stability and molecular species of 12-tungstophosphoric acid in aqueous solution" in Canadian Journal of Chemistry, 86, no. 10 (2008):996-1004,
https://doi.org/10.1139/V08-138 . .

TY  - CONF
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
AU  - Bajuk-Bogdanović, Danica
AU  - Zakrzewska, Joanna
PY  - 2008
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/1028
PB  - Amer Chemical Soc, Washington
C3  - Abstracts of Papers of the American Chemical Society
T1  - AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses
VL  - 236
UR  - https://hdl.handle.net/21.15107/rcub_farfar_1028
ER  - 

@conference{
author = "Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka and Bajuk-Bogdanović, Danica and Zakrzewska, Joanna",
year = "2008",
publisher = "Amer Chemical Soc, Washington",
journal = "Abstracts of Papers of the American Chemical Society",
title = "AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses",
volume = "236",
url = "https://hdl.handle.net/21.15107/rcub_farfar_1028"
}

Uskoković-Marković, S., Holclajtner-Antunović, I., Bajuk-Bogdanović, D.,& Zakrzewska, J.. (2008). AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses. in Abstracts of Papers of the American Chemical Society
Amer Chemical Soc, Washington., 236.
https://hdl.handle.net/21.15107/rcub_farfar_1028

Uskoković-Marković S, Holclajtner-Antunović I, Bajuk-Bogdanović D, Zakrzewska J. AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses. in Abstracts of Papers of the American Chemical Society. 2008;236.
https://hdl.handle.net/21.15107/rcub_farfar_1028 .

Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, Bajuk-Bogdanović, Danica, Zakrzewska, Joanna, "AGRO 99-Tungstophosphoric acid and its compounds as agents against plant viruses" in Abstracts of Papers of the American Chemical Society, 236 (2008),
https://hdl.handle.net/21.15107/rcub_farfar_1028 .

TY  - JOUR
AU  - Jelikić-Stankov, Milena
AU  - Uskoković-Marković, Snežana
AU  - Holclajtner-Antunović, Ivanka
AU  - Todorović, Marija R.
AU  - Đurđević, Predrag
PY  - 2007
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/912
AB  - Molybdenum, vanadium and tungsten compounds are widely applied as analytical reagents for determination of numerous pharmacologically active substances and different biochemical parameters. Recent data from the available literature pointed to a very potent biomedical activity of compounds containing these trace elements. The present paper represents a survey on the structure and chemical properties of these compounds, as well as on their biological activity, mostly based on their interaction with cations of biomolecules, such as phospholipids and proteins. Besides, their potent inhibitory effects on cellular targets, bacterial and viral DNA and RNA polymerases will be discussed, as well. Numerous authors clearly demonstrated the antiviral (especially anti-HIV), anticoagulant and antineoplastic properties of the compounds containing the above trace elements. It has been also shown that these compounds act on some cellular enzymatic systems leading to the normalisation of blood pressure, blood glucose and serum lipid levels. Also, compounds of these trace elements represent potent antiobesity agents and express hepatoprotective and antioxidative stress activity.
PB  - Elsevier Gmbh, Urban & Fischer Verlag, Jena
T2  - Journal of Trace Elements in Medicine and Biology
T1  - Compounds of Mo, V and W in biochemistry and their biomedical activity
VL  - 21
IS  - 1
SP  - 8
EP  - 16
DO  - 10.1016/j.jtemb.2006.11.004
ER  - 

@article{
author = "Jelikić-Stankov, Milena and Uskoković-Marković, Snežana and Holclajtner-Antunović, Ivanka and Todorović, Marija R. and Đurđević, Predrag",
year = "2007",
abstract = "Molybdenum, vanadium and tungsten compounds are widely applied as analytical reagents for determination of numerous pharmacologically active substances and different biochemical parameters. Recent data from the available literature pointed to a very potent biomedical activity of compounds containing these trace elements. The present paper represents a survey on the structure and chemical properties of these compounds, as well as on their biological activity, mostly based on their interaction with cations of biomolecules, such as phospholipids and proteins. Besides, their potent inhibitory effects on cellular targets, bacterial and viral DNA and RNA polymerases will be discussed, as well. Numerous authors clearly demonstrated the antiviral (especially anti-HIV), anticoagulant and antineoplastic properties of the compounds containing the above trace elements. It has been also shown that these compounds act on some cellular enzymatic systems leading to the normalisation of blood pressure, blood glucose and serum lipid levels. Also, compounds of these trace elements represent potent antiobesity agents and express hepatoprotective and antioxidative stress activity.",
publisher = "Elsevier Gmbh, Urban & Fischer Verlag, Jena",
journal = "Journal of Trace Elements in Medicine and Biology",
title = "Compounds of Mo, V and W in biochemistry and their biomedical activity",
volume = "21",
number = "1",
pages = "8-16",
doi = "10.1016/j.jtemb.2006.11.004"
}

Jelikić-Stankov, M., Uskoković-Marković, S., Holclajtner-Antunović, I., Todorović, M. R.,& Đurđević, P.. (2007). Compounds of Mo, V and W in biochemistry and their biomedical activity. in Journal of Trace Elements in Medicine and Biology
Elsevier Gmbh, Urban & Fischer Verlag, Jena., 21(1), 8-16.
https://doi.org/10.1016/j.jtemb.2006.11.004

Jelikić-Stankov M, Uskoković-Marković S, Holclajtner-Antunović I, Todorović MR, Đurđević P. Compounds of Mo, V and W in biochemistry and their biomedical activity. in Journal of Trace Elements in Medicine and Biology. 2007;21(1):8-16.
doi:10.1016/j.jtemb.2006.11.004 .

Jelikić-Stankov, Milena, Uskoković-Marković, Snežana, Holclajtner-Antunović, Ivanka, Todorović, Marija R., Đurđević, Predrag, "Compounds of Mo, V and W in biochemistry and their biomedical activity" in Journal of Trace Elements in Medicine and Biology, 21, no. 1 (2007):8-16,
https://doi.org/10.1016/j.jtemb.2006.11.004 . .

TY  - JOUR
AU  - Kuntić, Vesna
AU  - Stanojević, Maja
AU  - Holclajtner-Antunović, Ivanka
AU  - Uskoković-Marković, Snežana
AU  - Mioč, Ubavka B.
AU  - Todorović, Marija R.
AU  - Jovanović, Tanja
AU  - Vukojević, Vladana
PY  - 2006
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/837
AB  - Compounds of phosphotungstic acid (WPA) containing the amino acids alanine (WPA-Ala) or glycine (WPA-Gly) as counter cations were synthesized and characterized by elemental analysis, thermal analysis, and IR spectroscopy. Cellular toxicity was assessed by the trypan blue exclusion method, and the antiviral activity of WPA and the modified WPA compounds was tested against herpes simplex viruses (HSV) type 1 and type 2. Biological assays indicate that the newly synthesized compounds exhibit no evident cytotoxic effects on Vero cells and negligible antiviral activity against HSV-1 and HSV-2.
PB  - Springer Wien, Wien
T2  - Monatshefte für Chemie Chemical Monthly
T1  - Synthesis, characterization, and biological activity of amino acid derivatives of the heteropolytungstophosphoric acid
VL  - 137
IS  - 6
SP  - 803
EP  - 810
DO  - 10.1007/s00706-006-0467-3
ER  - 

@article{
author = "Kuntić, Vesna and Stanojević, Maja and Holclajtner-Antunović, Ivanka and Uskoković-Marković, Snežana and Mioč, Ubavka B. and Todorović, Marija R. and Jovanović, Tanja and Vukojević, Vladana",
year = "2006",
abstract = "Compounds of phosphotungstic acid (WPA) containing the amino acids alanine (WPA-Ala) or glycine (WPA-Gly) as counter cations were synthesized and characterized by elemental analysis, thermal analysis, and IR spectroscopy. Cellular toxicity was assessed by the trypan blue exclusion method, and the antiviral activity of WPA and the modified WPA compounds was tested against herpes simplex viruses (HSV) type 1 and type 2. Biological assays indicate that the newly synthesized compounds exhibit no evident cytotoxic effects on Vero cells and negligible antiviral activity against HSV-1 and HSV-2.",
publisher = "Springer Wien, Wien",
journal = "Monatshefte für Chemie Chemical Monthly",
title = "Synthesis, characterization, and biological activity of amino acid derivatives of the heteropolytungstophosphoric acid",
volume = "137",
number = "6",
pages = "803-810",
doi = "10.1007/s00706-006-0467-3"
}

Kuntić, V., Stanojević, M., Holclajtner-Antunović, I., Uskoković-Marković, S., Mioč, U. B., Todorović, M. R., Jovanović, T.,& Vukojević, V.. (2006). Synthesis, characterization, and biological activity of amino acid derivatives of the heteropolytungstophosphoric acid. in Monatshefte für Chemie Chemical Monthly
Springer Wien, Wien., 137(6), 803-810.
https://doi.org/10.1007/s00706-006-0467-3

Kuntić V, Stanojević M, Holclajtner-Antunović I, Uskoković-Marković S, Mioč UB, Todorović MR, Jovanović T, Vukojević V. Synthesis, characterization, and biological activity of amino acid derivatives of the heteropolytungstophosphoric acid. in Monatshefte für Chemie Chemical Monthly. 2006;137(6):803-810.
doi:10.1007/s00706-006-0467-3 .

Kuntić, Vesna, Stanojević, Maja, Holclajtner-Antunović, Ivanka, Uskoković-Marković, Snežana, Mioč, Ubavka B., Todorović, Marija R., Jovanović, Tanja, Vukojević, Vladana, "Synthesis, characterization, and biological activity of amino acid derivatives of the heteropolytungstophosphoric acid" in Monatshefte für Chemie Chemical Monthly, 137, no. 6 (2006):803-810,
https://doi.org/10.1007/s00706-006-0467-3 . .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Todorović, Marija R.
AU  - Milićević, Verica A.
AU  - Ražić, Slavica
AU  - Rašković, Marija R.
PY  - 2005
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/579
AB  - In this paper the content of trace elements (Cu, Mn, Fe and Zn) were determined in biscuits with addition of different kinds of dry fruits. For all determinations the pretreatment procedures were optimized. The elements were determined by flame atomic absorption spectrophotometry and atomic emission spectrometry with inductively coupled plasma and argon stabilized U-shaped d.c. arc as excitation sources. It is shown that matrix effect originating from alkaline and alkaline earth elements is different in different excitation sources and depends on analyte type. Therefore matrix matching is indispensable.
AB  - U ovom radu određen je sadržaj tragova elemenata (Cu, Mn, Fe i Zn) u keksima sa dodatkom različitih vrsta sušenog voća. Za sva određivanja optimizovane su procedure pripreme. Elementi su određivani plamenom atomskom apsorpcionom spektrometrijom i atomskom emisionom spektrometrijom, sa induktivno spregnutom plazmom i argonom stabilizovanim U-lukom jednosmerne struje, kao ekscitacionim izvorima. Pokazalo se da je matriks efekat, koji potiče od alkalnih i zemnoalkalnih elemenata, različit sa različitim ekscitacionim izvorima i da zavisi od tipa analita. Stoga je neophodno "poklapanje" matriksa pri tačnom određivanju tragova elemenata.
PB  - Savez farmaceutskih udruženja Srbije, Beograd
T2  - Arhiv za farmaciju
T1  - Investigation of matrix effect in spectrochemical determination of trace elements in biscuits
T1  - Ispitivanje matriks efekta pri spektrohemijskom određivanju tragova elemenata u keksu
VL  - 55
IS  - 3
SP  - 255
EP  - 265
UR  - https://hdl.handle.net/21.15107/rcub_farfar_579
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Todorović, Marija R. and Milićević, Verica A. and Ražić, Slavica and Rašković, Marija R.",
year = "2005",
abstract = "In this paper the content of trace elements (Cu, Mn, Fe and Zn) were determined in biscuits with addition of different kinds of dry fruits. For all determinations the pretreatment procedures were optimized. The elements were determined by flame atomic absorption spectrophotometry and atomic emission spectrometry with inductively coupled plasma and argon stabilized U-shaped d.c. arc as excitation sources. It is shown that matrix effect originating from alkaline and alkaline earth elements is different in different excitation sources and depends on analyte type. Therefore matrix matching is indispensable., U ovom radu određen je sadržaj tragova elemenata (Cu, Mn, Fe i Zn) u keksima sa dodatkom različitih vrsta sušenog voća. Za sva određivanja optimizovane su procedure pripreme. Elementi su određivani plamenom atomskom apsorpcionom spektrometrijom i atomskom emisionom spektrometrijom, sa induktivno spregnutom plazmom i argonom stabilizovanim U-lukom jednosmerne struje, kao ekscitacionim izvorima. Pokazalo se da je matriks efekat, koji potiče od alkalnih i zemnoalkalnih elemenata, različit sa različitim ekscitacionim izvorima i da zavisi od tipa analita. Stoga je neophodno "poklapanje" matriksa pri tačnom određivanju tragova elemenata.",
publisher = "Savez farmaceutskih udruženja Srbije, Beograd",
journal = "Arhiv za farmaciju",
title = "Investigation of matrix effect in spectrochemical determination of trace elements in biscuits, Ispitivanje matriks efekta pri spektrohemijskom određivanju tragova elemenata u keksu",
volume = "55",
number = "3",
pages = "255-265",
url = "https://hdl.handle.net/21.15107/rcub_farfar_579"
}

Holclajtner-Antunović, I., Todorović, M. R., Milićević, V. A., Ražić, S.,& Rašković, M. R.. (2005). Investigation of matrix effect in spectrochemical determination of trace elements in biscuits. in Arhiv za farmaciju
Savez farmaceutskih udruženja Srbije, Beograd., 55(3), 255-265.
https://hdl.handle.net/21.15107/rcub_farfar_579

Holclajtner-Antunović I, Todorović MR, Milićević VA, Ražić S, Rašković MR. Investigation of matrix effect in spectrochemical determination of trace elements in biscuits. in Arhiv za farmaciju. 2005;55(3):255-265.
https://hdl.handle.net/21.15107/rcub_farfar_579 .

Holclajtner-Antunović, Ivanka, Todorović, Marija R., Milićević, Verica A., Ražić, Slavica, Rašković, Marija R., "Investigation of matrix effect in spectrochemical determination of trace elements in biscuits" in Arhiv za farmaciju, 55, no. 3 (2005):255-265,
https://hdl.handle.net/21.15107/rcub_farfar_579 .

TY  - JOUR
AU  - Holclajtner-Antunović, Ivanka
AU  - Kuntić, Vesna
AU  - Juranić, Zorica
AU  - Filipović, Ivana M.
AU  - Mioč, Ubavka B.
AU  - Stanojković, Tatjana
AU  - Žižak, Željko
PY  - 2004
UR  - https://farfar.pharmacy.bg.ac.rs/handle/123456789/556
AB  - The antitumour action of three polyoxometallate compounds of Keggin's type: 12-molibdophosphoric acid (MoPA), 12-tungstophosphoric acid (WPA) and Mg salt of WPA (MgHWPA) was studied in vitro. For human cervix carcinoma (HeLa) cells survival, as well as for nonstimulated and stimulated peripheral blood mononuclear cells (PBMC), MTT test was applied and IC50 values of POMs were determinated. Index selectivity for WPA and MgHWPA are 1.9 and 1.8, calculated for nonstimulated, as well as 2.5 and 2.0, calculated for stimulated PBMS. Combination of studied POMs do not contribute to their lower IC50 values. Apoptosis detection implies mild cytotoxic effect of WPA and more cytostatical effect of MgHWPA. Combination of each of the studied POMs with caffeine decreases HeLa survival in dose dependent way. None of the studied POMs in the used concentrations (up to 100 mmol/L) damages blood cells and/or decreases their number.
AB  - Ispitivano je in vitro antitumorsko dejstvo tri jedinjenja iz grupe polioksometalata (POM-a) Keginovog tipa: 12-fosformolibdenska kiselina (MoPA), 12-fosforvolframova kiselina (WPA) i Mg so 12-fosforvolframove kiseline (MgHWPA). Primenom MTT testa na ćelije karcinoma cerviksa (HeLa ćelije), kao i na nestimulisane i stimulisane mononuklearne ćelije iz periferne krvi (PBMC), određene su IC50 vrednosti ispitivanih POM-a. Indeksi selektivnosti za WPA i MgHWPA su 1,9 i 1,8 računati za nestimulisane, odnosno 2,5 i 2,0 za stimulisane PBMC. Kombinacijom ispitivanih POMa ne postiže se smanjenje njihovih IC50 vrednosti. Detekcijom apoptoze utvrđeno je da WPA pokazuje blagi citotoksični efekat, dok MgHWPA ima blagi citotostatski efekat. U kombinaciji sa kofeinom, POM jedinjenja još više smanjuju preživljavanje HeLa ćelija. U ispitivanim koncentracijama (do 100 mmol/L), nijedno od POM jedinjenja ne utiče na broj i izgled krvnih ćelija pune krvi zdravih davalaca.
PB  - Društvo medicinskih biohemičara Srbije i Crne Gore, Beograd i Univerzitet u Beogradu - Farmaceutski fakultet, Beograd
T2  - Jugoslovenska medicinska biohemija
T1  - Study of some polyoxometallates of Keggin's type as potential antitumour agents
T1  - Ispitivanje nekih polioksalometalata Keginovog tipa kao potencijalnih antitumorskih agenasa
VL  - 23
IS  - 1
SP  - 25
EP  - 30
DO  - 10.2298/JMH0401025H
ER  - 

@article{
author = "Holclajtner-Antunović, Ivanka and Kuntić, Vesna and Juranić, Zorica and Filipović, Ivana M. and Mioč, Ubavka B. and Stanojković, Tatjana and Žižak, Željko",
year = "2004",
abstract = "The antitumour action of three polyoxometallate compounds of Keggin's type: 12-molibdophosphoric acid (MoPA), 12-tungstophosphoric acid (WPA) and Mg salt of WPA (MgHWPA) was studied in vitro. For human cervix carcinoma (HeLa) cells survival, as well as for nonstimulated and stimulated peripheral blood mononuclear cells (PBMC), MTT test was applied and IC50 values of POMs were determinated. Index selectivity for WPA and MgHWPA are 1.9 and 1.8, calculated for nonstimulated, as well as 2.5 and 2.0, calculated for stimulated PBMS. Combination of studied POMs do not contribute to their lower IC50 values. Apoptosis detection implies mild cytotoxic effect of WPA and more cytostatical effect of MgHWPA. Combination of each of the studied POMs with caffeine decreases HeLa survival in dose dependent way. None of the studied POMs in the used concentrations (up to 100 mmol/L) damages blood cells and/or decreases their number., Ispitivano je in vitro antitumorsko dejstvo tri jedinjenja iz grupe polioksometalata (POM-a) Keginovog tipa: 12-fosformolibdenska kiselina (MoPA), 12-fosforvolframova kiselina (WPA) i Mg so 12-fosforvolframove kiseline (MgHWPA). Primenom MTT testa na ćelije karcinoma cerviksa (HeLa ćelije), kao i na nestimulisane i stimulisane mononuklearne ćelije iz periferne krvi (PBMC), određene su IC50 vrednosti ispitivanih POM-a. Indeksi selektivnosti za WPA i MgHWPA su 1,9 i 1,8 računati za nestimulisane, odnosno 2,5 i 2,0 za stimulisane PBMC. Kombinacijom ispitivanih POMa ne postiže se smanjenje njihovih IC50 vrednosti. Detekcijom apoptoze utvrđeno je da WPA pokazuje blagi citotoksični efekat, dok MgHWPA ima blagi citotostatski efekat. U kombinaciji sa kofeinom, POM jedinjenja još više smanjuju preživljavanje HeLa ćelija. U ispitivanim koncentracijama (do 100 mmol/L), nijedno od POM jedinjenja ne utiče na broj i izgled krvnih ćelija pune krvi zdravih davalaca.",
publisher = "Društvo medicinskih biohemičara Srbije i Crne Gore, Beograd i Univerzitet u Beogradu - Farmaceutski fakultet, Beograd",
journal = "Jugoslovenska medicinska biohemija",
title = "Study of some polyoxometallates of Keggin's type as potential antitumour agents, Ispitivanje nekih polioksalometalata Keginovog tipa kao potencijalnih antitumorskih agenasa",
volume = "23",
number = "1",
pages = "25-30",
doi = "10.2298/JMH0401025H"
}

Holclajtner-Antunović, I., Kuntić, V., Juranić, Z., Filipović, I. M., Mioč, U. B., Stanojković, T.,& Žižak, Ž.. (2004). Study of some polyoxometallates of Keggin's type as potential antitumour agents. in Jugoslovenska medicinska biohemija
Društvo medicinskih biohemičara Srbije i Crne Gore, Beograd i Univerzitet u Beogradu - Farmaceutski fakultet, Beograd., 23(1), 25-30.
https://doi.org/10.2298/JMH0401025H

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