Ћир 
Eng 
FFH scientific papers database
416.
Stamenović, U; Gavrilov, N; Pašti, I A; Otoničar, M; Ćirić-Marjanović, G; Škapin, S D; Mitrić, M; Vodnik, V
One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction Journal Article
In: Electrochimica Acta, vol. 281, pp. 549-561, 2018.
@article{Stamenović2018549c,
title = {One-pot synthesis of novel silver-polyaniline-polyvinylpyrrolidone electrocatalysts for efficient oxygen reduction reaction},
author = {U Stamenović and N Gavrilov and I A Pašti and M Otoničar and G Ćirić-Marjanović and S D Škapin and M Mitrić and V Vodnik},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048162862&doi=10.1016%2fj.electacta.2018.05.202&partnerID=40&md5=e165de6905343ca4028597fe617cbca3},
doi = {10.1016/j.electacta.2018.05.202},
year = {2018},
date = {2018-01-01},
journal = {Electrochimica Acta},
volume = {281},
pages = {549-561},
abstract = {A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts. © 2018 Elsevier Ltd},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A facile and fast aqueous phase-based strategy to synthesize silver-polyaniline-polyvinylpyrrolidone (Ag-PANI-PVP) nanocomposites, via chemical oxidative polymerization method is presented. In the presence of polyvinylpyrrolidone (PVP), which has an accelerating effect on the oxidation of aniline with silver nitrate, Ag nanoparticles (AgNPs) were in situ generated in aqueous solution during simultaneous formation of polyaniline (PANI), without any additional reducing agent or complicated treatment. We have demonstrated synthesis of three stabile Ag-PANI-PVP nanocomposites with different content, size, and morphology of Ag nanoparticles by varying the experimental parameters, such as pH and PVP concentration. As a result, this led to different Ag nanostructures (spherical and polyhedral NPs), and, consequently, different morphology of formed nanocomposites (granular and nanosheets). The physicochemical properties of nanocomposites were examined by using different analytical techniques (UV–Vis, TEM, FESEM, FT-IR, XRD, and Raman). It is found that optical properties, electrical conductivity and the content of Ag in the composites vary depending on the synthetic conditions. The electrocatalytic behavior of Ag-PANI-PVP nanocomposites was examined towards the oxygen reduction reaction in acidic and alkaline media. All tested nanocomposites showed high electrocatalytic activity, while the most active catalyst is the one with the highest electrical conductivity (≈0.6 S cm−1) and the lowest Ag content (3.4 wt%), synthesized in the solution without added acid. The simplicity of synthesis and good electrocatalytic efficiency of prepared nanocomposites combined with large-scale availability make them attractive as Pt-free electrocatalysts. © 2018 Elsevier Ltd
417.
Zhang, Y; Serrano-Luginbühl, S; Kissner, R; Milojević-Rakić, M; Bajuk-Bogdanović, D; Ćirić-Marjanović, G; Wang, Q; Walde, P
Enzymatic Synthesis of Highly Electroactive Oligoanilines from a p-Aminodiphenylamine/Aniline Mixture with Anionic Vesicles as Templates Journal Article
In: Langmuir, vol. 34, no. 31, pp. 9153-9166, 2018.
@article{Zhang20189153c,
title = {Enzymatic Synthesis of Highly Electroactive Oligoanilines from a p-Aminodiphenylamine/Aniline Mixture with Anionic Vesicles as Templates},
author = {Y Zhang and S Serrano-Luginbühl and R Kissner and M Milojević-Rakić and D Bajuk-Bogdanović and G Ćirić-Marjanović and Q Wang and P Walde},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85049856314&doi=10.1021%2facs.langmuir.8b00953&partnerID=40&md5=9d0e5964598bd9a5797cbf83c9c29f81},
doi = {10.1021/acs.langmuir.8b00953},
year = {2018},
date = {2018-01-01},
journal = {Langmuir},
volume = {34},
number = {31},
pages = {9153-9166},
abstract = {Oligoanilines with characteristic properties of the electrically conductive emeraldine salt form of polyaniline (PANI-ES) are promising molecules for various applications. A mixture of such oligoanilines can be obtained, for example, enzymatically under mild conditions from the linear aniline dimer p-aminodiphenylamine (PADPA) with hydrogen peroxide (H 2 O 2 ) and low amounts of horseradish peroxidase (HRP) in an aqueous pH = 4.3 suspension of anionic vesicles formed from AOT, the sodium salt of bis(2-ethylhexyl)sulfosuccinate. However, the simultaneous formation of undesired side products containing phenazine-type units or oxygen atoms is unsatisfactory. We have found that this situation can be improved considerably by using a mixture of PADPA and aniline instead of PADPA only but otherwise nearly identical conditions. The PANI-ES-like oligoaniline products that are obtained from the PADPA and aniline mixture were not only found to have much lower contents of phenazine-type units and not contain oxygen atoms but also were shown to be more electroactive in cyclic voltammetry measurements than the PANI-ES-like products obtained from PADPA only. The AOT vesicle suspension remained stable without product precipitation during and after the entire reaction so that it could be analyzed by in situ UV/visible/near-infrared, in situ electron paramagnetic resonance, and in situ Raman spectroscopy measurements. These measurements were complemented with ex situ high-performance liquid chromatography analyses of the deprotonated and reduced products formed from mixtures of PADPA and either fully or partially deuterated aniline. On the basis of the results obtained, a reaction mechanism is proposed for explaining this improved HRP-triggered, vesicle-assisted synthesis of electroactive PANI-ES-like products. The oligomeric products obtained can be further used, without additional special workup, for example, to coat electrodes for their possible application in biosensor devices. © 2018 American Chemical Society.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Oligoanilines with characteristic properties of the electrically conductive emeraldine salt form of polyaniline (PANI-ES) are promising molecules for various applications. A mixture of such oligoanilines can be obtained, for example, enzymatically under mild conditions from the linear aniline dimer p-aminodiphenylamine (PADPA) with hydrogen peroxide (H 2 O 2 ) and low amounts of horseradish peroxidase (HRP) in an aqueous pH = 4.3 suspension of anionic vesicles formed from AOT, the sodium salt of bis(2-ethylhexyl)sulfosuccinate. However, the simultaneous formation of undesired side products containing phenazine-type units or oxygen atoms is unsatisfactory. We have found that this situation can be improved considerably by using a mixture of PADPA and aniline instead of PADPA only but otherwise nearly identical conditions. The PANI-ES-like oligoaniline products that are obtained from the PADPA and aniline mixture were not only found to have much lower contents of phenazine-type units and not contain oxygen atoms but also were shown to be more electroactive in cyclic voltammetry measurements than the PANI-ES-like products obtained from PADPA only. The AOT vesicle suspension remained stable without product precipitation during and after the entire reaction so that it could be analyzed by in situ UV/visible/near-infrared, in situ electron paramagnetic resonance, and in situ Raman spectroscopy measurements. These measurements were complemented with ex situ high-performance liquid chromatography analyses of the deprotonated and reduced products formed from mixtures of PADPA and either fully or partially deuterated aniline. On the basis of the results obtained, a reaction mechanism is proposed for explaining this improved HRP-triggered, vesicle-assisted synthesis of electroactive PANI-ES-like products. The oligomeric products obtained can be further used, without additional special workup, for example, to coat electrodes for their possible application in biosensor devices. © 2018 American Chemical Society.
418.
Čupić, Ž; Maćešić, S; Novakovic, K; Anić, S; Kolar-Anić, L
Stoichiometric network analysis of a reaction system with conservation constraints Journal Article
In: Chaos, vol. 28, no. 8, 2018.
@article{Čupić2018c,
title = {Stoichiometric network analysis of a reaction system with conservation constraints},
author = {Ž Čupić and S Maćešić and K Novakovic and S Anić and L Kolar-Anić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85052325290&doi=10.1063%2f1.5026791&partnerID=40&md5=eaf40812c5c17ae0c0e1d9ac9ee95290},
doi = {10.1063/1.5026791},
year = {2018},
date = {2018-01-01},
journal = {Chaos},
volume = {28},
number = {8},
abstract = {Stoichiometric Network Analysis (SNA) is a powerful method that can be used to examine instabilities in modelling a broad range of reaction systems without knowing the explicit values of reaction rate constants. Due to a lack of understanding, SNA is rarely used and its full potential is not yet fulfilled. Using the oscillatory carbonylation of a polymeric substrate [poly(ethylene glycol)methyl ether acetylene] as a case study, in this work, we consider two mathematical methods for the application of SNA to the reaction models when conservation constraints between species have an important role. The first method takes conservation constraints into account and uses only independent intermediate species, while the second method applies to the full set of intermediate species, without the separation of independent and dependent variables. Both methods are used for examination of steady state stability by means of a characteristic polynomial and related Jacobian matrix. It was shown that both methods give the same results. Therefore, as the second method is simpler, we suggest it as a more straightforward method for the applications. © 2018 Author(s).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stoichiometric Network Analysis (SNA) is a powerful method that can be used to examine instabilities in modelling a broad range of reaction systems without knowing the explicit values of reaction rate constants. Due to a lack of understanding, SNA is rarely used and its full potential is not yet fulfilled. Using the oscillatory carbonylation of a polymeric substrate [poly(ethylene glycol)methyl ether acetylene] as a case study, in this work, we consider two mathematical methods for the application of SNA to the reaction models when conservation constraints between species have an important role. The first method takes conservation constraints into account and uses only independent intermediate species, while the second method applies to the full set of intermediate species, without the separation of independent and dependent variables. Both methods are used for examination of steady state stability by means of a characteristic polynomial and related Jacobian matrix. It was shown that both methods give the same results. Therefore, as the second method is simpler, we suggest it as a more straightforward method for the applications. © 2018 Author(s).
419.
Mohaček-Grošev, V; Gebavi, H; Bonifacio, A; Sergo, V; Daković, M; Bajuk-Bogdanović, D
Binding of p-mercaptobenzoic acid and adenine to gold-coated electroless etched silicon nanowires studied by surface-enhanced Raman scattering Journal Article
In: Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, vol. 200, pp. 102-109, 2018.
@article{Mohaček-Grošev2018102c,
title = {Binding of p-mercaptobenzoic acid and adenine to gold-coated electroless etched silicon nanowires studied by surface-enhanced Raman scattering},
author = {V Mohaček-Grošev and H Gebavi and A Bonifacio and V Sergo and M Daković and D Bajuk-Bogdanović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85045449019&doi=10.1016%2fj.saa.2018.04.016&partnerID=40&md5=bec220a63b8d25c810cfb1c4ef728c6d},
doi = {10.1016/j.saa.2018.04.016},
year = {2018},
date = {2018-01-01},
journal = {Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy},
volume = {200},
pages = {102-109},
abstract = {Modern diagnostic tools ever aim to reduce the amount of analyte and the time needed for obtaining the result. Surface-enhanced Raman spectroscopy is a method that could satisfy both of these requirements, provided that for each analyte an adequate substrate is found. Here we demonstrate the ability of gold-sputtered silicon nanowires (SiNW) to bind p-mercaptobenzoic acid in 10−3, 10−4 and 10−5 M and adenine in 30 and 100 μM concentrations. Based on the normal mode analysis, presented here for the first time, the binding of p-mercaptobenzoic acid is deduced. The intensity enhancement of the 1106 cm−1 band is explained by involvement of the C–S stretching deformation, and the appearance of the broad 300 cm−1 band attributed to S–Au stretching mode. Adenine SERS spectra demonstrate the existence of the 7H tautomer since the strongest band observed is at 736 cm−1. The adenine binding is likely to occur in several ways, because the number of observed bands in the 1200–1600 cm−1 interval exceeds the number of observed bands in the normal Raman spectrum of the free molecule. © 2018 Elsevier B.V.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Modern diagnostic tools ever aim to reduce the amount of analyte and the time needed for obtaining the result. Surface-enhanced Raman spectroscopy is a method that could satisfy both of these requirements, provided that for each analyte an adequate substrate is found. Here we demonstrate the ability of gold-sputtered silicon nanowires (SiNW) to bind p-mercaptobenzoic acid in 10−3, 10−4 and 10−5 M and adenine in 30 and 100 μM concentrations. Based on the normal mode analysis, presented here for the first time, the binding of p-mercaptobenzoic acid is deduced. The intensity enhancement of the 1106 cm−1 band is explained by involvement of the C–S stretching deformation, and the appearance of the broad 300 cm−1 band attributed to S–Au stretching mode. Adenine SERS spectra demonstrate the existence of the 7H tautomer since the strongest band observed is at 736 cm−1. The adenine binding is likely to occur in several ways, because the number of observed bands in the 1200–1600 cm−1 interval exceeds the number of observed bands in the normal Raman spectrum of the free molecule. © 2018 Elsevier B.V.
420.
Chanda, D; Dobrota, A S; Hnát, J; Sofer, Z; Pašti, I A; Skorodumova, N V; Paidar, M; Bouzek, K
Investigation of electrocatalytic activity on a N-doped reduced graphene oxide surface for the oxygen reduction reaction in an alkaline medium Journal Article
In: International Journal of Hydrogen Energy, vol. 43, no. 27, pp. 12129-12139, 2018.
@article{Chanda201812129c,
title = {Investigation of electrocatalytic activity on a N-doped reduced graphene oxide surface for the oxygen reduction reaction in an alkaline medium},
author = {D Chanda and A S Dobrota and J Hnát and Z Sofer and I A Pašti and N V Skorodumova and M Paidar and K Bouzek},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-85047721589&doi=10.1016%2fj.ijhydene.2018.05.012&partnerID=40&md5=14c33e03a177eb9628c9eb01269d7182},
doi = {10.1016/j.ijhydene.2018.05.012},
year = {2018},
date = {2018-01-01},
journal = {International Journal of Hydrogen Energy},
volume = {43},
number = {27},
pages = {12129-12139},
abstract = {Today the search for new energy resources is a crucial topic for materials science. The development of new effective catalysts for the oxygen reduction reaction can significantly improve the performance of fuel cells as well as electrocatalytic hydrogen production. This study presents the scalable synthesis of nitrogen-doped graphene oxide for the oxygen reduction reaction. The combination of an ab initio theoretical investigation of the oxygen reduction reaction (ORR) mechanism and detailed electrochemical characterization allowed the identification of electrocatalytically active nitrogen functionalities. The dominant effect on electrocatalytic activity is the presence of graphitic and pyridinic nitrogen and also N-oxide functionalities. The overpotential of ORR for nitrogen-doped graphene oxide prepared by microwave-assisted synthesis outperformed the metal-doped graphene materials. © 2018 Hydrogen Energy Publications LLC},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Today the search for new energy resources is a crucial topic for materials science. The development of new effective catalysts for the oxygen reduction reaction can significantly improve the performance of fuel cells as well as electrocatalytic hydrogen production. This study presents the scalable synthesis of nitrogen-doped graphene oxide for the oxygen reduction reaction. The combination of an ab initio theoretical investigation of the oxygen reduction reaction (ORR) mechanism and detailed electrochemical characterization allowed the identification of electrocatalytically active nitrogen functionalities. The dominant effect on electrocatalytic activity is the presence of graphitic and pyridinic nitrogen and also N-oxide functionalities. The overpotential of ORR for nitrogen-doped graphene oxide prepared by microwave-assisted synthesis outperformed the metal-doped graphene materials. © 2018 Hydrogen Energy Publications LLC
1996
Šušic, M V
Synthesis of new materials: Physicochemical aspects Journal Article
In: Materials Science Forum, vol. 214, pp. 81-90, 1996.
@article{Šušic199681,
title = {Synthesis of new materials: Physicochemical aspects},
author = {M V Šušic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029725414&partnerID=40&md5=f2ac2f06ee45d7484470498b97fe1ae9},
year = {1996},
date = {1996-01-01},
journal = {Materials Science Forum},
volume = {214},
pages = {81-90},
abstract = {Our recent investigations have been directed towards characterization of physicochemical and physical properties of different types of new materials: solid ionic superconductors in crystal and glassy state; multicomponent alloys in glassy (amorphous) state; multicomponent alloys in amorphous, crystal and powder states; some oxides and silicates, for very active absorption of hydrogen to store "hydrogen energy", i.e. hydrogen. Materials, deformed under pressure, in different states (compacted and powdered) and their recovery by heating have also been studied. A series of new methods have been developed for kinetic, thermodynamic, electrical, magnetic, and other analyses of the processes accompanying the registered changes in synthesized materials under investigation.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Our recent investigations have been directed towards characterization of physicochemical and physical properties of different types of new materials: solid ionic superconductors in crystal and glassy state; multicomponent alloys in glassy (amorphous) state; multicomponent alloys in amorphous, crystal and powder states; some oxides and silicates, for very active absorption of hydrogen to store "hydrogen energy", i.e. hydrogen. Materials, deformed under pressure, in different states (compacted and powdered) and their recovery by heating have also been studied. A series of new methods have been developed for kinetic, thermodynamic, electrical, magnetic, and other analyses of the processes accompanying the registered changes in synthesized materials under investigation.
Kuzmanović, M M; Pavlović, M S; Marinković, M
Emission spectrometric analysis of fresh waters with U-shaped d.c. arc with aerosol supply Journal Article
In: Spectroscopy Letters, vol. 29, no. 2, pp. 205-215, 1996.
@article{Kuzmanović1996205,
title = {Emission spectrometric analysis of fresh waters with U-shaped d.c. arc with aerosol supply},
author = {M M Kuzmanović and M S Pavlović and M Marinković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0013164198&doi=10.1080%2f00387019608001597&partnerID=40&md5=faa64fa60e2b7546b66c03d7559fba57},
doi = {10.1080/00387019608001597},
year = {1996},
date = {1996-01-01},
journal = {Spectroscopy Letters},
volume = {29},
number = {2},
pages = {205-215},
abstract = {The application of a U-shaped d.c, arc with aerosol supply for analysis of fresh waters has been described. Limits of detection obtained with d.c. plasma compare well with those reported for ICP A number of spectral lines and molecular bands were examined and the most suitable are selected to ensure the best limits of detection or wide dynamic ranges Limits of detection in ng ml-1, given in the parenthesis, following the element symbol, are: Al(0.9), B(0.6), Ba(0.2), Be(0.15), Ca(0.05), Cd(3.5), Co(1.1), Cr(0.2), Fe(2.4), Ga(0,5), Hg(9 0), K(0.3), Li(0.008), Mg(0.4)3 Mn(0.3), Mo(0.7), Na(0 04), Ni(2.0), P(45), Pb(12), Si(9.0), Sr(0.04), Zn(1.3).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The application of a U-shaped d.c, arc with aerosol supply for analysis of fresh waters has been described. Limits of detection obtained with d.c. plasma compare well with those reported for ICP A number of spectral lines and molecular bands were examined and the most suitable are selected to ensure the best limits of detection or wide dynamic ranges Limits of detection in ng ml-1, given in the parenthesis, following the element symbol, are: Al(0.9), B(0.6), Ba(0.2), Be(0.15), Ca(0.05), Cd(3.5), Co(1.1), Cr(0.2), Fe(2.4), Ga(0,5), Hg(9 0), K(0.3), Li(0.008), Mg(0.4)3 Mn(0.3), Mo(0.7), Na(0 04), Ni(2.0), P(45), Pb(12), Si(9.0), Sr(0.04), Zn(1.3).
Ražić, S; Todorović, M; Holclajtner-Antunović, I; Ilić, Z
The influence of ethanol addition on the determination of trace elements in aqueous solutions by ICAP Journal Article
In: Fresenius' Journal of Analytical Chemistry, vol. 355, no. 3-4, pp. 274-276, 1996.
@article{Ražić1996274,
title = {The influence of ethanol addition on the determination of trace elements in aqueous solutions by ICAP},
author = {S Ražić and M Todorović and I Holclajtner-Antunović and Z Ilić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-2542565401&partnerID=40&md5=5ef8d7f8615a11f71121fbd63946b8ae},
year = {1996},
date = {1996-01-01},
journal = {Fresenius' Journal of Analytical Chemistry},
volume = {355},
number = {3-4},
pages = {274-276},
abstract = {The effect of the addition of ethanol to aqueous solutions of various trace elements (Ca, Cd, Mg, Cu and Ni) on their spectral line intensities in inductively coupled argon plasma (ICAP) was investigated. Using a relatively low ethanol content (up to 10%, v/v) an enhancement of both atomic and ionic lines was found but to a different extent. By optimization of experimental parameters, an improvement of the sensitivity of the multielemental analysis was obtained. © Springer-Verlag 1996.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The effect of the addition of ethanol to aqueous solutions of various trace elements (Ca, Cd, Mg, Cu and Ni) on their spectral line intensities in inductively coupled argon plasma (ICAP) was investigated. Using a relatively low ethanol content (up to 10%, v/v) an enhancement of both atomic and ionic lines was found but to a different extent. By optimization of experimental parameters, an improvement of the sensitivity of the multielemental analysis was obtained. © Springer-Verlag 1996.
Mioč, U B; Davidović, M; Stanisavljević, B R; Todorović, M R; Nedić, Z P; Uskoković, S
In: Journal of the Serbian Chemical Society, vol. 61, no. 9, pp. 759-765, 1996.
@article{Mioč1996759,
title = {Spectroscopic investigation of the effects of monovalent cations on the dynamics of protonic species in the hydrates of 12-tungstophosphoric acid salts},
author = {U B Mioč and M Davidović and B R Stanisavljević and M R Todorović and Z P Nedić and S Uskoković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030508181&partnerID=40&md5=2b03eaa6a7023d52c147d715b93d26e5},
year = {1996},
date = {1996-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {61},
number = {9},
pages = {759-765},
abstract = {Heteropoly acids arc well known as supcrionic protonic conductors at room temperature. The conductivity depends upon the temperature and relative humidity of the surrounding. Recent results show that the conductivity is very much affected by monovalent exchange counter-ions. In this work the effect of monovalent ions (Li + , Na + , K + and Cs + ) on the nature and structure of hydrogen bonds, the presence of different protonic species as charge carriers, and the dynamic equilibrium of proton species as a function of temperature and ion characteristics were investigated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Heteropoly acids arc well known as supcrionic protonic conductors at room temperature. The conductivity depends upon the temperature and relative humidity of the surrounding. Recent results show that the conductivity is very much affected by monovalent exchange counter-ions. In this work the effect of monovalent ions (Li + , Na + , K + and Cs + ) on the nature and structure of hydrogen bonds, the presence of different protonic species as charge carriers, and the dynamic equilibrium of proton species as a function of temperature and ion characteristics were investigated.
Kapetanović, V P; Serafimovska, A S; Veselinović, D S; Živanov-Stakić, D S
Polarographic and spectrophotometric investigation of cefachlor - Cu(II) complex Journal Article
In: Journal of the Serbian Chemical Society, vol. 61, no. 3, pp. 165-172, 1996.
@article{Kapetanović1996165,
title = {Polarographic and spectrophotometric investigation of cefachlor - Cu(II) complex},
author = {V P Kapetanović and A S Serafimovska and D S Veselinović and D S Živanov-Stakić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030544107&partnerID=40&md5=98c42a94f41066c7b0ad3d72af6a6687},
year = {1996},
date = {1996-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {61},
number = {3},
pages = {165-172},
abstract = {It has been found using polarographic measurements that cefachlor (CEFCl) forms a complex [Cu(CEFCl)] + with Cu(II) ions in Britton-Robinson's buffer, at pH = 8.0. The stability constant of this complex is log β 1 = 8.55. In an unbuffered medium complexes [Cu(CEFCl)] + and [Cu(CEFCl) 2 ] are formed, having stability constants log β 1 = 10.32 and log β 2 = 1134, respectively, at 20°C, and an ionic strenght of I = 0.2 mol/dm 3 . It has also been found that the stability constants are strongly influenced by buffer components. The formation of [Cu(CEFCl)] + was proved spectrophotometrically.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
It has been found using polarographic measurements that cefachlor (CEFCl) forms a complex [Cu(CEFCl)] + with Cu(II) ions in Britton-Robinson's buffer, at pH = 8.0. The stability constant of this complex is log β 1 = 8.55. In an unbuffered medium complexes [Cu(CEFCl)] + and [Cu(CEFCl) 2 ] are formed, having stability constants log β 1 = 10.32 and log β 2 = 1134, respectively, at 20°C, and an ionic strenght of I = 0.2 mol/dm 3 . It has also been found that the stability constants are strongly influenced by buffer components. The formation of [Cu(CEFCl)] + was proved spectrophotometrically.
Vidić, J; Sužnjević, D; Erceg, M; Vučelić, D
Behaviour of β2-microglobulin in the electrical double layer of the mercury|solution interface Journal Article
In: Bioelectrochemistry and Bioenergetics, vol. 39, no. 1, pp. 129-134, 1996.
@article{Vidić1996129,
title = {Behaviour of β2-microglobulin in the electrical double layer of the mercury|solution interface},
author = {J Vidić and D Sužnjević and M Erceg and D Vučelić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-16144368285&doi=10.1016%2f0302-4598%2895%2901874-3&partnerID=40&md5=9abb12b1a8d02ecbe921f6b6b5bae30d},
doi = {10.1016/0302-4598(95)01874-3},
year = {1996},
date = {1996-01-01},
journal = {Bioelectrochemistry and Bioenergetics},
volume = {39},
number = {1},
pages = {129-134},
abstract = {β2-Microglobulin (β2-m) is a small globular protein (12000 Da) which exists as a monomer in numerous body fluids. Data published on the electrochemical behaviour of β2-m are scarce. In this paper an attempt was made to get more information on the structure of the double layer at mercury |solution interface in the presence of ß2-m. Using phase selective ac polarography the capacitive current-potential (C-E) curve was analysed as the function of various β2-m concentration, pH of medium, temperature, denaturation agent concentration etc. The data obtained are discussed particularly from the aspect of folding/unfolding state of the protein studied.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
β2-Microglobulin (β2-m) is a small globular protein (12000 Da) which exists as a monomer in numerous body fluids. Data published on the electrochemical behaviour of β2-m are scarce. In this paper an attempt was made to get more information on the structure of the double layer at mercury |solution interface in the presence of ß2-m. Using phase selective ac polarography the capacitive current-potential (C-E) curve was analysed as the function of various β2-m concentration, pH of medium, temperature, denaturation agent concentration etc. The data obtained are discussed particularly from the aspect of folding/unfolding state of the protein studied.
Pophristić, M; Pešić, D S; Antic-Jovanović, A; Bojović, V
Rotation analysis of the B-X 0-1 bands of GaO Journal Article
In: Spectroscopy Letters, vol. 29, no. 1, pp. 61-68, 1996.
@article{Pophristić199661,
title = {Rotation analysis of the B-X 0-1 bands of GaO},
author = {M Pophristić and D S Pešić and A Antic-Jovanović and V Bojović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1242278739&doi=10.1080%2f00387019608001581&partnerID=40&md5=fe8dec989e0fe8572733530c12f04252},
doi = {10.1080/00387019608001581},
year = {1996},
date = {1996-01-01},
journal = {Spectroscopy Letters},
volume = {29},
number = {1},
pages = {61-68},
abstract = {The 0-1 band of the B2Σ+-X2Σ+ system of 69Ga16O and 71Ga16O has been measured and rotationally assigned. Principal molecular constants (T01, B0', B1", Bc", D0', D1",αe") have been obtained.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The 0-1 band of the B2Σ+-X2Σ+ system of 69Ga16O and 71Ga16O has been measured and rotationally assigned. Principal molecular constants (T01, B0', B1", Bc", D0', D1",αe") have been obtained.
Holclajtner-Antunović, I; Raspopović, Z; Georgijević, V; Tripković, M; Georgijević, J
Parametric analysis of the inductively coupled plasma Journal Article
In: Analytical and Bioanalytical Chemistry, vol. 356, no. 8, pp. 471-475, 1996.
@article{Holclajtner-Antunović1996471,
title = {Parametric analysis of the inductively coupled plasma},
author = {I Holclajtner-Antunović and Z Raspopović and V Georgijević and M Tripković and J Georgijević},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-11644309389&doi=10.1007%2fs0021663560471&partnerID=40&md5=16b219a7f426f538326e2dc6c05ebe99},
doi = {10.1007/s0021663560471},
year = {1996},
date = {1996-01-01},
journal = {Analytical and Bioanalytical Chemistry},
volume = {356},
number = {8},
pages = {471-475},
abstract = {A systematic parametric study of an LTE (local thermodynamic equilibrium) mathematical model of pure inductively coupled argon plasma (ICAP) used for spectrochemical purposes was performed by means of computer simulations. The spatial distributions of temperature, gas velocity, magnetic field and energy losses were investigated under typical plasma operating conditions as function of the ICAP geometrical dimensions and dynamic parameters. These theoretical calculations can be used to predict the properties of the applied plasma in the course of practical work, to choose the optimal conditions by changing the operating parameters and to interpret existing analytical results. © Springer-Verlag 1996.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A systematic parametric study of an LTE (local thermodynamic equilibrium) mathematical model of pure inductively coupled argon plasma (ICAP) used for spectrochemical purposes was performed by means of computer simulations. The spatial distributions of temperature, gas velocity, magnetic field and energy losses were investigated under typical plasma operating conditions as function of the ICAP geometrical dimensions and dynamic parameters. These theoretical calculations can be used to predict the properties of the applied plasma in the course of practical work, to choose the optimal conditions by changing the operating parameters and to interpret existing analytical results. © Springer-Verlag 1996.
Veselinović, D S; Vukić, M R; Marković, V G; Mirjanić, M D
Crystalline forms of silver iodide I. Synthesis and X-ray diffraction investigations Journal Article
In: Journal of the Serbian Chemical Society, vol. 61, no. 1, pp. 31-38, 1996.
@article{Veselinović199631,
title = {Crystalline forms of silver iodide I. Synthesis and X-ray diffraction investigations},
author = {D S Veselinović and M R Vukić and V G Marković and M D Mirjanić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030549634&partnerID=40&md5=73a3ca17c617e750d9a0788c5e4a9563},
year = {1996},
date = {1996-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {61},
number = {1},
pages = {31-38},
abstract = {A procedure has been developed for the synthesis of AgI giving β-AgI with 2.4%y-AgI and γ-AgI with 3.2% β-AgI. Samples are well crystallized and small. Mechanical grinding results in the transformation of β-AgI into γ-AgI while an elevated temperature has the opposite effect, transforming γ-AgI into β-AgI. In some cases prolonged standing at room temperature increases the β-AgI content in γ-AgI samples.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A procedure has been developed for the synthesis of AgI giving β-AgI with 2.4%y-AgI and γ-AgI with 3.2% β-AgI. Samples are well crystallized and small. Mechanical grinding results in the transformation of β-AgI into γ-AgI while an elevated temperature has the opposite effect, transforming γ-AgI into β-AgI. In some cases prolonged standing at room temperature increases the β-AgI content in γ-AgI samples.
Marković, D A; Djarmati, Z; Jankov, R M; Marković, D M; Ignjatović, L M
Electrochemical Behaviour of Rosmanol 9-Ethyl Ether, a Diterpene Lactone Antioxidant Isolated from Sage Journal Article
In: Mikrochimica Acta, vol. 124, no. 3-4, pp. 219-226, 1996.
@article{Marković1996219,
title = {Electrochemical Behaviour of Rosmanol 9-Ethyl Ether, a Diterpene Lactone Antioxidant Isolated from Sage},
author = {D A Marković and Z Djarmati and R M Jankov and D M Marković and L M Ignjatović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0042518778&doi=10.1007%2fBF01242819&partnerID=40&md5=0372c0f1fd2e2fbf521feb07bac3e5aa},
doi = {10.1007/BF01242819},
year = {1996},
date = {1996-01-01},
journal = {Mikrochimica Acta},
volume = {124},
number = {3-4},
pages = {219-226},
abstract = {The electrochemical behaviour and mechanism of the redox process of the natural antioxidant rosmanol 9-ethyl ether, isolated from Saliva officinalis L., were studied. The cyclic voltammograms of rosmanol 9-ethyl ether (R9EE), at characteristic pH values, and the electrochemical parameters for all investigated pH values were measured. Three characteristic pH regions, each with different behaviour of R9EE, were identified. In regions of pH < 4 and pH > 5 only one anodic peak appeared, whereas in the solutions of pH 4-5 two anodic peaks could be noted. The overall oxidation mechanism at pH < 4 is an e.H.e.H. oxidation mechanism, which as a final product gives a quinonic molecule. The influence of pH on the second oxidation peak potential tends towards zero in accordance with the preceding dissociation of the one of phenolic groups, thus suggesting an e.e.H. mechanism at pH > 5. This means that at the pH values expected in plant cells, R9EE has an unexpected structure, making this substance a potent antioxidant. Electrochemical and spectrophotometric measurements enabled us to establish an extremely low pKa value (4.35) for R9EE.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The electrochemical behaviour and mechanism of the redox process of the natural antioxidant rosmanol 9-ethyl ether, isolated from Saliva officinalis L., were studied. The cyclic voltammograms of rosmanol 9-ethyl ether (R9EE), at characteristic pH values, and the electrochemical parameters for all investigated pH values were measured. Three characteristic pH regions, each with different behaviour of R9EE, were identified. In regions of pH < 4 and pH > 5 only one anodic peak appeared, whereas in the solutions of pH 4-5 two anodic peaks could be noted. The overall oxidation mechanism at pH < 4 is an e.H.e.H. oxidation mechanism, which as a final product gives a quinonic molecule. The influence of pH on the second oxidation peak potential tends towards zero in accordance with the preceding dissociation of the one of phenolic groups, thus suggesting an e.e.H. mechanism at pH > 5. This means that at the pH values expected in plant cells, R9EE has an unexpected structure, making this substance a potent antioxidant. Electrochemical and spectrophotometric measurements enabled us to establish an extremely low pKa value (4.35) for R9EE.
Poleksic, L; Musikic, P; Zdravkovic, D; Watt, I; Bacic, G
MRI evaluation of the knee in rheumatoid arthritis Journal Article
In: British Journal of Rheumatology, vol. 35, no. SUPPL. 3, pp. 36-39, 1996.
@article{Poleksic199636,
title = {MRI evaluation of the knee in rheumatoid arthritis},
author = {L Poleksic and P Musikic and D Zdravkovic and I Watt and G Bacic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030476155&partnerID=40&md5=15a1777a4bdf8aa02e5d919024c37c79},
year = {1996},
date = {1996-01-01},
journal = {British Journal of Rheumatology},
volume = {35},
number = {SUPPL. 3},
pages = {36-39},
abstract = {The knees of forty-three patients suffering from rheumatoid arthritis (RA) were examined using pre- and post-contrast MRI in an attempt to assess the extent and frequency of all abnormalities in the RA knee. Features evaluated by MRI were: synovial thickening, joint effusion, bone destruction, popliteal cysts, periarticular soft tissue swelling, abnormal tendons and bone marrow changes. A scoring system (0-2) was used to determine the relationship between the various signs of RA in order to identify those that may be relevant for the assessment of therapeutic response. It seems that the assessment of inflamed synovium is the major criterion for the determination of disease activity in RA.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The knees of forty-three patients suffering from rheumatoid arthritis (RA) were examined using pre- and post-contrast MRI in an attempt to assess the extent and frequency of all abnormalities in the RA knee. Features evaluated by MRI were: synovial thickening, joint effusion, bone destruction, popliteal cysts, periarticular soft tissue swelling, abnormal tendons and bone marrow changes. A scoring system (0-2) was used to determine the relationship between the various signs of RA in order to identify those that may be relevant for the assessment of therapeutic response. It seems that the assessment of inflamed synovium is the major criterion for the determination of disease activity in RA.
1995
Pophristić, M; Pešić, D S
Rotation analysis of the b-x 0-1 bands of GaO Journal Article
In: Journal of Environmental Science and Health. Part A: Environmental Science and Engineering and Toxicology, vol. 30, no. 7, pp. 1561-1568, 1995.
@article{Pophristić19951561,
title = {Rotation analysis of the b-x 0-1 bands of GaO},
author = {M Pophristić and D S Pešić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029130461&doi=10.1080%2f10934529509376286&partnerID=40&md5=edc704bd5ffbfb84427f1554106093ff},
doi = {10.1080/10934529509376286},
year = {1995},
date = {1995-01-01},
journal = {Journal of Environmental Science and Health. Part A: Environmental Science and Engineering and Toxicology},
volume = {30},
number = {7},
pages = {1561-1568},
abstract = {The 0-1 band of the B2Σ+-X2Σ+system of 69Ga16O and 71Ga16O has been measured and rotationally assigned. Principal molecular constants (T01, B0’, B1“, Bc”, D0,D1“,αc”) have been obtained. Copyright © 1995 Taylor & Francis Group, LLC. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The 0-1 band of the B2Σ+-X2Σ+system of 69Ga16O and 71Ga16O has been measured and rotationally assigned. Principal molecular constants (T01, B0’, B1“, Bc”, D0,D1“,αc”) have been obtained. Copyright © 1995 Taylor & Francis Group, LLC. All rights reserved.
Vanlić-Razumenić, N; Janković, D; Veselinović, D
Oxidation states of technetium in diphosphonate complexes Journal Article
In: Journal of Radioanalytical and Nuclear Chemistry Articles, vol. 190, no. 1, pp. 149-154, 1995.
@article{Vanlić-Razumenić1995149,
title = {Oxidation states of technetium in diphosphonate complexes},
author = {N Vanlić-Razumenić and D Janković and D Veselinović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0028963525&doi=10.1007%2fBF02035645&partnerID=40&md5=eca57425eef53d82585ca2a617809193},
doi = {10.1007/BF02035645},
year = {1995},
date = {1995-01-01},
journal = {Journal of Radioanalytical and Nuclear Chemistry Articles},
volume = {190},
number = {1},
pages = {149-154},
abstract = {Valence states of technetium in two most prominent bone imaging agents. i.e., their model complexes with99Tc (99Tc-MDP and99Tc-DPD) were determined by redox potentiometric titration. Titrations of99Tc-pertechnetate by Sn(II) solutions were performed in the presence of a ligand (MDP or DPD), as well as without them. Tc(III) was obtained in complexes with MDP and DPD in strongly alkaline medium (pH 12-13) while in the absence of the ligands Tc(IV) was formed. In strongly acidic medium (pH 2-3) the redox process resulted Tc(IV) in both complexes, while Tc(III) was formed in the absence of the ligands. At pH values near neutral or exactly neutral (important for radiopharmaceutical complexes99mTc-MDP and99mTc-DPD), it was possible to perform titrations in the ligand absence only at pH values from 7 to 11.8 (due to in hydrolysis) while the resulting oxidation state of Tc in the presence of ligand depended on the used ligand: Tc(IV)-MDP (pH 5.4-5.9 and pH 7.0-7.4), and Tc(III)-DPD (pH 8.0). © 1995 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Valence states of technetium in two most prominent bone imaging agents. i.e., their model complexes with99Tc (99Tc-MDP and99Tc-DPD) were determined by redox potentiometric titration. Titrations of99Tc-pertechnetate by Sn(II) solutions were performed in the presence of a ligand (MDP or DPD), as well as without them. Tc(III) was obtained in complexes with MDP and DPD in strongly alkaline medium (pH 12-13) while in the absence of the ligands Tc(IV) was formed. In strongly acidic medium (pH 2-3) the redox process resulted Tc(IV) in both complexes, while Tc(III) was formed in the absence of the ligands. At pH values near neutral or exactly neutral (important for radiopharmaceutical complexes99mTc-MDP and99mTc-DPD), it was possible to perform titrations in the ligand absence only at pH values from 7 to 11.8 (due to in hydrolysis) while the resulting oxidation state of Tc in the presence of ligand depended on the used ligand: Tc(IV)-MDP (pH 5.4-5.9 and pH 7.0-7.4), and Tc(III)-DPD (pH 8.0). © 1995 Akadémiai Kiadó.
Kolar-Anić, L J; Misljenović, D J; Anić, S; Nicolis, G
Influence of the reduction of iodate ion by hydrogen peroxide on the model of the Bray-Liebhafsky reaction Journal Article
In: Reaction Kinetics and Catalysis Letters, vol. 54, no. 1, pp. 35-41, 1995.
@article{Kolar-Anić199535,
title = {Influence of the reduction of iodate ion by hydrogen peroxide on the model of the Bray-Liebhafsky reaction},
author = {L J Kolar-Anić and D J Misljenović and S Anić and G Nicolis},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0029234098&doi=10.1016%2f0133-1736%2895%2992708-F&partnerID=40&md5=68e152a88215f8436d8b5c3fa6e380d2},
doi = {10.1016/0133-1736(95)92708-F},
year = {1995},
date = {1995-01-01},
journal = {Reaction Kinetics and Catalysis Letters},
volume = {54},
number = {1},
pages = {35-41},
abstract = {The reduction of iodate ion by hydrogen peroxide, originally postulated by Liebhafsky, is considered as a possible step in the kinetic model proposed by Kolar-Anić and G. Schmitz for the overall Bray-Liebhafsky oscillatory process. © 1995 Akadémiai Kiadó, Budapest.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The reduction of iodate ion by hydrogen peroxide, originally postulated by Liebhafsky, is considered as a possible step in the kinetic model proposed by Kolar-Anić and G. Schmitz for the overall Bray-Liebhafsky oscillatory process. © 1995 Akadémiai Kiadó, Budapest.
Perić, M; Thümmel, H; Marian, C M; Peyerimhoff, S D
Ab initio study of the vibronic and spin-orbit coupling in the X 2Πu state of C2H2+ Journal Article
In: The Journal of Chemical Physics, vol. 102, no. 18, pp. 7142-7149, 1995.
@article{Perić19957142,
title = {Ab initio study of the vibronic and spin-orbit coupling in the X 2Πu state of C2H2+},
author = {M Perić and H Thümmel and C M Marian and S D Peyerimhoff},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0001464867&doi=10.1063%2f1.469108&partnerID=40&md5=03f29cd2956329ee6bcaac8c6c272dfc},
doi = {10.1063/1.469108},
year = {1995},
date = {1995-01-01},
journal = {The Journal of Chemical Physics},
volume = {102},
number = {18},
pages = {7142-7149},
abstract = {A variational approach for treating the Renner-Teller effect in tetra-atomic molecules [Perić et al., Mol. Phys. 55, 1159 (1985)] is extended to account for the effect of spin-orbit coupling. The approach is applied to compute the spin-orbit splittings of the vibronic levels in the X 2Πu state of C2H2+. The bending potential curves employed in a previous study [Perić and Peyerimhoff, J. Chem. Phys. (in press)] are improved by carrying out ab initio calculations at a higher level of sophistication. The results of the computations enable a reliable interpretation of recent experimental findings [Pratt et al., J. Chem. Phys., 99, 66 (1993)]. © 1995 American Institute of Physics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A variational approach for treating the Renner-Teller effect in tetra-atomic molecules [Perić et al., Mol. Phys. 55, 1159 (1985)] is extended to account for the effect of spin-orbit coupling. The approach is applied to compute the spin-orbit splittings of the vibronic levels in the X 2Πu state of C2H2+. The bending potential curves employed in a previous study [Perić and Peyerimhoff, J. Chem. Phys. (in press)] are improved by carrying out ab initio calculations at a higher level of sophistication. The results of the computations enable a reliable interpretation of recent experimental findings [Pratt et al., J. Chem. Phys., 99, 66 (1993)]. © 1995 American Institute of Physics.
Dimitrijević, R Ž; Colomban, Ph.; Mioč, U B; Nedić, Z; Todorović, M R; Tjapkin, N; Davidović, M
In: Solid State Ionics, vol. 77, no. C, pp. 250-256, 1995.
@article{Dimitrijević1995250,
title = {Synthesis, conductivity and structural characterization of phosphorous bronzes originating from heteropolyacids. Relation with similar proton containing phases},
author = {R Ž Dimitrijević and Ph. Colomban and U B Mioč and Z Nedić and M R Todorović and N Tjapkin and M Davidović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0042840242&doi=10.1016%2f0167-2738%2894%2900310-O&partnerID=40&md5=6da2ff29353d5ebf557817b7443bfbf2},
doi = {10.1016/0167-2738(94)00310-O},
year = {1995},
date = {1995-01-01},
journal = {Solid State Ionics},
volume = {77},
number = {C},
pages = {250-256},
abstract = {The phosphorus doped molybdenum oxide compound (P0.18Mo4.00O12.66), isostructural with molybdite was synthesized in the process of thermally induced phase transformation of 12-molybdophosphoric acid. The synthesized phases (low and high temperature) and the precursor compound (Q-phase) have been characterized by thermal (DTA and TGA), X-ray powder diffraction, electron scanning microscopy and spectroscopic (IR) methods. The temperature dependence of electric conductivity σ(ω → 0) is discussed. It was concluded that the electronic conductivities of bronzes obtained from heteropolyacids are very similar to those of corresponding anhydrous polyacids. © 1995.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The phosphorus doped molybdenum oxide compound (P0.18Mo4.00O12.66), isostructural with molybdite was synthesized in the process of thermally induced phase transformation of 12-molybdophosphoric acid. The synthesized phases (low and high temperature) and the precursor compound (Q-phase) have been characterized by thermal (DTA and TGA), X-ray powder diffraction, electron scanning microscopy and spectroscopic (IR) methods. The temperature dependence of electric conductivity σ(ω → 0) is discussed. It was concluded that the electronic conductivities of bronzes obtained from heteropolyacids are very similar to those of corresponding anhydrous polyacids. © 1995.
1994
Davidović, M; Tjapkin, N; Mioč, U B; Colomban, Ph.
Dynamics investigations of the proton conductor 12-tungstophosphoric acid by neutron scattering Journal Article
In: Acta Physica Hungarica, vol. 75, no. 1-4, pp. 285-289, 1994.
@article{Davidović1994285,
title = {Dynamics investigations of the proton conductor 12-tungstophosphoric acid by neutron scattering},
author = {M Davidović and N Tjapkin and U B Mioč and Ph. Colomban},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-3743118574&doi=10.1007%2fBF03156590&partnerID=40&md5=96d2c904203b80686b9f4de8d5281321},
doi = {10.1007/BF03156590},
year = {1994},
date = {1994-01-01},
journal = {Acta Physica Hungarica},
volume = {75},
number = {1-4},
pages = {285-289},
abstract = {Compared with other spectroscopic techniques, the method of inelastic incoherent neutron scattering (IINS), owing to extraordinary large cross-section of hydrogen for incoherent scattering, has great advantages in the investigation of the dynamics of protons in compound where they are surrounded by heavy atoms. For proton conductors, this technique enables the identification of various protonic species, determination of their dynamics, as well as the dynamics of heavy atoms to a measure in which they are bonded to hydrogen. Here we discuss the IINS spectra obtained with a pulsed neutron source, during the dehydration process of 12-tungstophosphoric acid 6-hydrate (H5O2)3*(PW12O40). © 1994 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Compared with other spectroscopic techniques, the method of inelastic incoherent neutron scattering (IINS), owing to extraordinary large cross-section of hydrogen for incoherent scattering, has great advantages in the investigation of the dynamics of protons in compound where they are surrounded by heavy atoms. For proton conductors, this technique enables the identification of various protonic species, determination of their dynamics, as well as the dynamics of heavy atoms to a measure in which they are bonded to hydrogen. Here we discuss the IINS spectra obtained with a pulsed neutron source, during the dehydration process of 12-tungstophosphoric acid 6-hydrate (H5O2)3*(PW12O40). © 1994 Akadémiai Kiadó.
Tripković, M; Todorović, M; Holclajtner-Antunović, I
Spectrometric determination of gold, platinum and palladium in geological materials by d.c. arc plasma Journal Article
In: Analytica Chimica Acta, vol. 296, no. 3, pp. 315-323, 1994.
@article{Tripković1994315,
title = {Spectrometric determination of gold, platinum and palladium in geological materials by d.c. arc plasma},
author = {M Tripković and M Todorović and I Holclajtner-Antunović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0027938701&doi=10.1016%2f0003-2670%2894%2980251-3&partnerID=40&md5=65e8bcd15e68f187cf0ac9c3f2081127},
doi = {10.1016/0003-2670(94)80251-3},
year = {1994},
date = {1994-01-01},
journal = {Analytica Chimica Acta},
volume = {296},
number = {3},
pages = {315-323},
abstract = {A method for the separation and determination of Pt, Au and Pd in various geologcial materials by coprecipitation with tellurium and applying two spectrometric methods was considered in detail. Particular attention was paid to the influence of matrix elements on the determination of these metals. In one instance the metals were determined in solution by applying a U-shaped arc stabilized by an argon vortex and in the other in the solid sample by applying a vertical arc burning in a stream of argon-oxygen. The accuracy of the method was verified using the international reference standard SARM-7, and the results achieved were compared with published data. © 1994.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A method for the separation and determination of Pt, Au and Pd in various geologcial materials by coprecipitation with tellurium and applying two spectrometric methods was considered in detail. Particular attention was paid to the influence of matrix elements on the determination of these metals. In one instance the metals were determined in solution by applying a U-shaped arc stabilized by an argon vortex and in the other in the solid sample by applying a vertical arc burning in a stream of argon-oxygen. The accuracy of the method was verified using the international reference standard SARM-7, and the results achieved were compared with published data. © 1994.
Petković, M D J; Milonjić, S K; Dondur, V T
Determination of surface ionization and complexation constants at colloidal aluminum oxide/electrolyte interface Journal Article
In: Separation Science and Technology, vol. 29, no. 5, pp. 627-638, 1994.
@article{Petković1994627,
title = {Determination of surface ionization and complexation constants at colloidal aluminum oxide/electrolyte interface},
author = {M D J Petković and S K Milonjić and V T Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84963435891&doi=10.1080%2f01496399408000171&partnerID=40&md5=747ddb9088002e44891be29860bc80d4},
doi = {10.1080/01496399408000171},
year = {1994},
date = {1994-01-01},
journal = {Separation Science and Technology},
volume = {29},
number = {5},
pages = {627-638},
abstract = {The sorption of various inorganic anions (nitrate, chloride, bromide, and iodide) at a colloidal aluminum oxide/water interface was investigated by the Potentiometric titration method. The triple-layer model was applied to interpret the experimental data obtained. The intrinsic protonation constant of hydroxyl groups () was determined and is given as a mean value of 4.9. The intrinsic surface complexation constants (p★ ) for nitrate, chloride, bromide, and iodide were determined and are presented as 5.6, 5.4, 5.5, and 5.5, respectively. The values obtained indicate that the sorption of all the anions examined has mainly a nonspecific character. © 1994, Taylor & Francis Group, LLC. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The sorption of various inorganic anions (nitrate, chloride, bromide, and iodide) at a colloidal aluminum oxide/water interface was investigated by the Potentiometric titration method. The triple-layer model was applied to interpret the experimental data obtained. The intrinsic protonation constant of hydroxyl groups () was determined and is given as a mean value of 4.9. The intrinsic surface complexation constants (p★ ) for nitrate, chloride, bromide, and iodide were determined and are presented as 5.6, 5.4, 5.5, and 5.5, respectively. The values obtained indicate that the sorption of all the anions examined has mainly a nonspecific character. © 1994, Taylor & Francis Group, LLC. All rights reserved.
Antić-Jovanović, A; Bojovic, V D; Pešić, D S
New bands of the isotopic gao molecules Journal Article
In: Spectroscopy Letters, vol. 27, no. 2, pp. 247-256, 1994.
@article{Antić-Jovanović1994247,
title = {New bands of the isotopic gao molecules},
author = {A Antić-Jovanović and V D Bojovic and D S Pešić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-84972955603&doi=10.1080%2f00387019408000840&partnerID=40&md5=bf74e4ba1b46df3f14aeaf47d525d501},
doi = {10.1080/00387019408000840},
year = {1994},
date = {1994-01-01},
journal = {Spectroscopy Letters},
volume = {27},
number = {2},
pages = {247-256},
abstract = {The new bands of the B2∑+-X2∑+ system (330-420 nm) of 69Gal6O, 69Ga18O,71Ga1
pubstate = {published},
tppubtype = {article}
}
The new bands of the B2∑+-X2∑+ system (330-420 nm) of 69Gal6O, 69Ga18O,71Ga1<sO and 71GalsO molecules have been obtained in a low-pressure arc. The vibrational constants wex and weye for all isotopic species have been derived for both states included in transition. Intensity distribution of the bands in the system have been verified by Franck-Condon factors. © 1994, Taylor & Francis Group, LLC. All rights reserved.