FFH scientific research papers database
FFH database search (1991-2022):
Milosavljević, V; Konjević, R; Djeniže, S
Temperature dependence of Stark width of the 463.054 nm NII spectral line Journal Article
In: Astronomy and Astrophysics Supplement Series, vol. 135, no. 3, pp. 565-569, 1999.
@article{Milosavljević1999565,
title = {Temperature dependence of Stark width of the 463.054 nm NII spectral line},
author = {V Milosavljević and R Konjević and S Djeniže},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000600938&doi=10.1051%2faas%3a1999189&partnerID=40&md5=bf3ab117c4d2815800506202e9180aff},
doi = {10.1051/aas:1999189},
year = {1999},
date = {1999-01-01},
journal = {Astronomy and Astrophysics Supplement Series},
volume = {135},
number = {3},
pages = {565-569},
abstract = {Stark width of the 463.054 nm singly ionized nitrogen spectral line, that belong to 3s - 3p transition, have been measured in a linear pulsed, low pressure, arc discharge. The working gas was helium-nitrogen-oxygen mixture. Electron densities of 0.751023 m-3 to 1.451023 m-3 were determined in the electron temperature range between 30000 K - 38000 K. The measured values have been compared with our calculated data, using the modified semiempirical approximation. On the basis of the agreement among experimental and theoretical Stark width data, the isolated 463.054 nm NII spectral line can be recommended as convenient spectral line for plasma diagnostics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gizdavic, M; Adnadjevic, B
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 193-203, 1999.
@article{Gizdavic1999193,
title = {Semiquantitative X-ray structural method for determining phase composition of ultradisperse powders of Si 3 N 4 obtained by a plasmachemical procedure},
author = {M Gizdavic and B Adnadjevic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749312874&partnerID=40&md5=8ff1a94b8620e3b319d9a27b46c64455},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {193-203},
abstract = {Nine samples of ultradisperse powders of Si 3 N 4 were synthesized using a new plasmachemical procedure. An attempt was made to determine the phase composition of samples using the Cullity X-ray structural method. Discrepancy was established between the results of the Cullity phase analysis and the given physicochemical characteristics of Si 3 N 4 . Because of that, we developed a semiquantitative X-ray structural method for the determination of the phase content of the Si 3 N 4 samples. The semiquantitative X-ray structural method enables work with all maxima (hkl) which appear in the diffractogram, and doesn't require standard sample. The phase composition of investigated samples which was determined using this method is in accord with phase composition determined on the basis of chemical composition. © 1999 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gizdavic, M; Adnadjevic, B
Semiquantitative IR method for determining phase composition of ultradisperse powders of Si 3 N 4 + Journal Article
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 183-192, 1999.
@article{Gizdavic1999183,
title = {Semiquantitative IR method for determining phase composition of ultradisperse powders of Si 3 N 4 +},
author = {M Gizdavic and B Adnadjevic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749277878&partnerID=40&md5=b0fb43f8a28891a1f04a10d0b2847570},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {183-192},
abstract = {An IR method was used for determining phase composition of nine samples of ultradisperse powders (UDP) of Si 3 N 4 which have been synthesized by plasmachemical procedure. In samples taken from the filter (α + β)Si 3 N 4 completely prevailed, while in samples taken from the plasma aggregate walls there was 33-42% of unreacted Si. The high correlation of the obtained results was established in relation to the phase analysis results of the examined samples obtained on the basis of X-ray structural analysis, and to physico-chemical characteristics of powders (specific surface (S), particle diameter (d) and chemical analysis). © 1999 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Baranac, J M; Petranović, N A; Dimitrić-Marković, J M
A spectrophotometric study of the reaction of copigmentation of malvin and tannic acid Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 10, pp. 599-608, 1999.
@article{Baranac1999599,
title = {A spectrophotometric study of the reaction of copigmentation of malvin and tannic acid},
author = {J M Baranac and N A Petranović and J M Dimitrić-Marković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033432409&partnerID=40&md5=2aa0b4158bf41e2747230431b0326c67},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {10},
pages = {599-608},
abstract = {The reaction of copigmentation of malvidin 3,5-diglucoside and tannic acid of the ester type was studied. The interactions of these molecules were observed via UV-VIS absorption spectroscopy. It was established that the pH of the medium, the concentration of the copigmentating molecules, and the temperature affect the copigmentation process. The calculated equilibrium constant of the reaction of pH 3.00 is K = 226.9, and at pH 3.65 it is K = 277.0. The change of the Gibbs free energy in pH 3.00 buffer is ΔG = -13.4 kJ/mol, and in pH 3.65 buffer it is ΔG = -13.9 kJ/mol. The stoichiometric ratio of the components in the copigment is 1:1, at both pH values. It is evident from the calculated values of the thermodynamic functions that the process is thermodynamically favorable in the lower temperature range. Temperature appears as the basic parameter of the thermodynamic feasability of the process, since the copigmentation process is exothermic (ΔH pH=3.00 = - 41.6 kJ/mol and ΔH pH=3.65 = - 41.6 kJ/mol) and proceeds with a decrease in entropy (ΔS pH=3.00 = - 94.4 J/mol K and ΔS pH=3.65 = -92.7 J/mol K).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Vukojević, V B; Pejić, N D; Stanisavljev, D R; Anić, S R; Kolar-Anić, L Z
In: Analyst, vol. 124, no. 2, pp. 147-152, 1999.
@article{Vukojević1999147,
title = {Determination of Cl - , Br - , I - , Mn 2+ , malonic acid and quercetin by perturbation of a non-equilibrium stationary state in the Bray-Liebhafsky reaction},
author = {V B Vukojević and N D Pejić and D R Stanisavljev and S R Anić and L Z Kolar-Anić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033002043&doi=10.1039%2fa807608a&partnerID=40&md5=bf1328af33543af0939ce9bcec884f0f},
doi = {10.1039/a807608a},
year = {1999},
date = {1999-01-01},
journal = {Analyst},
volume = {124},
number = {2},
pages = {147-152},
abstract = {A new method applying a non-linear chemical system under conditions far from thermodynamic equilibrium in microvolume/microconcentration quantitative analysis is described. The chemical system used as a matrix is the Bray-Liebhafsky reaction in a non-equilibrium stationary state close to a bifurcation point. The method is based on monitoring the response of this system to perturbations by Cl - , Br - , I - , Mn 2+ , malonic acid and quercetin analyte solutions, which are followed potentiometrically either by an Ag + /S 2- ion-sensitive or by a Pt electrode. A linear response of the potential shift versus the logarithm of the analyte concentrations is found in the following ranges: 1.3 X 10 -6 mol dm -3 ≤ [Cl - ] ≤ 1.6 x 10 -4 mol dm -3 , 1.0 x 10 -6 mol dm -3 ≤ [Br - ] ≤ 8.3 x 10 -5 mol dm -3 , 2.0 x 10 -6 mol dm -3 ≤ [I - ] ≤ 1.0 x 10 -4 mol dm -3 , 8.4 x 10 -7 mol dm -3 ≤ [Mn 2+ ] ≤ 8.3 x 10 -5 mol dm -3 , 3.8 x 10 -7 mol dm -3 ≤ [malonic acid] ≤ 2.1 x 10 -5 mol dm -3 and 1.5 x 10 -8 mol dm -3 ≤ [quercetin] ≤ 3.7 x 10 -5 mol dm -3 . Under the investigated conditions an improved detection limit for all halides tested is obtained. Unknown concentrations of the analytes can be determined from a standard series of calibration curves to an accuracy within ± 5%. In addition, the application of potentiometric measurements in microvolume/microconcentration quantitative analysis is diversified.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Šašić, S; Antić-Jovanović, A; Kuzmanović, M; Jeremić, M
Quantitative analysis of the Raman spectra of mixtures of weakly interacting components by factor analysis methods Journal Article
In: Analyst, vol. 124, no. 10, pp. 1481-1487, 1999.
@article{Šašić19991481,
title = {Quantitative analysis of the Raman spectra of mixtures of weakly interacting components by factor analysis methods},
author = {S Šašić and A Antić-Jovanović and M Kuzmanović and M Jeremić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032857150&doi=10.1039%2fa904633j&partnerID=40&md5=05d61db23a74084504dbe66e4b090e7c},
doi = {10.1039/a904633j},
year = {1999},
date = {1999-01-01},
journal = {Analyst},
volume = {124},
number = {10},
pages = {1481-1487},
abstract = {A system of 17 overlapped Raman spectra in the 250-350 cm -1 spectral region of the weakly interacting component mixture of 1,2-dichloroethane, dichloromethane and carbon tetrachloride has been subjected to the statistical methods of target factor analysis (TFA) and evolving factor analysis (EFA). The results have demonstrated that concentrations of substances with intense bands are successfully determined, however, there are difficulties in analyzing weak bands of one of the components, especially when applying a TFA technique. The results of such an analysis can be improved by minimal changes in one of the coordinates of a rotation vector. Comparison of these results with a synthetic spectral model suggests that problems with analysis of weak bands are caused by the presence of a strong band that greatly overlaps the weak one.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
PeriĆ, M; OstojiĆ, B
In: Molecular Physics, vol. 97, no. 6, pp. 743-751, 1999.
@article{PeriĆ1999743,
title = {Theoretical investigation of the Renner-Teller effect in Δ electronic states of tetra-atomic molecules. 2. Perturbative calculation of the vibronic spectrum in the 11Δg state of B2H2 from the linear molecule standpoint},
author = {M PeriĆ and B OstojiĆ},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000994839&doi=10.1080%2f00268979909482874&partnerID=40&md5=514f026fc43e507ff469c8495e02ee47},
doi = {10.1080/00268979909482874},
year = {1999},
date = {1999-01-01},
journal = {Molecular Physics},
volume = {97},
number = {6},
pages = {743-751},
abstract = {Second-order perturbative formulae for handling the Renner-Teller effect in Δ electronic states of symmetric tetra-atomic molecules with linear equilibrium geometry are derived. They are applied to calculate vibronic energy levels of the 11Δg state of B2H2. Perturbative parameters are derived by fitting the ab initio computed potential energy surfaces. The results of the calculations are compared with those obtained by means of a variational approach. © 1999 Taylor & Francis Group, LLC.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Holclajtner-Antunović, I; Ražić, S; Todorović, M; Stoiljković, M
The influence of ethanol addition on excitation of aluminium in the argon stabilized d.c. arc Journal Article
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 83-93, 1999.
@article{Holclajtner-Antunović199983,
title = {The influence of ethanol addition on excitation of aluminium in the argon stabilized d.c. arc},
author = {I Holclajtner-Antunović and S Ražić and M Todorović and M Stoiljković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0012842139&partnerID=40&md5=d4a70fea9deb0c81a57f5e559ebd0f13},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {83-93},
abstract = {The effect of ethanol addition on the spectral line intensities of aluminium and excitation conditions in an argon stabilized d.c. arc was investigated. In order to find optimal conditions for trace elements determination, some experimental parameters, important for analytical capabilities of this plasma source, such as current intensity, spectroscopic buffer concentration and concentration of ethanol in aqueous-ethanol mixtures, were determined. The influence of ethanol addition on the nebulization efficiency and physical properties of the mixtures analyzed was examined too. The increase in intensity of Al atomic line in the presence of ethanol in concentration up to 20%, can be partly explained by higher nebulization efficiency. The other reason lies in the changes in the excitation and ionization processes, which was confirmed by the measurements of excitation temperature and electron number density. © 1999 Akadémiai Kiadó,.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Vujisić, B; Antić-Jovanović, A; Bojović, V; Pešić, D S; Pophristić, M
New rotational analysis of the B2Σ+-X2Σ+ bands in 69Ga16O and 71Ga16O Journal Article
In: Journal of Molecular Spectroscopy, vol. 193, no. 2, pp. 389-395, 1999.
@article{Vujisić1999389,
title = {New rotational analysis of the B2Σ+-X2Σ+ bands in 69Ga16O and 71Ga16O},
author = {B Vujisić and A Antić-Jovanović and V Bojović and D S Pešić and M Pophristić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1242278740&doi=10.1006%2fjmsp.1998.7751&partnerID=40&md5=6c11a39b62140e3d8c6c287123e482cf},
doi = {10.1006/jmsp.1998.7751},
year = {1999},
date = {1999-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {193},
number = {2},
pages = {389-395},
abstract = {In the emission spectrum of the Ga16O molecule, the 0-0 and 1-0 bands of the B-X system have been rephotographed by means of conventional high-resolution spectroscopy. Clear resolution on the rotational structure near the band origins made it possible to perform reanalysis of the bands and derive new molecular constants characterizing 69Ga16O and 71Ga16O in the B2Σ+ and X2Σ+ states. © 1999 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Adamović, I; Parac, M; Hanrath, M; Perić, M
Ab initio study of the electronic spectrum of BeO Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 12, pp. 721-735, 1999.
@article{Adamović1999721,
title = {Ab initio study of the electronic spectrum of BeO},
author = {I Adamović and M Parac and M Hanrath and M Perić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033261237&partnerID=40&md5=28df283ef3206afcf0252eaaa55d0afe},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {12},
pages = {721-735},
abstract = {Low-lying singlet and triplet electronic states of the BeO molecule are calculated by means of the quantum chemical ab initio method. It was found that all states in the energy range from 0 to 50000 cm -1 are of valence character. Particular attention was paid to the investigation of the dissociative behavior of the states considered. The vibrational structure of the A 1 Π←Χ 1 Σ and B 1 Σ + ←X 1 Σ + spectral systems was calculated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bojović, V; Antić-Jovanović, A; Stoiljković, M M; Miletić, M; Pešić, D S
Vibrational structure of the B - X system of isotopic AgO molecules Journal Article
In: Spectroscopy Letters, vol. 32, no. 5, pp. 875-882, 1999.
@article{Bojović1999875,
title = {Vibrational structure of the B - X system of isotopic AgO molecules},
author = {V Bojović and A Antić-Jovanović and M M Stoiljković and M Miletić and D S Pešić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0005255240&doi=10.1080%2f00387019909350034&partnerID=40&md5=607f57b95cee7fe51ecfd9f83dcbe517},
doi = {10.1080/00387019909350034},
year = {1999},
date = {1999-01-01},
journal = {Spectroscopy Letters},
volume = {32},
number = {5},
pages = {875-882},
abstract = {Spectra of 107Ag18O and 107Ag16O molecules have been obtained in a low-pressure arc in oxygen atmosphere, and recorded with medium dispersion. Vibrational assignments for the bands of B2Π-X2Π system were verified by the study of the oxygen isotope effect, and the vibrational constants were obtained for the states involved in transitions. Copyright © 1999 by Marcel Dekker, Inc.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Obradović, M V; Mitić, S S; Sunarić, S M; Veselinović, D S
Reaction between oxalic acid and Na2HAsO4. A conductometric and pHmetric investigation Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 1, pp. 39-45, 1999.
@article{Obradović199939,
title = {Reaction between oxalic acid and Na2HAsO4. A conductometric and pHmetric investigation},
author = {M V Obradović and S S Mitić and S M Sunarić and D S Veselinović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033480494&partnerID=40&md5=ad1df636636d1bce4a3cb38a55eac202},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {1},
pages = {39-45},
abstract = {The reaction between Na2HAsO4 and oxalic acid was studied by pH-metric and conductometric measurements, applying the methods of continual variations. It was found that the oxalic acid forms a complex of the type [HAsO3C2C4]2 .The stability constants and thermodynamic parameters for the complex reaction were calculated using the data obtained by pH-metric measurements at 25±1 °C.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ražić, S; Todorović, M; Holclajtner-Antunović, I; Stoiljković, M
Determination of metal traces in wine by argon stabilized d.c. arc Journal Article
In: Fresenius' Journal of Analytical Chemistry, vol. 365, no. 4, pp. 367-370, 1999.
@article{Ražić1999367,
title = {Determination of metal traces in wine by argon stabilized d.c. arc},
author = {S Ražić and M Todorović and I Holclajtner-Antunović and M Stoiljković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-2542540941&doi=10.1007%2fs002160051502&partnerID=40&md5=93c206fe510e21db794c7cb1c0b4085a},
doi = {10.1007/s002160051502},
year = {1999},
date = {1999-01-01},
journal = {Fresenius' Journal of Analytical Chemistry},
volume = {365},
number = {4},
pages = {367-370},
abstract = {A spetroscopic method for the determination of metal traces (Mn, Cu, Fe) in wine has been developed based on argon stabilized d.c. arc plasma at atmospheric pressure. The experimental conditions were optimized using lateral distributions of spectral line intensities of the trace elements in aqueous and ethanol-aqueous solutions. The method was applied to the analysis of 6 wines from 3 Serbian wine-growing regions. Direct and standard addition methods were tested. The precision of the method is characterized by a relative standard deviation of 0.50-3.00%. The accuracy of the method was assessed by flame AAS. © Springer-Verlag 1999.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Okon, E B; Hranisavljevic, J; Vucelic, D; Kaminsky, Y G
Comparative and quantitative analysis of proteins in urine and peritoneal fluid fractioned with SDS-electrophoresis and stained with silver Journal Article
In: Voprosy Meditsinskoj Khimii, vol. 45, no. 2, pp. 169, 1999.
@article{Okon1999169,
title = {Comparative and quantitative analysis of proteins in urine and peritoneal fluid fractioned with SDS-electrophoresis and stained with silver},
author = {E B Okon and J Hranisavljevic and D Vucelic and Y G Kaminsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0346347890&partnerID=40&md5=d3dab32192685e5ab0f58f22bf927b87},
year = {1999},
date = {1999-01-01},
journal = {Voprosy Meditsinskoj Khimii},
volume = {45},
number = {2},
pages = {169},
abstract = {The method for the silver staining of proteins fractionated with SDS electrophoresis is described as a new approach for the complex analysis of biological fluids allowing to obtain the valuable diagnostic information and to determine quantitatively individual proteins in urine and peritoneal fluid, in particular in nephropathologies.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kremenovic, A; Norby, P; Dimitrijevic, R; Dondur, V
In: Phase Transitions, vol. 68, no. 4, pp. 587-605, 1999.
@article{Kremenovic1999587,
title = {High-temperature synchrotron powder diffraction investigation of thermal expansion, strain and microstructure for the co-elastic α ↔ β hexacelsian transition},
author = {A Kremenovic and P Norby and R Dimitrijevic and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032633514&doi=10.1080%2f01411599908224536&partnerID=40&md5=4e210be411f0e7cc6e7c3eb23626a1d0},
doi = {10.1080/01411599908224536},
year = {1999},
date = {1999-01-01},
journal = {Phase Transitions},
volume = {68},
number = {4},
pages = {587-605},
abstract = {High-temperature investigations of thermal expansion, strain and microstructure of the α ↔ β-hexacelsian reversible phase transition are reported. HexacelsianLTA and hexacelsianFAU were synthesised from LTA and FAU zeolites, respectively. Only the former show discontinuities near the transition temperature, approx. 580 K. The discontinuity in the thermal expansion near the transition temperature for the α ↔ β-hexacelsianLTA suggest a co-elastic character for the phase transition. A distortion of the co-ordination polyhedra and ordering of framework cations induce this phase transition. The absence of discontinuities for hexacelsianFAU suggests non-existence of a phase transition. The similarities in the measured and calculated values for β-hexacelsianLTA and hexacelsianFAU suggest that hexacelsianFAU crystallise exclusively as the β-form.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ristić, G S; Petkovska, L T; Bogdanov, Z D; Zec, S; Miljanić, S S
Conditioning of the filament for diamond deposition by hot-filament chemical vapour deposition method Journal Article
In: Journal of the Serbian Chemical Society, vol. 63, no. 3, pp. 231-235, 1998.
@article{Ristić1998231,
title = {Conditioning of the filament for diamond deposition by hot-filament chemical vapour deposition method},
author = {G S Ristić and L T Petkovska and Z D Bogdanov and S Zec and S S Miljanić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032351242&partnerID=40&md5=2b7783364ab067965a93d2bd46f73d6a},
year = {1998},
date = {1998-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {63},
number = {3},
pages = {231-235},
abstract = {A tungsten filament, 0.12 mm in diameter, was conditioned by heating in a mixture of methane and hydrogen of three different concentration ratios. The filament was heated by an electric current. The procedure was carried out stepwise keeping either the voltage or the temperature of the filament constant. Changes in the filament material were monitored by resistance and temperature measurements. The chemical composition was checked using X-ray diffraction (XRD) analysis. The final state of the filament was investigated and photographed using the scanning electron microscopy (SEM) technique.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Wengenack, N L; Todorovic, S; Yu, L; Rusnak, F
Evidence for differential binding of isoniazid by Mycobacterium tuberculosis KatG and the isoniazid-resistant mutant KatG(S315T) Journal Article
In: Biochemistry, vol. 37, no. 45, pp. 15825-15834, 1998.
@article{Wengenack199815825,
title = {Evidence for differential binding of isoniazid by Mycobacterium tuberculosis KatG and the isoniazid-resistant mutant KatG(S315T)},
author = {N L Wengenack and S Todorovic and L Yu and F Rusnak},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032506053&doi=10.1021%2fbi982023k&partnerID=40&md5=b5a9a884edeee43273056fef4377eb3b},
doi = {10.1021/bi982023k},
year = {1998},
date = {1998-01-01},
journal = {Biochemistry},
volume = {37},
number = {45},
pages = {15825-15834},
abstract = {Isoniazid is a mainstay of antibiotic therapy for the treatment of tuberculosis, but its molecular mechanism of action is unclear. Previous investigators have hypothesized that isoniazid is a prodrug that requires in vivo activation by KatG, the catalase - peroxidase of Mycobacterium tuberculosis, and that resistance to isoniazid strongly correlates with deletions or point mutations in KatG. One such mutation, KatG(S315T), is found in approximately 50% of clinical isolates exhibiting isoniazid resistance. In this work, 1H nuclear magnetic resonance T1 relaxation measurements indicate that KatG and KatG(S315T) each bind isoniazid at a position ≃ 12 Å from the active site heme iron. Electron paramagnetic resonance spectroscopy revealed heterogeneous populations of high-spin ferric heme in both wild-type KatG and KatG(S315T) with the ratios of each species differing between the two enzymes. Small changes in the proportions of these high-spin species upon addition of isoniazid support the finding that isoniazid binds near the heme periphery of both enzymes. Titration of wild- type KatG with isoniazid resulted in the appearance of a 'type I' substrate- induced difference spectrum analogous to those seen upon substrate binding to the cytochromes P450. The difference spectrum may result from an isoniazid-induced change in a portion of the KatG heme iron from 6- to 5- coordinate. Titration of KatG(S315T) with isoniazid failed to produce a measurable difference spectrum indicating an altered active site configuration. These results suggest that KatG(S315T) confers resistance to isoniazid through subtle changes in the isoniazid binding site.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Šašić, S; Antić-Jovanović, A; Jeremić, M
An investigation of the equilibrium of mercury(II) thiocyanate complexes in DMF solutions via Raman spectra and factor analysis Journal Article
In: Journal of the Chemical Society - Faraday Transactions, vol. 94, no. 21, pp. 3255-3260, 1998.
@article{Šašić19983255,
title = {An investigation of the equilibrium of mercury(II) thiocyanate complexes in DMF solutions via Raman spectra and factor analysis},
author = {S Šašić and A Antić-Jovanović and M Jeremić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33748728491&doi=10.1039%2fa805192e&partnerID=40&md5=4f34638e3b52097365eafd8e4dc43758},
doi = {10.1039/a805192e},
year = {1998},
date = {1998-01-01},
journal = {Journal of the Chemical Society - Faraday Transactions},
volume = {94},
number = {21},
pages = {3255-3260},
abstract = {Using Raman spectra and factor analysis, the equilibria of mercury(II) thiocyanate complexes in N,N-dimethylformamide solutions with SCN-/Hg(II) molar ratios ranging from 0.6 to 4.0 have been investigated. The spectra were recorded in the region of the ν(Hg-S) and ν(C-N) vibrations. In the former, the Raman bands belonging to four complex species, Hg(SCN)+, Hg(SCN)2, Hg(SCN)3- and Hg(SCN)42-, have been extracted by applying principal component analysis to the spectra. Three components were found in the ν(C-N) region. The concentration of the identified complex species in all investigated solutions has been determined by a target factor analysis method and the disproportionation constants of Hg(SCN)+ and Hg(SCN)3- have been estimated to be 0.18 and 0.21, respectively.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D; Begović, N; Žujović, Z; Vučelić, D; Bačić, G
1 H NMR monitoring of water behavior during the Bray-Liebhafsky oscillatory reaction Journal Article
In: Journal of Physical Chemistry A, vol. 102, no. 35, pp. X-6886, 1998.
@article{Stanisavljev1998,
title = {1 H NMR monitoring of water behavior during the Bray-Liebhafsky oscillatory reaction},
author = {D Stanisavljev and N Begović and Z Žujović and D Vučelić and G Bačić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-11744277583&partnerID=40&md5=8f4bb111999c0e74088d82a810616cb7},
year = {1998},
date = {1998-01-01},
journal = {Journal of Physical Chemistry A},
volume = {102},
number = {35},
pages = {X-6886},
abstract = {Proton NMR spectroscopy was used to monitor behavior of water during the oscillatiory part of the Bray-Liebhafsky (BL) reaction. A series of 1 H NMR spectra showed the complex structure of the water signal with periodic changes of the chemical shift and line splitting, which were in agreement with the periodicity of the BL reaction obtained by potentiometric measurements. An analysis of known intermediates in the BL reaction indicated that oxygen formation both as dissolved and in form of bubbles has the dominant effect on NMR spectra. In addition, certain restructuring of water was observed during oscillations, suggesting the subtle role of water in the mechanism of the BL reaction and pointing out to the importance of the NMR techniques in investigation of the chemical oscillators.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D; Begović, N; Vukojević, V
Influence of heavy water on the Bray-Liebhafsky oscillating reaction Journal Article
In: Journal of Physical Chemistry A, vol. 102, no. 35, pp. 6887-6891, 1998.
@article{Stanisavljev19986887,
title = {Influence of heavy water on the Bray-Liebhafsky oscillating reaction},
author = {D Stanisavljev and N Begović and V Vukojević},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0011225227&doi=10.1021%2fjp9808025&partnerID=40&md5=0a101944b16bcfc2f00e81279641a251},
doi = {10.1021/jp9808025},
year = {1998},
date = {1998-01-01},
journal = {Journal of Physical Chemistry A},
volume = {102},
number = {35},
pages = {6887-6891},
abstract = {The influence of heavy water on the Bray-Liebhafsky (BL) oscillating reaction was investigated for varying amounts of D2O, at three different temperatures. Evolution of the system was monitored potentiometrically. Simultaneous recordings of gaseous oxygen over the reaction solution were also performed. In separate experiments the iodine concentration was monitored spectrophotometrically. Replacement of H2O by D2O progressively intensifies the reactions of oxidation of the iodine species, compared to the reactions of their reduction. As a result there is a critical ratio of D2O/H2O, after which the dynamics of the system is considerably altered. The same effect is observed at all temperatures, but it is more pronounced at lower temperatures. Two possible explanations for the progressively intensified oxidation are discussed: the reverse isotope effect and the selective energy transfer. It is established that the oxidation and reduction of the iodine species in the BL reaction do not proceed through the same intermediates. The important role of bulk water in surmounting the high activation energy threshold of the oxidation branch is revealed in the experiments.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
1999
Milosavljević, V; Konjević, R; Djeniže, S
Temperature dependence of Stark width of the 463.054 nm NII spectral line Journal Article
In: Astronomy and Astrophysics Supplement Series, vol. 135, no. 3, pp. 565-569, 1999.
@article{Milosavljević1999565,
title = {Temperature dependence of Stark width of the 463.054 nm NII spectral line},
author = {V Milosavljević and R Konjević and S Djeniže},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000600938&doi=10.1051%2faas%3a1999189&partnerID=40&md5=bf3ab117c4d2815800506202e9180aff},
doi = {10.1051/aas:1999189},
year = {1999},
date = {1999-01-01},
journal = {Astronomy and Astrophysics Supplement Series},
volume = {135},
number = {3},
pages = {565-569},
abstract = {Stark width of the 463.054 nm singly ionized nitrogen spectral line, that belong to 3s - 3p transition, have been measured in a linear pulsed, low pressure, arc discharge. The working gas was helium-nitrogen-oxygen mixture. Electron densities of 0.751023 m-3 to 1.451023 m-3 were determined in the electron temperature range between 30000 K - 38000 K. The measured values have been compared with our calculated data, using the modified semiempirical approximation. On the basis of the agreement among experimental and theoretical Stark width data, the isolated 463.054 nm NII spectral line can be recommended as convenient spectral line for plasma diagnostics.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gizdavic, M; Adnadjevic, B
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 193-203, 1999.
@article{Gizdavic1999193,
title = {Semiquantitative X-ray structural method for determining phase composition of ultradisperse powders of Si 3 N 4 obtained by a plasmachemical procedure},
author = {M Gizdavic and B Adnadjevic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749312874&partnerID=40&md5=8ff1a94b8620e3b319d9a27b46c64455},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {193-203},
abstract = {Nine samples of ultradisperse powders of Si 3 N 4 were synthesized using a new plasmachemical procedure. An attempt was made to determine the phase composition of samples using the Cullity X-ray structural method. Discrepancy was established between the results of the Cullity phase analysis and the given physicochemical characteristics of Si 3 N 4 . Because of that, we developed a semiquantitative X-ray structural method for the determination of the phase content of the Si 3 N 4 samples. The semiquantitative X-ray structural method enables work with all maxima (hkl) which appear in the diffractogram, and doesn't require standard sample. The phase composition of investigated samples which was determined using this method is in accord with phase composition determined on the basis of chemical composition. © 1999 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gizdavic, M; Adnadjevic, B
Semiquantitative IR method for determining phase composition of ultradisperse powders of Si 3 N 4 + Journal Article
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 183-192, 1999.
@article{Gizdavic1999183,
title = {Semiquantitative IR method for determining phase composition of ultradisperse powders of Si 3 N 4 +},
author = {M Gizdavic and B Adnadjevic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33749277878&partnerID=40&md5=b0fb43f8a28891a1f04a10d0b2847570},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {183-192},
abstract = {An IR method was used for determining phase composition of nine samples of ultradisperse powders (UDP) of Si 3 N 4 which have been synthesized by plasmachemical procedure. In samples taken from the filter (α + β)Si 3 N 4 completely prevailed, while in samples taken from the plasma aggregate walls there was 33-42% of unreacted Si. The high correlation of the obtained results was established in relation to the phase analysis results of the examined samples obtained on the basis of X-ray structural analysis, and to physico-chemical characteristics of powders (specific surface (S), particle diameter (d) and chemical analysis). © 1999 Akadémiai Kiadó.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Baranac, J M; Petranović, N A; Dimitrić-Marković, J M
A spectrophotometric study of the reaction of copigmentation of malvin and tannic acid Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 10, pp. 599-608, 1999.
@article{Baranac1999599,
title = {A spectrophotometric study of the reaction of copigmentation of malvin and tannic acid},
author = {J M Baranac and N A Petranović and J M Dimitrić-Marković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033432409&partnerID=40&md5=2aa0b4158bf41e2747230431b0326c67},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {10},
pages = {599-608},
abstract = {The reaction of copigmentation of malvidin 3,5-diglucoside and tannic acid of the ester type was studied. The interactions of these molecules were observed via UV-VIS absorption spectroscopy. It was established that the pH of the medium, the concentration of the copigmentating molecules, and the temperature affect the copigmentation process. The calculated equilibrium constant of the reaction of pH 3.00 is K = 226.9, and at pH 3.65 it is K = 277.0. The change of the Gibbs free energy in pH 3.00 buffer is ΔG = -13.4 kJ/mol, and in pH 3.65 buffer it is ΔG = -13.9 kJ/mol. The stoichiometric ratio of the components in the copigment is 1:1, at both pH values. It is evident from the calculated values of the thermodynamic functions that the process is thermodynamically favorable in the lower temperature range. Temperature appears as the basic parameter of the thermodynamic feasability of the process, since the copigmentation process is exothermic (ΔH pH=3.00 = - 41.6 kJ/mol and ΔH pH=3.65 = - 41.6 kJ/mol) and proceeds with a decrease in entropy (ΔS pH=3.00 = - 94.4 J/mol K and ΔS pH=3.65 = -92.7 J/mol K).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Vukojević, V B; Pejić, N D; Stanisavljev, D R; Anić, S R; Kolar-Anić, L Z
In: Analyst, vol. 124, no. 2, pp. 147-152, 1999.
@article{Vukojević1999147,
title = {Determination of Cl - , Br - , I - , Mn 2+ , malonic acid and quercetin by perturbation of a non-equilibrium stationary state in the Bray-Liebhafsky reaction},
author = {V B Vukojević and N D Pejić and D R Stanisavljev and S R Anić and L Z Kolar-Anić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033002043&doi=10.1039%2fa807608a&partnerID=40&md5=bf1328af33543af0939ce9bcec884f0f},
doi = {10.1039/a807608a},
year = {1999},
date = {1999-01-01},
journal = {Analyst},
volume = {124},
number = {2},
pages = {147-152},
abstract = {A new method applying a non-linear chemical system under conditions far from thermodynamic equilibrium in microvolume/microconcentration quantitative analysis is described. The chemical system used as a matrix is the Bray-Liebhafsky reaction in a non-equilibrium stationary state close to a bifurcation point. The method is based on monitoring the response of this system to perturbations by Cl - , Br - , I - , Mn 2+ , malonic acid and quercetin analyte solutions, which are followed potentiometrically either by an Ag + /S 2- ion-sensitive or by a Pt electrode. A linear response of the potential shift versus the logarithm of the analyte concentrations is found in the following ranges: 1.3 X 10 -6 mol dm -3 ≤ [Cl - ] ≤ 1.6 x 10 -4 mol dm -3 , 1.0 x 10 -6 mol dm -3 ≤ [Br - ] ≤ 8.3 x 10 -5 mol dm -3 , 2.0 x 10 -6 mol dm -3 ≤ [I - ] ≤ 1.0 x 10 -4 mol dm -3 , 8.4 x 10 -7 mol dm -3 ≤ [Mn 2+ ] ≤ 8.3 x 10 -5 mol dm -3 , 3.8 x 10 -7 mol dm -3 ≤ [malonic acid] ≤ 2.1 x 10 -5 mol dm -3 and 1.5 x 10 -8 mol dm -3 ≤ [quercetin] ≤ 3.7 x 10 -5 mol dm -3 . Under the investigated conditions an improved detection limit for all halides tested is obtained. Unknown concentrations of the analytes can be determined from a standard series of calibration curves to an accuracy within ± 5%. In addition, the application of potentiometric measurements in microvolume/microconcentration quantitative analysis is diversified.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Šašić, S; Antić-Jovanović, A; Kuzmanović, M; Jeremić, M
Quantitative analysis of the Raman spectra of mixtures of weakly interacting components by factor analysis methods Journal Article
In: Analyst, vol. 124, no. 10, pp. 1481-1487, 1999.
@article{Šašić19991481,
title = {Quantitative analysis of the Raman spectra of mixtures of weakly interacting components by factor analysis methods},
author = {S Šašić and A Antić-Jovanović and M Kuzmanović and M Jeremić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032857150&doi=10.1039%2fa904633j&partnerID=40&md5=05d61db23a74084504dbe66e4b090e7c},
doi = {10.1039/a904633j},
year = {1999},
date = {1999-01-01},
journal = {Analyst},
volume = {124},
number = {10},
pages = {1481-1487},
abstract = {A system of 17 overlapped Raman spectra in the 250-350 cm -1 spectral region of the weakly interacting component mixture of 1,2-dichloroethane, dichloromethane and carbon tetrachloride has been subjected to the statistical methods of target factor analysis (TFA) and evolving factor analysis (EFA). The results have demonstrated that concentrations of substances with intense bands are successfully determined, however, there are difficulties in analyzing weak bands of one of the components, especially when applying a TFA technique. The results of such an analysis can be improved by minimal changes in one of the coordinates of a rotation vector. Comparison of these results with a synthetic spectral model suggests that problems with analysis of weak bands are caused by the presence of a strong band that greatly overlaps the weak one.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
PeriĆ, M; OstojiĆ, B
In: Molecular Physics, vol. 97, no. 6, pp. 743-751, 1999.
@article{PeriĆ1999743,
title = {Theoretical investigation of the Renner-Teller effect in Δ electronic states of tetra-atomic molecules. 2. Perturbative calculation of the vibronic spectrum in the 11Δg state of B2H2 from the linear molecule standpoint},
author = {M PeriĆ and B OstojiĆ},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0000994839&doi=10.1080%2f00268979909482874&partnerID=40&md5=514f026fc43e507ff469c8495e02ee47},
doi = {10.1080/00268979909482874},
year = {1999},
date = {1999-01-01},
journal = {Molecular Physics},
volume = {97},
number = {6},
pages = {743-751},
abstract = {Second-order perturbative formulae for handling the Renner-Teller effect in Δ electronic states of symmetric tetra-atomic molecules with linear equilibrium geometry are derived. They are applied to calculate vibronic energy levels of the 11Δg state of B2H2. Perturbative parameters are derived by fitting the ab initio computed potential energy surfaces. The results of the calculations are compared with those obtained by means of a variational approach. © 1999 Taylor & Francis Group, LLC.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Holclajtner-Antunović, I; Ražić, S; Todorović, M; Stoiljković, M
The influence of ethanol addition on excitation of aluminium in the argon stabilized d.c. arc Journal Article
In: ACH - Models in Chemistry, vol. 136, no. 1-2, pp. 83-93, 1999.
@article{Holclajtner-Antunović199983,
title = {The influence of ethanol addition on excitation of aluminium in the argon stabilized d.c. arc},
author = {I Holclajtner-Antunović and S Ražić and M Todorović and M Stoiljković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0012842139&partnerID=40&md5=d4a70fea9deb0c81a57f5e559ebd0f13},
year = {1999},
date = {1999-01-01},
journal = {ACH - Models in Chemistry},
volume = {136},
number = {1-2},
pages = {83-93},
abstract = {The effect of ethanol addition on the spectral line intensities of aluminium and excitation conditions in an argon stabilized d.c. arc was investigated. In order to find optimal conditions for trace elements determination, some experimental parameters, important for analytical capabilities of this plasma source, such as current intensity, spectroscopic buffer concentration and concentration of ethanol in aqueous-ethanol mixtures, were determined. The influence of ethanol addition on the nebulization efficiency and physical properties of the mixtures analyzed was examined too. The increase in intensity of Al atomic line in the presence of ethanol in concentration up to 20%, can be partly explained by higher nebulization efficiency. The other reason lies in the changes in the excitation and ionization processes, which was confirmed by the measurements of excitation temperature and electron number density. © 1999 Akadémiai Kiadó,.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Vujisić, B; Antić-Jovanović, A; Bojović, V; Pešić, D S; Pophristić, M
New rotational analysis of the B2Σ+-X2Σ+ bands in 69Ga16O and 71Ga16O Journal Article
In: Journal of Molecular Spectroscopy, vol. 193, no. 2, pp. 389-395, 1999.
@article{Vujisić1999389,
title = {New rotational analysis of the B2Σ+-X2Σ+ bands in 69Ga16O and 71Ga16O},
author = {B Vujisić and A Antić-Jovanović and V Bojović and D S Pešić and M Pophristić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-1242278740&doi=10.1006%2fjmsp.1998.7751&partnerID=40&md5=6c11a39b62140e3d8c6c287123e482cf},
doi = {10.1006/jmsp.1998.7751},
year = {1999},
date = {1999-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {193},
number = {2},
pages = {389-395},
abstract = {In the emission spectrum of the Ga16O molecule, the 0-0 and 1-0 bands of the B-X system have been rephotographed by means of conventional high-resolution spectroscopy. Clear resolution on the rotational structure near the band origins made it possible to perform reanalysis of the bands and derive new molecular constants characterizing 69Ga16O and 71Ga16O in the B2Σ+ and X2Σ+ states. © 1999 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Adamović, I; Parac, M; Hanrath, M; Perić, M
Ab initio study of the electronic spectrum of BeO Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 12, pp. 721-735, 1999.
@article{Adamović1999721,
title = {Ab initio study of the electronic spectrum of BeO},
author = {I Adamović and M Parac and M Hanrath and M Perić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033261237&partnerID=40&md5=28df283ef3206afcf0252eaaa55d0afe},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {12},
pages = {721-735},
abstract = {Low-lying singlet and triplet electronic states of the BeO molecule are calculated by means of the quantum chemical ab initio method. It was found that all states in the energy range from 0 to 50000 cm -1 are of valence character. Particular attention was paid to the investigation of the dissociative behavior of the states considered. The vibrational structure of the A 1 Π←Χ 1 Σ and B 1 Σ + ←X 1 Σ + spectral systems was calculated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Bojović, V; Antić-Jovanović, A; Stoiljković, M M; Miletić, M; Pešić, D S
Vibrational structure of the B - X system of isotopic AgO molecules Journal Article
In: Spectroscopy Letters, vol. 32, no. 5, pp. 875-882, 1999.
@article{Bojović1999875,
title = {Vibrational structure of the B - X system of isotopic AgO molecules},
author = {V Bojović and A Antić-Jovanović and M M Stoiljković and M Miletić and D S Pešić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0005255240&doi=10.1080%2f00387019909350034&partnerID=40&md5=607f57b95cee7fe51ecfd9f83dcbe517},
doi = {10.1080/00387019909350034},
year = {1999},
date = {1999-01-01},
journal = {Spectroscopy Letters},
volume = {32},
number = {5},
pages = {875-882},
abstract = {Spectra of 107Ag18O and 107Ag16O molecules have been obtained in a low-pressure arc in oxygen atmosphere, and recorded with medium dispersion. Vibrational assignments for the bands of B2Π-X2Π system were verified by the study of the oxygen isotope effect, and the vibrational constants were obtained for the states involved in transitions. Copyright © 1999 by Marcel Dekker, Inc.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Obradović, M V; Mitić, S S; Sunarić, S M; Veselinović, D S
Reaction between oxalic acid and Na2HAsO4. A conductometric and pHmetric investigation Journal Article
In: Journal of the Serbian Chemical Society, vol. 64, no. 1, pp. 39-45, 1999.
@article{Obradović199939,
title = {Reaction between oxalic acid and Na2HAsO4. A conductometric and pHmetric investigation},
author = {M V Obradović and S S Mitić and S M Sunarić and D S Veselinović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0033480494&partnerID=40&md5=ad1df636636d1bce4a3cb38a55eac202},
year = {1999},
date = {1999-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {64},
number = {1},
pages = {39-45},
abstract = {The reaction between Na2HAsO4 and oxalic acid was studied by pH-metric and conductometric measurements, applying the methods of continual variations. It was found that the oxalic acid forms a complex of the type [HAsO3C2C4]2 .The stability constants and thermodynamic parameters for the complex reaction were calculated using the data obtained by pH-metric measurements at 25±1 °C.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ražić, S; Todorović, M; Holclajtner-Antunović, I; Stoiljković, M
Determination of metal traces in wine by argon stabilized d.c. arc Journal Article
In: Fresenius' Journal of Analytical Chemistry, vol. 365, no. 4, pp. 367-370, 1999.
@article{Ražić1999367,
title = {Determination of metal traces in wine by argon stabilized d.c. arc},
author = {S Ražić and M Todorović and I Holclajtner-Antunović and M Stoiljković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-2542540941&doi=10.1007%2fs002160051502&partnerID=40&md5=93c206fe510e21db794c7cb1c0b4085a},
doi = {10.1007/s002160051502},
year = {1999},
date = {1999-01-01},
journal = {Fresenius' Journal of Analytical Chemistry},
volume = {365},
number = {4},
pages = {367-370},
abstract = {A spetroscopic method for the determination of metal traces (Mn, Cu, Fe) in wine has been developed based on argon stabilized d.c. arc plasma at atmospheric pressure. The experimental conditions were optimized using lateral distributions of spectral line intensities of the trace elements in aqueous and ethanol-aqueous solutions. The method was applied to the analysis of 6 wines from 3 Serbian wine-growing regions. Direct and standard addition methods were tested. The precision of the method is characterized by a relative standard deviation of 0.50-3.00%. The accuracy of the method was assessed by flame AAS. © Springer-Verlag 1999.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Okon, E B; Hranisavljevic, J; Vucelic, D; Kaminsky, Y G
Comparative and quantitative analysis of proteins in urine and peritoneal fluid fractioned with SDS-electrophoresis and stained with silver Journal Article
In: Voprosy Meditsinskoj Khimii, vol. 45, no. 2, pp. 169, 1999.
@article{Okon1999169,
title = {Comparative and quantitative analysis of proteins in urine and peritoneal fluid fractioned with SDS-electrophoresis and stained with silver},
author = {E B Okon and J Hranisavljevic and D Vucelic and Y G Kaminsky},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0346347890&partnerID=40&md5=d3dab32192685e5ab0f58f22bf927b87},
year = {1999},
date = {1999-01-01},
journal = {Voprosy Meditsinskoj Khimii},
volume = {45},
number = {2},
pages = {169},
abstract = {The method for the silver staining of proteins fractionated with SDS electrophoresis is described as a new approach for the complex analysis of biological fluids allowing to obtain the valuable diagnostic information and to determine quantitatively individual proteins in urine and peritoneal fluid, in particular in nephropathologies.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Kremenovic, A; Norby, P; Dimitrijevic, R; Dondur, V
In: Phase Transitions, vol. 68, no. 4, pp. 587-605, 1999.
@article{Kremenovic1999587,
title = {High-temperature synchrotron powder diffraction investigation of thermal expansion, strain and microstructure for the co-elastic α ↔ β hexacelsian transition},
author = {A Kremenovic and P Norby and R Dimitrijevic and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032633514&doi=10.1080%2f01411599908224536&partnerID=40&md5=4e210be411f0e7cc6e7c3eb23626a1d0},
doi = {10.1080/01411599908224536},
year = {1999},
date = {1999-01-01},
journal = {Phase Transitions},
volume = {68},
number = {4},
pages = {587-605},
abstract = {High-temperature investigations of thermal expansion, strain and microstructure of the α ↔ β-hexacelsian reversible phase transition are reported. HexacelsianLTA and hexacelsianFAU were synthesised from LTA and FAU zeolites, respectively. Only the former show discontinuities near the transition temperature, approx. 580 K. The discontinuity in the thermal expansion near the transition temperature for the α ↔ β-hexacelsianLTA suggest a co-elastic character for the phase transition. A distortion of the co-ordination polyhedra and ordering of framework cations induce this phase transition. The absence of discontinuities for hexacelsianFAU suggests non-existence of a phase transition. The similarities in the measured and calculated values for β-hexacelsianLTA and hexacelsianFAU suggest that hexacelsianFAU crystallise exclusively as the β-form.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
1998
Ristić, G S; Petkovska, L T; Bogdanov, Z D; Zec, S; Miljanić, S S
Conditioning of the filament for diamond deposition by hot-filament chemical vapour deposition method Journal Article
In: Journal of the Serbian Chemical Society, vol. 63, no. 3, pp. 231-235, 1998.
@article{Ristić1998231,
title = {Conditioning of the filament for diamond deposition by hot-filament chemical vapour deposition method},
author = {G S Ristić and L T Petkovska and Z D Bogdanov and S Zec and S S Miljanić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032351242&partnerID=40&md5=2b7783364ab067965a93d2bd46f73d6a},
year = {1998},
date = {1998-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {63},
number = {3},
pages = {231-235},
abstract = {A tungsten filament, 0.12 mm in diameter, was conditioned by heating in a mixture of methane and hydrogen of three different concentration ratios. The filament was heated by an electric current. The procedure was carried out stepwise keeping either the voltage or the temperature of the filament constant. Changes in the filament material were monitored by resistance and temperature measurements. The chemical composition was checked using X-ray diffraction (XRD) analysis. The final state of the filament was investigated and photographed using the scanning electron microscopy (SEM) technique.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Wengenack, N L; Todorovic, S; Yu, L; Rusnak, F
Evidence for differential binding of isoniazid by Mycobacterium tuberculosis KatG and the isoniazid-resistant mutant KatG(S315T) Journal Article
In: Biochemistry, vol. 37, no. 45, pp. 15825-15834, 1998.
@article{Wengenack199815825,
title = {Evidence for differential binding of isoniazid by Mycobacterium tuberculosis KatG and the isoniazid-resistant mutant KatG(S315T)},
author = {N L Wengenack and S Todorovic and L Yu and F Rusnak},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0032506053&doi=10.1021%2fbi982023k&partnerID=40&md5=b5a9a884edeee43273056fef4377eb3b},
doi = {10.1021/bi982023k},
year = {1998},
date = {1998-01-01},
journal = {Biochemistry},
volume = {37},
number = {45},
pages = {15825-15834},
abstract = {Isoniazid is a mainstay of antibiotic therapy for the treatment of tuberculosis, but its molecular mechanism of action is unclear. Previous investigators have hypothesized that isoniazid is a prodrug that requires in vivo activation by KatG, the catalase - peroxidase of Mycobacterium tuberculosis, and that resistance to isoniazid strongly correlates with deletions or point mutations in KatG. One such mutation, KatG(S315T), is found in approximately 50% of clinical isolates exhibiting isoniazid resistance. In this work, 1H nuclear magnetic resonance T1 relaxation measurements indicate that KatG and KatG(S315T) each bind isoniazid at a position ≃ 12 Å from the active site heme iron. Electron paramagnetic resonance spectroscopy revealed heterogeneous populations of high-spin ferric heme in both wild-type KatG and KatG(S315T) with the ratios of each species differing between the two enzymes. Small changes in the proportions of these high-spin species upon addition of isoniazid support the finding that isoniazid binds near the heme periphery of both enzymes. Titration of wild- type KatG with isoniazid resulted in the appearance of a 'type I' substrate- induced difference spectrum analogous to those seen upon substrate binding to the cytochromes P450. The difference spectrum may result from an isoniazid-induced change in a portion of the KatG heme iron from 6- to 5- coordinate. Titration of KatG(S315T) with isoniazid failed to produce a measurable difference spectrum indicating an altered active site configuration. These results suggest that KatG(S315T) confers resistance to isoniazid through subtle changes in the isoniazid binding site.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Šašić, S; Antić-Jovanović, A; Jeremić, M
An investigation of the equilibrium of mercury(II) thiocyanate complexes in DMF solutions via Raman spectra and factor analysis Journal Article
In: Journal of the Chemical Society - Faraday Transactions, vol. 94, no. 21, pp. 3255-3260, 1998.
@article{Šašić19983255,
title = {An investigation of the equilibrium of mercury(II) thiocyanate complexes in DMF solutions via Raman spectra and factor analysis},
author = {S Šašić and A Antić-Jovanović and M Jeremić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33748728491&doi=10.1039%2fa805192e&partnerID=40&md5=4f34638e3b52097365eafd8e4dc43758},
doi = {10.1039/a805192e},
year = {1998},
date = {1998-01-01},
journal = {Journal of the Chemical Society - Faraday Transactions},
volume = {94},
number = {21},
pages = {3255-3260},
abstract = {Using Raman spectra and factor analysis, the equilibria of mercury(II) thiocyanate complexes in N,N-dimethylformamide solutions with SCN-/Hg(II) molar ratios ranging from 0.6 to 4.0 have been investigated. The spectra were recorded in the region of the ν(Hg-S) and ν(C-N) vibrations. In the former, the Raman bands belonging to four complex species, Hg(SCN)+, Hg(SCN)2, Hg(SCN)3- and Hg(SCN)42-, have been extracted by applying principal component analysis to the spectra. Three components were found in the ν(C-N) region. The concentration of the identified complex species in all investigated solutions has been determined by a target factor analysis method and the disproportionation constants of Hg(SCN)+ and Hg(SCN)3- have been estimated to be 0.18 and 0.21, respectively.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D; Begović, N; Žujović, Z; Vučelić, D; Bačić, G
1 H NMR monitoring of water behavior during the Bray-Liebhafsky oscillatory reaction Journal Article
In: Journal of Physical Chemistry A, vol. 102, no. 35, pp. X-6886, 1998.
@article{Stanisavljev1998,
title = {1 H NMR monitoring of water behavior during the Bray-Liebhafsky oscillatory reaction},
author = {D Stanisavljev and N Begović and Z Žujović and D Vučelić and G Bačić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-11744277583&partnerID=40&md5=8f4bb111999c0e74088d82a810616cb7},
year = {1998},
date = {1998-01-01},
journal = {Journal of Physical Chemistry A},
volume = {102},
number = {35},
pages = {X-6886},
abstract = {Proton NMR spectroscopy was used to monitor behavior of water during the oscillatiory part of the Bray-Liebhafsky (BL) reaction. A series of 1 H NMR spectra showed the complex structure of the water signal with periodic changes of the chemical shift and line splitting, which were in agreement with the periodicity of the BL reaction obtained by potentiometric measurements. An analysis of known intermediates in the BL reaction indicated that oxygen formation both as dissolved and in form of bubbles has the dominant effect on NMR spectra. In addition, certain restructuring of water was observed during oscillations, suggesting the subtle role of water in the mechanism of the BL reaction and pointing out to the importance of the NMR techniques in investigation of the chemical oscillators.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Stanisavljev, D; Begović, N; Vukojević, V
Influence of heavy water on the Bray-Liebhafsky oscillating reaction Journal Article
In: Journal of Physical Chemistry A, vol. 102, no. 35, pp. 6887-6891, 1998.
@article{Stanisavljev19986887,
title = {Influence of heavy water on the Bray-Liebhafsky oscillating reaction},
author = {D Stanisavljev and N Begović and V Vukojević},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0011225227&doi=10.1021%2fjp9808025&partnerID=40&md5=0a101944b16bcfc2f00e81279641a251},
doi = {10.1021/jp9808025},
year = {1998},
date = {1998-01-01},
journal = {Journal of Physical Chemistry A},
volume = {102},
number = {35},
pages = {6887-6891},
abstract = {The influence of heavy water on the Bray-Liebhafsky (BL) oscillating reaction was investigated for varying amounts of D2O, at three different temperatures. Evolution of the system was monitored potentiometrically. Simultaneous recordings of gaseous oxygen over the reaction solution were also performed. In separate experiments the iodine concentration was monitored spectrophotometrically. Replacement of H2O by D2O progressively intensifies the reactions of oxidation of the iodine species, compared to the reactions of their reduction. As a result there is a critical ratio of D2O/H2O, after which the dynamics of the system is considerably altered. The same effect is observed at all temperatures, but it is more pronounced at lower temperatures. Two possible explanations for the progressively intensified oxidation are discussed: the reverse isotope effect and the selective energy transfer. It is established that the oxidation and reduction of the iodine species in the BL reaction do not proceed through the same intermediates. The important role of bulk water in surmounting the high activation energy threshold of the oxidation branch is revealed in the experiments.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}