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FFH scientific research papers database
FFH database search (1991-2022):
1621.
Simić, S M; Devečerski, A B
Thermochemical behavior of C 60 . Kinetics of decomposition in different atmospheres Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 7, pp. 615-618, 1997.
@article{Simić1997615,
title = {Thermochemical behavior of C 60 . Kinetics of decomposition in different atmospheres},
author = {S M Simić and A B Devečerski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0041165395&partnerID=40&md5=18afecb9861312cf89bf4ab1a27d4d5f},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {7},
pages = {615-618},
abstract = {The processes of decomposition of C 60 in different atmospheres were investigated by TG and DTG methods. It was observed that the temperature maxima on the DTG curves are shifted towards higher temperatures by about 200 K in an inert nitrogen atmosphere compared to the values in air. Kinetic parameters were calculated by methods evaluated for processes under nonisothermal conditions. In air, where oxidation takes place, the values of the activation energy depending on the method used, are: E a =145 ± 6 kJ/mol (Freeman-Carroll), E a = 138 ± 16 kJ/mol (Ozawa), E a = 121 ± 14 kJ/mol (Kissinger). In nitrogen, where sublimation occurs, the values of the activation energy are: E a = 130 ± 8 kJ/mol (Freeman-Carroll). E a =157 ± 16 kJ/mol (Ozawa), E a = 141 ± 14 kJ/mol (Kissinger).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The processes of decomposition of C 60 in different atmospheres were investigated by TG and DTG methods. It was observed that the temperature maxima on the DTG curves are shifted towards higher temperatures by about 200 K in an inert nitrogen atmosphere compared to the values in air. Kinetic parameters were calculated by methods evaluated for processes under nonisothermal conditions. In air, where oxidation takes place, the values of the activation energy depending on the method used, are: E a =145 ± 6 kJ/mol (Freeman-Carroll), E a = 138 ± 16 kJ/mol (Ozawa), E a = 121 ± 14 kJ/mol (Kissinger). In nitrogen, where sublimation occurs, the values of the activation energy are: E a = 130 ± 8 kJ/mol (Freeman-Carroll). E a =157 ± 16 kJ/mol (Ozawa), E a = 141 ± 14 kJ/mol (Kissinger).
1622.
Perić, M; Ostojić, B
Quantum chemical calculation of the electronic spectrum of the B 2 H 2 radical. Comparison with spectra of related species Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 9, pp. 817-835, 1997.
@article{Perić1997817,
title = {Quantum chemical calculation of the electronic spectrum of the B 2 H 2 radical. Comparison with spectra of related species},
author = {M Perić and B Ostojić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031508974&partnerID=40&md5=58a41d2127c9f7b92453b3cf96a896e2},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {9},
pages = {817-835},
abstract = {The singlet and triplet electronic states of the B 2 H 2 radical are calculated by means of the quantum chemical ab initio method. The spectrum is compared with those of related molecular and atomic species. It is found that there is a great similarity between the global structures of the spectra of B 2 H 2 and O 2 . The nature of the binding in B 2 H 2 is discussed in terms of the composition of the molecular orbitals and the molecular geometry dependence of their energy.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The singlet and triplet electronic states of the B 2 H 2 radical are calculated by means of the quantum chemical ab initio method. The spectrum is compared with those of related molecular and atomic species. It is found that there is a great similarity between the global structures of the spectra of B 2 H 2 and O 2 . The nature of the binding in B 2 H 2 is discussed in terms of the composition of the molecular orbitals and the molecular geometry dependence of their energy.
1623.
Sabo, T J; Vlajković, J; Dondur, V
The mechanisms of tris(4-morpholinecarbodithioato-S,S′)cobalt(III) complex formation by solid state reaction from ammine cobalt(III) complexes Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 11, pp. 1037-1044, 1997.
@article{Sabo19971037,
title = {The mechanisms of tris(4-morpholinecarbodithioato-S,S′)cobalt(III) complex formation by solid state reaction from ammine cobalt(III) complexes},
author = {T J Sabo and J Vlajković and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031521179&partnerID=40&md5=6430bb353708351792540d9f0c0a73bd},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {11},
pages = {1037-1044},
abstract = {In this paper, the solid state reaction, conducted with a mixture of pentaamminechlorocobalt(III) chloride and potassium 4-morpholinecarbodithioate was investigated under isothermal conditions. The reaction proceeds at relatively low temperatures (154-192 °C). The yield of product solid-solid reaction, tris(4-morpholinecarbodithioato-S,S')cobalt(III) complex, does not exceed 65%. The kinetic of the reaction of powdered and pressed samples were investigated. The reaction proceeded according to the diffusional mechanism. Activation energies of 200 kJ/mol and 100 kJ/mol for the powdered and pressed form, respectively, were obtained.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, the solid state reaction, conducted with a mixture of pentaamminechlorocobalt(III) chloride and potassium 4-morpholinecarbodithioate was investigated under isothermal conditions. The reaction proceeds at relatively low temperatures (154-192 °C). The yield of product solid-solid reaction, tris(4-morpholinecarbodithioato-S,S')cobalt(III) complex, does not exceed 65%. The kinetic of the reaction of powdered and pressed samples were investigated. The reaction proceeded according to the diffusional mechanism. Activation energies of 200 kJ/mol and 100 kJ/mol for the powdered and pressed form, respectively, were obtained.
1624.
Holclajtner-Antunović, I; Raspopović, Z; Georgijević, V; Tripković, M
Computer Simulation of Added Li Influence on the ICP Properties Journal Article
In: Plasma Chemistry and Plasma Processing, vol. 17, no. 3, pp. 331-352, 1997.
@article{Holclajtner-Antunović1997331,
title = {Computer Simulation of Added Li Influence on the ICP Properties},
author = {I Holclajtner-Antunović and Z Raspopović and V Georgijević and M Tripković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031517702&doi=10.1007%2fBF02766839&partnerID=40&md5=93341170cd8ee3c6d11820da1cb10751},
doi = {10.1007/BF02766839},
year = {1997},
date = {1997-01-01},
journal = {Plasma Chemistry and Plasma Processing},
volume = {17},
number = {3},
pages = {331-352},
abstract = {The influence of added Li on the ICP characteristics is investigated by computer simulation. The transport and the thermodynamic parameters of Li in the temperature interval between 300 and 13,000 K are taken from the literature, while in the case of absence of those, the data were estimated. The HiFI computer program was used for calculation of spatial distributions of temperature, velocity, and electromagnetic fields for argon plasma with the presence of different quantities of Li up to 30%. On the basis of calculated temperature field and equilibrium plasma composition the spatial distribution of electron density was determined. It was found that the addition of Li considerably influences the spatial distributions of all analyzed plasma parameters at Li concentrations higher than 1%. It is shown that the electron density is the most sensible among all analyzed parameters of the presence of Li.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The influence of added Li on the ICP characteristics is investigated by computer simulation. The transport and the thermodynamic parameters of Li in the temperature interval between 300 and 13,000 K are taken from the literature, while in the case of absence of those, the data were estimated. The HiFI computer program was used for calculation of spatial distributions of temperature, velocity, and electromagnetic fields for argon plasma with the presence of different quantities of Li up to 30%. On the basis of calculated temperature field and equilibrium plasma composition the spatial distribution of electron density was determined. It was found that the addition of Li considerably influences the spatial distributions of all analyzed plasma parameters at Li concentrations higher than 1%. It is shown that the electron density is the most sensible among all analyzed parameters of the presence of Li.
1625.
Šušić, M V
Hydriding and dehydriding of palladium-doped charcoal Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 8, pp. 631-634, 1997.
@article{Šušić1997631,
title = {Hydriding and dehydriding of palladium-doped charcoal},
author = {M V Šušić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040681824&partnerID=40&md5=883b143fc45a03250148ec164467cff6},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {8},
pages = {631-634},
abstract = {The hydrogen absorption capability of wood charcoal doped with 0.0049% of palladium was examined by differential scanning calorimet-y. Hydriding and subsequent dehydriding (oxidation) indicate that the absorbent, due to the spill-over effect, absorbs substantial quantities of hydrogen at atmospheric pressure.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The hydrogen absorption capability of wood charcoal doped with 0.0049% of palladium was examined by differential scanning calorimet-y. Hydriding and subsequent dehydriding (oxidation) indicate that the absorbent, due to the spill-over effect, absorbs substantial quantities of hydrogen at atmospheric pressure.
1626.
Šušić, M V
Hydriding and dehydriding of palladium-doped carbonyl nickel and of the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 11, pp. 1137-1141, 1997.
@article{Šušić19971137,
title = {Hydriding and dehydriding of palladium-doped carbonyl nickel and of the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45},
author = {M V Šušić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040088067&partnerID=40&md5=fecfa5c2b9231b23c5b19978ee96cb52},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {11},
pages = {1137-1141},
abstract = {Carbonyl nickel and the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 were doped with 0.0027 to 0.013 wt.% of palladium. Heating in a hydrogen stream produces hydrides with 28 to 45 hydrogen atoms per atom (molecule) of the substances.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carbonyl nickel and the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 were doped with 0.0027 to 0.013 wt.% of palladium. Heating in a hydrogen stream produces hydrides with 28 to 45 hydrogen atoms per atom (molecule) of the substances.
1627.
Vujaković, A; Tomašević-Čanović, M; Dondur, V
Interaction of dodecylamine with montmorillonite. Part I. Adsorption mechanism Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 7, pp. 599-605, 1997.
@article{Vujaković1997599,
title = {Interaction of dodecylamine with montmorillonite. Part I. Adsorption mechanism},
author = {A Vujaković and M Tomašević-Čanović and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039386097&partnerID=40&md5=95a92c4b5a346f24ee993077a427a075},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {7},
pages = {599-605},
abstract = {It was observed that dodecylamine adsorption on Na-montmorillonite occurred as the cation exchange of Na + ion by dodecylammonium ion, up to the dodecylamine addition of 70 mmol/z·100g clay. The results of particle size distribution analysis showed that increasing concentration of adsorbed dodecylamine was followed by increasing particle size in suspension. IR spectra of organoclay complexes showed the bands in the range 1490-1465 cm -1 corresponding to dodecylammonium ion chemisorbed on the silicate surfaces of montmorillonite.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
It was observed that dodecylamine adsorption on Na-montmorillonite occurred as the cation exchange of Na + ion by dodecylammonium ion, up to the dodecylamine addition of 70 mmol/z·100g clay. The results of particle size distribution analysis showed that increasing concentration of adsorbed dodecylamine was followed by increasing particle size in suspension. IR spectra of organoclay complexes showed the bands in the range 1490-1465 cm -1 corresponding to dodecylammonium ion chemisorbed on the silicate surfaces of montmorillonite.
1628.
Minić, D; Šušić, M; Tešić, Z; Dimitrijević, R
Investigation of the thermal behaviour of Ag-Pd intermetallic compounds in hydrogen atmosphere Journal Article
In: Studies in Surface Science and Catalysis, vol. 112, pp. 447-456, 1997.
@article{Minić1997447,
title = {Investigation of the thermal behaviour of Ag-Pd intermetallic compounds in hydrogen atmosphere},
author = {D Minić and M Šušić and Z Tešić and R Dimitrijević},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33750410785&partnerID=40&md5=5220cfd61027526e0652515593942b3a},
year = {1997},
date = {1997-01-01},
journal = {Studies in Surface Science and Catalysis},
volume = {112},
pages = {447-456},
abstract = {It was shown by differential scanning calorimetry and X-ray diffraction that chemically prepared Ag-Pd intermetallic compounds of different composition in powder form are active hydrogen absorbers in the temperature range 20-300°C. During thermal treatment in vacuum transition into crystalline state takes place. The process of hydrogen absorption was analysed and thermodynamic and kinetic parameters of this process determined. © 1997 Elsevier Science B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
It was shown by differential scanning calorimetry and X-ray diffraction that chemically prepared Ag-Pd intermetallic compounds of different composition in powder form are active hydrogen absorbers in the temperature range 20-300°C. During thermal treatment in vacuum transition into crystalline state takes place. The process of hydrogen absorption was analysed and thermodynamic and kinetic parameters of this process determined. © 1997 Elsevier Science B.V. All rights reserved.
1629.
Mijović, S; Mitrović, M; Vučelić, D
Laboratory process for ethanol drying in a fixed bed of the zeolite 3A Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 4, pp. 353-359, 1997.
@article{Mijović1997353,
title = {Laboratory process for ethanol drying in a fixed bed of the zeolite 3A},
author = {S Mijović and M Mitrović and D Vučelić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0042230023&partnerID=40&md5=30db5bbdd0bd4dea56e261a8ad23cb37},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {4},
pages = {353-359},
abstract = {The conditions for the process of a liquid phase dehydration of ethanol were investigated. The dehydration was performed in a fixed bed adsorption column of granullar molecular sieve 3A, which was confirmed, as it is already known, to be the most efficient dessicant for organic solvents. The dynamic capacity of the adsorbent, as well as the cross-over ratio between the mass transfer zone (MTZ) and the heat wave developed during the adsorption step, were determined. The results of the experiments form the basis for the design of an industrial process to produce absolute ethanol, using a temperature swing adsorption (TSA) cycle.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The conditions for the process of a liquid phase dehydration of ethanol were investigated. The dehydration was performed in a fixed bed adsorption column of granullar molecular sieve 3A, which was confirmed, as it is already known, to be the most efficient dessicant for organic solvents. The dynamic capacity of the adsorbent, as well as the cross-over ratio between the mass transfer zone (MTZ) and the heat wave developed during the adsorption step, were determined. The results of the experiments form the basis for the design of an industrial process to produce absolute ethanol, using a temperature swing adsorption (TSA) cycle.
1630.
Dojčinović, M; Adnadjević, B; Andrejić, N
Influence of Zn2+ ions in a ZSM-5 catalyst on the C3-C4 hydrocarbons aromatization process Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 2, pp. 131-135, 1997.
@article{Dojčinović1997131,
title = {Influence of Zn2+ ions in a ZSM-5 catalyst on the C3-C4 hydrocarbons aromatization process},
author = {M Dojčinović and B Adnadjević and N Andrejić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039500681&partnerID=40&md5=c79c689c10e85f5619e2a57259e942e8},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {2},
pages = {131-135},
abstract = {Catalysts, based on zeolite ZSM-5 modified by Zn2+ ions, are suitable for aromatization of C3-C4 hydrocarbons. Zn2+ ions change the acidity of the catalysts by blocking the strong Brönsted acid centers. The most probable aromatization mechanism is presented. The catalyst, based on a zeolite ZSM-5, with a module 50 and with a Zn content of 2.4%, was laboratory produced and applied to the aromatisation of a propane-butane mixture. In the temperature interval of 673-873 K propane was not converted, so it was supposed that the catalyst has Brönstcd acid centers of medium strength, as well as Lewis acid centers, since the concentration of Zn2+ ions, concerning the zeolite module, was rather high.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Catalysts, based on zeolite ZSM-5 modified by Zn2+ ions, are suitable for aromatization of C3-C4 hydrocarbons. Zn2+ ions change the acidity of the catalysts by blocking the strong Brönsted acid centers. The most probable aromatization mechanism is presented. The catalyst, based on a zeolite ZSM-5, with a module 50 and with a Zn content of 2.4%, was laboratory produced and applied to the aromatisation of a propane-butane mixture. In the temperature interval of 673-873 K propane was not converted, so it was supposed that the catalyst has Brönstcd acid centers of medium strength, as well as Lewis acid centers, since the concentration of Zn2+ ions, concerning the zeolite module, was rather high.
1631.
Cvetković, A; Gorjanović, S; Hranisavljević, J; Vuc̀elić, D
Isolation and characterization of pathogenesis-related proteins from brewer's barley grain Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 1, pp. 51-56, 1997.
@article{Cvetković199751,
title = {Isolation and characterization of pathogenesis-related proteins from brewer's barley grain},
author = {A Cvetković and S Gorjanović and J Hranisavljević and D Vuc̀elić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031542760&partnerID=40&md5=63576abf9f14468682dd9d8c589038cd},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {1},
pages = {51-56},
abstract = {Two pathogenesis-related proteins have been isolated from brewer's barley grain. They were characterized and found to be homologous basic glycoproteins with relative molecular mass of 21 and 22 kDa and neutral sugar content of 2.8% and 5.0%, respectively. The protective role of isolated proteins in barley seeds has been confirmed by their inhibitory activity on Candida albicans growth and on brewer's yeast fermenting activity.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Two pathogenesis-related proteins have been isolated from brewer's barley grain. They were characterized and found to be homologous basic glycoproteins with relative molecular mass of 21 and 22 kDa and neutral sugar content of 2.8% and 5.0%, respectively. The protective role of isolated proteins in barley seeds has been confirmed by their inhibitory activity on Candida albicans growth and on brewer's yeast fermenting activity.
1632.
Stoiljković, M M; Holclajtner-Antunović, I
Spectral and electrical characteristics of a stabilized DC arc seeded with potassium Journal Article
In: Contributions to Plasma Physics, vol. 37, no. 5, pp. 459-468, 1997.
@article{Stoiljković1997459,
title = {Spectral and electrical characteristics of a stabilized DC arc seeded with potassium},
author = {M M Stoiljković and I Holclajtner-Antunović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031532364&doi=10.1002%2fctpp.2150370507&partnerID=40&md5=7536e5257183b710b3dda52b3822108e},
doi = {10.1002/ctpp.2150370507},
year = {1997},
date = {1997-01-01},
journal = {Contributions to Plasma Physics},
volume = {37},
number = {5},
pages = {459-468},
abstract = {A systematic investigation of spectral and voltage-current (U-I) characteristics of a DC arc plasma was performed. The vertical, argon and wall stabilized DC arc plasma was seeded by an easily ionizable element (EIE), potassium, in a wide range of concentrations. It was found that different arc currents and potassium contents in the plasma have considerable influence on the plasma properties. A lower potassium content (< 10 g/l of KCl in solution) introduced into the arc at lower currents (<6A) causes an increase in arc voltage and a change in the arc spectrum (intensity of lines), while at higher arc currents (>6A) it causes no change in the electrical characteristics, but a further change in the intensity of the arc spectrum. Higher potassium concentrations, >20 g/l of KCl, increase the arc voltage at higher currents (>6A). There is a critical quantity of potassium in the plasma which suppresses high energy processes (ionization, excitation...) for a fixed arc current, while spectral composition and lateral distribution of the residual emitted spectra become essentially changed. Amounts of potassium above critical do not cause further changes in the plasma spectral composition nor in the I-U characteristic, except in the spectral line intensities.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A systematic investigation of spectral and voltage-current (U-I) characteristics of a DC arc plasma was performed. The vertical, argon and wall stabilized DC arc plasma was seeded by an easily ionizable element (EIE), potassium, in a wide range of concentrations. It was found that different arc currents and potassium contents in the plasma have considerable influence on the plasma properties. A lower potassium content (< 10 g/l of KCl in solution) introduced into the arc at lower currents (<6A) causes an increase in arc voltage and a change in the arc spectrum (intensity of lines), while at higher arc currents (>6A) it causes no change in the electrical characteristics, but a further change in the intensity of the arc spectrum. Higher potassium concentrations, >20 g/l of KCl, increase the arc voltage at higher currents (>6A). There is a critical quantity of potassium in the plasma which suppresses high energy processes (ionization, excitation...) for a fixed arc current, while spectral composition and lateral distribution of the residual emitted spectra become essentially changed. Amounts of potassium above critical do not cause further changes in the plasma spectral composition nor in the I-U characteristic, except in the spectral line intensities.
1633.
Marković, R; Minić, D M
Conductometric and thermal studies of fused Zn(II) salts containing methyl substituted pyridinium cations Journal Article
In: Materials Chemistry and Physics, vol. 50, no. 1, pp. 20-24, 1997.
@article{Marković199720,
title = {Conductometric and thermal studies of fused Zn(II) salts containing methyl substituted pyridinium cations},
author = {R Marković and D M Minić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031210749&doi=10.1016%2fS0254-0584%2897%2980178-2&partnerID=40&md5=bcbaaa7931342276c17b10ffa11295ca},
doi = {10.1016/S0254-0584(97)80178-2},
year = {1997},
date = {1997-01-01},
journal = {Materials Chemistry and Physics},
volume = {50},
number = {1},
pages = {20-24},
abstract = {Alkyl-substituted pyridinium salts each possessing a bulky polyatomic zincate ion have been synthesized with the objective of measuring their electrical conductivity and investigating their thermal stability. The influence of hydrogen bonding and methyl substituent (s) located at different positions in the aromatic fragment in the molecule on the structure-conductivity relationship has been studied. It has been experimentally verified that the mechanism by which the protonic conductivity is enhanced or diminished depends to a certain degree on steric factors, i.e. the proximity of the large orthochlorozincate ion and methyl substituents.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Alkyl-substituted pyridinium salts each possessing a bulky polyatomic zincate ion have been synthesized with the objective of measuring their electrical conductivity and investigating their thermal stability. The influence of hydrogen bonding and methyl substituent (s) located at different positions in the aromatic fragment in the molecule on the structure-conductivity relationship has been studied. It has been experimentally verified that the mechanism by which the protonic conductivity is enhanced or diminished depends to a certain degree on steric factors, i.e. the proximity of the large orthochlorozincate ion and methyl substituents.
1634.
Minić, D M; Marković, R
Correlations of conductometric and thermic properties with the structure of di(2-methylpyridinium) tetrachloromanganate(II) Journal Article
In: Materials Chemistry and Physics, vol. 48, no. 2, pp. 174-177, 1997.
@article{Minić1997174,
title = {Correlations of conductometric and thermic properties with the structure of di(2-methylpyridinium) tetrachloromanganate(II)},
author = {D M Minić and R Marković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031118730&doi=10.1016%2fS0254-0584%2897%2980115-0&partnerID=40&md5=b41f41641006e4dbdcb90141d2e3ada5},
doi = {10.1016/S0254-0584(97)80115-0},
year = {1997},
date = {1997-01-01},
journal = {Materials Chemistry and Physics},
volume = {48},
number = {2},
pages = {174-177},
abstract = {Electric, thermic and spectral data of di(2-methylpyridinium)tetrachloromanganate(II) has been analyzed in terms of the structural properties of this salt. The dependence of the conductance on the absence or presence of the hydrogen bonding, as detected by the spectral studies for pyridinium salts containing polyatomic MnCl2- 4 ions or chloride ions, respectively, has also been investigated. The experimental results indicate that the enhancement or decrease of the conductance is strongly affected by the specific position of the alkyl group in the pyridinium portion of the salts.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Electric, thermic and spectral data of di(2-methylpyridinium)tetrachloromanganate(II) has been analyzed in terms of the structural properties of this salt. The dependence of the conductance on the absence or presence of the hydrogen bonding, as detected by the spectral studies for pyridinium salts containing polyatomic MnCl2- 4 ions or chloride ions, respectively, has also been investigated. The experimental results indicate that the enhancement or decrease of the conductance is strongly affected by the specific position of the alkyl group in the pyridinium portion of the salts.
1635.
Adnadević, B K; Agabalyan, L G
Homologation: The pathway of olefine conversion over pentasil zeolites Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 5, pp. 409-415, 1997.
@article{Adnadević1997409,
title = {Homologation: The pathway of olefine conversion over pentasil zeolites},
author = {B K Adnadević and L G Agabalyan},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031522281&partnerID=40&md5=4db1a45c2edfb8fe407e338f81e8d9e4},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {5},
pages = {409-415},
abstract = {Catalytic conversion of low concentration of gaseous mixtures of various alkenes in He over NiS modified zeolite of pentasil type was studied. Based on the established changes in the distribution of the products of catalytic conversion of alkene with a change in the reaction temperature and the concentration of alkene, benzene and CH 3 l in gas mixture, the model of the mechanism of catalytic conversion of alkene on zeolite catalyst was proposed. According to the model, the catalytic conversion, depending on reaction conditions, develops in three stages. In the first stage the transformation alkene fragments (cracks) and forms the so-called C 1 -intermediate particles. The formed C 1 -intermediate particles interact with the alkenes present in the reacton system by homologation reactions (the second stage of the transformation) which results in the growth of the carbon chain of the initial alkene. At high concentrations of the initial alkene, newly formed alkenes of relatively high molecular mass undergo disproportionation (the third stage of the transformation). The presumed model completely explains the changes appearing in the distribution of the products of catalytic conversion of alkene on the studies zeolite, under the influence of the changes in the reaction temperature and the concentration of alkene CH 3 l, and benzene in the gaseous mixture.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Catalytic conversion of low concentration of gaseous mixtures of various alkenes in He over NiS modified zeolite of pentasil type was studied. Based on the established changes in the distribution of the products of catalytic conversion of alkene with a change in the reaction temperature and the concentration of alkene, benzene and CH 3 l in gas mixture, the model of the mechanism of catalytic conversion of alkene on zeolite catalyst was proposed. According to the model, the catalytic conversion, depending on reaction conditions, develops in three stages. In the first stage the transformation alkene fragments (cracks) and forms the so-called C 1 -intermediate particles. The formed C 1 -intermediate particles interact with the alkenes present in the reacton system by homologation reactions (the second stage of the transformation) which results in the growth of the carbon chain of the initial alkene. At high concentrations of the initial alkene, newly formed alkenes of relatively high molecular mass undergo disproportionation (the third stage of the transformation). The presumed model completely explains the changes appearing in the distribution of the products of catalytic conversion of alkene on the studies zeolite, under the influence of the changes in the reaction temperature and the concentration of alkene CH 3 l, and benzene in the gaseous mixture.
1636.
Sužnjević, D; Blagojević, S; Vidić, J; Erceg, M; Vučelić, D
Determination of Selenium(IV) by Cathodic Stripping Voltammetry Using a Copper Microelectrode Journal Article
In: Microchemical Journal, vol. 57, no. 2, pp. 255-260, 1997.
@article{Sužnjević1997255,
title = {Determination of Selenium(IV) by Cathodic Stripping Voltammetry Using a Copper Microelectrode},
author = {D Sužnjević and S Blagojević and J Vidić and M Erceg and D Vučelić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0343768417&partnerID=40&md5=168ec2be737cfe98d777a632f0b8c3fa},
year = {1997},
date = {1997-01-01},
journal = {Microchemical Journal},
volume = {57},
number = {2},
pages = {255-260},
abstract = {Using a copper microelectrode of ∼5-μm diameter, the concentration of Se(IV) was determined by cathodic stripping voltammetry either from HClO4 (0.1 M) or from NaClO4 (0.1 M) supporting electrolytes. The preconcentration time of 15 s was chosen as optimal, and calibration graphs were constructed for the applied concentration interval 5 to 50 μM. Satisfactory reproducibility was obtained, with a standard deviation for 5 μM concentration (n = 10) of about 4%. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Using a copper microelectrode of ∼5-μm diameter, the concentration of Se(IV) was determined by cathodic stripping voltammetry either from HClO4 (0.1 M) or from NaClO4 (0.1 M) supporting electrolytes. The preconcentration time of 15 s was chosen as optimal, and calibration graphs were constructed for the applied concentration interval 5 to 50 μM. Satisfactory reproducibility was obtained, with a standard deviation for 5 μM concentration (n = 10) of about 4%. © 1997 Academic Press.
1637.
Perić, M; Ostojić, B; Engels, B
Ab Initio Study of the Electronic Spectrum of B2H2: II. Potential Curves for Torsional Motion, Symmetric B-H Stretching, and B-B Separation Journal Article
In: Journal of Molecular Spectroscopy, vol. 182, no. 2, pp. 295-308, 1997.
@article{Perić1997295,
title = {Ab Initio Study of the Electronic Spectrum of B2H2: II. Potential Curves for Torsional Motion, Symmetric B-H Stretching, and B-B Separation},
author = {M Perić and B Ostojić and B Engels},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040069687&doi=10.1006%2fjmsp.1996.7234&partnerID=40&md5=869aa1e839e4da0fa890a4d41cf99a18},
doi = {10.1006/jmsp.1996.7234},
year = {1997},
date = {1997-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {182},
number = {2},
pages = {295-308},
abstract = {The results of ab initio calculations of the potential curves for the torsional motion, symmetric H-B stretching, and B-B stretching in low-lying valence- and Rydberg-character triplet and singlet electronic states of B2H2 are reported. Particularly, the dissociation process B2H2 → BH + BH out of various electronic states of B2H2 is studied. The nature of binding in B2H2 is discussed in terms of the composition of the electronic wavefunctions. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The results of ab initio calculations of the potential curves for the torsional motion, symmetric H-B stretching, and B-B stretching in low-lying valence- and Rydberg-character triplet and singlet electronic states of B2H2 are reported. Particularly, the dissociation process B2H2 → BH + BH out of various electronic states of B2H2 is studied. The nature of binding in B2H2 is discussed in terms of the composition of the electronic wavefunctions. © 1997 Academic Press.
1638.
Perić, M; Ostojić, B; Engels, B
Ab Initio Study of the Electronic Spectrum of B2H2: I. Vertical Spectrum and trans- and cis-Bending Potential Curves Journal Article
In: Journal of Molecular Spectroscopy, vol. 182, no. 2, pp. 280-294, 1997.
@article{Perić1997280,
title = {Ab Initio Study of the Electronic Spectrum of B2H2: I. Vertical Spectrum and trans- and cis-Bending Potential Curves},
author = {M Perić and B Ostojić and B Engels},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039477932&doi=10.1006%2fjmsp.1996.7233&partnerID=40&md5=c4cc861e95465e04d78d220f821a3fe4},
doi = {10.1006/jmsp.1996.7233},
year = {1997},
date = {1997-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {182},
number = {2},
pages = {280-294},
abstract = {The present paper represents the first part of an extensive theoretical study on the electronic spectrum of B2H2. The results of ab initio calculations of the vertical spectrum and the trans- and cis-bending potential curves for the low-lying triplet and singlet electronic states are reported. Special attention is paid to the study of the interaction between valence- and Rydberg-type electronic species. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The present paper represents the first part of an extensive theoretical study on the electronic spectrum of B2H2. The results of ab initio calculations of the vertical spectrum and the trans- and cis-bending potential curves for the low-lying triplet and singlet electronic states are reported. Special attention is paid to the study of the interaction between valence- and Rydberg-type electronic species. © 1997 Academic Press.
1639.
Radotic, K; Zakrzewska, J; Sladic, D; Jeremic, M
In: Photochemistry and Photobiology, vol. 65, no. 2, pp. 284-291, 1997.
@article{Radotic1997284,
title = {Study of photochemical reactions of coniferyl alcohol I. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol},
author = {K Radotic and J Zakrzewska and D Sladic and M Jeremic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030990989&partnerID=40&md5=2619dea18ca1eaddad26c9b04a134ce5},
year = {1997},
date = {1997-01-01},
journal = {Photochemistry and Photobiology},
volume = {65},
number = {2},
pages = {284-291},
abstract = {Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and 1 H NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation. This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and 1 H NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation. This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.
1640.
Sužnjević, D; Blagojević, S; Vučelić, D; Zuman, P
Polarographic Determination of Hydrogen Peroxide in Perborate Containing Commercial Detergents under the Bleaching Process Condition Journal Article
In: Electroanalysis, vol. 9, no. 11, pp. 861-864, 1997.
@article{Sužnjević1997861,
title = {Polarographic Determination of Hydrogen Peroxide in Perborate Containing Commercial Detergents under the Bleaching Process Condition},
author = {D Sužnjević and S Blagojević and D Vučelić and P Zuman},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0347833193&doi=10.1002%2felan.1140091111&partnerID=40&md5=2677aef8b4cef796b0013a85c925e44f},
doi = {10.1002/elan.1140091111},
year = {1997},
date = {1997-01-01},
journal = {Electroanalysis},
volume = {9},
number = {11},
pages = {861-864},
abstract = {Differential pulse (DP) and current sampled (TAST) polarography were applied for measuring hydrogen peroxide in actual washing systems. In addition to the possibility of the hydrogen peroxide determination in commercial detergent species containing sodium perborate monohydrate as bleaching substance, the change in peroxide concentration can be followed under the conditions which usually exist in the washing process. The possibility of determining dissolved oxygen in the peroxide decomposition reaction was also demonstrated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Differential pulse (DP) and current sampled (TAST) polarography were applied for measuring hydrogen peroxide in actual washing systems. In addition to the possibility of the hydrogen peroxide determination in commercial detergent species containing sodium perborate monohydrate as bleaching substance, the change in peroxide concentration can be followed under the conditions which usually exist in the washing process. The possibility of determining dissolved oxygen in the peroxide decomposition reaction was also demonstrated.
1997
Simić, S M; Devečerski, A B
Thermochemical behavior of C 60 . Kinetics of decomposition in different atmospheres Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 7, pp. 615-618, 1997.
@article{Simić1997615,
title = {Thermochemical behavior of C 60 . Kinetics of decomposition in different atmospheres},
author = {S M Simić and A B Devečerski},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0041165395&partnerID=40&md5=18afecb9861312cf89bf4ab1a27d4d5f},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {7},
pages = {615-618},
abstract = {The processes of decomposition of C 60 in different atmospheres were investigated by TG and DTG methods. It was observed that the temperature maxima on the DTG curves are shifted towards higher temperatures by about 200 K in an inert nitrogen atmosphere compared to the values in air. Kinetic parameters were calculated by methods evaluated for processes under nonisothermal conditions. In air, where oxidation takes place, the values of the activation energy depending on the method used, are: E a =145 ± 6 kJ/mol (Freeman-Carroll), E a = 138 ± 16 kJ/mol (Ozawa), E a = 121 ± 14 kJ/mol (Kissinger). In nitrogen, where sublimation occurs, the values of the activation energy are: E a = 130 ± 8 kJ/mol (Freeman-Carroll). E a =157 ± 16 kJ/mol (Ozawa), E a = 141 ± 14 kJ/mol (Kissinger).},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The processes of decomposition of C 60 in different atmospheres were investigated by TG and DTG methods. It was observed that the temperature maxima on the DTG curves are shifted towards higher temperatures by about 200 K in an inert nitrogen atmosphere compared to the values in air. Kinetic parameters were calculated by methods evaluated for processes under nonisothermal conditions. In air, where oxidation takes place, the values of the activation energy depending on the method used, are: E a =145 ± 6 kJ/mol (Freeman-Carroll), E a = 138 ± 16 kJ/mol (Ozawa), E a = 121 ± 14 kJ/mol (Kissinger). In nitrogen, where sublimation occurs, the values of the activation energy are: E a = 130 ± 8 kJ/mol (Freeman-Carroll). E a =157 ± 16 kJ/mol (Ozawa), E a = 141 ± 14 kJ/mol (Kissinger).
Perić, M; Ostojić, B
Quantum chemical calculation of the electronic spectrum of the B 2 H 2 radical. Comparison with spectra of related species Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 9, pp. 817-835, 1997.
@article{Perić1997817,
title = {Quantum chemical calculation of the electronic spectrum of the B 2 H 2 radical. Comparison with spectra of related species},
author = {M Perić and B Ostojić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031508974&partnerID=40&md5=58a41d2127c9f7b92453b3cf96a896e2},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {9},
pages = {817-835},
abstract = {The singlet and triplet electronic states of the B 2 H 2 radical are calculated by means of the quantum chemical ab initio method. The spectrum is compared with those of related molecular and atomic species. It is found that there is a great similarity between the global structures of the spectra of B 2 H 2 and O 2 . The nature of the binding in B 2 H 2 is discussed in terms of the composition of the molecular orbitals and the molecular geometry dependence of their energy.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The singlet and triplet electronic states of the B 2 H 2 radical are calculated by means of the quantum chemical ab initio method. The spectrum is compared with those of related molecular and atomic species. It is found that there is a great similarity between the global structures of the spectra of B 2 H 2 and O 2 . The nature of the binding in B 2 H 2 is discussed in terms of the composition of the molecular orbitals and the molecular geometry dependence of their energy.
Sabo, T J; Vlajković, J; Dondur, V
The mechanisms of tris(4-morpholinecarbodithioato-S,S′)cobalt(III) complex formation by solid state reaction from ammine cobalt(III) complexes Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 11, pp. 1037-1044, 1997.
@article{Sabo19971037,
title = {The mechanisms of tris(4-morpholinecarbodithioato-S,S′)cobalt(III) complex formation by solid state reaction from ammine cobalt(III) complexes},
author = {T J Sabo and J Vlajković and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031521179&partnerID=40&md5=6430bb353708351792540d9f0c0a73bd},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {11},
pages = {1037-1044},
abstract = {In this paper, the solid state reaction, conducted with a mixture of pentaamminechlorocobalt(III) chloride and potassium 4-morpholinecarbodithioate was investigated under isothermal conditions. The reaction proceeds at relatively low temperatures (154-192 °C). The yield of product solid-solid reaction, tris(4-morpholinecarbodithioato-S,S')cobalt(III) complex, does not exceed 65%. The kinetic of the reaction of powdered and pressed samples were investigated. The reaction proceeded according to the diffusional mechanism. Activation energies of 200 kJ/mol and 100 kJ/mol for the powdered and pressed form, respectively, were obtained.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this paper, the solid state reaction, conducted with a mixture of pentaamminechlorocobalt(III) chloride and potassium 4-morpholinecarbodithioate was investigated under isothermal conditions. The reaction proceeds at relatively low temperatures (154-192 °C). The yield of product solid-solid reaction, tris(4-morpholinecarbodithioato-S,S')cobalt(III) complex, does not exceed 65%. The kinetic of the reaction of powdered and pressed samples were investigated. The reaction proceeded according to the diffusional mechanism. Activation energies of 200 kJ/mol and 100 kJ/mol for the powdered and pressed form, respectively, were obtained.
Holclajtner-Antunović, I; Raspopović, Z; Georgijević, V; Tripković, M
Computer Simulation of Added Li Influence on the ICP Properties Journal Article
In: Plasma Chemistry and Plasma Processing, vol. 17, no. 3, pp. 331-352, 1997.
@article{Holclajtner-Antunović1997331,
title = {Computer Simulation of Added Li Influence on the ICP Properties},
author = {I Holclajtner-Antunović and Z Raspopović and V Georgijević and M Tripković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031517702&doi=10.1007%2fBF02766839&partnerID=40&md5=93341170cd8ee3c6d11820da1cb10751},
doi = {10.1007/BF02766839},
year = {1997},
date = {1997-01-01},
journal = {Plasma Chemistry and Plasma Processing},
volume = {17},
number = {3},
pages = {331-352},
abstract = {The influence of added Li on the ICP characteristics is investigated by computer simulation. The transport and the thermodynamic parameters of Li in the temperature interval between 300 and 13,000 K are taken from the literature, while in the case of absence of those, the data were estimated. The HiFI computer program was used for calculation of spatial distributions of temperature, velocity, and electromagnetic fields for argon plasma with the presence of different quantities of Li up to 30%. On the basis of calculated temperature field and equilibrium plasma composition the spatial distribution of electron density was determined. It was found that the addition of Li considerably influences the spatial distributions of all analyzed plasma parameters at Li concentrations higher than 1%. It is shown that the electron density is the most sensible among all analyzed parameters of the presence of Li.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The influence of added Li on the ICP characteristics is investigated by computer simulation. The transport and the thermodynamic parameters of Li in the temperature interval between 300 and 13,000 K are taken from the literature, while in the case of absence of those, the data were estimated. The HiFI computer program was used for calculation of spatial distributions of temperature, velocity, and electromagnetic fields for argon plasma with the presence of different quantities of Li up to 30%. On the basis of calculated temperature field and equilibrium plasma composition the spatial distribution of electron density was determined. It was found that the addition of Li considerably influences the spatial distributions of all analyzed plasma parameters at Li concentrations higher than 1%. It is shown that the electron density is the most sensible among all analyzed parameters of the presence of Li.
Šušić, M V
Hydriding and dehydriding of palladium-doped charcoal Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 8, pp. 631-634, 1997.
@article{Šušić1997631,
title = {Hydriding and dehydriding of palladium-doped charcoal},
author = {M V Šušić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040681824&partnerID=40&md5=883b143fc45a03250148ec164467cff6},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {8},
pages = {631-634},
abstract = {The hydrogen absorption capability of wood charcoal doped with 0.0049% of palladium was examined by differential scanning calorimet-y. Hydriding and subsequent dehydriding (oxidation) indicate that the absorbent, due to the spill-over effect, absorbs substantial quantities of hydrogen at atmospheric pressure.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The hydrogen absorption capability of wood charcoal doped with 0.0049% of palladium was examined by differential scanning calorimet-y. Hydriding and subsequent dehydriding (oxidation) indicate that the absorbent, due to the spill-over effect, absorbs substantial quantities of hydrogen at atmospheric pressure.
Šušić, M V
Hydriding and dehydriding of palladium-doped carbonyl nickel and of the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 11, pp. 1137-1141, 1997.
@article{Šušić19971137,
title = {Hydriding and dehydriding of palladium-doped carbonyl nickel and of the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45},
author = {M V Šušić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040088067&partnerID=40&md5=fecfa5c2b9231b23c5b19978ee96cb52},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {11},
pages = {1137-1141},
abstract = {Carbonyl nickel and the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 were doped with 0.0027 to 0.013 wt.% of palladium. Heating in a hydrogen stream produces hydrides with 28 to 45 hydrogen atoms per atom (molecule) of the substances.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Carbonyl nickel and the intermetallic alloys Zr 53 Ni 47 and Zr 55 Co 45 were doped with 0.0027 to 0.013 wt.% of palladium. Heating in a hydrogen stream produces hydrides with 28 to 45 hydrogen atoms per atom (molecule) of the substances.
Vujaković, A; Tomašević-Čanović, M; Dondur, V
Interaction of dodecylamine with montmorillonite. Part I. Adsorption mechanism Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 7, pp. 599-605, 1997.
@article{Vujaković1997599,
title = {Interaction of dodecylamine with montmorillonite. Part I. Adsorption mechanism},
author = {A Vujaković and M Tomašević-Čanović and V Dondur},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039386097&partnerID=40&md5=95a92c4b5a346f24ee993077a427a075},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {7},
pages = {599-605},
abstract = {It was observed that dodecylamine adsorption on Na-montmorillonite occurred as the cation exchange of Na + ion by dodecylammonium ion, up to the dodecylamine addition of 70 mmol/z·100g clay. The results of particle size distribution analysis showed that increasing concentration of adsorbed dodecylamine was followed by increasing particle size in suspension. IR spectra of organoclay complexes showed the bands in the range 1490-1465 cm -1 corresponding to dodecylammonium ion chemisorbed on the silicate surfaces of montmorillonite.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
It was observed that dodecylamine adsorption on Na-montmorillonite occurred as the cation exchange of Na + ion by dodecylammonium ion, up to the dodecylamine addition of 70 mmol/z·100g clay. The results of particle size distribution analysis showed that increasing concentration of adsorbed dodecylamine was followed by increasing particle size in suspension. IR spectra of organoclay complexes showed the bands in the range 1490-1465 cm -1 corresponding to dodecylammonium ion chemisorbed on the silicate surfaces of montmorillonite.
Minić, D; Šušić, M; Tešić, Z; Dimitrijević, R
Investigation of the thermal behaviour of Ag-Pd intermetallic compounds in hydrogen atmosphere Journal Article
In: Studies in Surface Science and Catalysis, vol. 112, pp. 447-456, 1997.
@article{Minić1997447,
title = {Investigation of the thermal behaviour of Ag-Pd intermetallic compounds in hydrogen atmosphere},
author = {D Minić and M Šušić and Z Tešić and R Dimitrijević},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-33750410785&partnerID=40&md5=5220cfd61027526e0652515593942b3a},
year = {1997},
date = {1997-01-01},
journal = {Studies in Surface Science and Catalysis},
volume = {112},
pages = {447-456},
abstract = {It was shown by differential scanning calorimetry and X-ray diffraction that chemically prepared Ag-Pd intermetallic compounds of different composition in powder form are active hydrogen absorbers in the temperature range 20-300°C. During thermal treatment in vacuum transition into crystalline state takes place. The process of hydrogen absorption was analysed and thermodynamic and kinetic parameters of this process determined. © 1997 Elsevier Science B.V. All rights reserved.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
It was shown by differential scanning calorimetry and X-ray diffraction that chemically prepared Ag-Pd intermetallic compounds of different composition in powder form are active hydrogen absorbers in the temperature range 20-300°C. During thermal treatment in vacuum transition into crystalline state takes place. The process of hydrogen absorption was analysed and thermodynamic and kinetic parameters of this process determined. © 1997 Elsevier Science B.V. All rights reserved.
Mijović, S; Mitrović, M; Vučelić, D
Laboratory process for ethanol drying in a fixed bed of the zeolite 3A Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 4, pp. 353-359, 1997.
@article{Mijović1997353,
title = {Laboratory process for ethanol drying in a fixed bed of the zeolite 3A},
author = {S Mijović and M Mitrović and D Vučelić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0042230023&partnerID=40&md5=30db5bbdd0bd4dea56e261a8ad23cb37},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {4},
pages = {353-359},
abstract = {The conditions for the process of a liquid phase dehydration of ethanol were investigated. The dehydration was performed in a fixed bed adsorption column of granullar molecular sieve 3A, which was confirmed, as it is already known, to be the most efficient dessicant for organic solvents. The dynamic capacity of the adsorbent, as well as the cross-over ratio between the mass transfer zone (MTZ) and the heat wave developed during the adsorption step, were determined. The results of the experiments form the basis for the design of an industrial process to produce absolute ethanol, using a temperature swing adsorption (TSA) cycle.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The conditions for the process of a liquid phase dehydration of ethanol were investigated. The dehydration was performed in a fixed bed adsorption column of granullar molecular sieve 3A, which was confirmed, as it is already known, to be the most efficient dessicant for organic solvents. The dynamic capacity of the adsorbent, as well as the cross-over ratio between the mass transfer zone (MTZ) and the heat wave developed during the adsorption step, were determined. The results of the experiments form the basis for the design of an industrial process to produce absolute ethanol, using a temperature swing adsorption (TSA) cycle.
Dojčinović, M; Adnadjević, B; Andrejić, N
Influence of Zn2+ ions in a ZSM-5 catalyst on the C3-C4 hydrocarbons aromatization process Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 2, pp. 131-135, 1997.
@article{Dojčinović1997131,
title = {Influence of Zn2+ ions in a ZSM-5 catalyst on the C3-C4 hydrocarbons aromatization process},
author = {M Dojčinović and B Adnadjević and N Andrejić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039500681&partnerID=40&md5=c79c689c10e85f5619e2a57259e942e8},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {2},
pages = {131-135},
abstract = {Catalysts, based on zeolite ZSM-5 modified by Zn2+ ions, are suitable for aromatization of C3-C4 hydrocarbons. Zn2+ ions change the acidity of the catalysts by blocking the strong Brönsted acid centers. The most probable aromatization mechanism is presented. The catalyst, based on a zeolite ZSM-5, with a module 50 and with a Zn content of 2.4%, was laboratory produced and applied to the aromatisation of a propane-butane mixture. In the temperature interval of 673-873 K propane was not converted, so it was supposed that the catalyst has Brönstcd acid centers of medium strength, as well as Lewis acid centers, since the concentration of Zn2+ ions, concerning the zeolite module, was rather high.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Catalysts, based on zeolite ZSM-5 modified by Zn2+ ions, are suitable for aromatization of C3-C4 hydrocarbons. Zn2+ ions change the acidity of the catalysts by blocking the strong Brönsted acid centers. The most probable aromatization mechanism is presented. The catalyst, based on a zeolite ZSM-5, with a module 50 and with a Zn content of 2.4%, was laboratory produced and applied to the aromatisation of a propane-butane mixture. In the temperature interval of 673-873 K propane was not converted, so it was supposed that the catalyst has Brönstcd acid centers of medium strength, as well as Lewis acid centers, since the concentration of Zn2+ ions, concerning the zeolite module, was rather high.
Cvetković, A; Gorjanović, S; Hranisavljević, J; Vuc̀elić, D
Isolation and characterization of pathogenesis-related proteins from brewer's barley grain Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 1, pp. 51-56, 1997.
@article{Cvetković199751,
title = {Isolation and characterization of pathogenesis-related proteins from brewer's barley grain},
author = {A Cvetković and S Gorjanović and J Hranisavljević and D Vuc̀elić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031542760&partnerID=40&md5=63576abf9f14468682dd9d8c589038cd},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {1},
pages = {51-56},
abstract = {Two pathogenesis-related proteins have been isolated from brewer's barley grain. They were characterized and found to be homologous basic glycoproteins with relative molecular mass of 21 and 22 kDa and neutral sugar content of 2.8% and 5.0%, respectively. The protective role of isolated proteins in barley seeds has been confirmed by their inhibitory activity on Candida albicans growth and on brewer's yeast fermenting activity.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Two pathogenesis-related proteins have been isolated from brewer's barley grain. They were characterized and found to be homologous basic glycoproteins with relative molecular mass of 21 and 22 kDa and neutral sugar content of 2.8% and 5.0%, respectively. The protective role of isolated proteins in barley seeds has been confirmed by their inhibitory activity on Candida albicans growth and on brewer's yeast fermenting activity.
Stoiljković, M M; Holclajtner-Antunović, I
Spectral and electrical characteristics of a stabilized DC arc seeded with potassium Journal Article
In: Contributions to Plasma Physics, vol. 37, no. 5, pp. 459-468, 1997.
@article{Stoiljković1997459,
title = {Spectral and electrical characteristics of a stabilized DC arc seeded with potassium},
author = {M M Stoiljković and I Holclajtner-Antunović},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031532364&doi=10.1002%2fctpp.2150370507&partnerID=40&md5=7536e5257183b710b3dda52b3822108e},
doi = {10.1002/ctpp.2150370507},
year = {1997},
date = {1997-01-01},
journal = {Contributions to Plasma Physics},
volume = {37},
number = {5},
pages = {459-468},
abstract = {A systematic investigation of spectral and voltage-current (U-I) characteristics of a DC arc plasma was performed. The vertical, argon and wall stabilized DC arc plasma was seeded by an easily ionizable element (EIE), potassium, in a wide range of concentrations. It was found that different arc currents and potassium contents in the plasma have considerable influence on the plasma properties. A lower potassium content (< 10 g/l of KCl in solution) introduced into the arc at lower currents (<6A) causes an increase in arc voltage and a change in the arc spectrum (intensity of lines), while at higher arc currents (>6A) it causes no change in the electrical characteristics, but a further change in the intensity of the arc spectrum. Higher potassium concentrations, >20 g/l of KCl, increase the arc voltage at higher currents (>6A). There is a critical quantity of potassium in the plasma which suppresses high energy processes (ionization, excitation...) for a fixed arc current, while spectral composition and lateral distribution of the residual emitted spectra become essentially changed. Amounts of potassium above critical do not cause further changes in the plasma spectral composition nor in the I-U characteristic, except in the spectral line intensities.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
A systematic investigation of spectral and voltage-current (U-I) characteristics of a DC arc plasma was performed. The vertical, argon and wall stabilized DC arc plasma was seeded by an easily ionizable element (EIE), potassium, in a wide range of concentrations. It was found that different arc currents and potassium contents in the plasma have considerable influence on the plasma properties. A lower potassium content (< 10 g/l of KCl in solution) introduced into the arc at lower currents (<6A) causes an increase in arc voltage and a change in the arc spectrum (intensity of lines), while at higher arc currents (>6A) it causes no change in the electrical characteristics, but a further change in the intensity of the arc spectrum. Higher potassium concentrations, >20 g/l of KCl, increase the arc voltage at higher currents (>6A). There is a critical quantity of potassium in the plasma which suppresses high energy processes (ionization, excitation...) for a fixed arc current, while spectral composition and lateral distribution of the residual emitted spectra become essentially changed. Amounts of potassium above critical do not cause further changes in the plasma spectral composition nor in the I-U characteristic, except in the spectral line intensities.
Marković, R; Minić, D M
Conductometric and thermal studies of fused Zn(II) salts containing methyl substituted pyridinium cations Journal Article
In: Materials Chemistry and Physics, vol. 50, no. 1, pp. 20-24, 1997.
@article{Marković199720,
title = {Conductometric and thermal studies of fused Zn(II) salts containing methyl substituted pyridinium cations},
author = {R Marković and D M Minić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031210749&doi=10.1016%2fS0254-0584%2897%2980178-2&partnerID=40&md5=bcbaaa7931342276c17b10ffa11295ca},
doi = {10.1016/S0254-0584(97)80178-2},
year = {1997},
date = {1997-01-01},
journal = {Materials Chemistry and Physics},
volume = {50},
number = {1},
pages = {20-24},
abstract = {Alkyl-substituted pyridinium salts each possessing a bulky polyatomic zincate ion have been synthesized with the objective of measuring their electrical conductivity and investigating their thermal stability. The influence of hydrogen bonding and methyl substituent (s) located at different positions in the aromatic fragment in the molecule on the structure-conductivity relationship has been studied. It has been experimentally verified that the mechanism by which the protonic conductivity is enhanced or diminished depends to a certain degree on steric factors, i.e. the proximity of the large orthochlorozincate ion and methyl substituents.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Alkyl-substituted pyridinium salts each possessing a bulky polyatomic zincate ion have been synthesized with the objective of measuring their electrical conductivity and investigating their thermal stability. The influence of hydrogen bonding and methyl substituent (s) located at different positions in the aromatic fragment in the molecule on the structure-conductivity relationship has been studied. It has been experimentally verified that the mechanism by which the protonic conductivity is enhanced or diminished depends to a certain degree on steric factors, i.e. the proximity of the large orthochlorozincate ion and methyl substituents.
Minić, D M; Marković, R
Correlations of conductometric and thermic properties with the structure of di(2-methylpyridinium) tetrachloromanganate(II) Journal Article
In: Materials Chemistry and Physics, vol. 48, no. 2, pp. 174-177, 1997.
@article{Minić1997174,
title = {Correlations of conductometric and thermic properties with the structure of di(2-methylpyridinium) tetrachloromanganate(II)},
author = {D M Minić and R Marković},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031118730&doi=10.1016%2fS0254-0584%2897%2980115-0&partnerID=40&md5=b41f41641006e4dbdcb90141d2e3ada5},
doi = {10.1016/S0254-0584(97)80115-0},
year = {1997},
date = {1997-01-01},
journal = {Materials Chemistry and Physics},
volume = {48},
number = {2},
pages = {174-177},
abstract = {Electric, thermic and spectral data of di(2-methylpyridinium)tetrachloromanganate(II) has been analyzed in terms of the structural properties of this salt. The dependence of the conductance on the absence or presence of the hydrogen bonding, as detected by the spectral studies for pyridinium salts containing polyatomic MnCl2- 4 ions or chloride ions, respectively, has also been investigated. The experimental results indicate that the enhancement or decrease of the conductance is strongly affected by the specific position of the alkyl group in the pyridinium portion of the salts.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Electric, thermic and spectral data of di(2-methylpyridinium)tetrachloromanganate(II) has been analyzed in terms of the structural properties of this salt. The dependence of the conductance on the absence or presence of the hydrogen bonding, as detected by the spectral studies for pyridinium salts containing polyatomic MnCl2- 4 ions or chloride ions, respectively, has also been investigated. The experimental results indicate that the enhancement or decrease of the conductance is strongly affected by the specific position of the alkyl group in the pyridinium portion of the salts.
Adnadević, B K; Agabalyan, L G
Homologation: The pathway of olefine conversion over pentasil zeolites Journal Article
In: Journal of the Serbian Chemical Society, vol. 62, no. 5, pp. 409-415, 1997.
@article{Adnadević1997409,
title = {Homologation: The pathway of olefine conversion over pentasil zeolites},
author = {B K Adnadević and L G Agabalyan},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0031522281&partnerID=40&md5=4db1a45c2edfb8fe407e338f81e8d9e4},
year = {1997},
date = {1997-01-01},
journal = {Journal of the Serbian Chemical Society},
volume = {62},
number = {5},
pages = {409-415},
abstract = {Catalytic conversion of low concentration of gaseous mixtures of various alkenes in He over NiS modified zeolite of pentasil type was studied. Based on the established changes in the distribution of the products of catalytic conversion of alkene with a change in the reaction temperature and the concentration of alkene, benzene and CH 3 l in gas mixture, the model of the mechanism of catalytic conversion of alkene on zeolite catalyst was proposed. According to the model, the catalytic conversion, depending on reaction conditions, develops in three stages. In the first stage the transformation alkene fragments (cracks) and forms the so-called C 1 -intermediate particles. The formed C 1 -intermediate particles interact with the alkenes present in the reacton system by homologation reactions (the second stage of the transformation) which results in the growth of the carbon chain of the initial alkene. At high concentrations of the initial alkene, newly formed alkenes of relatively high molecular mass undergo disproportionation (the third stage of the transformation). The presumed model completely explains the changes appearing in the distribution of the products of catalytic conversion of alkene on the studies zeolite, under the influence of the changes in the reaction temperature and the concentration of alkene CH 3 l, and benzene in the gaseous mixture.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Catalytic conversion of low concentration of gaseous mixtures of various alkenes in He over NiS modified zeolite of pentasil type was studied. Based on the established changes in the distribution of the products of catalytic conversion of alkene with a change in the reaction temperature and the concentration of alkene, benzene and CH 3 l in gas mixture, the model of the mechanism of catalytic conversion of alkene on zeolite catalyst was proposed. According to the model, the catalytic conversion, depending on reaction conditions, develops in three stages. In the first stage the transformation alkene fragments (cracks) and forms the so-called C 1 -intermediate particles. The formed C 1 -intermediate particles interact with the alkenes present in the reacton system by homologation reactions (the second stage of the transformation) which results in the growth of the carbon chain of the initial alkene. At high concentrations of the initial alkene, newly formed alkenes of relatively high molecular mass undergo disproportionation (the third stage of the transformation). The presumed model completely explains the changes appearing in the distribution of the products of catalytic conversion of alkene on the studies zeolite, under the influence of the changes in the reaction temperature and the concentration of alkene CH 3 l, and benzene in the gaseous mixture.
Sužnjević, D; Blagojević, S; Vidić, J; Erceg, M; Vučelić, D
Determination of Selenium(IV) by Cathodic Stripping Voltammetry Using a Copper Microelectrode Journal Article
In: Microchemical Journal, vol. 57, no. 2, pp. 255-260, 1997.
@article{Sužnjević1997255,
title = {Determination of Selenium(IV) by Cathodic Stripping Voltammetry Using a Copper Microelectrode},
author = {D Sužnjević and S Blagojević and J Vidić and M Erceg and D Vučelić},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0343768417&partnerID=40&md5=168ec2be737cfe98d777a632f0b8c3fa},
year = {1997},
date = {1997-01-01},
journal = {Microchemical Journal},
volume = {57},
number = {2},
pages = {255-260},
abstract = {Using a copper microelectrode of ∼5-μm diameter, the concentration of Se(IV) was determined by cathodic stripping voltammetry either from HClO4 (0.1 M) or from NaClO4 (0.1 M) supporting electrolytes. The preconcentration time of 15 s was chosen as optimal, and calibration graphs were constructed for the applied concentration interval 5 to 50 μM. Satisfactory reproducibility was obtained, with a standard deviation for 5 μM concentration (n = 10) of about 4%. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Using a copper microelectrode of ∼5-μm diameter, the concentration of Se(IV) was determined by cathodic stripping voltammetry either from HClO4 (0.1 M) or from NaClO4 (0.1 M) supporting electrolytes. The preconcentration time of 15 s was chosen as optimal, and calibration graphs were constructed for the applied concentration interval 5 to 50 μM. Satisfactory reproducibility was obtained, with a standard deviation for 5 μM concentration (n = 10) of about 4%. © 1997 Academic Press.
Perić, M; Ostojić, B; Engels, B
Ab Initio Study of the Electronic Spectrum of B2H2: II. Potential Curves for Torsional Motion, Symmetric B-H Stretching, and B-B Separation Journal Article
In: Journal of Molecular Spectroscopy, vol. 182, no. 2, pp. 295-308, 1997.
@article{Perić1997295,
title = {Ab Initio Study of the Electronic Spectrum of B2H2: II. Potential Curves for Torsional Motion, Symmetric B-H Stretching, and B-B Separation},
author = {M Perić and B Ostojić and B Engels},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0040069687&doi=10.1006%2fjmsp.1996.7234&partnerID=40&md5=869aa1e839e4da0fa890a4d41cf99a18},
doi = {10.1006/jmsp.1996.7234},
year = {1997},
date = {1997-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {182},
number = {2},
pages = {295-308},
abstract = {The results of ab initio calculations of the potential curves for the torsional motion, symmetric H-B stretching, and B-B stretching in low-lying valence- and Rydberg-character triplet and singlet electronic states of B2H2 are reported. Particularly, the dissociation process B2H2 → BH + BH out of various electronic states of B2H2 is studied. The nature of binding in B2H2 is discussed in terms of the composition of the electronic wavefunctions. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The results of ab initio calculations of the potential curves for the torsional motion, symmetric H-B stretching, and B-B stretching in low-lying valence- and Rydberg-character triplet and singlet electronic states of B2H2 are reported. Particularly, the dissociation process B2H2 → BH + BH out of various electronic states of B2H2 is studied. The nature of binding in B2H2 is discussed in terms of the composition of the electronic wavefunctions. © 1997 Academic Press.
Perić, M; Ostojić, B; Engels, B
Ab Initio Study of the Electronic Spectrum of B2H2: I. Vertical Spectrum and trans- and cis-Bending Potential Curves Journal Article
In: Journal of Molecular Spectroscopy, vol. 182, no. 2, pp. 280-294, 1997.
@article{Perić1997280,
title = {Ab Initio Study of the Electronic Spectrum of B2H2: I. Vertical Spectrum and trans- and cis-Bending Potential Curves},
author = {M Perić and B Ostojić and B Engels},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0039477932&doi=10.1006%2fjmsp.1996.7233&partnerID=40&md5=c4cc861e95465e04d78d220f821a3fe4},
doi = {10.1006/jmsp.1996.7233},
year = {1997},
date = {1997-01-01},
journal = {Journal of Molecular Spectroscopy},
volume = {182},
number = {2},
pages = {280-294},
abstract = {The present paper represents the first part of an extensive theoretical study on the electronic spectrum of B2H2. The results of ab initio calculations of the vertical spectrum and the trans- and cis-bending potential curves for the low-lying triplet and singlet electronic states are reported. Special attention is paid to the study of the interaction between valence- and Rydberg-type electronic species. © 1997 Academic Press.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The present paper represents the first part of an extensive theoretical study on the electronic spectrum of B2H2. The results of ab initio calculations of the vertical spectrum and the trans- and cis-bending potential curves for the low-lying triplet and singlet electronic states are reported. Special attention is paid to the study of the interaction between valence- and Rydberg-type electronic species. © 1997 Academic Press.
Radotic, K; Zakrzewska, J; Sladic, D; Jeremic, M
In: Photochemistry and Photobiology, vol. 65, no. 2, pp. 284-291, 1997.
@article{Radotic1997284,
title = {Study of photochemical reactions of coniferyl alcohol I. Mechanism and intermediate products of UV radiation-induced polymerization of coniferyl alcohol},
author = {K Radotic and J Zakrzewska and D Sladic and M Jeremic},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0030990989&partnerID=40&md5=2619dea18ca1eaddad26c9b04a134ce5},
year = {1997},
date = {1997-01-01},
journal = {Photochemistry and Photobiology},
volume = {65},
number = {2},
pages = {284-291},
abstract = {Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and 1 H NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation. This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ultraviolet light-induced photochemical transformations of coniferyl alcohol have been studied, using spectrophotometric and 1 H NMR approaches. It was shown earlier that coniferyl alcohol can be polymerized not only enzymically but also by photoirradiation. This study furthers our knowledge on the UV radiation-induced polymerization of coniferyl alcohol. In the photochemical reaction of coniferyl alcohol, quinone-methide is the first transient formed. In subsequent reactions quinone-methide produces dimers, oligomers and a polymer as the end product. The reaction rate constants are pH dependent. The results are interpreted in terms of an ionic mechanism of the photochemical reaction, contrary to enzymic polymerization that involves formation of phenoxy radicals. The study may have ecological importance because of the increase of UV radiation reaching the earth's surface due to ozone layer depletion.
Sužnjević, D; Blagojević, S; Vučelić, D; Zuman, P
Polarographic Determination of Hydrogen Peroxide in Perborate Containing Commercial Detergents under the Bleaching Process Condition Journal Article
In: Electroanalysis, vol. 9, no. 11, pp. 861-864, 1997.
@article{Sužnjević1997861,
title = {Polarographic Determination of Hydrogen Peroxide in Perborate Containing Commercial Detergents under the Bleaching Process Condition},
author = {D Sužnjević and S Blagojević and D Vučelić and P Zuman},
url = {https://www.scopus.com/inward/record.uri?eid=2-s2.0-0347833193&doi=10.1002%2felan.1140091111&partnerID=40&md5=2677aef8b4cef796b0013a85c925e44f},
doi = {10.1002/elan.1140091111},
year = {1997},
date = {1997-01-01},
journal = {Electroanalysis},
volume = {9},
number = {11},
pages = {861-864},
abstract = {Differential pulse (DP) and current sampled (TAST) polarography were applied for measuring hydrogen peroxide in actual washing systems. In addition to the possibility of the hydrogen peroxide determination in commercial detergent species containing sodium perborate monohydrate as bleaching substance, the change in peroxide concentration can be followed under the conditions which usually exist in the washing process. The possibility of determining dissolved oxygen in the peroxide decomposition reaction was also demonstrated.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Differential pulse (DP) and current sampled (TAST) polarography were applied for measuring hydrogen peroxide in actual washing systems. In addition to the possibility of the hydrogen peroxide determination in commercial detergent species containing sodium perborate monohydrate as bleaching substance, the change in peroxide concentration can be followed under the conditions which usually exist in the washing process. The possibility of determining dissolved oxygen in the peroxide decomposition reaction was also demonstrated.