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Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture

Grbić, Boško; Radić, Nenad; Terlecki-Baričević, Ana V.

(Elsevier, 2004)

TY  - JOUR
AU  - Grbić, Boško
AU  - Radić, Nenad
AU  - Terlecki-Baričević, Ana V.
PY  - 2004
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4077
AB  - The oxidation of n-hexane and toluene mixtures in air over Pt/Al2O3 catalysts with mean Pt crystallite sizes of 1.0 and 15.5 nm has been studied. Measurements were performed in an external recycle reactor at temperatures in the range of 120–181 °C, in a concentration range of one hydrocarbon from 500 to 10,000 ppm. The mutual inhibition of the oxidation activity of n-hexane and toluene in the mixtures was observed for both Pt crystallite sizes. The structure sensitivity previously established for the oxidation of single components remains valid for their mixture. The mixture model oxidation based on a Mars van Krevelen mechanism fits very well experimental data at lower temperatures (for n-hexane: 148–160 °C; for toluene: 120–140 °C), whereas at higher temperatures the model predicts higher values for catalysts with both Pt crystallite sizes. The mixture model based on equilibrium adsorption of hydrocarbons and strong adsorption of oxygen fits exceptionally well experimental data in the whole investigated temperature range. For catalysts with a mean Pt crystallite size of 1.0 nm the evaluated ratio of adsorption coefficients of n-hexane and toluene is 9, and for the catalysts with a mean Pt crystallite size of 15.5 nm the ratio is 0.13. The evaluated ratios of adsorption coefficients point out that n-hexane is more strongly bound than toluene for catalysts with smaller Pt crystallites, while at larger Pt crystallites toluene is more strongly adsorbed than n-hexane.
PB  - Elsevier
T2  - Applied Catalysis B - Environmental
T1  - Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture
VL  - 50
IS  - 3
SP  - 161
EP  - 166
DO  - 10.1016/j.apcatb.2004.01.012
ER  - 
@article{
author = "Grbić, Boško and Radić, Nenad and Terlecki-Baričević, Ana V.",
year = "2004",
abstract = "The oxidation of n-hexane and toluene mixtures in air over Pt/Al2O3 catalysts with mean Pt crystallite sizes of 1.0 and 15.5 nm has been studied. Measurements were performed in an external recycle reactor at temperatures in the range of 120–181 °C, in a concentration range of one hydrocarbon from 500 to 10,000 ppm. The mutual inhibition of the oxidation activity of n-hexane and toluene in the mixtures was observed for both Pt crystallite sizes. The structure sensitivity previously established for the oxidation of single components remains valid for their mixture. The mixture model oxidation based on a Mars van Krevelen mechanism fits very well experimental data at lower temperatures (for n-hexane: 148–160 °C; for toluene: 120–140 °C), whereas at higher temperatures the model predicts higher values for catalysts with both Pt crystallite sizes. The mixture model based on equilibrium adsorption of hydrocarbons and strong adsorption of oxygen fits exceptionally well experimental data in the whole investigated temperature range. For catalysts with a mean Pt crystallite size of 1.0 nm the evaluated ratio of adsorption coefficients of n-hexane and toluene is 9, and for the catalysts with a mean Pt crystallite size of 15.5 nm the ratio is 0.13. The evaluated ratios of adsorption coefficients point out that n-hexane is more strongly bound than toluene for catalysts with smaller Pt crystallites, while at larger Pt crystallites toluene is more strongly adsorbed than n-hexane.",
publisher = "Elsevier",
journal = "Applied Catalysis B - Environmental",
title = "Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture",
volume = "50",
number = "3",
pages = "161-166",
doi = "10.1016/j.apcatb.2004.01.012"
}
Grbić, B., Radić, N.,& Terlecki-Baričević, A. V.. (2004). Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture. in Applied Catalysis B - Environmental
Elsevier., 50(3), 161-166.
https://doi.org/10.1016/j.apcatb.2004.01.012
Grbić B, Radić N, Terlecki-Baričević AV. Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture. in Applied Catalysis B - Environmental. 2004;50(3):161-166.
doi:10.1016/j.apcatb.2004.01.012 .
Grbić, Boško, Radić, Nenad, Terlecki-Baričević, Ana V., "Kinetics of deep oxidation of n-hexane and toluene over Pt/Al2O3 catalysts Oxidation of mixture" in Applied Catalysis B - Environmental, 50, no. 3 (2004):161-166,
https://doi.org/10.1016/j.apcatb.2004.01.012 . .
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Dithiophenes and other constituents of roots of Centaurea nicolai

Tešević, Vele; Milosavljević, Slobodan; Vajs, Vlatka; Janaćković, Peđa T.; Popsavin, M

(Oxford : Pergamon-Elsevier Science Ltd, 2003)

TY  - JOUR
AU  - Tešević, Vele
AU  - Milosavljević, Slobodan
AU  - Vajs, Vlatka
AU  - Janaćković, Peđa T.
AU  - Popsavin, M
PY  - 2003
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4153
AB  - Centaurea nicolai Bald. is an endemic species found in the Mediterranean part of Montenegro, and in Albania. Roots of C. nicolai were collected on the south slopes of mountain Rumija on the Adriatic coast of Montenegro.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - Biochemical Systematics and Ecology
T1  - Dithiophenes and other constituents of roots of Centaurea nicolai
VL  - 31
IS  - 1
SP  - 89
EP  - 90
DO  - 10.1016/S0305-1978(02)00067-4
ER  - 
@article{
author = "Tešević, Vele and Milosavljević, Slobodan and Vajs, Vlatka and Janaćković, Peđa T. and Popsavin, M",
year = "2003",
abstract = "Centaurea nicolai Bald. is an endemic species found in the Mediterranean part of Montenegro, and in Albania. Roots of C. nicolai were collected on the south slopes of mountain Rumija on the Adriatic coast of Montenegro.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "Biochemical Systematics and Ecology",
title = "Dithiophenes and other constituents of roots of Centaurea nicolai",
volume = "31",
number = "1",
pages = "89-90",
doi = "10.1016/S0305-1978(02)00067-4"
}
Tešević, V., Milosavljević, S., Vajs, V., Janaćković, P. T.,& Popsavin, M.. (2003). Dithiophenes and other constituents of roots of Centaurea nicolai. in Biochemical Systematics and Ecology
Oxford : Pergamon-Elsevier Science Ltd., 31(1), 89-90.
https://doi.org/10.1016/S0305-1978(02)00067-4
Tešević V, Milosavljević S, Vajs V, Janaćković PT, Popsavin M. Dithiophenes and other constituents of roots of Centaurea nicolai. in Biochemical Systematics and Ecology. 2003;31(1):89-90.
doi:10.1016/S0305-1978(02)00067-4 .
Tešević, Vele, Milosavljević, Slobodan, Vajs, Vlatka, Janaćković, Peđa T., Popsavin, M, "Dithiophenes and other constituents of roots of Centaurea nicolai" in Biochemical Systematics and Ecology, 31, no. 1 (2003):89-90,
https://doi.org/10.1016/S0305-1978(02)00067-4 . .
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The influence of the sintering regime on the stability of the SmCo5 phase

Talijan, Nadežda M.; Milutinović Nikolić, Aleksandra; Jančić, Radmila; Petrović Prelević, Irena; Stajić-Trošić, Jasna

(Elsevier, 1997)

TY  - JOUR
AU  - Talijan, Nadežda M.
AU  - Milutinović Nikolić, Aleksandra
AU  - Jančić, Radmila
AU  - Petrović Prelević, Irena
AU  - Stajić-Trošić, Jasna
PY  - 1997
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3452
AB  - The purpose of this investigation was to establish the correlation between the sintering conditions (temperature and time) and the stability of the SmCo5 phase, expressed by the intensity of its most important diffraction peak. The sintering and heat treatment was performed under a vacuum of 150 Pa. Sintering was investigated in the temperature interval from 1100 to 1180 °C, for sintering times of 30, 45 and 60 min, while the temperature and duration of the heat treatment were kept constant. The content of the SmCo5 phase, as the carrier of the magnetic properties, was observed by X-ray diffraction analysis of the polycrystalline specimens. It was established that there is a dependence of the intensity of the diffraction peak, which corresponds to the (111) plane of the SmCo5 phase, on the sintering time and temperature. A regression model was obtained that showed the intensity of the diffraction peak to be dependent upon squares of both the sintering time and temperature.
PB  - Elsevier
T2  - Materials Letters
T1  - The influence of the sintering regime on the stability of the SmCo5 phase
VL  - 32
SP  - 85
EP  - 89
DO  - 10.1016/S0167-577X(97)00017-7
ER  - 
@article{
author = "Talijan, Nadežda M. and Milutinović Nikolić, Aleksandra and Jančić, Radmila and Petrović Prelević, Irena and Stajić-Trošić, Jasna",
year = "1997",
abstract = "The purpose of this investigation was to establish the correlation between the sintering conditions (temperature and time) and the stability of the SmCo5 phase, expressed by the intensity of its most important diffraction peak. The sintering and heat treatment was performed under a vacuum of 150 Pa. Sintering was investigated in the temperature interval from 1100 to 1180 °C, for sintering times of 30, 45 and 60 min, while the temperature and duration of the heat treatment were kept constant. The content of the SmCo5 phase, as the carrier of the magnetic properties, was observed by X-ray diffraction analysis of the polycrystalline specimens. It was established that there is a dependence of the intensity of the diffraction peak, which corresponds to the (111) plane of the SmCo5 phase, on the sintering time and temperature. A regression model was obtained that showed the intensity of the diffraction peak to be dependent upon squares of both the sintering time and temperature.",
publisher = "Elsevier",
journal = "Materials Letters",
title = "The influence of the sintering regime on the stability of the SmCo5 phase",
volume = "32",
pages = "85-89",
doi = "10.1016/S0167-577X(97)00017-7"
}
Talijan, N. M., Milutinović Nikolić, A., Jančić, R., Petrović Prelević, I.,& Stajić-Trošić, J.. (1997). The influence of the sintering regime on the stability of the SmCo5 phase. in Materials Letters
Elsevier., 32, 85-89.
https://doi.org/10.1016/S0167-577X(97)00017-7
Talijan NM, Milutinović Nikolić A, Jančić R, Petrović Prelević I, Stajić-Trošić J. The influence of the sintering regime on the stability of the SmCo5 phase. in Materials Letters. 1997;32:85-89.
doi:10.1016/S0167-577X(97)00017-7 .
Talijan, Nadežda M., Milutinović Nikolić, Aleksandra, Jančić, Radmila, Petrović Prelević, Irena, Stajić-Trošić, Jasna, "The influence of the sintering regime on the stability of the SmCo5 phase" in Materials Letters, 32 (1997):85-89,
https://doi.org/10.1016/S0167-577X(97)00017-7 . .
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Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands

Dukić, Slađana; Kostić Rajačić, Slađana; Dragović, D; Šoškić, Vukić; Joksimović, J

(Blackwell Publishing Ltd, 1997)

TY  - JOUR
AU  - Dukić, Slađana
AU  - Kostić Rajačić, Slađana
AU  - Dragović, D
AU  - Šoškić, Vukić
AU  - Joksimović, J
PY  - 1997
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2831
AB  - Twenty-two different compounds have been synthesized with the aim of creating new, mixed D2/5HT(1A) ligands. For this purpose l-substituted phenylpiperazines attached by the N-4 nitrogen to dopaminergic pharmacophores of the 2-(5-benzimidazole)ethyl-, 2-(5-benztriazole)ethyl-, 2-[5-(benzimidazole-2thione)]ethyl- and 2-[6-(1,4-dihydroquinoxaline-2,3-dione)]ethyl-type were selected according to known structure affinity requirements of l-arylpiperazines. All the new compounds were evaluated for in-vitro binding affinity at the dopamine (D1 and D2) and 5-HT(1A) receptors. Synaptosomal membranes prepared from fresh bovine caudate nuclei and hippocampi were used as a source of dopamine and 5-hydroxytryptamine receptors, respectively. [3H]SCH 23390 (D1 selective), [3H]spiperone (D2 selective) and 8-OH-[3H]DPAT (5-HT(1A) selective) were employed as the radio-ligands. None of the compounds expressed affinity for binding at D1 dopamine receptors. Compounds 3b and 4b were inactive 8-OH-[3H]DPAT competitors whereas 1b, 2b and 4b were inactive in the [3H] spiperone-binding assay. The other compounds tested showed fair (1c, 1e, 1f, 2c, 2f, 3b, 3c and 4c) to high (1a, 1d, 2a, 1d, 3a, 3d-3f, 4a, and 4d) affinity in the [3H]spiperone-binding assay, the most potent representative being 4-[2-(5-benzimidazole-2-thione)ethyl]1-(2-methoxyphenyl)piperazine, 3a (K(i)=1.7 nM). In the 8-OH-[3H]DPAT-displacement assay compounds 1b, 1d, 1f, 2b, 2f and 3f behaved as moderate competitors and 1a, 1c, 1e, 2a, 2c, 2d, 3a, 3c-3e, 4a, 4c, 4d and 4f as rather strong competitors; 4-[2-(5-benztriazole)ethyl]-1-(2-methoxyphenyl)piperazine, 2a had the highest binding affinity at the 5-HT(1A) receptors (K(i) = 2.6 nM). Because many antipsychotic and anxiolytic agents behave as mixed dopaminergic and serotonergic ligands, the high affinity of several of these new ligands for binding at both D2 and 5-HT(1A) receptors make them promising candidates deserving further pharmacological evaluation as antipsychotic or anxiolytic pharmaceuticals.
PB  - Blackwell Publishing Ltd
T2  - Journal of Pharmacy and Pharmacology
T1  - Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands
VL  - 49
IS  - 10
SP  - 1036
EP  - 1041
DO  - 10.1111/j.2042-7158.1997.tb06037.x
ER  - 
@article{
author = "Dukić, Slađana and Kostić Rajačić, Slađana and Dragović, D and Šoškić, Vukić and Joksimović, J",
year = "1997",
abstract = "Twenty-two different compounds have been synthesized with the aim of creating new, mixed D2/5HT(1A) ligands. For this purpose l-substituted phenylpiperazines attached by the N-4 nitrogen to dopaminergic pharmacophores of the 2-(5-benzimidazole)ethyl-, 2-(5-benztriazole)ethyl-, 2-[5-(benzimidazole-2thione)]ethyl- and 2-[6-(1,4-dihydroquinoxaline-2,3-dione)]ethyl-type were selected according to known structure affinity requirements of l-arylpiperazines. All the new compounds were evaluated for in-vitro binding affinity at the dopamine (D1 and D2) and 5-HT(1A) receptors. Synaptosomal membranes prepared from fresh bovine caudate nuclei and hippocampi were used as a source of dopamine and 5-hydroxytryptamine receptors, respectively. [3H]SCH 23390 (D1 selective), [3H]spiperone (D2 selective) and 8-OH-[3H]DPAT (5-HT(1A) selective) were employed as the radio-ligands. None of the compounds expressed affinity for binding at D1 dopamine receptors. Compounds 3b and 4b were inactive 8-OH-[3H]DPAT competitors whereas 1b, 2b and 4b were inactive in the [3H] spiperone-binding assay. The other compounds tested showed fair (1c, 1e, 1f, 2c, 2f, 3b, 3c and 4c) to high (1a, 1d, 2a, 1d, 3a, 3d-3f, 4a, and 4d) affinity in the [3H]spiperone-binding assay, the most potent representative being 4-[2-(5-benzimidazole-2-thione)ethyl]1-(2-methoxyphenyl)piperazine, 3a (K(i)=1.7 nM). In the 8-OH-[3H]DPAT-displacement assay compounds 1b, 1d, 1f, 2b, 2f and 3f behaved as moderate competitors and 1a, 1c, 1e, 2a, 2c, 2d, 3a, 3c-3e, 4a, 4c, 4d and 4f as rather strong competitors; 4-[2-(5-benztriazole)ethyl]-1-(2-methoxyphenyl)piperazine, 2a had the highest binding affinity at the 5-HT(1A) receptors (K(i) = 2.6 nM). Because many antipsychotic and anxiolytic agents behave as mixed dopaminergic and serotonergic ligands, the high affinity of several of these new ligands for binding at both D2 and 5-HT(1A) receptors make them promising candidates deserving further pharmacological evaluation as antipsychotic or anxiolytic pharmaceuticals.",
publisher = "Blackwell Publishing Ltd",
journal = "Journal of Pharmacy and Pharmacology",
title = "Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands",
volume = "49",
number = "10",
pages = "1036-1041",
doi = "10.1111/j.2042-7158.1997.tb06037.x"
}
Dukić, S., Kostić Rajačić, S., Dragović, D., Šoškić, V.,& Joksimović, J.. (1997). Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands. in Journal of Pharmacy and Pharmacology
Blackwell Publishing Ltd., 49(10), 1036-1041.
https://doi.org/10.1111/j.2042-7158.1997.tb06037.x
Dukić S, Kostić Rajačić S, Dragović D, Šoškić V, Joksimović J. Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands. in Journal of Pharmacy and Pharmacology. 1997;49(10):1036-1041.
doi:10.1111/j.2042-7158.1997.tb06037.x .
Dukić, Slađana, Kostić Rajačić, Slađana, Dragović, D, Šoškić, Vukić, Joksimović, J, "Synthesis of several substituted phenylpiperazines behaving as mixed D2/5HT(1A) ligands" in Journal of Pharmacy and Pharmacology, 49, no. 10 (1997):1036-1041,
https://doi.org/10.1111/j.2042-7158.1997.tb06037.x . .
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