TY  - JOUR
AU  - Radetić, Tamara
AU  - Popović, Miljana
AU  - Romhanji, Endre
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2210
AB  - The microstructure evolution of the industrially cast AA5083 modified aluminum alloy during the multistage homogenization treatment was investigated by means of optical, SEM and TEM imaging and microanalysis techniques. The effect of microsegregations on the precipitates structure was evaluated. Eutectic constituent Al-6(Fe,Mn) and Mg2Si particles form in interdendritic regions, while nu-Al-11(Mn,Cr)(4) dispersoids were observed in the dendrite cores. Homogenization treatments lead to a partial dissolution of the precipitates present in the as-cast state and formation of the new phases: rod-shaped Al-6(Mn,Fe) and Al18Mg3(Mn,Cr)(2) dispersoids in the dendrite cores. Published by Elsevier Inc.
PB  - Elsevier Science Inc, New York
T2  - Materials Characterization
T1  - Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment
EP  - 27
SP  - 16
VL  - 65
DO  - 10.1016/j.matchar.2011.12.006
ER  - 

@article{
author = "Radetić, Tamara and Popović, Miljana and Romhanji, Endre",
year = "2012",
abstract = "The microstructure evolution of the industrially cast AA5083 modified aluminum alloy during the multistage homogenization treatment was investigated by means of optical, SEM and TEM imaging and microanalysis techniques. The effect of microsegregations on the precipitates structure was evaluated. Eutectic constituent Al-6(Fe,Mn) and Mg2Si particles form in interdendritic regions, while nu-Al-11(Mn,Cr)(4) dispersoids were observed in the dendrite cores. Homogenization treatments lead to a partial dissolution of the precipitates present in the as-cast state and formation of the new phases: rod-shaped Al-6(Mn,Fe) and Al18Mg3(Mn,Cr)(2) dispersoids in the dendrite cores. Published by Elsevier Inc.",
publisher = "Elsevier Science Inc, New York",
journal = "Materials Characterization",
title = "Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment",
pages = "27-16",
volume = "65",
doi = "10.1016/j.matchar.2011.12.006"
}

Radetić, T., Popović, M.,& Romhanji, E.. (2012). Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment. in Materials Characterization
Elsevier Science Inc, New York., 65, 16-27.
https://doi.org/10.1016/j.matchar.2011.12.006

Radetić T, Popović M, Romhanji E. Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment. in Materials Characterization. 2012;65:16-27.
doi:10.1016/j.matchar.2011.12.006 .

Radetić, Tamara, Popović, Miljana, Romhanji, Endre, "Microstructure evolution of a modified AA5083 aluminum alloy during a multistage homogenization treatment" in Materials Characterization, 65 (2012):16-27,
https://doi.org/10.1016/j.matchar.2011.12.006 . .

TY  - JOUR
AU  - Prodanović, Olivera
AU  - Prokopijević, Miloš
AU  - Spasojević, Dragica
AU  - Stojanović, Željko
AU  - Radotić, Ksenija
AU  - Knežević-Jugović, Zorica
AU  - Prodanović, Radivoje
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2187
AB  - A macroporous copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate, poly(GMA-co-EGDMA), with various surface characteristics and mean pore size diameters ranging from 44 to 200 nm was synthesized, modified with 1,2-diaminoethane, and tested as a carrier for immobilization of horseradish peroxidase (HRP) by two covalent methods, glutaraldehyde and periodate. The highest specific activity of around 35 U g(-1) dry weight of carrier was achieved on poly(GMA-co-EGDMA) copolymers with mean pore diameters of 200 and 120 nm by the periodate method. A study of deactivation kinetics at 65 A degrees C and in 80 % dioxane revealed that periodate immobilization also produced an appreciable stabilization of the biocatalyst, while stabilization factor depended strongly on the surface characteristics of the copolymers. HRP immobilized on copolymer with a mean pore diameter of 120 nm by periodate method showing not only the highest specific activity but also good stability was further characterized. It appeared that the immobilization resulted in the stabilization of enzyme over a broader pH range while the Michaelis constant value (K (m)) of the immobilized HRP was 10.8 mM, approximately 5.6 times higher than that of the free enzyme. After 6 cycles of repeated use in a batch reactor for pyrogallol oxidation, the immobilized HRP retained 45 % of its original activity.
PB  - Springer, New York
T2  - Applied Biochemistry and Biotechnology
T1  - Improved Covalent Immobilization of Horseradish Peroxidase on Macroporous Glycidyl Methacrylate-Based Copolymers
EP  - 1301
IS  - 5
SP  - 1288
VL  - 168
DO  - 10.1007/s12010-012-9857-7
ER  - 

@article{
author = "Prodanović, Olivera and Prokopijević, Miloš and Spasojević, Dragica and Stojanović, Željko and Radotić, Ksenija and Knežević-Jugović, Zorica and Prodanović, Radivoje",
year = "2012",
abstract = "A macroporous copolymer of glycidyl methacrylate and ethylene glycol dimethacrylate, poly(GMA-co-EGDMA), with various surface characteristics and mean pore size diameters ranging from 44 to 200 nm was synthesized, modified with 1,2-diaminoethane, and tested as a carrier for immobilization of horseradish peroxidase (HRP) by two covalent methods, glutaraldehyde and periodate. The highest specific activity of around 35 U g(-1) dry weight of carrier was achieved on poly(GMA-co-EGDMA) copolymers with mean pore diameters of 200 and 120 nm by the periodate method. A study of deactivation kinetics at 65 A degrees C and in 80 % dioxane revealed that periodate immobilization also produced an appreciable stabilization of the biocatalyst, while stabilization factor depended strongly on the surface characteristics of the copolymers. HRP immobilized on copolymer with a mean pore diameter of 120 nm by periodate method showing not only the highest specific activity but also good stability was further characterized. It appeared that the immobilization resulted in the stabilization of enzyme over a broader pH range while the Michaelis constant value (K (m)) of the immobilized HRP was 10.8 mM, approximately 5.6 times higher than that of the free enzyme. After 6 cycles of repeated use in a batch reactor for pyrogallol oxidation, the immobilized HRP retained 45 % of its original activity.",
publisher = "Springer, New York",
journal = "Applied Biochemistry and Biotechnology",
title = "Improved Covalent Immobilization of Horseradish Peroxidase on Macroporous Glycidyl Methacrylate-Based Copolymers",
pages = "1301-1288",
number = "5",
volume = "168",
doi = "10.1007/s12010-012-9857-7"
}

Prodanović, O., Prokopijević, M., Spasojević, D., Stojanović, Ž., Radotić, K., Knežević-Jugović, Z.,& Prodanović, R.. (2012). Improved Covalent Immobilization of Horseradish Peroxidase on Macroporous Glycidyl Methacrylate-Based Copolymers. in Applied Biochemistry and Biotechnology
Springer, New York., 168(5), 1288-1301.
https://doi.org/10.1007/s12010-012-9857-7

Prodanović O, Prokopijević M, Spasojević D, Stojanović Ž, Radotić K, Knežević-Jugović Z, Prodanović R. Improved Covalent Immobilization of Horseradish Peroxidase on Macroporous Glycidyl Methacrylate-Based Copolymers. in Applied Biochemistry and Biotechnology. 2012;168(5):1288-1301.
doi:10.1007/s12010-012-9857-7 .

Prodanović, Olivera, Prokopijević, Miloš, Spasojević, Dragica, Stojanović, Željko, Radotić, Ksenija, Knežević-Jugović, Zorica, Prodanović, Radivoje, "Improved Covalent Immobilization of Horseradish Peroxidase on Macroporous Glycidyl Methacrylate-Based Copolymers" in Applied Biochemistry and Biotechnology, 168, no. 5 (2012):1288-1301,
https://doi.org/10.1007/s12010-012-9857-7 . .

TY  - JOUR
AU  - Stijepović, Vladimir
AU  - Linke, Patrick
AU  - Alnouri, Sabla
AU  - Kijevčanin, Mirjana
AU  - Grujić, Aleksandar
AU  - Stijepović, Mirko
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2105
AB  - Environmental regulations imposed on transport fuels, especially specifications on sulfur and nitrogen content, generally boost hydrogen requirements in refining industries. The catalytic naphtha reformer (CNR) process is one of the major sources of hydrogen in naphtha refinery, thus improving its hydrogen production would be of great importance for refining industries. Close examination of the reaction kinetics of CNR processes has identified temperature, hydrogen concentration and catalyst activity as key variables affecting the process's performance. In this paper, a new reactor concept is developed that better exploits these process variables. The proposed membrane moving-bed reactor promises to significantly outperform the conventional continuous catalyst regenerative (CCR) design. A case study identifies improvements of 23.6 mol% in hydrogen production, 18.8 mol% in aromatics production. Moreover, the reformate yield was found to increase by 10.6 wt%, while the production of light gases decreases to a value of 18.6 wt%.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - International Journal of Hydrogen Energy
T1  - Toward enhanced hydrogen production in a catalytic naphtha reforming process
EP  - 11784
IS  - 16
SP  - 11772
VL  - 37
DO  - 10.1016/j.ijhydene.2012.05.103
ER  - 

@article{
author = "Stijepović, Vladimir and Linke, Patrick and Alnouri, Sabla and Kijevčanin, Mirjana and Grujić, Aleksandar and Stijepović, Mirko",
year = "2012",
abstract = "Environmental regulations imposed on transport fuels, especially specifications on sulfur and nitrogen content, generally boost hydrogen requirements in refining industries. The catalytic naphtha reformer (CNR) process is one of the major sources of hydrogen in naphtha refinery, thus improving its hydrogen production would be of great importance for refining industries. Close examination of the reaction kinetics of CNR processes has identified temperature, hydrogen concentration and catalyst activity as key variables affecting the process's performance. In this paper, a new reactor concept is developed that better exploits these process variables. The proposed membrane moving-bed reactor promises to significantly outperform the conventional continuous catalyst regenerative (CCR) design. A case study identifies improvements of 23.6 mol% in hydrogen production, 18.8 mol% in aromatics production. Moreover, the reformate yield was found to increase by 10.6 wt%, while the production of light gases decreases to a value of 18.6 wt%.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "International Journal of Hydrogen Energy",
title = "Toward enhanced hydrogen production in a catalytic naphtha reforming process",
pages = "11784-11772",
number = "16",
volume = "37",
doi = "10.1016/j.ijhydene.2012.05.103"
}

Stijepović, V., Linke, P., Alnouri, S., Kijevčanin, M., Grujić, A.,& Stijepović, M.. (2012). Toward enhanced hydrogen production in a catalytic naphtha reforming process. in International Journal of Hydrogen Energy
Pergamon-Elsevier Science Ltd, Oxford., 37(16), 11772-11784.
https://doi.org/10.1016/j.ijhydene.2012.05.103

Stijepović V, Linke P, Alnouri S, Kijevčanin M, Grujić A, Stijepović M. Toward enhanced hydrogen production in a catalytic naphtha reforming process. in International Journal of Hydrogen Energy. 2012;37(16):11772-11784.
doi:10.1016/j.ijhydene.2012.05.103 .

Stijepović, Vladimir, Linke, Patrick, Alnouri, Sabla, Kijevčanin, Mirjana, Grujić, Aleksandar, Stijepović, Mirko, "Toward enhanced hydrogen production in a catalytic naphtha reforming process" in International Journal of Hydrogen Energy, 37, no. 16 (2012):11772-11784,
https://doi.org/10.1016/j.ijhydene.2012.05.103 . .