TY  - CONF
AU  - Božić, Katarina
AU  - Pavlović, Miroslav
AU  - Gjumišev, Đorđe
AU  - Veljović, Đorđe
AU  - Pantović Pavlović, Marijana
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6506
AB  - This study focused on investigating the effects of voltage and deposition time on the formation and morphology of hydroxyapatite/titanium oxide coatings, which were obtained using an in-situ synthesis process. The coatings were prepared under various voltage conditions and deposition times to analyze their characteristics. To evaluate the morphology of the coatings, optical microscopy and field emission scanning electron microscopy (FE-SEM) techniques were employed. Additionally, Fourier transform infrared spectroscopy (FTIR) was utilized to confirm the presence of hydroxyapatite coatings on the substrate. The results revealed that an increase in voltage led to a more uniform coating. The voltage parameter had a significant impact on the morphology of the initial hydroxyapatite powder, causing the agglomerates to disperse and resulting in smaller particle sizes within the coating. Furthermore, the FTIR analysis provided solid evidence of the presence of hydroxyapatite within the obtained coatings. These findings emphasize the importance of voltage control and deposition time in the in-situ synthesis process for achieving desirable hydroxyapatite/titanium oxide coatings. Understanding the influence of these parameters on coating formation and morphology can contribute to the development of improved techniques for biomedical applications, such as enhanced osseointegration in orthopedic and dental implants.
PB  - Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM
C3  - Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
T1  - The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings
SP  - 95
EP  - 95
UR  - https://hdl.handle.net/21.15107/rcub_cer_6506
ER  - 

@conference{
author = "Božić, Katarina and Pavlović, Miroslav and Gjumišev, Đorđe and Veljović, Đorđe and Pantović Pavlović, Marijana",
year = "2023",
abstract = "This study focused on investigating the effects of voltage and deposition time on the formation and morphology of hydroxyapatite/titanium oxide coatings, which were obtained using an in-situ synthesis process. The coatings were prepared under various voltage conditions and deposition times to analyze their characteristics. To evaluate the morphology of the coatings, optical microscopy and field emission scanning electron microscopy (FE-SEM) techniques were employed. Additionally, Fourier transform infrared spectroscopy (FTIR) was utilized to confirm the presence of hydroxyapatite coatings on the substrate. The results revealed that an increase in voltage led to a more uniform coating. The voltage parameter had a significant impact on the morphology of the initial hydroxyapatite powder, causing the agglomerates to disperse and resulting in smaller particle sizes within the coating. Furthermore, the FTIR analysis provided solid evidence of the presence of hydroxyapatite within the obtained coatings. These findings emphasize the importance of voltage control and deposition time in the in-situ synthesis process for achieving desirable hydroxyapatite/titanium oxide coatings. Understanding the influence of these parameters on coating formation and morphology can contribute to the development of improved techniques for biomedical applications, such as enhanced osseointegration in orthopedic and dental implants.",
publisher = "Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM",
journal = "Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia",
title = "The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings",
pages = "95-95",
url = "https://hdl.handle.net/21.15107/rcub_cer_6506"
}

Božić, K., Pavlović, M., Gjumišev, Đ., Veljović, Đ.,& Pantović Pavlović, M.. (2023). The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia
Belgrade : Serbian Society of Corrosion and Materials Protection UISKOZAM / Beograd : Udruženje inženjera Srbije za koroziju i zaštitu materijala UISKOZAM., 95-95.
https://hdl.handle.net/21.15107/rcub_cer_6506

Božić K, Pavlović M, Gjumišev Đ, Veljović Đ, Pantović Pavlović M. The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings. in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia. 2023;:95-95.
https://hdl.handle.net/21.15107/rcub_cer_6506 .

Božić, Katarina, Pavlović, Miroslav, Gjumišev, Đorđe, Veljović, Đorđe, Pantović Pavlović, Marijana, "The influence of the voltage on formation and morphology of hydroxyapatite/titanium composite coatings" in Proceedings - XXIV YuCorr International Conference, Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection, May 28-31, 2023, Divčibare, Serbia (2023):95-95,
https://hdl.handle.net/21.15107/rcub_cer_6506 .

TY  - JOUR
AU  - Petrović, Rada
AU  - Lazarević, Slavica
AU  - Janković-Častvan, Ivona
AU  - Matić, Tamara
AU  - Milivojević, Marija
AU  - Milošević, Dragana
AU  - Veljović, Đorđe
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5400
AB  - Kaolinite/illite (KUb) and sepiolite (SEP) clays were used to study Cr(III) adsorption removal from aqueous solutions so that they could be utilized after saturation for ceramic manufacturing. SEP had a larger specific surface area and a higher PZC than KUb. The removal of Cr(III) was evaluated using a batch equilibration procedure at pHi = 4 and pHi = 6. Fast removal kinetics were observed for both clays. Maximum removal capacity was determined by changing the concentration of Cr(III) while keeping the concentration of clay constant and by altering the amount of clay while keeping the concentration of Cr(III) constant. In all situations, SEP had greater capacity than KUb, and capacity was greater for both clays at higher pHi. Not only did the pHi impact the removal capacity and efficiency, but so did the pH during adsorption and the initial concentration of Cr(III). Because of the higher PZC, the pHf for SEP was higher for the same pHi. The higher the pH and Cr(III) concentration, the higher the probability of Cr(OH)3 precipitation and the higher the removal capacity. Dried saturated clays were uniaxially pressed and sintered at 1000 °C for 2 h. The densities of the sintered materials were nearly identical to those of pure clay-based materials, but the compressive strengths were higher, which is significant for the use of saturated clays as raw materials in ceramic manufacturing. Leaching of Cr from SEP-based material was significantly higher than from KUb-based material probably due to the presence of CaCO3 in the SEP.
PB  - Elsevier
T2  - Applied  Clay Sciences
T1  - Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing
VL  - 231
SP  - 106747
DO  - 10.1016/j.clay.2022.106747
ER  - 

@article{
author = "Petrović, Rada and Lazarević, Slavica and Janković-Častvan, Ivona and Matić, Tamara and Milivojević, Marija and Milošević, Dragana and Veljović, Đorđe",
year = "2023",
abstract = "Kaolinite/illite (KUb) and sepiolite (SEP) clays were used to study Cr(III) adsorption removal from aqueous solutions so that they could be utilized after saturation for ceramic manufacturing. SEP had a larger specific surface area and a higher PZC than KUb. The removal of Cr(III) was evaluated using a batch equilibration procedure at pHi = 4 and pHi = 6. Fast removal kinetics were observed for both clays. Maximum removal capacity was determined by changing the concentration of Cr(III) while keeping the concentration of clay constant and by altering the amount of clay while keeping the concentration of Cr(III) constant. In all situations, SEP had greater capacity than KUb, and capacity was greater for both clays at higher pHi. Not only did the pHi impact the removal capacity and efficiency, but so did the pH during adsorption and the initial concentration of Cr(III). Because of the higher PZC, the pHf for SEP was higher for the same pHi. The higher the pH and Cr(III) concentration, the higher the probability of Cr(OH)3 precipitation and the higher the removal capacity. Dried saturated clays were uniaxially pressed and sintered at 1000 °C for 2 h. The densities of the sintered materials were nearly identical to those of pure clay-based materials, but the compressive strengths were higher, which is significant for the use of saturated clays as raw materials in ceramic manufacturing. Leaching of Cr from SEP-based material was significantly higher than from KUb-based material probably due to the presence of CaCO3 in the SEP.",
publisher = "Elsevier",
journal = "Applied  Clay Sciences",
title = "Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing",
volume = "231",
pages = "106747",
doi = "10.1016/j.clay.2022.106747"
}

Petrović, R., Lazarević, S., Janković-Častvan, I., Matić, T., Milivojević, M., Milošević, D.,& Veljović, Đ.. (2023). Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing. in Applied  Clay Sciences
Elsevier., 231, 106747.
https://doi.org/10.1016/j.clay.2022.106747

Petrović R, Lazarević S, Janković-Častvan I, Matić T, Milivojević M, Milošević D, Veljović Đ. Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing. in Applied  Clay Sciences. 2023;231:106747.
doi:10.1016/j.clay.2022.106747 .

Petrović, Rada, Lazarević, Slavica, Janković-Častvan, Ivona, Matić, Tamara, Milivojević, Marija, Milošević, Dragana, Veljović, Đorđe, "Removal of trivalent chromium from aqueous solutions by natural clays: Valorization of saturated adsorbents as raw materials in ceramic manufacturing" in Applied  Clay Sciences, 231 (2023):106747,
https://doi.org/10.1016/j.clay.2022.106747 . .

TY  - JOUR
AU  - Pantić, Nevena
AU  - Spasojević, Milica
AU  - Stojanović, Željko
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav
AU  - Balaž, Ana Marija
AU  - Prodanović, Radivoje
AU  - Prodanović, Olivera
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7532
AB  - Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.
PB  - Springer
T2  - Journal of Polymers and the Environment
T1  - Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol
VL  - 30
SP  - 3005
EP  - 3020
DO  - 10.1007/s10924-021-02364-3
ER  - 

@article{
author = "Pantić, Nevena and Spasojević, Milica and Stojanović, Željko and Veljović, Đorđe and Krstić, Jugoslav and Balaž, Ana Marija and Prodanović, Radivoje and Prodanović, Olivera",
year = "2022",
abstract = "Novel macroporous copolymers of glycidyl methacrylate and ethylene glycol dimethacrylate with mean pore size diameters ranging from 150 to 310 nm were synthesized by dispersion polymerization and modified with ethylenediamine. The glutaraldehyde and periodate method were employed to immobilize horseradish peroxidase (HRP) onto these carriers. The activity of the immobilized enzyme was greatly affected by the pore size of the carrier. The highest specific activities of 9.65 and 8.94 U/g of dry weight were obtained for HRP immobilized by the periodate-route onto poly(GMA‐co‐EGDMA) carriers with pore size diameters of 234 and 297 nm, respectively. Stability studies showed an improved operational stability of immobilized peroxidase at 65 °C and in an organic solvent. HRP immobilized on a copolymer with a pore size of 234 nm, showing the highest specific activity and good stability, had higher activities at almost all pH values than the native enzyme and the increased Km value for pyrogallol oxidation. Immobilized HRP retained 80% of its original activity after five consecutive cycles of the pyrogallol oxidation and 98% of its initial activity in a storage stability study. Enzyme immobilized onto the macroporous copolymer with the pore size diameter of 234 nm showed a substantial degree of phenol removal achieved by immobilized peroxidase.",
publisher = "Springer",
journal = "Journal of Polymers and the Environment",
title = "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol",
volume = "30",
pages = "3005-3020",
doi = "10.1007/s10924-021-02364-3"
}

Pantić, N., Spasojević, M., Stojanović, Ž., Veljović, Đ., Krstić, J., Balaž, A. M., Prodanović, R.,& Prodanović, O.. (2022). Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment
Springer., 30, 3005-3020.
https://doi.org/10.1007/s10924-021-02364-3

Pantić N, Spasojević M, Stojanović Ž, Veljović Đ, Krstić J, Balaž AM, Prodanović R, Prodanović O. Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol. in Journal of Polymers and the Environment. 2022;30:3005-3020.
doi:10.1007/s10924-021-02364-3 .

Pantić, Nevena, Spasojević, Milica, Stojanović, Željko, Veljović, Đorđe, Krstić, Jugoslav, Balaž, Ana Marija, Prodanović, Radivoje, Prodanović, Olivera, "Immobilization of Horseradish Peroxidase on Macroporous Glycidyl-Based Copolymers with Different Surface Characteristics for the Removal of Phenol" in Journal of Polymers and the Environment, 30 (2022):3005-3020,
https://doi.org/10.1007/s10924-021-02364-3 . .

TY  - JOUR
AU  - Miladinović, Marija M.
AU  - Krstić, Jugoslav
AU  - Zdujić, Miodrag V.
AU  - Veselinović, Ljiljana M.
AU  - Veljović, Đorđe
AU  - Banković-Ilić, Ivana B.
AU  - Stamenković, Olivera
AU  - Veljković, Vlada B.
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4868
AB  - Hazelnut shell ash was investigated as a new base catalyst for the transesterification of used cooking sunflower oil to biodiesel. To understand its catalytic properties, the prepared ash was characterized by EDX, XRD, TGA/DTA, Hg porosimetry, N2 physisorption, FE-SEM, and basic strength measurements. The effects of the catalyst loading in the range of 1–5% of the oil weight and the methanol-to-oil molar ratio of 6:1–18:1 on the kinetics of the fatty acid methyl esters synthesis were established. Moreover, the leaching and reusability of the catalyst were assessed. The obtained results revealed that hazelnut shell ash was mostly composed of K, Ca, and Mg. The highest ester content (98%) was achieved at the catalyst loading of 5%, the methanol-to-oil molar ratio of 12:1, and the reaction time of 10 min. The contribution of homogeneous catalysis because of the catalyst leaching was confirmed but did not determine the overall reaction rate. The catalyst can be reused after the recalcination at 800 °C for 2 h achieving the high methyl esters content (>96%) in 30 min after three subsequent runs. The overall reaction followed the pseudo-first-order kinetics with respect to triacylglycerols. A linear relationship between the apparent reaction rate constant and the catalyst loading and the methanol-to-oil molar ratio was determined. The determined value of the reaction rate constant was 0.0576 dm6/(min•mol2).
PB  - Elsevier
T2  - Renewable Energy
T1  - Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash
VL  - 183
SP  - 103
EP  - 113
DO  - 10.1016/j.renene.2021.10.071
ER  - 

@article{
author = "Miladinović, Marija M. and Krstić, Jugoslav and Zdujić, Miodrag V. and Veselinović, Ljiljana M. and Veljović, Đorđe and Banković-Ilić, Ivana B. and Stamenković, Olivera and Veljković, Vlada B.",
year = "2022",
abstract = "Hazelnut shell ash was investigated as a new base catalyst for the transesterification of used cooking sunflower oil to biodiesel. To understand its catalytic properties, the prepared ash was characterized by EDX, XRD, TGA/DTA, Hg porosimetry, N2 physisorption, FE-SEM, and basic strength measurements. The effects of the catalyst loading in the range of 1–5% of the oil weight and the methanol-to-oil molar ratio of 6:1–18:1 on the kinetics of the fatty acid methyl esters synthesis were established. Moreover, the leaching and reusability of the catalyst were assessed. The obtained results revealed that hazelnut shell ash was mostly composed of K, Ca, and Mg. The highest ester content (98%) was achieved at the catalyst loading of 5%, the methanol-to-oil molar ratio of 12:1, and the reaction time of 10 min. The contribution of homogeneous catalysis because of the catalyst leaching was confirmed but did not determine the overall reaction rate. The catalyst can be reused after the recalcination at 800 °C for 2 h achieving the high methyl esters content (>96%) in 30 min after three subsequent runs. The overall reaction followed the pseudo-first-order kinetics with respect to triacylglycerols. A linear relationship between the apparent reaction rate constant and the catalyst loading and the methanol-to-oil molar ratio was determined. The determined value of the reaction rate constant was 0.0576 dm6/(min•mol2).",
publisher = "Elsevier",
journal = "Renewable Energy",
title = "Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash",
volume = "183",
pages = "103-113",
doi = "10.1016/j.renene.2021.10.071"
}

Miladinović, M. M., Krstić, J., Zdujić, M. V., Veselinović, L. M., Veljović, Đ., Banković-Ilić, I. B., Stamenković, O.,& Veljković, V. B.. (2022). Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash. in Renewable Energy
Elsevier., 183, 103-113.
https://doi.org/10.1016/j.renene.2021.10.071

Miladinović MM, Krstić J, Zdujić MV, Veselinović LM, Veljović Đ, Banković-Ilić IB, Stamenković O, Veljković VB. Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash. in Renewable Energy. 2022;183:103-113.
doi:10.1016/j.renene.2021.10.071 .

Miladinović, Marija M., Krstić, Jugoslav, Zdujić, Miodrag V., Veselinović, Ljiljana M., Veljović, Đorđe, Banković-Ilić, Ivana B., Stamenković, Olivera, Veljković, Vlada B., "Transesterification of used cooking sunflower oil catalyzed by hazelnut shell ash" in Renewable Energy, 183 (2022):103-113,
https://doi.org/10.1016/j.renene.2021.10.071 . .

TY  - CONF
AU  - Božić, Katarina
AU  - Pavlović, Miroslav M.
AU  - Panić, Stefan
AU  - Veljović, Đorđe
AU  - Pantović Pavlović, Marijana
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5807
AB  - Titanium and its alloys are widely used in medical devices, orthopedic implants, dental implants, and device components of aerospace industries. It is attractive for having superior room and elevated temperature mechanical properties, corrosion resistance, fatigue resistance and low weight. However, titanium and its alloys are not fully applicable replacement in biomedical application. Suitable surface modification of titanium is needed in order to obtain Ti with improved properties. This paper deals with the optimization of the in-situ anodizing/anaphoretic electrodeposition process of hydrothermally synthesized hydroxyapatite (HAp) on Ti substrate for subsequent obtaining of HAp/TiO2 composite coatings without multi-stage pre-treatment and post-treatment of titanium and oxidized titanium surface. Coatings were prepared at constant voltage of 60 V and deposition time of 1 min. The morphology of coatings was investigated using optical microscope and field emission scanning electron microscope. Fourier transform infrared spectroscopy measurements were also performed. The coating with optimal properties was obtained by deposition from suspension containing 1.0 M NaOH.
PB  - Serbian Society of Corrosion and Materials  Protection UISKOZAM
C3  - Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XXIII YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova / Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XXIII YuCorr International Conference - proceedings [May 16-19, 2022, Divčibare, Serbia]
T1  - The optimization of hydrothermally obtained hydroxyapatite deposition process on titanium by novel in-situ process
SP  - 103
EP  - 107
UR  - https://hdl.handle.net/21.15107/rcub_cer_5807
ER  - 

@conference{
author = "Božić, Katarina and Pavlović, Miroslav M. and Panić, Stefan and Veljović, Đorđe and Pantović Pavlović, Marijana",
year = "2022",
abstract = "Titanium and its alloys are widely used in medical devices, orthopedic implants, dental implants, and device components of aerospace industries. It is attractive for having superior room and elevated temperature mechanical properties, corrosion resistance, fatigue resistance and low weight. However, titanium and its alloys are not fully applicable replacement in biomedical application. Suitable surface modification of titanium is needed in order to obtain Ti with improved properties. This paper deals with the optimization of the in-situ anodizing/anaphoretic electrodeposition process of hydrothermally synthesized hydroxyapatite (HAp) on Ti substrate for subsequent obtaining of HAp/TiO2 composite coatings without multi-stage pre-treatment and post-treatment of titanium and oxidized titanium surface. Coatings were prepared at constant voltage of 60 V and deposition time of 1 min. The morphology of coatings was investigated using optical microscope and field emission scanning electron microscope. Fourier transform infrared spectroscopy measurements were also performed. The coating with optimal properties was obtained by deposition from suspension containing 1.0 M NaOH.",
publisher = "Serbian Society of Corrosion and Materials  Protection UISKOZAM",
journal = "Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XXIII YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova / Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XXIII YuCorr International Conference - proceedings [May 16-19, 2022, Divčibare, Serbia]",
title = "The optimization of hydrothermally obtained hydroxyapatite deposition process on titanium by novel in-situ process",
pages = "103-107",
url = "https://hdl.handle.net/21.15107/rcub_cer_5807"
}

Božić, K., Pavlović, M. M., Panić, S., Veljović, Đ.,& Pantović Pavlović, M.. (2022). The optimization of hydrothermally obtained hydroxyapatite deposition process on titanium by novel in-situ process. in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XXIII YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova / Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XXIII YuCorr International Conference - proceedings [May 16-19, 2022, Divčibare, Serbia]
Serbian Society of Corrosion and Materials  Protection UISKOZAM., 103-107.
https://hdl.handle.net/21.15107/rcub_cer_5807

Božić K, Pavlović MM, Panić S, Veljović Đ, Pantović Pavlović M. The optimization of hydrothermally obtained hydroxyapatite deposition process on titanium by novel in-situ process. in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XXIII YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova / Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XXIII YuCorr International Conference - proceedings [May 16-19, 2022, Divčibare, Serbia]. 2022;:103-107.
https://hdl.handle.net/21.15107/rcub_cer_5807 .

Božić, Katarina, Pavlović, Miroslav M., Panić, Stefan, Veljović, Đorđe, Pantović Pavlović, Marijana, "The optimization of hydrothermally obtained hydroxyapatite deposition process on titanium by novel in-situ process" in Stecište nauke i prakse u oblastima korozije, zaštite materijala i životne sredine - XXIII YuCorr [Jugoslovenska korozija] Međunarodna konferencija - knjiga radova / Meeting Point of the Science and Practice in the Fields of Corrosion, Materials and Environmental Protection - XXIII YuCorr International Conference - proceedings [May 16-19, 2022, Divčibare, Serbia] (2022):103-107,
https://hdl.handle.net/21.15107/rcub_cer_5807 .

TY  - JOUR
AU  - Ugrinović, Vukašin
AU  - Panić, Vesna
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Božić, Bojan
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
AU  - Veljović, Đorđe
PY  - 2022
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5243
AB  - Hydrogels are promising materials for biomedical applications due to highly hydrated, porous, permeable structure with possibility to accommodate living cells, drugs, or bioactive factors. In this paper, we reported poly(methacrylic acid) (PMAA)/gelatin IPN hydrogels, synthesized by free-radical polymerization, with adjustable mechanical, structural, physicochemical, and biological characteristics. The influence of methacrylic acid (MAA), gelatin, and cross-linker in the precursor solution on hydrogels properties was investigated. The increasing concentration of MAA, gelatin, and cross-linker led to better mechanical properties, lower porosity, and water content. The compressive mechanical properties of hydrogels were significantly better in comparison to a single-network PMAA hydrogel, while the obtained compressive strength values up to 16 MPa were comparable with tough hydrogels. The increasing concentration of MAA and cross-linker reduced fatigue resistance and degradability, while the increase in gelatin content acted in the opposite way. Swelling tests in different pH conditions demonstrated strong pH-sensibility of the hydrogels, which was more pronounced as MAA concentration was higher, and gelatin and cross-linker concentrations were lower. In addition, the hydrogels strongly promoted the proliferation of human periodontal ligament stem cells and MRC-5 cells as assayed by MTT assay.
PB  - Wiley
T2  - Polymer Engineering and Science
T1  - Strong and tough, pH sensible, interpenetrating network hydrogels based on gelatin and poly(methacrylic acid)
VL  - 62
SP  - 622
EP  - 636
DO  - 10.1002/pen.25870
ER  - 

@article{
author = "Ugrinović, Vukašin and Panić, Vesna and Spasojević, Pavle and Šešlija, Sanja and Božić, Bojan and Petrović, Rada and Janaćković, Đorđe and Veljović, Đorđe",
year = "2022",
abstract = "Hydrogels are promising materials for biomedical applications due to highly hydrated, porous, permeable structure with possibility to accommodate living cells, drugs, or bioactive factors. In this paper, we reported poly(methacrylic acid) (PMAA)/gelatin IPN hydrogels, synthesized by free-radical polymerization, with adjustable mechanical, structural, physicochemical, and biological characteristics. The influence of methacrylic acid (MAA), gelatin, and cross-linker in the precursor solution on hydrogels properties was investigated. The increasing concentration of MAA, gelatin, and cross-linker led to better mechanical properties, lower porosity, and water content. The compressive mechanical properties of hydrogels were significantly better in comparison to a single-network PMAA hydrogel, while the obtained compressive strength values up to 16 MPa were comparable with tough hydrogels. The increasing concentration of MAA and cross-linker reduced fatigue resistance and degradability, while the increase in gelatin content acted in the opposite way. Swelling tests in different pH conditions demonstrated strong pH-sensibility of the hydrogels, which was more pronounced as MAA concentration was higher, and gelatin and cross-linker concentrations were lower. In addition, the hydrogels strongly promoted the proliferation of human periodontal ligament stem cells and MRC-5 cells as assayed by MTT assay.",
publisher = "Wiley",
journal = "Polymer Engineering and Science",
title = "Strong and tough, pH sensible, interpenetrating network hydrogels based on gelatin and poly(methacrylic acid)",
volume = "62",
pages = "622-636",
doi = "10.1002/pen.25870"
}

Ugrinović, V., Panić, V., Spasojević, P., Šešlija, S., Božić, B., Petrović, R., Janaćković, Đ.,& Veljović, Đ.. (2022). Strong and tough, pH sensible, interpenetrating network hydrogels based on gelatin and poly(methacrylic acid). in Polymer Engineering and Science
Wiley., 62, 622-636.
https://doi.org/10.1002/pen.25870

Ugrinović V, Panić V, Spasojević P, Šešlija S, Božić B, Petrović R, Janaćković Đ, Veljović Đ. Strong and tough, pH sensible, interpenetrating network hydrogels based on gelatin and poly(methacrylic acid). in Polymer Engineering and Science. 2022;62:622-636.
doi:10.1002/pen.25870 .

Ugrinović, Vukašin, Panić, Vesna, Spasojević, Pavle, Šešlija, Sanja, Božić, Bojan, Petrović, Rada, Janaćković, Đorđe, Veljović, Đorđe, "Strong and tough, pH sensible, interpenetrating network hydrogels based on gelatin and poly(methacrylic acid)" in Polymer Engineering and Science, 62 (2022):622-636,
https://doi.org/10.1002/pen.25870 . .

TY  - JOUR
AU  - Miladinović, Marija R.
AU  - Zdujić, Miodrag
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav
AU  - Banković-Ilić, Ivana B.
AU  - Veljković, Vlada B.
AU  - Stamenković, Olivera
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3217
AB  - The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.
PB  - Elsevier
T2  - Renewable Energy
T1  - Valorization of walnut shell ash as a catalyst for biodiesel production
VL  - 147
SP  - 1033
EP  - 1043
DO  - 10.1016/j.renene.2019.09.056
ER  - 

@article{
author = "Miladinović, Marija R. and Zdujić, Miodrag and Veljović, Đorđe and Krstić, Jugoslav and Banković-Ilić, Ivana B. and Veljković, Vlada B. and Stamenković, Olivera",
year = "2020",
abstract = "The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.",
publisher = "Elsevier",
journal = "Renewable Energy",
title = "Valorization of walnut shell ash as a catalyst for biodiesel production",
volume = "147",
pages = "1033-1043",
doi = "10.1016/j.renene.2019.09.056"
}

Miladinović, M. R., Zdujić, M., Veljović, Đ., Krstić, J., Banković-Ilić, I. B., Veljković, V. B.,& Stamenković, O.. (2020). Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy
Elsevier., 147, 1033-1043.
https://doi.org/10.1016/j.renene.2019.09.056

Miladinović MR, Zdujić M, Veljović Đ, Krstić J, Banković-Ilić IB, Veljković VB, Stamenković O. Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy. 2020;147:1033-1043.
doi:10.1016/j.renene.2019.09.056 .

Miladinović, Marija R., Zdujić, Miodrag, Veljović, Đorđe, Krstić, Jugoslav, Banković-Ilić, Ivana B., Veljković, Vlada B., Stamenković, Olivera, "Valorization of walnut shell ash as a catalyst for biodiesel production" in Renewable Energy, 147 (2020):1033-1043,
https://doi.org/10.1016/j.renene.2019.09.056 . .

TY  - JOUR
AU  - Miladinović, Marija R.
AU  - Zdujić, Miodrag
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav
AU  - Banković-Ilić, Ivana B.
AU  - Veljković, Vlada B.
AU  - Stamenković, Olivera
PY  - 2020
UR  - http://dais.sanu.ac.rs/123456789/6903
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3319
AB  - The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.
PB  - Elsevier
T2  - Renewable Energy
T1  - Valorization of walnut shell ash as a catalyst for biodiesel production
VL  - 147
SP  - 1033
EP  - 1043
DO  - 10.1016/j.renene.2019.09.056
ER  - 

@article{
author = "Miladinović, Marija R. and Zdujić, Miodrag and Veljović, Đorđe and Krstić, Jugoslav and Banković-Ilić, Ivana B. and Veljković, Vlada B. and Stamenković, Olivera",
year = "2020",
abstract = "The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.",
publisher = "Elsevier",
journal = "Renewable Energy",
title = "Valorization of walnut shell ash as a catalyst for biodiesel production",
volume = "147",
pages = "1033-1043",
doi = "10.1016/j.renene.2019.09.056"
}

Miladinović, M. R., Zdujić, M., Veljović, Đ., Krstić, J., Banković-Ilić, I. B., Veljković, V. B.,& Stamenković, O.. (2020). Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy
Elsevier., 147, 1033-1043.
https://doi.org/10.1016/j.renene.2019.09.056

Miladinović MR, Zdujić M, Veljović Đ, Krstić J, Banković-Ilić IB, Veljković VB, Stamenković O. Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy. 2020;147:1033-1043.
doi:10.1016/j.renene.2019.09.056 .

Miladinović, Marija R., Zdujić, Miodrag, Veljović, Đorđe, Krstić, Jugoslav, Banković-Ilić, Ivana B., Veljković, Vlada B., Stamenković, Olivera, "Valorization of walnut shell ash as a catalyst for biodiesel production" in Renewable Energy, 147 (2020):1033-1043,
https://doi.org/10.1016/j.renene.2019.09.056 . .

TY  - JOUR
AU  - Marković, Maja D.
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Popović, Ivanka G.
AU  - Veljović, Đorđe
AU  - Pjanović, Rada
AU  - Panić, Vesna
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2990
AB  - The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.
PB  - Elsevier
T2  - European Polymer Journal
T1  - Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties
VL  - 113
SP  - 276
EP  - 288
DO  - 10.1016/j.eurpolymj.2019.01.065
ER  - 

@article{
author = "Marković, Maja D. and Spasojević, Pavle and Šešlija, Sanja and Popović, Ivanka G. and Veljović, Đorđe and Pjanović, Rada and Panić, Vesna",
year = "2019",
abstract = "The design of complex polymeric materials with predefined task-specific properties meets challenging issues: to establish synthesis-structure-properties relationship, as well as to understand the arrangement and interactions of the involved components. Hybrid networks of protein (casein) and polyelectrolyte (poly(methacrylic acid)) were synthesized and their swelling, dynamic-mechanical and morphological properties were investigated as functions of the neutralization degree of methacrylic acid and the concentrations of caseinate and crosslinker. The domination of different interactions between components led to diverse forms of casein macromolecules- from micelles to unfold chains. That resulted in very different structures and thereby properties of derived hybrid networks: from porous unswellable to highly swellable and reinforced ones. A great opportunity to easily modulate the final characteristics of the reported hybrid system to fit the need of specific application just through the change of one synthesis parameter was thereby demonstrated.",
publisher = "Elsevier",
journal = "European Polymer Journal",
title = "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties",
volume = "113",
pages = "276-288",
doi = "10.1016/j.eurpolymj.2019.01.065"
}

Marković, M. D., Spasojević, P., Šešlija, S., Popović, I. G., Veljović, Đ., Pjanović, R.,& Panić, V.. (2019). Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal
Elsevier., 113, 276-288.
https://doi.org/10.1016/j.eurpolymj.2019.01.065

Marković MD, Spasojević P, Šešlija S, Popović IG, Veljović Đ, Pjanović R, Panić V. Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties. in European Polymer Journal. 2019;113:276-288.
doi:10.1016/j.eurpolymj.2019.01.065 .

Marković, Maja D., Spasojević, Pavle, Šešlija, Sanja, Popović, Ivanka G., Veljović, Đorđe, Pjanović, Rada, Panić, Vesna, "Casein-poly(methacrylic acid) hybrid soft networks with easy tunable properties" in European Polymer Journal, 113 (2019):276-288,
https://doi.org/10.1016/j.eurpolymj.2019.01.065 . .

TY  - JOUR
AU  - Ugrinović, Vukašin
AU  - Panić, Vesna
AU  - Veljović, Đorđe
AU  - Spasojević, Pavle
AU  - Šešlija, Sanja
AU  - Janaćković, Đorđe
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2279
AB  - Goals. The goal of this study was a development of biocompatible composite hydrogels, structurally similar to native bone tissue, by incorporation of ~60 wt % of calcium hydroxyapatite (HA) into a matrix of hydrogels. Also, a possibility to control swelling kinetic and equilibrium swelling degree (SDeq) of hydrogels, by altering the degree of neutralization of the precursor (DN) was examined. Methods. Composite hydrogels, based on HA and poly(methacrylic acid) (PMAA), were synthesized by free-radical polymerization with different DN. Theoretical content of HA in synthesized composites was 60 wt %. Composites were synthesized by methods of dynamic mechanical analysis and scanning electron microscopy. SDeq and swelling kinetic were examined in distilled water and simulated body fluid. Results. Morphological observations revealed uniform distribution and strong bond of spherical HA particles within the polymer matrix. Swelling analyses demonstrated that SDeq is directly proportional to DN, while rheological examinations indicated inverse proportion between DN and storage modulus, but due to the HA particles inclusion, mechanical properties of composites were significantly better compared to monophasic PMAA hydrogels. Significance. Simple method of synthesis of composite hydrogels with high content of filler nanoparticles is presented. Incorporation of HA nanoparticles significantly improved mechanical properties of hydrogels, while at the same time was demonstrated a possibility to control swelling kinetic by influencing the DN.
AB  - Ciljevi - Cilj ove studije bio je razvoj biokompatibilnih kompozitnih hidrogelova, koji su slične strukture kao prirodno koštano tkivo, inkorporacijom ∼60 mas % kalcijum-hidroksiapatita (HA) u matricu hidro-gela. Takođe, ispitan je uticaj neutralizacije prekursora polimerne mreže na kinetiku bubrenja i ravnotežni stepen bubrenja (SDeq).Metode - Kompozitni hidrogelovi, sastavljeni od HA i poli(metakrilne kiseline) (PMAA), sintetisani su slobodno-radikalskom polimerizacijom, pri različitim stepenima neutralizacije prekursora (SN). Svi sintetisani kompoziti sadrže visok maseni udeo HA (~60 mas %). Kompoziti su okarakterisani metodama skenirajuće elektronske mikroskopije (SEM) i dinamičko-mehaničke analize (DMA). SDeq i kinetika bubrenja ispitivani su u destilovanoj vodi i simuliranoj telesnoj tečnosti (SBF). Rezultati - Morfološka ispitivanja pokazala su uniformnu raspodelu i dobru povezanost sferičnih čestica apatita sa polimernom matricom. Analiza procesa bubrenja pokazala je proporcionalnu zavisnost SN i SDeq kompozita. Reološka ispitivanja ukazala su na obrnuto proporcionalnu zavisnost između SN i vrednosti modula sačuvane energije, koji su iznosili 55130 Pa u slučaju potpune neutralizacije i 77480 Pa u slučaju 0% neutralizacije. Značaj - Predstavljena je jednostavna metoda za sintezu kompozitnih hidrogelova sa visokim masenim udelom nanočestica punioca. Inkorporacijom nanočestica HA postignuto je značajno poboljšanje mehaničkih svojstava hidrogelova, dok je istovremeno pokazano da je promenom SN moguće kontrolisati kinetiku bubrenja hidrogelova. .
PB  - Beograd : Savez inženjera i tehničara Srbije
T2  - Tehnika
T1  - Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels
T1  - Uticaj neutralizacije na svojstva poroznih hidrogelova na bazi hidroksiapatita i poli(metakrilne kiseline) sintetisanih slobodno-radikalskom polimerizacijom
VL  - 73
IS  - 5
SP  - 613
EP  - 620
DO  - 10.5937/tehnika1805613U
ER  - 

@article{
author = "Ugrinović, Vukašin and Panić, Vesna and Veljović, Đorđe and Spasojević, Pavle and Šešlija, Sanja and Janaćković, Đorđe",
year = "2018",
abstract = "Goals. The goal of this study was a development of biocompatible composite hydrogels, structurally similar to native bone tissue, by incorporation of ~60 wt % of calcium hydroxyapatite (HA) into a matrix of hydrogels. Also, a possibility to control swelling kinetic and equilibrium swelling degree (SDeq) of hydrogels, by altering the degree of neutralization of the precursor (DN) was examined. Methods. Composite hydrogels, based on HA and poly(methacrylic acid) (PMAA), were synthesized by free-radical polymerization with different DN. Theoretical content of HA in synthesized composites was 60 wt %. Composites were synthesized by methods of dynamic mechanical analysis and scanning electron microscopy. SDeq and swelling kinetic were examined in distilled water and simulated body fluid. Results. Morphological observations revealed uniform distribution and strong bond of spherical HA particles within the polymer matrix. Swelling analyses demonstrated that SDeq is directly proportional to DN, while rheological examinations indicated inverse proportion between DN and storage modulus, but due to the HA particles inclusion, mechanical properties of composites were significantly better compared to monophasic PMAA hydrogels. Significance. Simple method of synthesis of composite hydrogels with high content of filler nanoparticles is presented. Incorporation of HA nanoparticles significantly improved mechanical properties of hydrogels, while at the same time was demonstrated a possibility to control swelling kinetic by influencing the DN., Ciljevi - Cilj ove studije bio je razvoj biokompatibilnih kompozitnih hidrogelova, koji su slične strukture kao prirodno koštano tkivo, inkorporacijom ∼60 mas % kalcijum-hidroksiapatita (HA) u matricu hidro-gela. Takođe, ispitan je uticaj neutralizacije prekursora polimerne mreže na kinetiku bubrenja i ravnotežni stepen bubrenja (SDeq).Metode - Kompozitni hidrogelovi, sastavljeni od HA i poli(metakrilne kiseline) (PMAA), sintetisani su slobodno-radikalskom polimerizacijom, pri različitim stepenima neutralizacije prekursora (SN). Svi sintetisani kompoziti sadrže visok maseni udeo HA (~60 mas %). Kompoziti su okarakterisani metodama skenirajuće elektronske mikroskopije (SEM) i dinamičko-mehaničke analize (DMA). SDeq i kinetika bubrenja ispitivani su u destilovanoj vodi i simuliranoj telesnoj tečnosti (SBF). Rezultati - Morfološka ispitivanja pokazala su uniformnu raspodelu i dobru povezanost sferičnih čestica apatita sa polimernom matricom. Analiza procesa bubrenja pokazala je proporcionalnu zavisnost SN i SDeq kompozita. Reološka ispitivanja ukazala su na obrnuto proporcionalnu zavisnost između SN i vrednosti modula sačuvane energije, koji su iznosili 55130 Pa u slučaju potpune neutralizacije i 77480 Pa u slučaju 0% neutralizacije. Značaj - Predstavljena je jednostavna metoda za sintezu kompozitnih hidrogelova sa visokim masenim udelom nanočestica punioca. Inkorporacijom nanočestica HA postignuto je značajno poboljšanje mehaničkih svojstava hidrogelova, dok je istovremeno pokazano da je promenom SN moguće kontrolisati kinetiku bubrenja hidrogelova. .",
publisher = "Beograd : Savez inženjera i tehničara Srbije",
journal = "Tehnika",
title = "Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels, Uticaj neutralizacije na svojstva poroznih hidrogelova na bazi hidroksiapatita i poli(metakrilne kiseline) sintetisanih slobodno-radikalskom polimerizacijom",
volume = "73",
number = "5",
pages = "613-620",
doi = "10.5937/tehnika1805613U"
}

Ugrinović, V., Panić, V., Veljović, Đ., Spasojević, P., Šešlija, S.,& Janaćković, Đ.. (2018). Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels. in Tehnika
Beograd : Savez inženjera i tehničara Srbije., 73(5), 613-620.
https://doi.org/10.5937/tehnika1805613U

Ugrinović V, Panić V, Veljović Đ, Spasojević P, Šešlija S, Janaćković Đ. Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels. in Tehnika. 2018;73(5):613-620.
doi:10.5937/tehnika1805613U .

Ugrinović, Vukašin, Panić, Vesna, Veljović, Đorđe, Spasojević, Pavle, Šešlija, Sanja, Janaćković, Đorđe, "Synthesis and properties of nano-hydroxyapatite/poly (methacrylic acid) composite hydrogels" in Tehnika, 73, no. 5 (2018):613-620,
https://doi.org/10.5937/tehnika1805613U . .

TY  - JOUR
AU  - Nikolić, Marija S.
AU  - Petrovic, Rada
AU  - Veljović, Đorđe
AU  - Ćosović, Vladan
AU  - Stankovic, Nadezda
AU  - Đonlagić, Jasna
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2104
AB  - Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - European Polymer Journal
T1  - Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites
VL  - 97
SP  - 198
EP  - 209
DO  - 10.1016/j.eurpolymj.2017.10.010
ER  - 

@article{
author = "Nikolić, Marija S. and Petrovic, Rada and Veljović, Đorđe and Ćosović, Vladan and Stankovic, Nadezda and Đonlagić, Jasna",
year = "2017",
abstract = "Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "European Polymer Journal",
title = "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites",
volume = "97",
pages = "198-209",
doi = "10.1016/j.eurpolymj.2017.10.010"
}

Nikolić, M. S., Petrovic, R., Veljović, Đ., Ćosović, V., Stankovic, N.,& Đonlagić, J.. (2017). Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal
Oxford : Pergamon-Elsevier Science Ltd., 97, 198-209.
https://doi.org/10.1016/j.eurpolymj.2017.10.010

Nikolić MS, Petrovic R, Veljović Đ, Ćosović V, Stankovic N, Đonlagić J. Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal. 2017;97:198-209.
doi:10.1016/j.eurpolymj.2017.10.010 .

Nikolić, Marija S., Petrovic, Rada, Veljović, Đorđe, Ćosović, Vladan, Stankovic, Nadezda, Đonlagić, Jasna, "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites" in European Polymer Journal, 97 (2017):198-209,
https://doi.org/10.1016/j.eurpolymj.2017.10.010 . .

TY  - JOUR
AU  - Nikolić, Marija S.
AU  - Petrovic, Rada
AU  - Veljović, Đorđe
AU  - Ćosović, Vladan
AU  - Stankovic, Nadezda
AU  - Đonlagić, Jasna
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/2941
AB  - Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.
PB  - Oxford : Pergamon-Elsevier Science Ltd
T2  - European Polymer Journal
T1  - Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites
VL  - 97
SP  - 198
EP  - 209
DO  - 10.1016/j.eurpolymj.2017.10.010
ER  - 

@article{
author = "Nikolić, Marija S. and Petrovic, Rada and Veljović, Đorđe and Ćosović, Vladan and Stankovic, Nadezda and Đonlagić, Jasna",
year = "2017",
abstract = "Poly(epsilon-caprolactone) (PCL) based nanocomposites with unmodified and organomodified sepiolites were prepared by solution casting method. The sepiolites were modified with short (3-mercaptopropyl)trimethoxysilane (SEP-SI) by using covalent grafting or with long hexadecylamine (SEP-HDA) by using ionic exchange. In order to reveal the influence of the organomodification on the nanoclay dispersion and the properties of the nano composites XRD, DSC, TG, SEM, TEM, optical microscopy, melt rheology and dynamic-mechanical analyses were performed. A better dispersion was achieved when organomodified sepiolites instead of native ones were used as fillers. As deduced from the melt rheology data, by analysis of the Cole-Cole plots, the best dispersion was obtained for SEP-SI nanoclay. The thermal stability was not improved, however in the initial stages of the thereto-oxidative degradation a delay in the weight loss was observed for nanocomposites with organomodified sepiolites. The mechanical properties of the nanocomposites were improved in comparison to PCL, particularly for those with modified sepiolites. In terms of mechanical properties the use of sepiolite modified with HDA gave the best results, as a consequence of better interaction between longer alkyl hydrophobic part of the organic modificator and the hydrophobic PCL matrix.",
publisher = "Oxford : Pergamon-Elsevier Science Ltd",
journal = "European Polymer Journal",
title = "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites",
volume = "97",
pages = "198-209",
doi = "10.1016/j.eurpolymj.2017.10.010"
}

Nikolić, M. S., Petrovic, R., Veljović, Đ., Ćosović, V., Stankovic, N.,& Đonlagić, J.. (2017). Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal
Oxford : Pergamon-Elsevier Science Ltd., 97, 198-209.
https://doi.org/10.1016/j.eurpolymj.2017.10.010

Nikolić MS, Petrovic R, Veljović Đ, Ćosović V, Stankovic N, Đonlagić J. Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites. in European Polymer Journal. 2017;97:198-209.
doi:10.1016/j.eurpolymj.2017.10.010 .

Nikolić, Marija S., Petrovic, Rada, Veljović, Đorđe, Ćosović, Vladan, Stankovic, Nadezda, Đonlagić, Jasna, "Effect of sepiolite organomodification on the performance of PCL/sepiolite nanocomposites" in European Polymer Journal, 97 (2017):198-209,
https://doi.org/10.1016/j.eurpolymj.2017.10.010 . .

TY  - JOUR
AU  - Šešlija, Sanja
AU  - Veljović, Đorđe
AU  - Kalagasidis Krušić, Melina
AU  - Stevanović, Jasmina
AU  - Veličković, Sava J.
AU  - Popović, Ivanka G.
PY  - 2016
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1968
AB  - The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.
PB  - Royal Soc Chemistry, Cambridge
T2  - New Journal of Chemistry
T1  - Cross-linking of highly methoxylated pectin with copper: the specific anion influence
VL  - 40
IS  - 2
SP  - 1618
EP  - 1625
DO  - 10.1039/c5nj03320a
ER  - 

@article{
author = "Šešlija, Sanja and Veljović, Đorđe and Kalagasidis Krušić, Melina and Stevanović, Jasmina and Veličković, Sava J. and Popović, Ivanka G.",
year = "2016",
abstract = "The aim of this work was to investigate the influence of specific anions on the cross-linking process of highly methoxylated pectin using the following copper salts CuSO4; Cu(C2H3O2)(2); CuCl2; and Cu(NO3)(2) wherein the initial salt concentrations were varied from 0.5 up to 10 g l(-1). It was found that the anions affected the sorption capacity wherein the Cu2+ sorption capacity from the sulphate solution was the highest, while it decreased in the presence of CH3COO-, Cl- and NO3- ions, respectively. This difference was mostly pronounced at the higher initial salt concentrations (co(Cu2+) > 2 g l(-1)). The obtained beads were characterized by FTIR, MS, SEM/EDS microanalysis and mechanical compression tests up to 80% of deformation. The sorption data were applied to the Langmuir and Freundlich isotherm models and various calculated parameters confirmed the sulphate anion supportive nature in metal ion binding. The value of the K-f parameter for the cross-linking process of pectin in the presence of acetate, chloride and nitrate was approximately the same (K-f approximate to 0.027 g g(-1)), while it was higher in the presence of sulphate anions by more than 20% (K-f = 0.0352 g g(-1)). The predicted 1/n values (1/n  LT  1, 1/n > 1, 1/n = 1 for the sulphate, nitrate and acetate, and chloride anions, respectively) were the quantitative confirmation of the specific interactions involved in the cross-linking mechanism caused by different anions. The established anion influence was in accordance with the typical ion-specific influence on macromolecules in aqueous systems proposed by Hofmeister.",
publisher = "Royal Soc Chemistry, Cambridge",
journal = "New Journal of Chemistry",
title = "Cross-linking of highly methoxylated pectin with copper: the specific anion influence",
volume = "40",
number = "2",
pages = "1618-1625",
doi = "10.1039/c5nj03320a"
}

Šešlija, S., Veljović, Đ., Kalagasidis Krušić, M., Stevanović, J., Veličković, S. J.,& Popović, I. G.. (2016). Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry
Royal Soc Chemistry, Cambridge., 40(2), 1618-1625.
https://doi.org/10.1039/c5nj03320a

Šešlija S, Veljović Đ, Kalagasidis Krušić M, Stevanović J, Veličković SJ, Popović IG. Cross-linking of highly methoxylated pectin with copper: the specific anion influence. in New Journal of Chemistry. 2016;40(2):1618-1625.
doi:10.1039/c5nj03320a .

Šešlija, Sanja, Veljović, Đorđe, Kalagasidis Krušić, Melina, Stevanović, Jasmina, Veličković, Sava J., Popović, Ivanka G., "Cross-linking of highly methoxylated pectin with copper: the specific anion influence" in New Journal of Chemistry, 40, no. 2 (2016):1618-1625,
https://doi.org/10.1039/c5nj03320a . .

TY  - JOUR
AU  - Dolic, Maja B
AU  - Rajakovic-Ognjanovic, Vladana N
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Veljović, Đorđe
AU  - Dimitrijević, Suzana I.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1791
AB  - This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The antimicrobial efficiency of silver activated sorbents
VL  - 357
SP  - 819
EP  - 831
DO  - 10.1016/j.apsusc.2015.09.032
ER  - 

@article{
author = "Dolic, Maja B and Rajakovic-Ognjanovic, Vladana N and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Veljović, Đorđe and Dimitrijević, Suzana I. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The antimicrobial efficiency of silver activated sorbents",
volume = "357",
pages = "819-831",
doi = "10.1016/j.apsusc.2015.09.032"
}

Dolic, M. B., Rajakovic-Ognjanovic, V. N., Štrbac, S., Rakočević, Z. Lj., Veljović, Đ., Dimitrijević, S. I.,& Rajaković, L. V.. (2015). The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science
Elsevier., 357, 819-831.
https://doi.org/10.1016/j.apsusc.2015.09.032

Dolic MB, Rajakovic-Ognjanovic VN, Štrbac S, Rakočević ZL, Veljović Đ, Dimitrijević SI, Rajaković LV. The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science. 2015;357:819-831.
doi:10.1016/j.apsusc.2015.09.032 .

Dolic, Maja B, Rajakovic-Ognjanovic, Vladana N, Štrbac, Svetlana, Rakočević, Zlatko Lj., Veljović, Đorđe, Dimitrijević, Suzana I., Rajaković, Ljubinka V., "The antimicrobial efficiency of silver activated sorbents" in Applied Surface Science, 357 (2015):819-831,
https://doi.org/10.1016/j.apsusc.2015.09.032 . .

TY  - JOUR
AU  - Dolic, Maja B
AU  - Rajakovic-Ognjanovic, Vladana N
AU  - Štrbac, Svetlana
AU  - Rakočević, Zlatko Lj.
AU  - Veljović, Đorđe
AU  - Dimitrijević, Suzana I.
AU  - Rajaković, Ljubinka V.
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3183
AB  - This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The antimicrobial efficiency of silver activated sorbents
VL  - 357
SP  - 819
EP  - 831
DO  - 10.1016/j.apsusc.2015.09.032
ER  - 

@article{
author = "Dolic, Maja B and Rajakovic-Ognjanovic, Vladana N and Štrbac, Svetlana and Rakočević, Zlatko Lj. and Veljović, Đorđe and Dimitrijević, Suzana I. and Rajaković, Ljubinka V.",
year = "2015",
abstract = "This study is focused on the surface modifications of the materials that are used for antimicrobial water treatment. Sorbents of different origin were activated by Ag+-ions. The selection of the most appropriate materials and the most effective activation agents was done according to the results of the sorption and desorption kinetic studies. Sorption capacities of selected sorbents: granulated activated carbon (GAC), zeolite (Z), and titanium dioxide (T), activated by Ag+-ions were following: 42.06, 13.51 and 17.53 mg/g, respectively. The antimicrobial activity of Ag/Z, Ag/GAC and Ag/T sorbents were tested against Gram-negative bacteria E. coli, Gram-positive bacteria S. aureus and yeast C. albicans. After 15 min of exposure period, the highest cell removal was obtained using Ag/Z against S. aureus and E. coli, 98.8 and 93.5%, respectively. Yeast cell inactivation was unsatisfactory for all three activated sorbents. The antimicrobial pathway of the activated sorbents has been examined by two separate tests - Ag+-ions desorbed from the activated surface to the aqueous phase and microbial cell removal caused by the Ag+-ions from the solid phase (activated surface sites). The results indicated that disinfection process significantly depended on the microbial-activated sites interactions on the modified surface. The chemical state of the activating agent had crucial impact to the inhibition rate. The characterization of the native and modified sorbents was performed by X-ray diffraction technique, X-ray photoelectron spectroscopy and scanning electron microscope. The concentration of adsorbed and released ions was determined by inductively coupled plasma optical emission spectroscopy and mass spectrometry. The antimicrobial efficiency of activated sorbents was related not only to the concentration of the activating agent, but moreover on the surface characteristics of the material, which affects the distribution and the accessibility of the activating agent.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The antimicrobial efficiency of silver activated sorbents",
volume = "357",
pages = "819-831",
doi = "10.1016/j.apsusc.2015.09.032"
}

Dolic, M. B., Rajakovic-Ognjanovic, V. N., Štrbac, S., Rakočević, Z. Lj., Veljović, Đ., Dimitrijević, S. I.,& Rajaković, L. V.. (2015). The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science
Elsevier., 357, 819-831.
https://doi.org/10.1016/j.apsusc.2015.09.032

Dolic MB, Rajakovic-Ognjanovic VN, Štrbac S, Rakočević ZL, Veljović Đ, Dimitrijević SI, Rajaković LV. The antimicrobial efficiency of silver activated sorbents. in Applied Surface Science. 2015;357:819-831.
doi:10.1016/j.apsusc.2015.09.032 .

Dolic, Maja B, Rajakovic-Ognjanovic, Vladana N, Štrbac, Svetlana, Rakočević, Zlatko Lj., Veljović, Đorđe, Dimitrijević, Suzana I., Rajaković, Ljubinka V., "The antimicrobial efficiency of silver activated sorbents" in Applied Surface Science, 357 (2015):819-831,
https://doi.org/10.1016/j.apsusc.2015.09.032 . .

TY  - JOUR
AU  - Popić, Jovan P.
AU  - Jegdić, Bore
AU  - Bajat, Jelena
AU  - Veljović, Đorđe
AU  - Stevanović, Sanja
AU  - Mišković-Stanković, Vesna
PY  - 2011
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/847
AB  - The influence of deposition temperature and concentration of NaNO(2) in the phosphating bath on the surface morphology and coverage of iron-phosphate coatings on low carbon steel was investigated. The phosphate coatings were chemically deposited on steel from phosphate bath at different temperatures (30-70 degrees C) and with the addition of different amounts of accelerator, NaNO(2) (0.1, 0.5 and 1.0 g dm(-3)). The morphology of phosphate coatings was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The composition of iron-phosphate coatings was determined using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Surface coverage was evaluated by the voltammetric anodic dissolution (VAD) technique. It was shown that the increase in temperature of the NaNO(2)-free phosphating bath up to 70 degrees C caused an increase in surface coverage. The addition of NaNO(2) in the phosphating bath significantly increased the surface coverage of phosphate coatings deposited at temperatures lower than 50 degrees C. The phosphate crystals were of laminated and needle-like structures for deposits obtained at temperatures lower than 50 degrees C, while at higher temperatures needle-like structure was transformed to laminated structure. The increase in NaNO(2) concentration in the phosphating bath from 0.1 to 1.0 g dm(-3) did not significantly increase the surface coverage, but decreased the crystals size, consequently favouring the phosphate nucleation and better packing of the crystals.
PB  - Elsevier
T2  - Applied Surface Science
T1  - The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel
VL  - 257
IS  - 24
SP  - 10855
EP  - 10862
DO  - 10.1016/j.apsusc.2011.07.122
ER  - 

@article{
author = "Popić, Jovan P. and Jegdić, Bore and Bajat, Jelena and Veljović, Đorđe and Stevanović, Sanja and Mišković-Stanković, Vesna",
year = "2011",
abstract = "The influence of deposition temperature and concentration of NaNO(2) in the phosphating bath on the surface morphology and coverage of iron-phosphate coatings on low carbon steel was investigated. The phosphate coatings were chemically deposited on steel from phosphate bath at different temperatures (30-70 degrees C) and with the addition of different amounts of accelerator, NaNO(2) (0.1, 0.5 and 1.0 g dm(-3)). The morphology of phosphate coatings was investigated using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The composition of iron-phosphate coatings was determined using energy dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD). Surface coverage was evaluated by the voltammetric anodic dissolution (VAD) technique. It was shown that the increase in temperature of the NaNO(2)-free phosphating bath up to 70 degrees C caused an increase in surface coverage. The addition of NaNO(2) in the phosphating bath significantly increased the surface coverage of phosphate coatings deposited at temperatures lower than 50 degrees C. The phosphate crystals were of laminated and needle-like structures for deposits obtained at temperatures lower than 50 degrees C, while at higher temperatures needle-like structure was transformed to laminated structure. The increase in NaNO(2) concentration in the phosphating bath from 0.1 to 1.0 g dm(-3) did not significantly increase the surface coverage, but decreased the crystals size, consequently favouring the phosphate nucleation and better packing of the crystals.",
publisher = "Elsevier",
journal = "Applied Surface Science",
title = "The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel",
volume = "257",
number = "24",
pages = "10855-10862",
doi = "10.1016/j.apsusc.2011.07.122"
}

Popić, J. P., Jegdić, B., Bajat, J., Veljović, Đ., Stevanović, S.,& Mišković-Stanković, V.. (2011). The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel. in Applied Surface Science
Elsevier., 257(24), 10855-10862.
https://doi.org/10.1016/j.apsusc.2011.07.122

Popić JP, Jegdić B, Bajat J, Veljović Đ, Stevanović S, Mišković-Stanković V. The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel. in Applied Surface Science. 2011;257(24):10855-10862.
doi:10.1016/j.apsusc.2011.07.122 .

Popić, Jovan P., Jegdić, Bore, Bajat, Jelena, Veljović, Đorđe, Stevanović, Sanja, Mišković-Stanković, Vesna, "The effect of deposition temperature on the surface coverage and morphology of iron-phosphate coatings on low carbon steel" in Applied Surface Science, 257, no. 24 (2011):10855-10862,
https://doi.org/10.1016/j.apsusc.2011.07.122 . .