TY  - JOUR
AU  - Đošić, Marija
AU  - Janković, Ana
AU  - Stevanović, Milena
AU  - Stojanović, Jovica
AU  - Vukašinović-Sekulić, Maja
AU  - Kojić, Vesna
AU  - Mišković-Stanković, Vesna
PY  - 2023
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6364
AB  - Electrophoretic deposition (EPD) was employed to fabricate composite coatings aimed for orthopedic implants. Hydroxyapatite (HAP), poly(vinyl alcohol) (PVA) and chitosan (CS) coatings, with or without antibiotic gentamicin (Gent) were deposited in a single-step process from aqueous suspension, using EPD. Polymer/mineral composite coatings were formed with the aim to mimic the natural composition of bone tissue, along with improved coatings antibacterial properties, at the same time serving as a drug carrier, allowing local administration of antibiotic. Structural and morphological characterization of HAP/PVA/CS and HAP/PVA/CS/Gent coatings was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG/DTG), and scanning electron microscopy (SEM) proving carbonate-substituted HAP. The presence of gentamicin contributed to the bactericidal activity of composite HAP/PVA/CS/Gent coating against Staphylococcus aureus and Escherichia coli. Cytotoxicity studies were performed towards human MRC-5 and mice L929 fibroblast cell lines, and both investigated samples (HAP/PVA/CS and HAP/PVA/CS/Gent) expressed good biocompatibility, without causing toxic effect on tested cells. Biomineralization potential was investigated by measuring the alkaline phosphatase activity, demonstrating high potential of HAP/PVA/CS/Gent to induce the growth of new HAP layer. Therefore, the present investigation proposes the production of composite coatings from non-toxic (aqueous) suspensions, consisting of biocompatible and bioactive components, along with antibiotic gentamicin, improving the antibacterial coatings' properties.
PB  - Elsevier Ltd.
T2  - Materials Chemistry and Physics
T1  - Hydroxyapatite/poly(vinyl alcohol)/chitosan coating with gentamicin for orthopedic implants
SP  - 127766
VL  - 303
DO  - 10.1016/j.matchemphys.2023.127766
ER  - 

@article{
author = "Đošić, Marija and Janković, Ana and Stevanović, Milena and Stojanović, Jovica and Vukašinović-Sekulić, Maja and Kojić, Vesna and Mišković-Stanković, Vesna",
year = "2023",
abstract = "Electrophoretic deposition (EPD) was employed to fabricate composite coatings aimed for orthopedic implants. Hydroxyapatite (HAP), poly(vinyl alcohol) (PVA) and chitosan (CS) coatings, with or without antibiotic gentamicin (Gent) were deposited in a single-step process from aqueous suspension, using EPD. Polymer/mineral composite coatings were formed with the aim to mimic the natural composition of bone tissue, along with improved coatings antibacterial properties, at the same time serving as a drug carrier, allowing local administration of antibiotic. Structural and morphological characterization of HAP/PVA/CS and HAP/PVA/CS/Gent coatings was investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TG/DTG), and scanning electron microscopy (SEM) proving carbonate-substituted HAP. The presence of gentamicin contributed to the bactericidal activity of composite HAP/PVA/CS/Gent coating against Staphylococcus aureus and Escherichia coli. Cytotoxicity studies were performed towards human MRC-5 and mice L929 fibroblast cell lines, and both investigated samples (HAP/PVA/CS and HAP/PVA/CS/Gent) expressed good biocompatibility, without causing toxic effect on tested cells. Biomineralization potential was investigated by measuring the alkaline phosphatase activity, demonstrating high potential of HAP/PVA/CS/Gent to induce the growth of new HAP layer. Therefore, the present investigation proposes the production of composite coatings from non-toxic (aqueous) suspensions, consisting of biocompatible and bioactive components, along with antibiotic gentamicin, improving the antibacterial coatings' properties.",
publisher = "Elsevier Ltd.",
journal = "Materials Chemistry and Physics",
title = "Hydroxyapatite/poly(vinyl alcohol)/chitosan coating with gentamicin for orthopedic implants",
pages = "127766",
volume = "303",
doi = "10.1016/j.matchemphys.2023.127766"
}

Đošić, M., Janković, A., Stevanović, M., Stojanović, J., Vukašinović-Sekulić, M., Kojić, V.,& Mišković-Stanković, V.. (2023). Hydroxyapatite/poly(vinyl alcohol)/chitosan coating with gentamicin for orthopedic implants. in Materials Chemistry and Physics
Elsevier Ltd.., 303, 127766.
https://doi.org/10.1016/j.matchemphys.2023.127766

Đošić M, Janković A, Stevanović M, Stojanović J, Vukašinović-Sekulić M, Kojić V, Mišković-Stanković V. Hydroxyapatite/poly(vinyl alcohol)/chitosan coating with gentamicin for orthopedic implants. in Materials Chemistry and Physics. 2023;303:127766.
doi:10.1016/j.matchemphys.2023.127766 .

Đošić, Marija, Janković, Ana, Stevanović, Milena, Stojanović, Jovica, Vukašinović-Sekulić, Maja, Kojić, Vesna, Mišković-Stanković, Vesna, "Hydroxyapatite/poly(vinyl alcohol)/chitosan coating with gentamicin for orthopedic implants" in Materials Chemistry and Physics, 303 (2023):127766,
https://doi.org/10.1016/j.matchemphys.2023.127766 . .

TY  - JOUR
AU  - Kazuz, Abdul
AU  - Radovanović, Željko
AU  - Veljović, Đorđe
AU  - Kojić, Vesna
AU  - Jakimov, Dimitar
AU  - Vlajić-Tovilović, Tamara
AU  - Miletić, Vesna
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5143
AB  - α-Tricalcium phosphate/fluorapatite (α-TCP/FAp) mixed powders were prepared in order to obtain dental root canal filling cements. Different liquids for cement pastes have been investigated and the most suitable one for obtaining rheologically optimal pastes was chosen for further analysis. Morphological changes in the cement materials as a consequence of the formation of hydroxyapatite (HAp) after the immersion in a simulated body fluid (SBF), an influence on the cell viability, and final success of the filling were investigated by field emission scanning electron microscopy. Treatment of the α-TCP/FAp mixtures in SBF at 37 °C resulted in a complete transformation of α-TCP into HAp after 10 days, while the exposure of MRC-5 human and L929 animal fibroblast cells to the cement showed complete absence of cytotoxicity. The root canal of an extracted tooth was filled with the α-TCP/FAp cement containing 5 wt.% of FAp and relatively strong adhesion between the cement and dentine was observed after 48 h. The same cement material was immersed during 10 days in SBF and after that both human and animal fibroblast cells during in vitro MTT tests showed higher cell viability compared to the control sample. These findings lead to a conclusion that the α-TCP/FAp based cement demonstrates potential for further development towards dental cement application.
PB  - University of Novi Sad, Faculty of Technology
T2  - Processing and Application of Ceramics
T1  - α-Tricalcium phosphate/fluorapatite-based cement – Promising dental root canal filling material
EP  - 29
IS  - 1
SP  - 22
VL  - 16
DO  - 10.2298/PAC2201022K
ER  - 

@article{
author = "Kazuz, Abdul and Radovanović, Željko and Veljović, Đorđe and Kojić, Vesna and Jakimov, Dimitar and Vlajić-Tovilović, Tamara and Miletić, Vesna and Petrović, Rada and Janaćković, Đorđe",
year = "2022",
abstract = "α-Tricalcium phosphate/fluorapatite (α-TCP/FAp) mixed powders were prepared in order to obtain dental root canal filling cements. Different liquids for cement pastes have been investigated and the most suitable one for obtaining rheologically optimal pastes was chosen for further analysis. Morphological changes in the cement materials as a consequence of the formation of hydroxyapatite (HAp) after the immersion in a simulated body fluid (SBF), an influence on the cell viability, and final success of the filling were investigated by field emission scanning electron microscopy. Treatment of the α-TCP/FAp mixtures in SBF at 37 °C resulted in a complete transformation of α-TCP into HAp after 10 days, while the exposure of MRC-5 human and L929 animal fibroblast cells to the cement showed complete absence of cytotoxicity. The root canal of an extracted tooth was filled with the α-TCP/FAp cement containing 5 wt.% of FAp and relatively strong adhesion between the cement and dentine was observed after 48 h. The same cement material was immersed during 10 days in SBF and after that both human and animal fibroblast cells during in vitro MTT tests showed higher cell viability compared to the control sample. These findings lead to a conclusion that the α-TCP/FAp based cement demonstrates potential for further development towards dental cement application.",
publisher = "University of Novi Sad, Faculty of Technology",
journal = "Processing and Application of Ceramics",
title = "α-Tricalcium phosphate/fluorapatite-based cement – Promising dental root canal filling material",
pages = "29-22",
number = "1",
volume = "16",
doi = "10.2298/PAC2201022K"
}

Kazuz, A., Radovanović, Ž., Veljović, Đ., Kojić, V., Jakimov, D., Vlajić-Tovilović, T., Miletić, V., Petrović, R.,& Janaćković, Đ.. (2022). α-Tricalcium phosphate/fluorapatite-based cement – Promising dental root canal filling material. in Processing and Application of Ceramics
University of Novi Sad, Faculty of Technology., 16(1), 22-29.
https://doi.org/10.2298/PAC2201022K

Kazuz A, Radovanović Ž, Veljović Đ, Kojić V, Jakimov D, Vlajić-Tovilović T, Miletić V, Petrović R, Janaćković Đ. α-Tricalcium phosphate/fluorapatite-based cement – Promising dental root canal filling material. in Processing and Application of Ceramics. 2022;16(1):22-29.
doi:10.2298/PAC2201022K .

Kazuz, Abdul, Radovanović, Željko, Veljović, Đorđe, Kojić, Vesna, Jakimov, Dimitar, Vlajić-Tovilović, Tamara, Miletić, Vesna, Petrović, Rada, Janaćković, Đorđe, "α-Tricalcium phosphate/fluorapatite-based cement – Promising dental root canal filling material" in Processing and Application of Ceramics, 16, no. 1 (2022):22-29,
https://doi.org/10.2298/PAC2201022K . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Radetić, Tamara
AU  - Perić-Grujić, Aleksandra
AU  - Vukašinović-Sekulić, Maja
AU  - Kojić, Vesna
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4495
AB  - Polymer-based hydrogel materials are excellent candidates for new-generation wound dressings with improved properties, such as high sorption ability, good mechanical properties and low adhesiveness. Cross-linked hydrogel matrices also serve as excellent carriers for controlled release of antibacterial agents, such as silver nanoparticles (AgNPs), which are preferred over conventional antibiotics due to low propensity to induce bacterial resistance. In this work, we aim to produce novel silver/poly(vinyl alcohol)/chitosan (Ag/PVA/CHI) hydrogels for wound dressing applications. The electrochemical AgNPs synthesis provided facile and green method for the reduction of Ag+ ions inside the hydrogel matrices, without the need to use toxic chemical reducing agents. The formation of AgNPs was confirmed using UV-visible spectroscopy, scanning and transmission electron microscopy. Release kinetics was investigated in modified phosphate buffer solution at 37 degrees C to mimic physiological conditions. Release profiles indicated "burst release" behavior, which is beneficial for wound dressing applications. The antibacterial activity was evaluated against Staphylococcus aureus and Escherichia coli strains using disc-diffusion test, and non-toxicity of hydrogels was proved by dye-exclusion test. The obtained results confirmed strong potential of Ag/PVA/CHI hydrogels for biomedical applications.
PB  - Int Assoc Physical Chemists-Iapc, Zagreb
T2  - Journal of Electrochemical Science and Engineering
T1  - Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications
EP  - 198
IS  - 2
SP  - 185
VL  - 10
DO  - 10.5599/jese.732
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Radetić, Tamara and Perić-Grujić, Aleksandra and Vukašinović-Sekulić, Maja and Kojić, Vesna and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2020",
abstract = "Polymer-based hydrogel materials are excellent candidates for new-generation wound dressings with improved properties, such as high sorption ability, good mechanical properties and low adhesiveness. Cross-linked hydrogel matrices also serve as excellent carriers for controlled release of antibacterial agents, such as silver nanoparticles (AgNPs), which are preferred over conventional antibiotics due to low propensity to induce bacterial resistance. In this work, we aim to produce novel silver/poly(vinyl alcohol)/chitosan (Ag/PVA/CHI) hydrogels for wound dressing applications. The electrochemical AgNPs synthesis provided facile and green method for the reduction of Ag+ ions inside the hydrogel matrices, without the need to use toxic chemical reducing agents. The formation of AgNPs was confirmed using UV-visible spectroscopy, scanning and transmission electron microscopy. Release kinetics was investigated in modified phosphate buffer solution at 37 degrees C to mimic physiological conditions. Release profiles indicated "burst release" behavior, which is beneficial for wound dressing applications. The antibacterial activity was evaluated against Staphylococcus aureus and Escherichia coli strains using disc-diffusion test, and non-toxicity of hydrogels was proved by dye-exclusion test. The obtained results confirmed strong potential of Ag/PVA/CHI hydrogels for biomedical applications.",
publisher = "Int Assoc Physical Chemists-Iapc, Zagreb",
journal = "Journal of Electrochemical Science and Engineering",
title = "Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications",
pages = "198-185",
number = "2",
volume = "10",
doi = "10.5599/jese.732"
}

Nešović, K., Janković, A., Radetić, T., Perić-Grujić, A., Vukašinović-Sekulić, M., Kojić, V., Rhee, K. Y.,& Mišković-Stanković, V.. (2020). Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications. in Journal of Electrochemical Science and Engineering
Int Assoc Physical Chemists-Iapc, Zagreb., 10(2), 185-198.
https://doi.org/10.5599/jese.732

Nešović K, Janković A, Radetić T, Perić-Grujić A, Vukašinović-Sekulić M, Kojić V, Rhee KY, Mišković-Stanković V. Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications. in Journal of Electrochemical Science and Engineering. 2020;10(2):185-198.
doi:10.5599/jese.732 .

Nešović, Katarina, Janković, Ana, Radetić, Tamara, Perić-Grujić, Aleksandra, Vukašinović-Sekulić, Maja, Kojić, Vesna, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Poly(vinyl alcohol)/chitosan hydrogels with electrochemically synthesized silver nanoparticles for wound dressing applications" in Journal of Electrochemical Science and Engineering, 10, no. 2 (2020):185-198,
https://doi.org/10.5599/jese.732 . .

TY  - JOUR
AU  - Stevanović, Milena
AU  - Đošić, Marija
AU  - Janković, Ana
AU  - Kojić, Vesna
AU  - Vukašinović-Sekulić, Maja
AU  - Stojanović, Jovica
AU  - Odović, Jadranka
AU  - Crevar-Sakač, Milkica
AU  - Kyong Yop, Rhee
AU  - Mišković-Stanković, Vesna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4501
AB  - Electrophoretic deposition process (EPD) was successfully used for obtaining graphene (Gr)-reinforced composite coating based on hydroxyapatite (HAP), chitosan (CS), and antibiotic gentamicin (Gent), from aqueous suspension. The deposition process was performed as a single step process at a constant voltage (5 V, deposition time 12 min) on pure titanium foils. The influence of graphene was examined through detailed physicochemical and biological characterization. Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman, and X-ray photoelectron analyses confirmed the formation of composite HAP/CS/Gr and HAP/CS/Gr/Gent coatings on Ti. Obtained coatings had porous, uniform, fracture-free surfaces, suggesting strong interfacial interaction between HAP, CS, and Gr. Large specific area of graphene enabled strong bonding with chitosan, acting as nanofiller throughout the polymer matrix. Gentamicin addition strongly improved the antibacterial activity of HAP/CS/Gr/Gent coating that was confirmed by antibacterial activity kinetics in suspension and agar diffusion testing, while results indicated more pronounced antibacterial effect againstStaphylococcus aureus(bactericidal, viable cells number reduction  gt 3 logarithmic units) compared toEscherichia coli(bacteriostatic, lt 3 logarithmic units).MTT assay indicated low cytotoxicity (75% cell viability) against MRC-5 and L929 (70% cell viability) tested cell lines, indicating good biocompatibility of HAP/CS/Gr/Gent coating. Therefore, electrodeposited HAP/CS/Gr/Gent coating on Ti can be considered as a prospective material for bone tissue engineering as a hard tissue implant.
PB  - Wiley, Hoboken
T2  - Journal of Biomedical Materials Research Part A
T1  - Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering
EP  - 2189
IS  - 11
SP  - 2175
VL  - 108
DO  - 10.1002/jbm.a.36974
ER  - 

@article{
author = "Stevanović, Milena and Đošić, Marija and Janković, Ana and Kojić, Vesna and Vukašinović-Sekulić, Maja and Stojanović, Jovica and Odović, Jadranka and Crevar-Sakač, Milkica and Kyong Yop, Rhee and Mišković-Stanković, Vesna",
year = "2020",
abstract = "Electrophoretic deposition process (EPD) was successfully used for obtaining graphene (Gr)-reinforced composite coating based on hydroxyapatite (HAP), chitosan (CS), and antibiotic gentamicin (Gent), from aqueous suspension. The deposition process was performed as a single step process at a constant voltage (5 V, deposition time 12 min) on pure titanium foils. The influence of graphene was examined through detailed physicochemical and biological characterization. Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman, and X-ray photoelectron analyses confirmed the formation of composite HAP/CS/Gr and HAP/CS/Gr/Gent coatings on Ti. Obtained coatings had porous, uniform, fracture-free surfaces, suggesting strong interfacial interaction between HAP, CS, and Gr. Large specific area of graphene enabled strong bonding with chitosan, acting as nanofiller throughout the polymer matrix. Gentamicin addition strongly improved the antibacterial activity of HAP/CS/Gr/Gent coating that was confirmed by antibacterial activity kinetics in suspension and agar diffusion testing, while results indicated more pronounced antibacterial effect againstStaphylococcus aureus(bactericidal, viable cells number reduction  gt 3 logarithmic units) compared toEscherichia coli(bacteriostatic, lt 3 logarithmic units).MTT assay indicated low cytotoxicity (75% cell viability) against MRC-5 and L929 (70% cell viability) tested cell lines, indicating good biocompatibility of HAP/CS/Gr/Gent coating. Therefore, electrodeposited HAP/CS/Gr/Gent coating on Ti can be considered as a prospective material for bone tissue engineering as a hard tissue implant.",
publisher = "Wiley, Hoboken",
journal = "Journal of Biomedical Materials Research Part A",
title = "Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering",
pages = "2189-2175",
number = "11",
volume = "108",
doi = "10.1002/jbm.a.36974"
}

Stevanović, M., Đošić, M., Janković, A., Kojić, V., Vukašinović-Sekulić, M., Stojanović, J., Odović, J., Crevar-Sakač, M., Kyong Yop, R.,& Mišković-Stanković, V.. (2020). Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering. in Journal of Biomedical Materials Research Part A
Wiley, Hoboken., 108(11), 2175-2189.
https://doi.org/10.1002/jbm.a.36974

Stevanović M, Đošić M, Janković A, Kojić V, Vukašinović-Sekulić M, Stojanović J, Odović J, Crevar-Sakač M, Kyong Yop R, Mišković-Stanković V. Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering. in Journal of Biomedical Materials Research Part A. 2020;108(11):2175-2189.
doi:10.1002/jbm.a.36974 .

Stevanović, Milena, Đošić, Marija, Janković, Ana, Kojić, Vesna, Vukašinović-Sekulić, Maja, Stojanović, Jovica, Odović, Jadranka, Crevar-Sakač, Milkica, Kyong Yop, Rhee, Mišković-Stanković, Vesna, "Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering" in Journal of Biomedical Materials Research Part A, 108, no. 11 (2020):2175-2189,
https://doi.org/10.1002/jbm.a.36974 . .

TY  - JOUR
AU  - Stevanović, Milena
AU  - Đošić, Marija
AU  - Janković, Ana
AU  - Kojić, Vesna
AU  - Vukašinović-Sekulić, Maja
AU  - Stojanović, Jovica
AU  - Odović, Jadranka
AU  - Crevar-Sakač, Milkica
AU  - Kyong Yop, Rhee
AU  - Mišković-Stanković, Vesna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4725
AB  - Electrophoretic deposition process (EPD) was successfully used for obtaining graphene (Gr)-reinforced composite coating based on hydroxyapatite (HAP), chitosan (CS), and antibiotic gentamicin (Gent), from aqueous suspension. The deposition process was performed as a single step process at a constant voltage (5 V, deposition time 12 min) on pure titanium foils. The influence of graphene was examined through detailed physicochemical and biological characterization. Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman, and X-ray photoelectron analyses confirmed the formation of composite HAP/CS/Gr and HAP/CS/Gr/Gent coatings on Ti. Obtained coatings had porous, uniform, fracture-free surfaces, suggesting strong interfacial interaction between HAP, CS, and Gr. Large specific area of graphene enabled strong bonding with chitosan, acting as nanofiller throughout the polymer matrix. Gentamicin addition strongly improved the antibacterial activity of HAP/CS/Gr/Gent coating that was confirmed by antibacterial activity kinetics in suspension and agar diffusion testing, while results indicated more pronounced antibacterial effect againstStaphylococcus aureus(bactericidal, viable cells number reduction  gt 3 logarithmic units) compared toEscherichia coli(bacteriostatic, lt 3 logarithmic units).MTT assay indicated low cytotoxicity (75% cell viability) against MRC-5 and L929 (70% cell viability) tested cell lines, indicating good biocompatibility of HAP/CS/Gr/Gent coating. Therefore, electrodeposited HAP/CS/Gr/Gent coating on Ti can be considered as a prospective material for bone tissue engineering as a hard tissue implant.
PB  - Wiley, Hoboken
T2  - Journal of Biomedical Materials Research Part A
T1  - Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering
EP  - 2189
IS  - 11
SP  - 2175
VL  - 108
DO  - 10.1002/jbm.a.36974
ER  - 

@article{
author = "Stevanović, Milena and Đošić, Marija and Janković, Ana and Kojić, Vesna and Vukašinović-Sekulić, Maja and Stojanović, Jovica and Odović, Jadranka and Crevar-Sakač, Milkica and Kyong Yop, Rhee and Mišković-Stanković, Vesna",
year = "2020",
abstract = "Electrophoretic deposition process (EPD) was successfully used for obtaining graphene (Gr)-reinforced composite coating based on hydroxyapatite (HAP), chitosan (CS), and antibiotic gentamicin (Gent), from aqueous suspension. The deposition process was performed as a single step process at a constant voltage (5 V, deposition time 12 min) on pure titanium foils. The influence of graphene was examined through detailed physicochemical and biological characterization. Fourier transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, X-ray diffraction, Raman, and X-ray photoelectron analyses confirmed the formation of composite HAP/CS/Gr and HAP/CS/Gr/Gent coatings on Ti. Obtained coatings had porous, uniform, fracture-free surfaces, suggesting strong interfacial interaction between HAP, CS, and Gr. Large specific area of graphene enabled strong bonding with chitosan, acting as nanofiller throughout the polymer matrix. Gentamicin addition strongly improved the antibacterial activity of HAP/CS/Gr/Gent coating that was confirmed by antibacterial activity kinetics in suspension and agar diffusion testing, while results indicated more pronounced antibacterial effect againstStaphylococcus aureus(bactericidal, viable cells number reduction  gt 3 logarithmic units) compared toEscherichia coli(bacteriostatic, lt 3 logarithmic units).MTT assay indicated low cytotoxicity (75% cell viability) against MRC-5 and L929 (70% cell viability) tested cell lines, indicating good biocompatibility of HAP/CS/Gr/Gent coating. Therefore, electrodeposited HAP/CS/Gr/Gent coating on Ti can be considered as a prospective material for bone tissue engineering as a hard tissue implant.",
publisher = "Wiley, Hoboken",
journal = "Journal of Biomedical Materials Research Part A",
title = "Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering",
pages = "2189-2175",
number = "11",
volume = "108",
doi = "10.1002/jbm.a.36974"
}

Stevanović, M., Đošić, M., Janković, A., Kojić, V., Vukašinović-Sekulić, M., Stojanović, J., Odović, J., Crevar-Sakač, M., Kyong Yop, R.,& Mišković-Stanković, V.. (2020). Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering. in Journal of Biomedical Materials Research Part A
Wiley, Hoboken., 108(11), 2175-2189.
https://doi.org/10.1002/jbm.a.36974

Stevanović M, Đošić M, Janković A, Kojić V, Vukašinović-Sekulić M, Stojanović J, Odović J, Crevar-Sakač M, Kyong Yop R, Mišković-Stanković V. Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering. in Journal of Biomedical Materials Research Part A. 2020;108(11):2175-2189.
doi:10.1002/jbm.a.36974 .

Stevanović, Milena, Đošić, Marija, Janković, Ana, Kojić, Vesna, Vukašinović-Sekulić, Maja, Stojanović, Jovica, Odović, Jadranka, Crevar-Sakač, Milkica, Kyong Yop, Rhee, Mišković-Stanković, Vesna, "Antibacterial graphene-based hydroxyapatite/chitosan coating with gentamicin for potential applications in bone tissue engineering" in Journal of Biomedical Materials Research Part A, 108, no. 11 (2020):2175-2189,
https://doi.org/10.1002/jbm.a.36974 . .

TY  - JOUR
AU  - Stevanović, Milena
AU  - Đošić, Marija
AU  - Janković, Ana
AU  - Nešović, Katarina
AU  - Kojić, Vesna
AU  - Stojanović, Jovica
AU  - Grujić, Svetlana
AU  - Matić-Bujagić, Ivana
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4498
AB  - The electrophoretic deposition process (EPD) was utilized to produce bioactive hydroxyapatite/chitosan (HAP/CS) and hydroxyapatite/chitosan/gentamicin (HAP/CS/Gent) coatings on titanium. The bioactivity of newly synthesized composite coatings was investigated in the simulated body fluid (SBF) and examined by X-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. The obtained results revealed carbonate-substituted hydroxyapatite after immersion in SBF, emphasizing the similarity of the biomimetically grown HAP with the naturally occurring apatite in the bone. The formation of biomimetic HAP was confirmed by electrochemical impedance spectroscopy and polarization measurements, through the decrease in corrosion current density and coating capacitance values after 28-day immersion in SBF. The osseointegration ability was further validated by measuring the alkaline phosphatase activity (ALP) indicating the favorable osseopromotive properties of deposited coatings (significant increase in ALP levels for both HAP/CS (3.206 U mL(-1)) and HAP/CS/Gent (4.039 U mL(-1)) coatings, compared to the control (0.900 U mL(-1))). Drug-release kinetics was investigated in deionized water at 37 degrees C by high-performance liquid chromatography coupled with mass spectrometry. Release profiles revealed the beneficial "burst-release effect" (similar to 21% of gentamicin released in the first 48 h) as a potentially promising solution against the biofilm formation in the initial period. When tested against human and mice fibroblast cells (MRC-5 and L929), both composite coatings showed a noncytotoxic effect (viability  gt 85%), providing a promising basis for further medical application trials.
PB  - Amer Chemical Soc, Washington
T2  - ACS Omega
T1  - Assessing the Bioactivity of Gentamicin-Preloaded Hydroxyapatite/Chitosan Composite Coating on Titanium Substrate
EP  - 15445
IS  - 25
SP  - 15433
VL  - 5
DO  - 10.1021/acsomega.0c01583
ER  - 

@article{
author = "Stevanović, Milena and Đošić, Marija and Janković, Ana and Nešović, Katarina and Kojić, Vesna and Stojanović, Jovica and Grujić, Svetlana and Matić-Bujagić, Ivana and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2020",
abstract = "The electrophoretic deposition process (EPD) was utilized to produce bioactive hydroxyapatite/chitosan (HAP/CS) and hydroxyapatite/chitosan/gentamicin (HAP/CS/Gent) coatings on titanium. The bioactivity of newly synthesized composite coatings was investigated in the simulated body fluid (SBF) and examined by X-ray diffraction, Fourier transform infrared spectroscopy, and field emission scanning electron microscopy. The obtained results revealed carbonate-substituted hydroxyapatite after immersion in SBF, emphasizing the similarity of the biomimetically grown HAP with the naturally occurring apatite in the bone. The formation of biomimetic HAP was confirmed by electrochemical impedance spectroscopy and polarization measurements, through the decrease in corrosion current density and coating capacitance values after 28-day immersion in SBF. The osseointegration ability was further validated by measuring the alkaline phosphatase activity (ALP) indicating the favorable osseopromotive properties of deposited coatings (significant increase in ALP levels for both HAP/CS (3.206 U mL(-1)) and HAP/CS/Gent (4.039 U mL(-1)) coatings, compared to the control (0.900 U mL(-1))). Drug-release kinetics was investigated in deionized water at 37 degrees C by high-performance liquid chromatography coupled with mass spectrometry. Release profiles revealed the beneficial "burst-release effect" (similar to 21% of gentamicin released in the first 48 h) as a potentially promising solution against the biofilm formation in the initial period. When tested against human and mice fibroblast cells (MRC-5 and L929), both composite coatings showed a noncytotoxic effect (viability  gt 85%), providing a promising basis for further medical application trials.",
publisher = "Amer Chemical Soc, Washington",
journal = "ACS Omega",
title = "Assessing the Bioactivity of Gentamicin-Preloaded Hydroxyapatite/Chitosan Composite Coating on Titanium Substrate",
pages = "15445-15433",
number = "25",
volume = "5",
doi = "10.1021/acsomega.0c01583"
}

Stevanović, M., Đošić, M., Janković, A., Nešović, K., Kojić, V., Stojanović, J., Grujić, S., Matić-Bujagić, I., Rhee, K. Y.,& Mišković-Stanković, V.. (2020). Assessing the Bioactivity of Gentamicin-Preloaded Hydroxyapatite/Chitosan Composite Coating on Titanium Substrate. in ACS Omega
Amer Chemical Soc, Washington., 5(25), 15433-15445.
https://doi.org/10.1021/acsomega.0c01583

Stevanović M, Đošić M, Janković A, Nešović K, Kojić V, Stojanović J, Grujić S, Matić-Bujagić I, Rhee KY, Mišković-Stanković V. Assessing the Bioactivity of Gentamicin-Preloaded Hydroxyapatite/Chitosan Composite Coating on Titanium Substrate. in ACS Omega. 2020;5(25):15433-15445.
doi:10.1021/acsomega.0c01583 .

Stevanović, Milena, Đošić, Marija, Janković, Ana, Nešović, Katarina, Kojić, Vesna, Stojanović, Jovica, Grujić, Svetlana, Matić-Bujagić, Ivana, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Assessing the Bioactivity of Gentamicin-Preloaded Hydroxyapatite/Chitosan Composite Coating on Titanium Substrate" in ACS Omega, 5, no. 25 (2020):15433-15445,
https://doi.org/10.1021/acsomega.0c01583 . .

TY  - JOUR
AU  - Kazuz, A.
AU  - Radovanović, Željko
AU  - Veljović, Đorđe
AU  - Kojić, Vesna
AU  - Miletić, Vesna
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4371
AB  - Composite cements based on alpha-tricalcium phosphate (alpha-TCP) and nanostructured fluorapatite (FAp), alpha-TCP/FAp, appropriate for dental usage as root canal filling material, have been prepared with the improved mechanical properties and biocompatibility. The influence of FAp concentration on the composite cement properties was investigated. The processing conditions for FAp powders synthesis were optimized and the powder with optimal properties was chosen to obtain alpha-TCP/FAp composite types of cement alpha-TCP powder was prepared by calcination of hydrothermally synthesized hydroxyapatite (HAp) at 1500 degrees C for 2 h. Morphology and phase composition of powders were investigated by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDS). Soaking of alpha-TCP/FAp specimens in simulated body fluid (SBF) affected the successful transformation of alpha-TCP into HAp, while the compressive test revealed the influence of this transformation and FAp content on the mechanical properties of the composites. Specimen containing 5% of FAp after 10 days in SBF showed the highest compressive strength. In vitro MIT and DET biocompatibility tests, performed in the culture of MRC-5 human fibroblast cells, revealed that alpha-TCP/FAp had no cytotoxic effect. These initial findings showed that alpha-TCP/FAp composite cements could yield favorable mechanical properties with no adverse effect on biocompatibility.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - alpha-Tricalcium phosphate/fluorapatite based composite cements: Synthesis, mechanical properties, and biocompatibility
IS  - 16
VL  - 46
DO  - 10.1016/j.ceramint.2020.06.301
ER  - 

@article{
author = "Kazuz, A. and Radovanović, Željko and Veljović, Đorđe and Kojić, Vesna and Miletić, Vesna and Petrović, Rada and Janaćković, Đorđe",
year = "2020",
abstract = "Composite cements based on alpha-tricalcium phosphate (alpha-TCP) and nanostructured fluorapatite (FAp), alpha-TCP/FAp, appropriate for dental usage as root canal filling material, have been prepared with the improved mechanical properties and biocompatibility. The influence of FAp concentration on the composite cement properties was investigated. The processing conditions for FAp powders synthesis were optimized and the powder with optimal properties was chosen to obtain alpha-TCP/FAp composite types of cement alpha-TCP powder was prepared by calcination of hydrothermally synthesized hydroxyapatite (HAp) at 1500 degrees C for 2 h. Morphology and phase composition of powders were investigated by X-ray diffraction (XRD), Fourier transformed infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FESEM), and energy dispersive X-ray spectroscopy (EDS). Soaking of alpha-TCP/FAp specimens in simulated body fluid (SBF) affected the successful transformation of alpha-TCP into HAp, while the compressive test revealed the influence of this transformation and FAp content on the mechanical properties of the composites. Specimen containing 5% of FAp after 10 days in SBF showed the highest compressive strength. In vitro MIT and DET biocompatibility tests, performed in the culture of MRC-5 human fibroblast cells, revealed that alpha-TCP/FAp had no cytotoxic effect. These initial findings showed that alpha-TCP/FAp composite cements could yield favorable mechanical properties with no adverse effect on biocompatibility.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "alpha-Tricalcium phosphate/fluorapatite based composite cements: Synthesis, mechanical properties, and biocompatibility",
number = "16",
volume = "46",
doi = "10.1016/j.ceramint.2020.06.301"
}

Kazuz, A., Radovanović, Ž., Veljović, Đ., Kojić, V., Miletić, V., Petrović, R.,& Janaćković, Đ.. (2020). alpha-Tricalcium phosphate/fluorapatite based composite cements: Synthesis, mechanical properties, and biocompatibility. in Ceramics International
Elsevier Sci Ltd, Oxford., 46(16).
https://doi.org/10.1016/j.ceramint.2020.06.301

Kazuz A, Radovanović Ž, Veljović Đ, Kojić V, Miletić V, Petrović R, Janaćković Đ. alpha-Tricalcium phosphate/fluorapatite based composite cements: Synthesis, mechanical properties, and biocompatibility. in Ceramics International. 2020;46(16).
doi:10.1016/j.ceramint.2020.06.301 .

Kazuz, A., Radovanović, Željko, Veljović, Đorđe, Kojić, Vesna, Miletić, Vesna, Petrović, Rada, Janaćković, Đorđe, "alpha-Tricalcium phosphate/fluorapatite based composite cements: Synthesis, mechanical properties, and biocompatibility" in Ceramics International, 46, no. 16 (2020),
https://doi.org/10.1016/j.ceramint.2020.06.301 . .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Matić, Tamara
AU  - Stamenić, Tanja
AU  - Kojić, Vesna
AU  - Dimitrijević-Branković, Suzana
AU  - Lukić, Miodrag J.
AU  - Jevtić, Sanja
AU  - Radovanović, Željko
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4126
AB  - The aim of this study was to improve the mechanical properties and to optimize antimicrobial activity of hydroxyapatite (HAP) by simultaneous doping with Mg and Cu ions in order to obtain material that would be able to assist in the bone/tooth healing process, prevent post-implementation infections and provide satisfying values of hardness and fracture toughness for biomedical application. Ion doping was done during the hydrothermal synthesis of HAP powders, whereby the content of Mg ions in the starting solution was varied between 1-20 mol. % with regard to Ca ions, while the amount of Cu ions was kept constant at 0.4 mol. %. The green compacts were sintered for 2 h at temperatures ranging 750-1200 degrees C depending on the Mg content, chosen in agreement with dilatometry results. Presence of Mg ions was found to favour transition from HAP to beta-tricalcium phosphate phase (beta-TCP), which enabled formation of biphasic HAP/beta-TCP and pure beta-TCP phase at 160 degrees C during hydrothermal synthesis. In vitro investigation of antimicrobial activity against Escherichia coli, Staphylococcus aureus and Enterococcus faecalis showed satisfactory antimicrobial activity. MTT assay performed on MRC-5 and L929 cell lines showed excellent cytocompatibility and cell proliferation. Maximum hardness by Vickers and fracture toughness values, 4.96 GPa and 1.75 MPa m(1/2) respectively, were obtained upon addition of 5 mol. % Mg, as a consequence of the lowest grain size and porosity, as well as the highest densification rate. This is, to the best of our knowledge, the highest fracture toughness for HAP or beta-TCP ceramics reported thus far.
PB  - Elsevier Sci Ltd, Oxford
T2  - Ceramics International
T1  - Mg/Cu co-substituted hydroxyapatite - Biocompatibility, mechanical properties and antimicrobial activity
EP  - 22039
IS  - 17
SP  - 22029
VL  - 45
DO  - 10.1016/j.ceramint.2019.07.219
ER  - 

@article{
author = "Veljović, Đorđe and Matić, Tamara and Stamenić, Tanja and Kojić, Vesna and Dimitrijević-Branković, Suzana and Lukić, Miodrag J. and Jevtić, Sanja and Radovanović, Željko and Petrović, Rada and Janaćković, Đorđe",
year = "2019",
abstract = "The aim of this study was to improve the mechanical properties and to optimize antimicrobial activity of hydroxyapatite (HAP) by simultaneous doping with Mg and Cu ions in order to obtain material that would be able to assist in the bone/tooth healing process, prevent post-implementation infections and provide satisfying values of hardness and fracture toughness for biomedical application. Ion doping was done during the hydrothermal synthesis of HAP powders, whereby the content of Mg ions in the starting solution was varied between 1-20 mol. % with regard to Ca ions, while the amount of Cu ions was kept constant at 0.4 mol. %. The green compacts were sintered for 2 h at temperatures ranging 750-1200 degrees C depending on the Mg content, chosen in agreement with dilatometry results. Presence of Mg ions was found to favour transition from HAP to beta-tricalcium phosphate phase (beta-TCP), which enabled formation of biphasic HAP/beta-TCP and pure beta-TCP phase at 160 degrees C during hydrothermal synthesis. In vitro investigation of antimicrobial activity against Escherichia coli, Staphylococcus aureus and Enterococcus faecalis showed satisfactory antimicrobial activity. MTT assay performed on MRC-5 and L929 cell lines showed excellent cytocompatibility and cell proliferation. Maximum hardness by Vickers and fracture toughness values, 4.96 GPa and 1.75 MPa m(1/2) respectively, were obtained upon addition of 5 mol. % Mg, as a consequence of the lowest grain size and porosity, as well as the highest densification rate. This is, to the best of our knowledge, the highest fracture toughness for HAP or beta-TCP ceramics reported thus far.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Ceramics International",
title = "Mg/Cu co-substituted hydroxyapatite - Biocompatibility, mechanical properties and antimicrobial activity",
pages = "22039-22029",
number = "17",
volume = "45",
doi = "10.1016/j.ceramint.2019.07.219"
}

Veljović, Đ., Matić, T., Stamenić, T., Kojić, V., Dimitrijević-Branković, S., Lukić, M. J., Jevtić, S., Radovanović, Ž., Petrović, R.,& Janaćković, Đ.. (2019). Mg/Cu co-substituted hydroxyapatite - Biocompatibility, mechanical properties and antimicrobial activity. in Ceramics International
Elsevier Sci Ltd, Oxford., 45(17), 22029-22039.
https://doi.org/10.1016/j.ceramint.2019.07.219

Veljović Đ, Matić T, Stamenić T, Kojić V, Dimitrijević-Branković S, Lukić MJ, Jevtić S, Radovanović Ž, Petrović R, Janaćković Đ. Mg/Cu co-substituted hydroxyapatite - Biocompatibility, mechanical properties and antimicrobial activity. in Ceramics International. 2019;45(17):22029-22039.
doi:10.1016/j.ceramint.2019.07.219 .

Veljović, Đorđe, Matić, Tamara, Stamenić, Tanja, Kojić, Vesna, Dimitrijević-Branković, Suzana, Lukić, Miodrag J., Jevtić, Sanja, Radovanović, Željko, Petrović, Rada, Janaćković, Đorđe, "Mg/Cu co-substituted hydroxyapatite - Biocompatibility, mechanical properties and antimicrobial activity" in Ceramics International, 45, no. 17 (2019):22029-22039,
https://doi.org/10.1016/j.ceramint.2019.07.219 . .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Matić, Tamara
AU  - Stamenić, Tanja
AU  - Kojić, Vesna
AU  - Dimitrijević-Branković, Suzana
AU  - Lukić, Miodrag J.
AU  - Jevtić, Sanja
AU  - Radovanović, Željko
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5045
AB  - The aim of this study was to improve the mechanical properties and to optimize antimicrobial activity of hydroxyapatite (HAP) by simultaneous doping with Mg and Cu ions in order to obtain material that would be able to assist in the bone/tooth healing process, prevent post-implementation infections and provide satisfying values of hardness and fracture toughness for biomedical application. Ion doping was done during the hydrothermal synthesis of HAP powders, whereby the content of Mg ions in the starting solution was varied between 1-20 mol. % with regard to Ca ions, while the amount of Cu ions was kept constant at 0.4 mol. %. The green compacts were sintered for 2 h at temperatures ranging 750–1200 °C depending on the Mg content, chosen in agreement with dilatometry results. Presence of Mg ions was found to favour transition from HAP to β−tricalcium phosphate phase (β−TCP), which enabled formation of biphasic HAP/β−TCP and pure β−TCP phase at 160 °C during hydrothermal synthesis. In vitro investigation of antimicrobial activity against Escherichia coli, Staphylococcus aureus and Enterococcus faecalis showed satisfactory antimicrobial activity. MTT assay performed on MRC-5 and L929 cell lines showed excellent cytocompatibility and cell proliferation. Maximum hardness by Vickers and fracture toughness values, 4.96 GPa and 1.75 MPa m1/2 respectively, were obtained upon addition of 5 mol. % Mg, as a consequence of the lowest grain size and porosity, as well as the highest densification rate. This is, to the best of our knowledge, the highest fracture toughness for HAP or β-TCP ceramics reported thus far.
PB  - Elsevier Ltd
T2  - Ceramics International
T1  - Mg/Cu co-substituted hydroxyapatite – Biocompatibility, mechanical properties and antimicrobial activity
EP  - 22039
IS  - 17
SP  - 22029
VL  - 45
DO  - 10.1016/j.ceramint.2019.07.219
ER  - 

@article{
author = "Veljović, Đorđe and Matić, Tamara and Stamenić, Tanja and Kojić, Vesna and Dimitrijević-Branković, Suzana and Lukić, Miodrag J. and Jevtić, Sanja and Radovanović, Željko and Petrović, Rada and Janaćković, Đorđe",
year = "2019",
abstract = "The aim of this study was to improve the mechanical properties and to optimize antimicrobial activity of hydroxyapatite (HAP) by simultaneous doping with Mg and Cu ions in order to obtain material that would be able to assist in the bone/tooth healing process, prevent post-implementation infections and provide satisfying values of hardness and fracture toughness for biomedical application. Ion doping was done during the hydrothermal synthesis of HAP powders, whereby the content of Mg ions in the starting solution was varied between 1-20 mol. % with regard to Ca ions, while the amount of Cu ions was kept constant at 0.4 mol. %. The green compacts were sintered for 2 h at temperatures ranging 750–1200 °C depending on the Mg content, chosen in agreement with dilatometry results. Presence of Mg ions was found to favour transition from HAP to β−tricalcium phosphate phase (β−TCP), which enabled formation of biphasic HAP/β−TCP and pure β−TCP phase at 160 °C during hydrothermal synthesis. In vitro investigation of antimicrobial activity against Escherichia coli, Staphylococcus aureus and Enterococcus faecalis showed satisfactory antimicrobial activity. MTT assay performed on MRC-5 and L929 cell lines showed excellent cytocompatibility and cell proliferation. Maximum hardness by Vickers and fracture toughness values, 4.96 GPa and 1.75 MPa m1/2 respectively, were obtained upon addition of 5 mol. % Mg, as a consequence of the lowest grain size and porosity, as well as the highest densification rate. This is, to the best of our knowledge, the highest fracture toughness for HAP or β-TCP ceramics reported thus far.",
publisher = "Elsevier Ltd",
journal = "Ceramics International",
title = "Mg/Cu co-substituted hydroxyapatite – Biocompatibility, mechanical properties and antimicrobial activity",
pages = "22039-22029",
number = "17",
volume = "45",
doi = "10.1016/j.ceramint.2019.07.219"
}

Veljović, Đ., Matić, T., Stamenić, T., Kojić, V., Dimitrijević-Branković, S., Lukić, M. J., Jevtić, S., Radovanović, Ž., Petrović, R.,& Janaćković, Đ.. (2019). Mg/Cu co-substituted hydroxyapatite – Biocompatibility, mechanical properties and antimicrobial activity. in Ceramics International
Elsevier Ltd., 45(17), 22029-22039.
https://doi.org/10.1016/j.ceramint.2019.07.219

Veljović Đ, Matić T, Stamenić T, Kojić V, Dimitrijević-Branković S, Lukić MJ, Jevtić S, Radovanović Ž, Petrović R, Janaćković Đ. Mg/Cu co-substituted hydroxyapatite – Biocompatibility, mechanical properties and antimicrobial activity. in Ceramics International. 2019;45(17):22029-22039.
doi:10.1016/j.ceramint.2019.07.219 .

Veljović, Đorđe, Matić, Tamara, Stamenić, Tanja, Kojić, Vesna, Dimitrijević-Branković, Suzana, Lukić, Miodrag J., Jevtić, Sanja, Radovanović, Željko, Petrović, Rada, Janaćković, Đorđe, "Mg/Cu co-substituted hydroxyapatite – Biocompatibility, mechanical properties and antimicrobial activity" in Ceramics International, 45, no. 17 (2019):22029-22039,
https://doi.org/10.1016/j.ceramint.2019.07.219 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Radetić, Tamara
AU  - Vukašinović-Sekulić, Maja
AU  - Kojić, Vesna
AU  - Živković, Ljiljana
AU  - Perić-Grujić, Aleksandra
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4113
AB  - In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV-visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications.
PB  - Pergamon-Elsevier Science Ltd, Oxford
T2  - European Polymer Journal
T1  - Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles - In vitro study
VL  - 121
DO  - 10.1016/j.eurpolymj.2019.109257
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Radetić, Tamara and Vukašinović-Sekulić, Maja and Kojić, Vesna and Živković, Ljiljana and Perić-Grujić, Aleksandra and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2019",
abstract = "In this work, we provide a facile path for the preparation of wound dressing materials with improved characteristics based on biocompatible chitosan and poly(vinyl alcohol) hydrogels with embedded silver nanoparticles (AgNPs) as a potent antimicrobial agent. The hydrogels were prepared via freezing-thawing method, whereas AgNPs were synthesized via an in situ electrochemical route. The excellent physicochemical properties of the obtained nanocomposite hydrogels were validated using different spectroscopic and microscopic techniques. The formation of sub-10 nm AgNPs was confirmed by UV-visible spectroscopy, dynamic light scattering and transmission electron microscopy. Swelling and silver release profiles were validated using several diffusion models. The hydrogels were proven to be non-cytotoxic using MTT test and possessed powerful antibacterial activity against Staphylococcus aureus and Escherichia coli, as determined by test in suspension, which affirmed their feasibility for wound dressing applications.",
publisher = "Pergamon-Elsevier Science Ltd, Oxford",
journal = "European Polymer Journal",
title = "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles - In vitro study",
volume = "121",
doi = "10.1016/j.eurpolymj.2019.109257"
}

Nešović, K., Janković, A., Radetić, T., Vukašinović-Sekulić, M., Kojić, V., Živković, L., Perić-Grujić, A., Rhee, K. Y.,& Mišković-Stanković, V.. (2019). Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles - In vitro study. in European Polymer Journal
Pergamon-Elsevier Science Ltd, Oxford., 121.
https://doi.org/10.1016/j.eurpolymj.2019.109257

Nešović K, Janković A, Radetić T, Vukašinović-Sekulić M, Kojić V, Živković L, Perić-Grujić A, Rhee KY, Mišković-Stanković V. Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles - In vitro study. in European Polymer Journal. 2019;121.
doi:10.1016/j.eurpolymj.2019.109257 .

Nešović, Katarina, Janković, Ana, Radetić, Tamara, Vukašinović-Sekulić, Maja, Kojić, Vesna, Živković, Ljiljana, Perić-Grujić, Aleksandra, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Chitosan-based hydrogel wound dressings with electrochemically incorporated silver nanoparticles - In vitro study" in European Polymer Journal, 121 (2019),
https://doi.org/10.1016/j.eurpolymj.2019.109257 . .

TY  - JOUR
AU  - Knežević, Nikola Ž.
AU  - Đorđević, Sanja
AU  - Kojić, Vesna
AU  - Janaćković, Đorđe
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4156
AB  - Suramin (SUR) is a known drug for treating parasitic infections though research studies and some clinical trials have shown its applicability for a plethora of other diseases. Herein we report on a novel SUR nanocarrier for the drug delivery to cells. We synthesized periodic mesoporous organosilica nanoparticles with spherical morphology, having mean diameter of 240 nm and high surface area (778 m(2)/g). The material's surface is modified with an amine-containing organic moiety N-[3-(Trimethoxysilyl)propyl]ethylenediamine (DA), followed by surface attachment with the drug. The rate of SUR release in physiological condition was low, though in vitro experiments on MRC-5 cell line demonstrate effective delivery of the drug to the cells and low toxicity of the materials without the adsorbed drug. These results are promising for opening new treatment strategies with SUR-bearing nanocarriers, with high efficiency and low adverse effects on healthy tissues.
PB  - MDPI, Basel
T2  - Inorganics
T1  - Functionalized Periodic Mesoporous Organosilica Nanoparticles for Loading and Delivery of Suramin
IS  - 2
VL  - 7
DO  - 10.3390/inorganics7020016
ER  - 

@article{
author = "Knežević, Nikola Ž. and Đorđević, Sanja and Kojić, Vesna and Janaćković, Đorđe",
year = "2019",
abstract = "Suramin (SUR) is a known drug for treating parasitic infections though research studies and some clinical trials have shown its applicability for a plethora of other diseases. Herein we report on a novel SUR nanocarrier for the drug delivery to cells. We synthesized periodic mesoporous organosilica nanoparticles with spherical morphology, having mean diameter of 240 nm and high surface area (778 m(2)/g). The material's surface is modified with an amine-containing organic moiety N-[3-(Trimethoxysilyl)propyl]ethylenediamine (DA), followed by surface attachment with the drug. The rate of SUR release in physiological condition was low, though in vitro experiments on MRC-5 cell line demonstrate effective delivery of the drug to the cells and low toxicity of the materials without the adsorbed drug. These results are promising for opening new treatment strategies with SUR-bearing nanocarriers, with high efficiency and low adverse effects on healthy tissues.",
publisher = "MDPI, Basel",
journal = "Inorganics",
title = "Functionalized Periodic Mesoporous Organosilica Nanoparticles for Loading and Delivery of Suramin",
number = "2",
volume = "7",
doi = "10.3390/inorganics7020016"
}

Knežević, N. Ž., Đorđević, S., Kojić, V.,& Janaćković, Đ.. (2019). Functionalized Periodic Mesoporous Organosilica Nanoparticles for Loading and Delivery of Suramin. in Inorganics
MDPI, Basel., 7(2).
https://doi.org/10.3390/inorganics7020016

Knežević NŽ, Đorđević S, Kojić V, Janaćković Đ. Functionalized Periodic Mesoporous Organosilica Nanoparticles for Loading and Delivery of Suramin. in Inorganics. 2019;7(2).
doi:10.3390/inorganics7020016 .

Knežević, Nikola Ž., Đorđević, Sanja, Kojić, Vesna, Janaćković, Đorđe, "Functionalized Periodic Mesoporous Organosilica Nanoparticles for Loading and Delivery of Suramin" in Inorganics, 7, no. 2 (2019),
https://doi.org/10.3390/inorganics7020016 . .

TY  - CONF
AU  - Veljović, Đorđe
AU  - Radovanović, Željko
AU  - Rogan, Jelena
AU  - Dapčević, Aleksandra
AU  - Dimitrijević-Branković, Suzana
AU  - Kojić, Vesna
AU  - Janaćković, Đorđe
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3760
AB  - Bioactive glasses have been used for over three decades in biomedical applications owing to high bioactivity, biocompatibility, as well as the possibility to stimulate regeneration of the bone. The aim of this work was to synthesized bioactive glasses, which contain lithium and strontium, by commercial method melting-quenching, as well as determining the properties, affected by mentioned ions. Differential thermal/thermogravimetric analysis, particle size distribution, energy-dispersive X-ray spectroscopy, inductively coupled plasma optical emission spectrometry, evaluation of the antimicrobial activity, in vitro bioactivity and biocompatibility test and scanning electron microscopy were used for characterization. The results showed that glass transition and crystallization temperatures are decreasing with addition of lithium and strontium ions. Furthermore, the samples showed high inhibition rate of Escherichia coli growth, as well as high bioactivity and biocompatibility. The crystal apatite layer, formed on the surface of synthesized glasses after seven days in simulated body fluid, differs in shape, size and interconnection of the glass particles, which depends on concentration of lithium and strontium ions.
PB  - Belgrade : Institute of Technical Sciences of SASA
C3  - Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and
T1  - Synthesis and characterization of bioactive glass doped with lithium and strontium ions
EP  - 20
SP  - 20
UR  - https://hdl.handle.net/21.15107/rcub_technorep_3760
ER  - 

@conference{
author = "Veljović, Đorđe and Radovanović, Željko and Rogan, Jelena and Dapčević, Aleksandra and Dimitrijević-Branković, Suzana and Kojić, Vesna and Janaćković, Đorđe",
year = "2018",
abstract = "Bioactive glasses have been used for over three decades in biomedical applications owing to high bioactivity, biocompatibility, as well as the possibility to stimulate regeneration of the bone. The aim of this work was to synthesized bioactive glasses, which contain lithium and strontium, by commercial method melting-quenching, as well as determining the properties, affected by mentioned ions. Differential thermal/thermogravimetric analysis, particle size distribution, energy-dispersive X-ray spectroscopy, inductively coupled plasma optical emission spectrometry, evaluation of the antimicrobial activity, in vitro bioactivity and biocompatibility test and scanning electron microscopy were used for characterization. The results showed that glass transition and crystallization temperatures are decreasing with addition of lithium and strontium ions. Furthermore, the samples showed high inhibition rate of Escherichia coli growth, as well as high bioactivity and biocompatibility. The crystal apatite layer, formed on the surface of synthesized glasses after seven days in simulated body fluid, differs in shape, size and interconnection of the glass particles, which depends on concentration of lithium and strontium ions.",
publisher = "Belgrade : Institute of Technical Sciences of SASA",
journal = "Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and",
title = "Synthesis and characterization of bioactive glass doped with lithium and strontium ions",
pages = "20-20",
url = "https://hdl.handle.net/21.15107/rcub_technorep_3760"
}

Veljović, Đ., Radovanović, Ž., Rogan, J., Dapčević, A., Dimitrijević-Branković, S., Kojić, V.,& Janaćković, Đ.. (2018). Synthesis and characterization of bioactive glass doped with lithium and strontium ions. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and
Belgrade : Institute of Technical Sciences of SASA., 20-20.
https://hdl.handle.net/21.15107/rcub_technorep_3760

Veljović Đ, Radovanović Ž, Rogan J, Dapčević A, Dimitrijević-Branković S, Kojić V, Janaćković Đ. Synthesis and characterization of bioactive glass doped with lithium and strontium ions. in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and. 2018;:20-20.
https://hdl.handle.net/21.15107/rcub_technorep_3760 .

Veljović, Đorđe, Radovanović, Željko, Rogan, Jelena, Dapčević, Aleksandra, Dimitrijević-Branković, Suzana, Kojić, Vesna, Janaćković, Đorđe, "Synthesis and characterization of bioactive glass doped with lithium and strontium ions" in Program and the Book of Abstracts / Seventeenth Young Researchers' Conference Materials Sciences and (2018):20-20,
https://hdl.handle.net/21.15107/rcub_technorep_3760 .

TY  - CONF
AU  - Đokić, Veljko
AU  - Barjaktarević, Dragana
AU  - Veljović, Đorđe
AU  - Dimić, Ivana
AU  - Kojić, Vesna
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5256
AB  - To improve their biological properties, biomaterials typically need some surface modification. These surface modifications can be classified into four categories: physical, chemical, mechanical and biochemical. One of the most commonly used methods is the electrochemical anodization, which is a simple process used to form nanotubular oxide layer on the metal surface by oxidation. In the present study, nanotubular oxide layer was formed on coarse-grained (CG) Ti-13Nb-13Zr alloy and ultrafine-grained (UFG) Ti-13Nb-13Zr alloy, obtained by high pressure torsion, using electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 minutes and 90 minutes. The scanning electron microscope (SEM) was used to characterize the surface and it showed that homogenous nanotubular layers were obtained by anodization during 90 minutes, while anodization during 60 minutes produced inhomogeneous nanotubular oxide layer. Also, the results show that the nanotubular oxide layer on the UFG Ti-13Nb-13Zr was more homogeneous then the one on CG material. The aim of this study is to determine the in vitro biocompatibility of the titanium alloy before and after electrochemical anodization during 90 minutes. In vitro nanotubular oxide layer examinations were performed on the human (MRC-5) and animal (L929) fibroblast cells lines. The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Results show that nanotubular oxide layer formed on the UFG Ti-13Nb-13Zr alloy during 90 minutes allow better cells contact and spreading along nanotubular surface.
PB  - Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018
C3  - Materials Research Society of Srebia
T1  - Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy
SP  - 139
UR  - https://hdl.handle.net/21.15107/rcub_technorep_5256
ER  - 

@conference{
author = "Đokić, Veljko and Barjaktarević, Dragana and Veljović, Đorđe and Dimić, Ivana and Kojić, Vesna and Rakin, Marko",
year = "2018",
abstract = "To improve their biological properties, biomaterials typically need some surface modification. These surface modifications can be classified into four categories: physical, chemical, mechanical and biochemical. One of the most commonly used methods is the electrochemical anodization, which is a simple process used to form nanotubular oxide layer on the metal surface by oxidation. In the present study, nanotubular oxide layer was formed on coarse-grained (CG) Ti-13Nb-13Zr alloy and ultrafine-grained (UFG) Ti-13Nb-13Zr alloy, obtained by high pressure torsion, using electrochemical anodization in the 1M H3PO4 + NaF electrolyte, during 60 minutes and 90 minutes. The scanning electron microscope (SEM) was used to characterize the surface and it showed that homogenous nanotubular layers were obtained by anodization during 90 minutes, while anodization during 60 minutes produced inhomogeneous nanotubular oxide layer. Also, the results show that the nanotubular oxide layer on the UFG Ti-13Nb-13Zr was more homogeneous then the one on CG material. The aim of this study is to determine the in vitro biocompatibility of the titanium alloy before and after electrochemical anodization during 90 minutes. In vitro nanotubular oxide layer examinations were performed on the human (MRC-5) and animal (L929) fibroblast cells lines. The cytotoxicity of the examined materials was measured as a percent of cell growth inhibition using in vitro colorimetric methyl-thiazol-tetrazolium (MTT) test. Results show that nanotubular oxide layer formed on the UFG Ti-13Nb-13Zr alloy during 90 minutes allow better cells contact and spreading along nanotubular surface.",
publisher = "Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018",
journal = "Materials Research Society of Srebia",
title = "Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy",
pages = "139",
url = "https://hdl.handle.net/21.15107/rcub_technorep_5256"
}

Đokić, V., Barjaktarević, D., Veljović, Đ., Dimić, I., Kojić, V.,& Rakin, M.. (2018). Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy. in Materials Research Society of Srebia
Programme and The Book of Abstracts, TWENTIETH ANNUAL CONFERENCE YUCOMAT 2018., 139.
https://hdl.handle.net/21.15107/rcub_technorep_5256

Đokić V, Barjaktarević D, Veljović Đ, Dimić I, Kojić V, Rakin M. Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy. in Materials Research Society of Srebia. 2018;:139.
https://hdl.handle.net/21.15107/rcub_technorep_5256 .

Đokić, Veljko, Barjaktarević, Dragana, Veljović, Đorđe, Dimić, Ivana, Kojić, Vesna, Rakin, Marko, "Improvement of Biocompatibility by Formation of Nanotubular Oxide Layer on the Ultrafine Grained Ti-13Nb-13Zr Alloy" in Materials Research Society of Srebia (2018):139,
https://hdl.handle.net/21.15107/rcub_technorep_5256 .

TY  - JOUR
AU  - Dimić, Ivana
AU  - Cvijović-Alagić, Ivana
AU  - Hohenwarter, Anton
AU  - Pippan, Reinhard
AU  - Kojić, Vesna
AU  - Bajat, Jelena
AU  - Rakin, Marko
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3963
AB  - The purpose of this study was to estimate the electrochemical behavior and biocompatibility of ultrafine-grained (UFG) commercially pure titanium (CPTi) and Ti-13Nb-13Zr (TNZ) alloy obtained by high-pressure torsion process. Electrochemical behavior of materials in artificial saliva at 37 degrees C was evaluated by potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS), and the obtained results indicated that UFG TNZ alloy showed corrosion current density (j(corr)=53 +/- 5 nA cm(-2)) which was 2 times lower compared to coarse-grained (CG) TNZ alloy (j(corr)=110 +/- 12 nA cm(-2)) and higher corrosion resistance, while UFG CPTi and CPTi showed approximately the same corrosion rate (mean j(corr) approximate to 38-40 nA cm(-2)). Static immersion test in artificial saliva, performed in this study, showed that the released ion concentrations from UFG materials were more than 10 times lower than the permitted concentration (the highest released Ti ion concentration from UFG CPTi and UFG TNZ alloy was 1.12 and 1.28 ppb, respectively, while permitted concentration was 15.5 ppb). The in vitro cytotoxicity tests, as the initial phase of the biocompatibility evaluation, showed that the fraction of surviving cells in all examined materials was much higher compared to the control sample and hence demonstrated absence of cytotoxicity and an increase of fibroblast cells adhesion on UFG materials surfaces. UFG CPTi and UFG TNZ alloy can be considered as promising materials for applications in dentistry due to high corrosion resistance and outstanding biocompatibility which were shown in this study.
PB  - Wiley, Hoboken
T2  - Journal of Biomedical Materials Research Part B-Applied Biomaterials
T1  - Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy
EP  - 1107
IS  - 3
SP  - 1097
VL  - 106
DO  - 10.1002/jbm.b.33919
ER  - 

@article{
author = "Dimić, Ivana and Cvijović-Alagić, Ivana and Hohenwarter, Anton and Pippan, Reinhard and Kojić, Vesna and Bajat, Jelena and Rakin, Marko",
year = "2018",
abstract = "The purpose of this study was to estimate the electrochemical behavior and biocompatibility of ultrafine-grained (UFG) commercially pure titanium (CPTi) and Ti-13Nb-13Zr (TNZ) alloy obtained by high-pressure torsion process. Electrochemical behavior of materials in artificial saliva at 37 degrees C was evaluated by potentiodynamic polarization tests and electrochemical impedance spectroscopy (EIS), and the obtained results indicated that UFG TNZ alloy showed corrosion current density (j(corr)=53 +/- 5 nA cm(-2)) which was 2 times lower compared to coarse-grained (CG) TNZ alloy (j(corr)=110 +/- 12 nA cm(-2)) and higher corrosion resistance, while UFG CPTi and CPTi showed approximately the same corrosion rate (mean j(corr) approximate to 38-40 nA cm(-2)). Static immersion test in artificial saliva, performed in this study, showed that the released ion concentrations from UFG materials were more than 10 times lower than the permitted concentration (the highest released Ti ion concentration from UFG CPTi and UFG TNZ alloy was 1.12 and 1.28 ppb, respectively, while permitted concentration was 15.5 ppb). The in vitro cytotoxicity tests, as the initial phase of the biocompatibility evaluation, showed that the fraction of surviving cells in all examined materials was much higher compared to the control sample and hence demonstrated absence of cytotoxicity and an increase of fibroblast cells adhesion on UFG materials surfaces. UFG CPTi and UFG TNZ alloy can be considered as promising materials for applications in dentistry due to high corrosion resistance and outstanding biocompatibility which were shown in this study.",
publisher = "Wiley, Hoboken",
journal = "Journal of Biomedical Materials Research Part B-Applied Biomaterials",
title = "Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy",
pages = "1107-1097",
number = "3",
volume = "106",
doi = "10.1002/jbm.b.33919"
}

Dimić, I., Cvijović-Alagić, I., Hohenwarter, A., Pippan, R., Kojić, V., Bajat, J.,& Rakin, M.. (2018). Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy. in Journal of Biomedical Materials Research Part B-Applied Biomaterials
Wiley, Hoboken., 106(3), 1097-1107.
https://doi.org/10.1002/jbm.b.33919

Dimić I, Cvijović-Alagić I, Hohenwarter A, Pippan R, Kojić V, Bajat J, Rakin M. Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy. in Journal of Biomedical Materials Research Part B-Applied Biomaterials. 2018;106(3):1097-1107.
doi:10.1002/jbm.b.33919 .

Dimić, Ivana, Cvijović-Alagić, Ivana, Hohenwarter, Anton, Pippan, Reinhard, Kojić, Vesna, Bajat, Jelena, Rakin, Marko, "Electrochemical and biocompatibility examinations of high-pressure torsion processed titanium and Ti-13Nb-13Zr alloy" in Journal of Biomedical Materials Research Part B-Applied Biomaterials, 106, no. 3 (2018):1097-1107,
https://doi.org/10.1002/jbm.b.33919 . .

TY  - JOUR
AU  - Stevanović, Milena
AU  - Đošić, Marija
AU  - Janković, Ana
AU  - Kojić, Vesna
AU  - Vukašinović-Sekulić, Maja
AU  - Stojanović, Jovica
AU  - Odović, Jadranka
AU  - Crevar-Sakač, Milkica
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3899
AB  - Composite coating of antibiotic gentamicin (Gent), natural polymer chitosan (CS), and hydroxyapatite (HAP) was successfully assessed by applying the electrophoretic deposition (EPD) technique. EPD was performed under optimized deposition conditions (5 V, 12 min) on pure titanium plates, to obtain HAP/CS and HAP/CS/Gent composite coatings in a single step from three-component aqueous suspension, with favorable antibacterial properties. Composite coatings were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray photoelectron analysis, confirming the formation of composite HAP/CS and HAP/CS/Gent coatings on the titanium surface, which is due to intermolecular hydrogen bonds. Employing the XRD technique, HAP was detected by obtaining the characteristic diffraction maximums. Good antibacterial activity of the composite coating loaded with antibiotic (HAP/CS/Gent) was confirmed against Staphylococcus aureus and Escherichia coli, pointing to the high potential for bioapplication. Introduction of gentamicin in HAP/CS/Gent coating caused very mild cytotoxicity in the tested cell lines MRC-5 and L929. MTT testing was used to evaluate cell viability, and HAP/CS was classified as noncytotoxic.
PB  - Amer Chemical Soc, Washington
T2  - ACS Biomaterials Science & Engineering
T1  - Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium
EP  - 4007
IS  - 12
SP  - 3994
VL  - 4
DO  - 10.1021/acsbiomaterials.8b00859
ER  - 

@article{
author = "Stevanović, Milena and Đošić, Marija and Janković, Ana and Kojić, Vesna and Vukašinović-Sekulić, Maja and Stojanović, Jovica and Odović, Jadranka and Crevar-Sakač, Milkica and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2018",
abstract = "Composite coating of antibiotic gentamicin (Gent), natural polymer chitosan (CS), and hydroxyapatite (HAP) was successfully assessed by applying the electrophoretic deposition (EPD) technique. EPD was performed under optimized deposition conditions (5 V, 12 min) on pure titanium plates, to obtain HAP/CS and HAP/CS/Gent composite coatings in a single step from three-component aqueous suspension, with favorable antibacterial properties. Composite coatings were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis, and X-ray photoelectron analysis, confirming the formation of composite HAP/CS and HAP/CS/Gent coatings on the titanium surface, which is due to intermolecular hydrogen bonds. Employing the XRD technique, HAP was detected by obtaining the characteristic diffraction maximums. Good antibacterial activity of the composite coating loaded with antibiotic (HAP/CS/Gent) was confirmed against Staphylococcus aureus and Escherichia coli, pointing to the high potential for bioapplication. Introduction of gentamicin in HAP/CS/Gent coating caused very mild cytotoxicity in the tested cell lines MRC-5 and L929. MTT testing was used to evaluate cell viability, and HAP/CS was classified as noncytotoxic.",
publisher = "Amer Chemical Soc, Washington",
journal = "ACS Biomaterials Science & Engineering",
title = "Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium",
pages = "4007-3994",
number = "12",
volume = "4",
doi = "10.1021/acsbiomaterials.8b00859"
}

Stevanović, M., Đošić, M., Janković, A., Kojić, V., Vukašinović-Sekulić, M., Stojanović, J., Odović, J., Crevar-Sakač, M., Rhee, K. Y.,& Mišković-Stanković, V.. (2018). Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium. in ACS Biomaterials Science & Engineering
Amer Chemical Soc, Washington., 4(12), 3994-4007.
https://doi.org/10.1021/acsbiomaterials.8b00859

Stevanović M, Đošić M, Janković A, Kojić V, Vukašinović-Sekulić M, Stojanović J, Odović J, Crevar-Sakač M, Rhee KY, Mišković-Stanković V. Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium. in ACS Biomaterials Science & Engineering. 2018;4(12):3994-4007.
doi:10.1021/acsbiomaterials.8b00859 .

Stevanović, Milena, Đošić, Marija, Janković, Ana, Kojić, Vesna, Vukašinović-Sekulić, Maja, Stojanović, Jovica, Odović, Jadranka, Crevar-Sakač, Milkica, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Gentamicin-Loaded Bioactive Hydroxyapatite/Chitosan Composite Coating Electrodeposited on Titanium" in ACS Biomaterials Science & Engineering, 4, no. 12 (2018):3994-4007,
https://doi.org/10.1021/acsbiomaterials.8b00859 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Janković, Ana
AU  - Kojić, Vesna
AU  - Vukašinović-Sekulić, Maja
AU  - Perić-Grujić, Aleksandra
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3942
AB  - This study presents the synthesis of novel silver/poly(vinyl alcohol)/chitosan/graphene (Ag/PVA/CHI/Gr) nanocomposite hydrogels by in situ electrochemical reduction of silver ions in the hydrogel matrix and their thorough characterization by UV-visible and Raman spectroscopies, field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and silver release measurements. The influence of chitosan content on the incorporation and stabilization of silver nanoparticles (AgNPs) was investigated, and we found that hydrogels with higher chitosan content contain higher amounts of AgNPs. In addition, the cytotoxicity and antibacterial activity of Ag/PVA/CHI/Gr nanocomposite hydrogels were evaluated. Based on in vitro investigations, the obtained materials exhibit diffusion-controlled release profiles over 28 days, strong antibacterial activity against Staphylococcus aureus and Escherichia coli bacterial strains, and no cytotoxicity toward human and mice fibroblast cell lines.
PB  - Elsevier Sci Ltd, Oxford
T2  - Composites Part B-Engineering
T1  - Silver/poly(vinyl alcohol)/chitosan/graphene hydrogels - Synthesis, biological and physicochemical properties and silver release kinetics
EP  - 185
SP  - 175
VL  - 154
DO  - 10.1016/j.compositesb.2018.08.005
ER  - 

@article{
author = "Nešović, Katarina and Janković, Ana and Kojić, Vesna and Vukašinović-Sekulić, Maja and Perić-Grujić, Aleksandra and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2018",
abstract = "This study presents the synthesis of novel silver/poly(vinyl alcohol)/chitosan/graphene (Ag/PVA/CHI/Gr) nanocomposite hydrogels by in situ electrochemical reduction of silver ions in the hydrogel matrix and their thorough characterization by UV-visible and Raman spectroscopies, field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and silver release measurements. The influence of chitosan content on the incorporation and stabilization of silver nanoparticles (AgNPs) was investigated, and we found that hydrogels with higher chitosan content contain higher amounts of AgNPs. In addition, the cytotoxicity and antibacterial activity of Ag/PVA/CHI/Gr nanocomposite hydrogels were evaluated. Based on in vitro investigations, the obtained materials exhibit diffusion-controlled release profiles over 28 days, strong antibacterial activity against Staphylococcus aureus and Escherichia coli bacterial strains, and no cytotoxicity toward human and mice fibroblast cell lines.",
publisher = "Elsevier Sci Ltd, Oxford",
journal = "Composites Part B-Engineering",
title = "Silver/poly(vinyl alcohol)/chitosan/graphene hydrogels - Synthesis, biological and physicochemical properties and silver release kinetics",
pages = "185-175",
volume = "154",
doi = "10.1016/j.compositesb.2018.08.005"
}

Nešović, K., Janković, A., Kojić, V., Vukašinović-Sekulić, M., Perić-Grujić, A., Rhee, K. Y.,& Mišković-Stanković, V.. (2018). Silver/poly(vinyl alcohol)/chitosan/graphene hydrogels - Synthesis, biological and physicochemical properties and silver release kinetics. in Composites Part B-Engineering
Elsevier Sci Ltd, Oxford., 154, 175-185.
https://doi.org/10.1016/j.compositesb.2018.08.005

Nešović K, Janković A, Kojić V, Vukašinović-Sekulić M, Perić-Grujić A, Rhee KY, Mišković-Stanković V. Silver/poly(vinyl alcohol)/chitosan/graphene hydrogels - Synthesis, biological and physicochemical properties and silver release kinetics. in Composites Part B-Engineering. 2018;154:175-185.
doi:10.1016/j.compositesb.2018.08.005 .

Nešović, Katarina, Janković, Ana, Kojić, Vesna, Vukašinović-Sekulić, Maja, Perić-Grujić, Aleksandra, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Silver/poly(vinyl alcohol)/chitosan/graphene hydrogels - Synthesis, biological and physicochemical properties and silver release kinetics" in Composites Part B-Engineering, 154 (2018):175-185,
https://doi.org/10.1016/j.compositesb.2018.08.005 . .

TY  - JOUR
AU  - Milošević, Nataša P.
AU  - Kojić, Vesna
AU  - Curcić, Jelena
AU  - Jakimov, Dimitar
AU  - Milić, Nataša
AU  - Banjac, Nebojša
AU  - Ušćumlić, Gordana
AU  - Kaliszan, Roman
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5819
AB  - Design of a new drug entity is usually preceded by analysis of quantitative structure activity (properties) relationships, QSA(P)R. Six newly synthesized succinimide derivatives have been determined for (i) in silico physico-chemical descriptors, pharmacokinetic and toxicity predictors, (ii) in vitro biological activity on four different carcinoma cell lines and on normal fetal lung cells and (iii) lipophilicity on liquid chromatography. All compounds observed were predicted for good permeability and solubility, good oral absorption rate and moderate volume of distribution as well as for modest blood brain permeation, followed by acceptable observed toxicity. In silico determined lipophilicity, permeability through jejunum and aqueous solubility were correlated with experimentally obtained lipophilic constants (by use of high pressure liquid chromatography) and linear correlations were obtained. Absorption rate and volume of distribution were predicted by chromatographic lipophilicity measurements while permeation through blood bran barrier was predicted dominantly by molecular size defined with molecular weight. Five compounds have demonstrated antiproliferative activity toward cervix carcinoma HeLa cell lines; three were cytotoxic against breast carcinoma MCF-7 cells, while one inhibited proliferation of colon carcinoma HT 29 cell lines. Only one compound was cytotoxic toward normal cell lines, while other compounds were proven as safe. Antiproliferative potential against HeLa cells was described as exponential function of lipophilicity. Based on obtained results, lead compounds were selected.
PB  - Elsevier Science Bv, Amsterdam
T2  - Journal of Pharmaceutical and Biomedical Analysis
T1  - Evaluation of in silico pharmacokinetic properties and in vitro cytotoxic activity of selected newly synthesized N-succinimide derivatives
EP  - 257
SP  - 252
VL  - 137
DO  - 10.1016/j.jpba.2017.01.042
ER  - 

@article{
author = "Milošević, Nataša P. and Kojić, Vesna and Curcić, Jelena and Jakimov, Dimitar and Milić, Nataša and Banjac, Nebojša and Ušćumlić, Gordana and Kaliszan, Roman",
year = "2017",
abstract = "Design of a new drug entity is usually preceded by analysis of quantitative structure activity (properties) relationships, QSA(P)R. Six newly synthesized succinimide derivatives have been determined for (i) in silico physico-chemical descriptors, pharmacokinetic and toxicity predictors, (ii) in vitro biological activity on four different carcinoma cell lines and on normal fetal lung cells and (iii) lipophilicity on liquid chromatography. All compounds observed were predicted for good permeability and solubility, good oral absorption rate and moderate volume of distribution as well as for modest blood brain permeation, followed by acceptable observed toxicity. In silico determined lipophilicity, permeability through jejunum and aqueous solubility were correlated with experimentally obtained lipophilic constants (by use of high pressure liquid chromatography) and linear correlations were obtained. Absorption rate and volume of distribution were predicted by chromatographic lipophilicity measurements while permeation through blood bran barrier was predicted dominantly by molecular size defined with molecular weight. Five compounds have demonstrated antiproliferative activity toward cervix carcinoma HeLa cell lines; three were cytotoxic against breast carcinoma MCF-7 cells, while one inhibited proliferation of colon carcinoma HT 29 cell lines. Only one compound was cytotoxic toward normal cell lines, while other compounds were proven as safe. Antiproliferative potential against HeLa cells was described as exponential function of lipophilicity. Based on obtained results, lead compounds were selected.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Journal of Pharmaceutical and Biomedical Analysis",
title = "Evaluation of in silico pharmacokinetic properties and in vitro cytotoxic activity of selected newly synthesized N-succinimide derivatives",
pages = "257-252",
volume = "137",
doi = "10.1016/j.jpba.2017.01.042"
}

Milošević, N. P., Kojić, V., Curcić, J., Jakimov, D., Milić, N., Banjac, N., Ušćumlić, G.,& Kaliszan, R.. (2017). Evaluation of in silico pharmacokinetic properties and in vitro cytotoxic activity of selected newly synthesized N-succinimide derivatives. in Journal of Pharmaceutical and Biomedical Analysis
Elsevier Science Bv, Amsterdam., 137, 252-257.
https://doi.org/10.1016/j.jpba.2017.01.042

Milošević NP, Kojić V, Curcić J, Jakimov D, Milić N, Banjac N, Ušćumlić G, Kaliszan R. Evaluation of in silico pharmacokinetic properties and in vitro cytotoxic activity of selected newly synthesized N-succinimide derivatives. in Journal of Pharmaceutical and Biomedical Analysis. 2017;137:252-257.
doi:10.1016/j.jpba.2017.01.042 .

Milošević, Nataša P., Kojić, Vesna, Curcić, Jelena, Jakimov, Dimitar, Milić, Nataša, Banjac, Nebojša, Ušćumlić, Gordana, Kaliszan, Roman, "Evaluation of in silico pharmacokinetic properties and in vitro cytotoxic activity of selected newly synthesized N-succinimide derivatives" in Journal of Pharmaceutical and Biomedical Analysis, 137 (2017):252-257,
https://doi.org/10.1016/j.jpba.2017.01.042 . .

TY  - JOUR
AU  - Nešović, Katarina
AU  - Kojić, Vesna
AU  - Rhee, Kyong Yop
AU  - Mišković-Stanković, Vesna
PY  - 2017
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3623
AB  - In this paper, novel silver-doped poly(vinyl alcohol)/chitosan/graphene (Ag/PVA/CHI/Gr) nanocomposites were produced by in situ electrochemical synthesis of silver nanoparticles in the polyvinyl alcohol/chitosan/graphene (PVA/CHI/Gr) matrix. The presence of silver nanoparticles, as an antibacterial agent, was proven by ultraviolet-visible spectroscopy. The synthesized nanocomposites were further characterized by scanning electron microscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. Thermal stability was investigated using thermogravimetric analysis, while electrochemical properties of PVA/CHI/Gr and Ag/PVA/CHI/Gr were examined by cyclic voltammetry. It was suggested that silver nanoparticles were embedded in the PVA/CHI/Gr matrix as a result of chemical bonding with hydroxyl groups of PVA and amine and hydroxyl groups of CHI, and have improved thermal stability of PVA/CHI/Gr hydrogel.
PB  - Natl Assoc Corrosion Eng, Houston
T2  - Corrosion
T1  - Electrochemical Synthesis and Characterization of Silver Doped Poly(vinyl alcohol)/Chitosan Hydrogels
IS  - 12
VL  - 73
DO  - 10.5006/2507
ER  - 

@article{
author = "Nešović, Katarina and Kojić, Vesna and Rhee, Kyong Yop and Mišković-Stanković, Vesna",
year = "2017",
abstract = "In this paper, novel silver-doped poly(vinyl alcohol)/chitosan/graphene (Ag/PVA/CHI/Gr) nanocomposites were produced by in situ electrochemical synthesis of silver nanoparticles in the polyvinyl alcohol/chitosan/graphene (PVA/CHI/Gr) matrix. The presence of silver nanoparticles, as an antibacterial agent, was proven by ultraviolet-visible spectroscopy. The synthesized nanocomposites were further characterized by scanning electron microscopy, Raman spectroscopy, and x-ray photoelectron spectroscopy. Thermal stability was investigated using thermogravimetric analysis, while electrochemical properties of PVA/CHI/Gr and Ag/PVA/CHI/Gr were examined by cyclic voltammetry. It was suggested that silver nanoparticles were embedded in the PVA/CHI/Gr matrix as a result of chemical bonding with hydroxyl groups of PVA and amine and hydroxyl groups of CHI, and have improved thermal stability of PVA/CHI/Gr hydrogel.",
publisher = "Natl Assoc Corrosion Eng, Houston",
journal = "Corrosion",
title = "Electrochemical Synthesis and Characterization of Silver Doped Poly(vinyl alcohol)/Chitosan Hydrogels",
number = "12",
volume = "73",
doi = "10.5006/2507"
}

Nešović, K., Kojić, V., Rhee, K. Y.,& Mišković-Stanković, V.. (2017). Electrochemical Synthesis and Characterization of Silver Doped Poly(vinyl alcohol)/Chitosan Hydrogels. in Corrosion
Natl Assoc Corrosion Eng, Houston., 73(12).
https://doi.org/10.5006/2507

Nešović K, Kojić V, Rhee KY, Mišković-Stanković V. Electrochemical Synthesis and Characterization of Silver Doped Poly(vinyl alcohol)/Chitosan Hydrogels. in Corrosion. 2017;73(12).
doi:10.5006/2507 .

Nešović, Katarina, Kojić, Vesna, Rhee, Kyong Yop, Mišković-Stanković, Vesna, "Electrochemical Synthesis and Characterization of Silver Doped Poly(vinyl alcohol)/Chitosan Hydrogels" in Corrosion, 73, no. 12 (2017),
https://doi.org/10.5006/2507 . .

TY  - JOUR
AU  - Radovanović, Željko
AU  - Jokić, Bojan
AU  - Veljović, Đorđe
AU  - Dimitrijević, Suzana
AU  - Kojić, Vesna
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2014
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2821
AB  - Hydroxyapatite (HAp) powders doped with Ag+ or Cu2+ were synthesized by a hydrothermal method in order to obtain biomaterial with an antimicrobial effect. The synthesis was performed with two contents of dopant (Ag+ or Cu2+) by considering both the antimicrobial activities and biocompatibility of the powders. The doped HAp was annealed at 1200 C for 2 h with the intention of investigating the influence of doping with Ag+ and Cu2+ on the creation of the biphasic HAp/alpha-tricalcium phosphate (HAp/a-TCP) and determining the antimicrobial activity and biocompatibility of the obtained biphasic powders. Analyses of all powders, undoped and doped HAp and HAp/a-TCP, were performed by Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), atomic absorption spectroscopy (AAS) and energydispersive X-ray spectroscopy (EDS). The in vitro antibacterial activities of the powders were evaluated against: Staphylococcus aureus, Escherichia co li, Pseudomonas aeruginosa and Candida albi cans. All powders showed good antimicrobial activity but generally the powders of doped HAp/a-TCP had more uniform results against all pathogenic microorganisms than the powders of doped HAp. In vitro biocompatibility tests, MU and DET, were used to evaluate the biocompatibility of Ag+- and Cu2+-doped HAp/a-TCP with MRC-5 human fibroblast cells. These tests confirmed that powders do not have a cytotoxic effect. The HAp/a-TCP powders doped with the lower content of Ag+ and Cu2+ showed especially good biocompatibility. Antimicrobial and biocompatibility tests recommend the Ag+- and Cu2+-doped HAp/a-TCP as promising material for use in reconstructive surgery of bone.
PB  - Elsevier Science Bv, Amsterdam
T2  - Applied Surface Science
T1  - Antimicrobial activity and biocompatibility of Ag--(+) and Cu2+ -doped biphasic hydroxyapatite/alpha-tricalcium phosphate obtained from hydrothermally synthesized Ag+- and Cu2+ -doped hydroxyapatite
EP  - 519
SP  - 513
VL  - 307
DO  - 10.1016/j.apsusc.2014.04.066
ER  - 

@article{
author = "Radovanović, Željko and Jokić, Bojan and Veljović, Đorđe and Dimitrijević, Suzana and Kojić, Vesna and Petrović, Rada and Janaćković, Đorđe",
year = "2014",
abstract = "Hydroxyapatite (HAp) powders doped with Ag+ or Cu2+ were synthesized by a hydrothermal method in order to obtain biomaterial with an antimicrobial effect. The synthesis was performed with two contents of dopant (Ag+ or Cu2+) by considering both the antimicrobial activities and biocompatibility of the powders. The doped HAp was annealed at 1200 C for 2 h with the intention of investigating the influence of doping with Ag+ and Cu2+ on the creation of the biphasic HAp/alpha-tricalcium phosphate (HAp/a-TCP) and determining the antimicrobial activity and biocompatibility of the obtained biphasic powders. Analyses of all powders, undoped and doped HAp and HAp/a-TCP, were performed by Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), atomic absorption spectroscopy (AAS) and energydispersive X-ray spectroscopy (EDS). The in vitro antibacterial activities of the powders were evaluated against: Staphylococcus aureus, Escherichia co li, Pseudomonas aeruginosa and Candida albi cans. All powders showed good antimicrobial activity but generally the powders of doped HAp/a-TCP had more uniform results against all pathogenic microorganisms than the powders of doped HAp. In vitro biocompatibility tests, MU and DET, were used to evaluate the biocompatibility of Ag+- and Cu2+-doped HAp/a-TCP with MRC-5 human fibroblast cells. These tests confirmed that powders do not have a cytotoxic effect. The HAp/a-TCP powders doped with the lower content of Ag+ and Cu2+ showed especially good biocompatibility. Antimicrobial and biocompatibility tests recommend the Ag+- and Cu2+-doped HAp/a-TCP as promising material for use in reconstructive surgery of bone.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Applied Surface Science",
title = "Antimicrobial activity and biocompatibility of Ag--(+) and Cu2+ -doped biphasic hydroxyapatite/alpha-tricalcium phosphate obtained from hydrothermally synthesized Ag+- and Cu2+ -doped hydroxyapatite",
pages = "519-513",
volume = "307",
doi = "10.1016/j.apsusc.2014.04.066"
}

Radovanović, Ž., Jokić, B., Veljović, Đ., Dimitrijević, S., Kojić, V., Petrović, R.,& Janaćković, Đ.. (2014). Antimicrobial activity and biocompatibility of Ag--(+) and Cu2+ -doped biphasic hydroxyapatite/alpha-tricalcium phosphate obtained from hydrothermally synthesized Ag+- and Cu2+ -doped hydroxyapatite. in Applied Surface Science
Elsevier Science Bv, Amsterdam., 307, 513-519.
https://doi.org/10.1016/j.apsusc.2014.04.066

Radovanović Ž, Jokić B, Veljović Đ, Dimitrijević S, Kojić V, Petrović R, Janaćković Đ. Antimicrobial activity and biocompatibility of Ag--(+) and Cu2+ -doped biphasic hydroxyapatite/alpha-tricalcium phosphate obtained from hydrothermally synthesized Ag+- and Cu2+ -doped hydroxyapatite. in Applied Surface Science. 2014;307:513-519.
doi:10.1016/j.apsusc.2014.04.066 .

Radovanović, Željko, Jokić, Bojan, Veljović, Đorđe, Dimitrijević, Suzana, Kojić, Vesna, Petrović, Rada, Janaćković, Đorđe, "Antimicrobial activity and biocompatibility of Ag--(+) and Cu2+ -doped biphasic hydroxyapatite/alpha-tricalcium phosphate obtained from hydrothermally synthesized Ag+- and Cu2+ -doped hydroxyapatite" in Applied Surface Science, 307 (2014):513-519,
https://doi.org/10.1016/j.apsusc.2014.04.066 . .

TY  - JOUR
AU  - Radovanović, Željko
AU  - Veljović, Đorđe
AU  - Jokić, Bojan
AU  - Dimitrijević, Suzana
AU  - Bogdanović, Gordana
AU  - Kojić, Vesna
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2096
AB  - In order to obtain multifunctional materials with good biocompatibility and antimicrobial effect, hydroxyapatite (HAp) doped with Zn2+ was synthesized by a hydrothermal method. Powders with different content of zinc ions were synthesized and compared with undoped HAp to investigate the influence of Zn2+ on the antimicrobial activity of HAp. Analyses of undoped and Zn2+-doped powders before and after thermal treatment at 1200°C were performed by SEM and XRD. The antimicrobial effects of the powders were examined in relation to Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans in liquid medium. The results showed that the obtained powders had good antimicrobial activity, but higher antimicrobial activities of the powders doped with Zn2+ were observed after annealing at 1200°C. For powders annealed at 1200°C, in vitro biocompatibility tests: reduction of the tetrazolium salt 3-(4,5-dimethylthazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT test) and Trypan Blue dye exclusion test (DET test) with MRC-5 fibroblast cells in liquid medium were performed. Based on the MTT and DET tests, it was shown that the powders do not have a significant cytotoxic effect, which was confirmed by SEM analysis of MRC-5 fibroblast cells after their in vitro contact with the powders.
AB  - U cilju dobijanja multifunkcionalnih materijala sa dobrom biokompatibilnošću i dobrim antimikrobnim dejstvom, hidroksiapatit (HAp) sa ugrađenim Zn2+ sintetisan je hidrotermalnom metodom. Za potrebe istraživanja uticaja Zn2+ na anti-mikrobnu aktivnost, sintetisani su HAp prahovi sa različitim sadržajem Zn2+ i upoređeni sa čistim HAp. Čisti prahovi i oni sa ugrađenim cinkom, pre i posle termičkog tretmana na 1200°C, analizirani su skenirajućom elektronskom mikroskopijom (SEM) i metodom rendgenske difrakcije. Antimikrobni efekat prahova ispitivan je prema sojevima Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa i Candida albicans u tečnom medijumu. Antimikrobni test je pokazao da dobijeni prahovi imaju dobru antimikrobnu aktivnost. Poboljšana antimikrobna aktivnost prahova u koje je ugrađen Zn2+ postignuta je žarenjem na 1200°C. In vitro testovi biokompatibilnosti, MTT i DET, sa MRC-5 fibroblastnim ćelijama u tečnom medijumu urađeni su za prahove žarene na 1200°C. Na osnovu MTT i DET testova zaključeno je da prahovi nemaju značajan citotoksični uticaj što je potvrđeno SEM analizom MRC-5 fibroblastnih ćelija nakon njihovog in vitro kontakta sa prahovima.
PB  - Serbian Chemical Society, Belgrade
T2  - Journal of the Serbian Chemical Society
T1  - Biocompatibility and antimicrobial activity of zinc(II)-doped hydroxyapatite, synthesized by a hydrothermal method
T1  - Biokompatibilnost i antimikrobna aktivnost hidroksiapatita sa ugrađenim cinkom sintetisanog hidrotermalnom metodom
EP  - 1798
IS  - 12
SP  - 1787
VL  - 77
UR  - https://hdl.handle.net/21.15107/rcub_technorep_2096
ER  - 

@article{
author = "Radovanović, Željko and Veljović, Đorđe and Jokić, Bojan and Dimitrijević, Suzana and Bogdanović, Gordana and Kojić, Vesna and Petrović, Rada and Janaćković, Đorđe",
year = "2012",
abstract = "In order to obtain multifunctional materials with good biocompatibility and antimicrobial effect, hydroxyapatite (HAp) doped with Zn2+ was synthesized by a hydrothermal method. Powders with different content of zinc ions were synthesized and compared with undoped HAp to investigate the influence of Zn2+ on the antimicrobial activity of HAp. Analyses of undoped and Zn2+-doped powders before and after thermal treatment at 1200°C were performed by SEM and XRD. The antimicrobial effects of the powders were examined in relation to Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa and Candida albicans in liquid medium. The results showed that the obtained powders had good antimicrobial activity, but higher antimicrobial activities of the powders doped with Zn2+ were observed after annealing at 1200°C. For powders annealed at 1200°C, in vitro biocompatibility tests: reduction of the tetrazolium salt 3-(4,5-dimethylthazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT test) and Trypan Blue dye exclusion test (DET test) with MRC-5 fibroblast cells in liquid medium were performed. Based on the MTT and DET tests, it was shown that the powders do not have a significant cytotoxic effect, which was confirmed by SEM analysis of MRC-5 fibroblast cells after their in vitro contact with the powders., U cilju dobijanja multifunkcionalnih materijala sa dobrom biokompatibilnošću i dobrim antimikrobnim dejstvom, hidroksiapatit (HAp) sa ugrađenim Zn2+ sintetisan je hidrotermalnom metodom. Za potrebe istraživanja uticaja Zn2+ na anti-mikrobnu aktivnost, sintetisani su HAp prahovi sa različitim sadržajem Zn2+ i upoređeni sa čistim HAp. Čisti prahovi i oni sa ugrađenim cinkom, pre i posle termičkog tretmana na 1200°C, analizirani su skenirajućom elektronskom mikroskopijom (SEM) i metodom rendgenske difrakcije. Antimikrobni efekat prahova ispitivan je prema sojevima Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa i Candida albicans u tečnom medijumu. Antimikrobni test je pokazao da dobijeni prahovi imaju dobru antimikrobnu aktivnost. Poboljšana antimikrobna aktivnost prahova u koje je ugrađen Zn2+ postignuta je žarenjem na 1200°C. In vitro testovi biokompatibilnosti, MTT i DET, sa MRC-5 fibroblastnim ćelijama u tečnom medijumu urađeni su za prahove žarene na 1200°C. Na osnovu MTT i DET testova zaključeno je da prahovi nemaju značajan citotoksični uticaj što je potvrđeno SEM analizom MRC-5 fibroblastnih ćelija nakon njihovog in vitro kontakta sa prahovima.",
publisher = "Serbian Chemical Society, Belgrade",
journal = "Journal of the Serbian Chemical Society",
title = "Biocompatibility and antimicrobial activity of zinc(II)-doped hydroxyapatite, synthesized by a hydrothermal method, Biokompatibilnost i antimikrobna aktivnost hidroksiapatita sa ugrađenim cinkom sintetisanog hidrotermalnom metodom",
pages = "1798-1787",
number = "12",
volume = "77",
url = "https://hdl.handle.net/21.15107/rcub_technorep_2096"
}

Radovanović, Ž., Veljović, Đ., Jokić, B., Dimitrijević, S., Bogdanović, G., Kojić, V., Petrović, R.,& Janaćković, Đ.. (2012). Biocompatibility and antimicrobial activity of zinc(II)-doped hydroxyapatite, synthesized by a hydrothermal method. in Journal of the Serbian Chemical Society
Serbian Chemical Society, Belgrade., 77(12), 1787-1798.
https://hdl.handle.net/21.15107/rcub_technorep_2096

Radovanović Ž, Veljović Đ, Jokić B, Dimitrijević S, Bogdanović G, Kojić V, Petrović R, Janaćković Đ. Biocompatibility and antimicrobial activity of zinc(II)-doped hydroxyapatite, synthesized by a hydrothermal method. in Journal of the Serbian Chemical Society. 2012;77(12):1787-1798.
https://hdl.handle.net/21.15107/rcub_technorep_2096 .

Radovanović, Željko, Veljović, Đorđe, Jokić, Bojan, Dimitrijević, Suzana, Bogdanović, Gordana, Kojić, Vesna, Petrović, Rada, Janaćković, Đorđe, "Biocompatibility and antimicrobial activity of zinc(II)-doped hydroxyapatite, synthesized by a hydrothermal method" in Journal of the Serbian Chemical Society, 77, no. 12 (2012):1787-1798,
https://hdl.handle.net/21.15107/rcub_technorep_2096 .

TY  - JOUR
AU  - Veljović, Đorđe
AU  - Čolić, Miodrag
AU  - Kojić, Vesna
AU  - Bogdanović, Gordana
AU  - Kojić, Zvezdana
AU  - Banjac, Andrijana
AU  - Palcevskis, Eriks
AU  - Petrović, Rada
AU  - Janaćković, Đorđe
PY  - 2012
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/2174
AB  - The effect of decreasing the grain size on the biocompatibility, cellmaterial interface, and mechanical properties of microwave-sintered monophase hydroxyapatite bioceramics was investigated in this study. A nanosized stoichiometric hydroxyapatite powder was isostatically pressed at high pressure and sintered in a microwave furnace in order to obtain fine grained dense bioceramics. The samples sintered at 1200 degrees C, with a density near the theoretical one, were composed of micron-sized grains, while the grain size decreased to 130 nm on decreasing the sintering temperature to 900 degrees C. This decrease in the grain size certainly led to increases in the fracture toughness by much as 54%. An in vitro investigation of biocompatibility with L929 and human MRC-5 fibroblast cells showed noncytotoxic effects for both types of bioceramics, while the relative cell proliferation rate, cell attachment and metabolic activity of the fibroblasts were improved with decreasing of grain size. An initial in vivo investigation of biocompatibility by the primary cutaneous irritation test showed that both materials exhibited no irritation properties.
PB  - Wiley, Hoboken
T2  - Journal of Biomedical Materials Research Part A
T1  - The effect of grain size on the biocompatibility, cell-materials interface, and mechanical properties of microwave-sintered bioceramics
EP  - 3070
IS  - 11
SP  - 3059
VL  - 100A
DO  - 10.1002/jbm.a.34225
ER  - 

@article{
author = "Veljović, Đorđe and Čolić, Miodrag and Kojić, Vesna and Bogdanović, Gordana and Kojić, Zvezdana and Banjac, Andrijana and Palcevskis, Eriks and Petrović, Rada and Janaćković, Đorđe",
year = "2012",
abstract = "The effect of decreasing the grain size on the biocompatibility, cellmaterial interface, and mechanical properties of microwave-sintered monophase hydroxyapatite bioceramics was investigated in this study. A nanosized stoichiometric hydroxyapatite powder was isostatically pressed at high pressure and sintered in a microwave furnace in order to obtain fine grained dense bioceramics. The samples sintered at 1200 degrees C, with a density near the theoretical one, were composed of micron-sized grains, while the grain size decreased to 130 nm on decreasing the sintering temperature to 900 degrees C. This decrease in the grain size certainly led to increases in the fracture toughness by much as 54%. An in vitro investigation of biocompatibility with L929 and human MRC-5 fibroblast cells showed noncytotoxic effects for both types of bioceramics, while the relative cell proliferation rate, cell attachment and metabolic activity of the fibroblasts were improved with decreasing of grain size. An initial in vivo investigation of biocompatibility by the primary cutaneous irritation test showed that both materials exhibited no irritation properties.",
publisher = "Wiley, Hoboken",
journal = "Journal of Biomedical Materials Research Part A",
title = "The effect of grain size on the biocompatibility, cell-materials interface, and mechanical properties of microwave-sintered bioceramics",
pages = "3070-3059",
number = "11",
volume = "100A",
doi = "10.1002/jbm.a.34225"
}

Veljović, Đ., Čolić, M., Kojić, V., Bogdanović, G., Kojić, Z., Banjac, A., Palcevskis, E., Petrović, R.,& Janaćković, Đ.. (2012). The effect of grain size on the biocompatibility, cell-materials interface, and mechanical properties of microwave-sintered bioceramics. in Journal of Biomedical Materials Research Part A
Wiley, Hoboken., 100A(11), 3059-3070.
https://doi.org/10.1002/jbm.a.34225

Veljović Đ, Čolić M, Kojić V, Bogdanović G, Kojić Z, Banjac A, Palcevskis E, Petrović R, Janaćković Đ. The effect of grain size on the biocompatibility, cell-materials interface, and mechanical properties of microwave-sintered bioceramics. in Journal of Biomedical Materials Research Part A. 2012;100A(11):3059-3070.
doi:10.1002/jbm.a.34225 .

Veljović, Đorđe, Čolić, Miodrag, Kojić, Vesna, Bogdanović, Gordana, Kojić, Zvezdana, Banjac, Andrijana, Palcevskis, Eriks, Petrović, Rada, Janaćković, Đorđe, "The effect of grain size on the biocompatibility, cell-materials interface, and mechanical properties of microwave-sintered bioceramics" in Journal of Biomedical Materials Research Part A, 100A, no. 11 (2012):3059-3070,
https://doi.org/10.1002/jbm.a.34225 . .