TY  - CONF
AU  - Paunović, Anđela
AU  - Pavlović, Stefan
AU  - Marinković, Dalibor
AU  - Mojović, Ljiljana
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4200
AB  - The green CaO/Zeolite catalyst for methanolysis of fatty oils was synthesized entirely from the waste materials. CaO derived from chicken eggshell was loaded onto fly ashbased zeolite catalyst carrier by the wet impregnation method using an alcohol solution. The effect of thermal activation at different temperatures ranging from 450 to 600 °C on catalytic activity was studied. The precursor and catalyst samples were characterized by XRD, FTIR, SEM, and Hg-porosimetry techniques. The catalytic tests were performed in a stirred batch reactor at the following reaction conditions: 60 °C - reaction temperature, 12:1 - methanol/oil molar ratio, and 4 wt% - catalyst concentration. The obtained results showed that the synthesized CaO/Zeolite catalyst has preserved alumosilicate framework-cancrinite type [1], with uniformly distributed calcium oxide (CaO) on its surface (Fig. 1c). It is shown that the catalyst sample calcinated at 550 °C exhibited the highest FAME content of 96.46%, which was achieved in 2 h (Fig. 2). Increasing temperature of calcination above 550 °C led to the formation of inactive calcium alumosilicate forms causing a decrease in the FAME content.
PB  - Belgrade : Serbian Chemical Society
C3  - Book of abstracts - Seventh Conference of the Young Chemists of Serbia
T1  - Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity
EP  - 101
SP  - 101
UR  - https://hdl.handle.net/21.15107/rcub_technorep_4200
ER  - 

@conference{
author = "Paunović, Anđela and Pavlović, Stefan and Marinković, Dalibor and Mojović, Ljiljana",
year = "2019",
abstract = "The green CaO/Zeolite catalyst for methanolysis of fatty oils was synthesized entirely from the waste materials. CaO derived from chicken eggshell was loaded onto fly ashbased zeolite catalyst carrier by the wet impregnation method using an alcohol solution. The effect of thermal activation at different temperatures ranging from 450 to 600 °C on catalytic activity was studied. The precursor and catalyst samples were characterized by XRD, FTIR, SEM, and Hg-porosimetry techniques. The catalytic tests were performed in a stirred batch reactor at the following reaction conditions: 60 °C - reaction temperature, 12:1 - methanol/oil molar ratio, and 4 wt% - catalyst concentration. The obtained results showed that the synthesized CaO/Zeolite catalyst has preserved alumosilicate framework-cancrinite type [1], with uniformly distributed calcium oxide (CaO) on its surface (Fig. 1c). It is shown that the catalyst sample calcinated at 550 °C exhibited the highest FAME content of 96.46%, which was achieved in 2 h (Fig. 2). Increasing temperature of calcination above 550 °C led to the formation of inactive calcium alumosilicate forms causing a decrease in the FAME content.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Book of abstracts - Seventh Conference of the Young Chemists of Serbia",
title = "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity",
pages = "101-101",
url = "https://hdl.handle.net/21.15107/rcub_technorep_4200"
}

Paunović, A., Pavlović, S., Marinković, D.,& Mojović, L.. (2019). Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia
Belgrade : Serbian Chemical Society., 101-101.
https://hdl.handle.net/21.15107/rcub_technorep_4200

Paunović A, Pavlović S, Marinković D, Mojović L. Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity. in Book of abstracts - Seventh Conference of the Young Chemists of Serbia. 2019;:101-101.
https://hdl.handle.net/21.15107/rcub_technorep_4200 .

Paunović, Anđela, Pavlović, Stefan, Marinković, Dalibor, Mojović, Ljiljana, "Biodiesel synthesis over green catalyst: The effect of thermal treatment of CaO/Zeolite precursor on catalytic activity" in Book of abstracts - Seventh Conference of the Young Chemists of Serbia (2019):101-101,
https://hdl.handle.net/21.15107/rcub_technorep_4200 .

TY  - CONF
AU  - Paunović, Anđela
AU  - Knežević-Jugović, Zorica
AU  - Jovanović, Jelena
AU  - Pavlović, Neda
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/6256
AB  - Bioactive peptides carry antioxidative activity and have the potential to be used as additives
in food formulation. When incorporated, major instability of peptides is imposed within
heterogeneous products, as well as the loss of biological activity in the gastrointestinal
system before absorption into the bloodstream and manifestation of biological activity at the
target site in the body. A good solution as a controlled release system is liposomes – particles
made out of phospholipids, natural molecules and a building block of the cell membrane.
Therefore, the aim of this study was to prepare new systems for the encapsulation and
controlled release of soybean antioxidant peptides.
Liposome preparation was performed by forming a uniform thin film of phospholipon 90-G
and hydrating it with an aqueous solution of soy protein concentrate hydrolyzate prepared by
a two-step enzymatic process. The last step of liposome preparation was ultrasonic treatment.
The size distribution, surface charge, degree of encapsulation and stability of multilamellar
liposomes were characterized. A thin film method provided a satisfying percentage of
encapsulation of soybean antioxidant peptides (19%). The ultrasonic homogenizer proved to
be three times better than the ultrasonic bath while reducing the size of the particles. The
antioxidant activity was tested by neultralization of the ABTS • + radical cation method and
by Fe2+ ion chelation method. The test have shown that encapsulation of the peptide activity
was partially retained. In the simulated gastrointestinal system, diffusion experiments have
shown that liposomes slow down the release of antioxidant peptides.
The presented results represent important information for the specific application of
liposomes with encapsulated soybean peptides in functional food products.
PB  - Belgrade : Institute of Technical Sciences of SASA, 2019 (Belgrade : Gama digital centar)
C3  - Book of Abstracts / Eighteenth Young Researchers’ Conference Materials Science and Engineering
T1  - Design of the new particles for controlled release of bioactive peptides
SP  - 13
UR  - https://hdl.handle.net/21.15107/rcub_technorep_6256
ER  - 

@conference{
author = "Paunović, Anđela and Knežević-Jugović, Zorica and Jovanović, Jelena and Pavlović, Neda",
year = "2019",
abstract = "Bioactive peptides carry antioxidative activity and have the potential to be used as additives
in food formulation. When incorporated, major instability of peptides is imposed within
heterogeneous products, as well as the loss of biological activity in the gastrointestinal
system before absorption into the bloodstream and manifestation of biological activity at the
target site in the body. A good solution as a controlled release system is liposomes – particles
made out of phospholipids, natural molecules and a building block of the cell membrane.
Therefore, the aim of this study was to prepare new systems for the encapsulation and
controlled release of soybean antioxidant peptides.
Liposome preparation was performed by forming a uniform thin film of phospholipon 90-G
and hydrating it with an aqueous solution of soy protein concentrate hydrolyzate prepared by
a two-step enzymatic process. The last step of liposome preparation was ultrasonic treatment.
The size distribution, surface charge, degree of encapsulation and stability of multilamellar
liposomes were characterized. A thin film method provided a satisfying percentage of
encapsulation of soybean antioxidant peptides (19%). The ultrasonic homogenizer proved to
be three times better than the ultrasonic bath while reducing the size of the particles. The
antioxidant activity was tested by neultralization of the ABTS • + radical cation method and
by Fe2+ ion chelation method. The test have shown that encapsulation of the peptide activity
was partially retained. In the simulated gastrointestinal system, diffusion experiments have
shown that liposomes slow down the release of antioxidant peptides.
The presented results represent important information for the specific application of
liposomes with encapsulated soybean peptides in functional food products.",
publisher = "Belgrade : Institute of Technical Sciences of SASA, 2019 (Belgrade : Gama digital centar)",
journal = "Book of Abstracts / Eighteenth Young Researchers’ Conference Materials Science and Engineering",
title = "Design of the new particles for controlled release of bioactive peptides",
pages = "13",
url = "https://hdl.handle.net/21.15107/rcub_technorep_6256"
}

Paunović, A., Knežević-Jugović, Z., Jovanović, J.,& Pavlović, N.. (2019). Design of the new particles for controlled release of bioactive peptides. in Book of Abstracts / Eighteenth Young Researchers’ Conference Materials Science and Engineering
Belgrade : Institute of Technical Sciences of SASA, 2019 (Belgrade : Gama digital centar)., 13.
https://hdl.handle.net/21.15107/rcub_technorep_6256

Paunović A, Knežević-Jugović Z, Jovanović J, Pavlović N. Design of the new particles for controlled release of bioactive peptides. in Book of Abstracts / Eighteenth Young Researchers’ Conference Materials Science and Engineering. 2019;:13.
https://hdl.handle.net/21.15107/rcub_technorep_6256 .

Paunović, Anđela, Knežević-Jugović, Zorica, Jovanović, Jelena, Pavlović, Neda, "Design of the new particles for controlled release of bioactive peptides" in Book of Abstracts / Eighteenth Young Researchers’ Conference Materials Science and Engineering (2019):13,
https://hdl.handle.net/21.15107/rcub_technorep_6256 .