TY  - JOUR
AU  - Pijovic, Milena
AU  - Manic, Nebojsa
AU  - Vasic-Anicijevic, Dragana
AU  - Krstic, Aleksandar
AU  - Mitric, Miodrag
AU  - Matić, Tamara
AU  - Jankovic, Bojan
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5015
AB  - Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 degrees C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2.g- 1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from pi-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.
T2  - Diamond and Related Materials
T1  - Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study
VL  - 121
DO  - 10.1016/j.diamond.2021.108768
ER  - 

@article{
author = "Pijovic, Milena and Manic, Nebojsa and Vasic-Anicijevic, Dragana and Krstic, Aleksandar and Mitric, Miodrag and Matić, Tamara and Jankovic, Bojan",
year = "2022",
abstract = "Pyrolytic tire (PT) chars were first produced from waste car tires (WCT) through carbonization process at 800 degrees C, for different retention times. Then, best PT-char sample by its physicochemical properties (WCT 800(1 h)) was further tested for its ability to adsorb Rhodamine B (RhB) dye from aqueous solutions. Structural characterization of synthesized material showed existence of graphene-based material, with average pore diameter of 22.8 nm and specific surface area of 55.8 m2.g- 1. Obtained carbon material meets specifications of commercial carbon black (CB). The yield of 33.6% of CB recovered has been achieved. Under the optimal conditions, 99.57% of RhB was removed. Adsorption of RhB obeys pseudo second-order model and Langmuir isotherm model. DFT (the density functional theory) was revealed that effective bonding of RhB onto WCT 800 originates from pi-electron interactions with aromatic moieties and chemical (or at least the electrostatic) interactions, between positive nitrogen and electron-rich surface groups.",
journal = "Diamond and Related Materials",
title = "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study",
volume = "121",
doi = "10.1016/j.diamond.2021.108768"
}

Pijovic, M., Manic, N., Vasic-Anicijevic, D., Krstic, A., Mitric, M., Matić, T.,& Jankovic, B.. (2022). Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials, 121.
https://doi.org/10.1016/j.diamond.2021.108768

Pijovic M, Manic N, Vasic-Anicijevic D, Krstic A, Mitric M, Matić T, Jankovic B. Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study. in Diamond and Related Materials. 2022;121.
doi:10.1016/j.diamond.2021.108768 .

Pijovic, Milena, Manic, Nebojsa, Vasic-Anicijevic, Dragana, Krstic, Aleksandar, Mitric, Miodrag, Matić, Tamara, Jankovic, Bojan, "Simple and effective one-step production of high-quality mesoporous pyrolytic char from waste tires: Rhodamine B adsorption kinetics and density functional theory (DFT) study" in Diamond and Related Materials, 121 (2022),
https://doi.org/10.1016/j.diamond.2021.108768 . .

TY  - JOUR
AU  - Pesic, Nikola
AU  - Dapčević, Aleksandra
AU  - Ivkovic, Branka
AU  - Kachrimanis, Kyriakos
AU  - Mitric, Miodrag
AU  - Ibric, Svetlana
AU  - Medarevic, Đorđe
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4805
AB  - In this study, four low molecular weight (LMW) excipients, tryptophan (TRY), phenylalanine (PHE), lysine (LYS) and saccharin (SAC) were evaluated as co-formers to generate co-amorphous systems (CAMS) by ball milling with carvedilol (CRV). Mixtures of CRV and LMW excipient in 1:0.5, 1:1 and 1:2 drug:excipient molar ratios were ball milled and analysed by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), Fourier transform (FT-IR) infrared spectroscopy and dissolution testing. CAMS were formed by milling of a mixture of CRV with TRY in 1:2 M ratio and SAC in 1:1 M ratio, while amorphization of only CRV was achieved in other mixtures with SAC. In other samples containing TRY and PHE, milling resulted in partial amorphization, while LYS was the least suitable excipient for the amorphization of CRV. Unexpectedly, the highest supersaturation of CRV was achieved from samples containing CRV and LYS in 1:1 and 1:2 M ratios, despite the absence of a significant reduction in CRV crystallinity upon milling of these samples. Increase of hydrophobic surface area caused by milling of samples with TRY and PHE and agglomeration during dissolution testing of samples containing SAC are likely causes of poor dissolution performance of mixtures containing fully or partially amorphous CRV.
T2  - International Journal of Pharmaceutics
T1  - Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol
VL  - 608
DO  - 10.1016/j.ijpharm.2021.121033
ER  - 

@article{
author = "Pesic, Nikola and Dapčević, Aleksandra and Ivkovic, Branka and Kachrimanis, Kyriakos and Mitric, Miodrag and Ibric, Svetlana and Medarevic, Đorđe",
year = "2021",
abstract = "In this study, four low molecular weight (LMW) excipients, tryptophan (TRY), phenylalanine (PHE), lysine (LYS) and saccharin (SAC) were evaluated as co-formers to generate co-amorphous systems (CAMS) by ball milling with carvedilol (CRV). Mixtures of CRV and LMW excipient in 1:0.5, 1:1 and 1:2 drug:excipient molar ratios were ball milled and analysed by powder X-ray diffraction (PXRD), differential scanning calorimetry (DSC), Fourier transform (FT-IR) infrared spectroscopy and dissolution testing. CAMS were formed by milling of a mixture of CRV with TRY in 1:2 M ratio and SAC in 1:1 M ratio, while amorphization of only CRV was achieved in other mixtures with SAC. In other samples containing TRY and PHE, milling resulted in partial amorphization, while LYS was the least suitable excipient for the amorphization of CRV. Unexpectedly, the highest supersaturation of CRV was achieved from samples containing CRV and LYS in 1:1 and 1:2 M ratios, despite the absence of a significant reduction in CRV crystallinity upon milling of these samples. Increase of hydrophobic surface area caused by milling of samples with TRY and PHE and agglomeration during dissolution testing of samples containing SAC are likely causes of poor dissolution performance of mixtures containing fully or partially amorphous CRV.",
journal = "International Journal of Pharmaceutics",
title = "Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol",
volume = "608",
doi = "10.1016/j.ijpharm.2021.121033"
}

Pesic, N., Dapčević, A., Ivkovic, B., Kachrimanis, K., Mitric, M., Ibric, S.,& Medarevic, Đ.. (2021). Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol. in International Journal of Pharmaceutics, 608.
https://doi.org/10.1016/j.ijpharm.2021.121033

Pesic N, Dapčević A, Ivkovic B, Kachrimanis K, Mitric M, Ibric S, Medarevic Đ. Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol. in International Journal of Pharmaceutics. 2021;608.
doi:10.1016/j.ijpharm.2021.121033 .

Pesic, Nikola, Dapčević, Aleksandra, Ivkovic, Branka, Kachrimanis, Kyriakos, Mitric, Miodrag, Ibric, Svetlana, Medarevic, Đorđe, "Potential application of low molecular weight excipients for amorphization and dissolution enhancement of carvedilol" in International Journal of Pharmaceutics, 608 (2021),
https://doi.org/10.1016/j.ijpharm.2021.121033 . .