Nikolić, Vesna

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  • Nikolić, Vesna (1)
  • Nikolić, Vesna D. (1)
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The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid

Zdravković, Aleksandar; Nikolić, Ljubiša; Ilić-Stojanović, Snežana; Nikolić, Vesna; Najman, Stevo; Mitić, Žarko; Ćirić, Ana; Petrović, Sanja

(Springer Berlin Heidelberg, 2018)

TY  - JOUR
AU  - Zdravković, Aleksandar
AU  - Nikolić, Ljubiša
AU  - Ilić-Stojanović, Snežana
AU  - Nikolić, Vesna
AU  - Najman, Stevo
AU  - Mitić, Žarko
AU  - Ćirić, Ana
AU  - Petrović, Sanja
PY  - 2018
UR  - http://link.springer.com/10.1007/s00289-018-2295-0
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/3009
AB  - The temperature- and pH-sensitive poly(N-isopropylacrylamide-co-acrylic acid) hydrogels, poly(NIPAM-co-AA), were synthesized by radical polymerization. The characterizations of hydrogels based on N-isopropylacrylamide (NIPAM) and acrylic acid (AA) before and after adsorption of heavy metal ions was performed by Fourier transform infrared spectroscopy and scanning electron microscopy. Heavy metal ions (Cr, Mn, Pb) adsorbed onto poly(NIPAM-co-AA) hydrogels were identified using the energy-dispersive X-ray spectroscopy. The mechanism of the water transport within the matrix of synthesized poly(NIPAM-co-AA) hydrogels at pH 4.5 is Super Case II diffusion, and at pH 6.8 corresponds to the non-Fickian diffusion mechanism. The effect of pH, temperature, contact time, and the initial concentration of heavy metals on the adsorption process of Cr(VI), Mn(II), and Pb(II) ions from aqueous solutions onto poly(NIPAM-co-AA) hydrogels were investigated. The kinetic and equilibrium data were best fitted by the pseudo-second-order model and Langmuir adsorption isotherm. Thermodynamic results indicate that the removal process of heavy metal ions from aqueous solutions by poly(NIPAM-co-AA) hydrogels was spontaneous and exothermic in nature. Maximum adsorption capacities of poly(NIPAM-co-AA) hydrogels for heavy metal ions decrease in the following order: Pb(II) > Cr(VI) > Mn(II).
PB  - Springer Berlin Heidelberg
T2  - Polymer Bulletin
T1  - The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid
IS  - 10
VL  - 75
DO  - 10.1007/s00289-018-2295-0
SP  - 4797
EP  - 4821
ER  - 
@article{
author = "Zdravković, Aleksandar and Nikolić, Ljubiša and Ilić-Stojanović, Snežana and Nikolić, Vesna and Najman, Stevo and Mitić, Žarko and Ćirić, Ana and Petrović, Sanja",
year = "2018",
abstract = "The temperature- and pH-sensitive poly(N-isopropylacrylamide-co-acrylic acid) hydrogels, poly(NIPAM-co-AA), were synthesized by radical polymerization. The characterizations of hydrogels based on N-isopropylacrylamide (NIPAM) and acrylic acid (AA) before and after adsorption of heavy metal ions was performed by Fourier transform infrared spectroscopy and scanning electron microscopy. Heavy metal ions (Cr, Mn, Pb) adsorbed onto poly(NIPAM-co-AA) hydrogels were identified using the energy-dispersive X-ray spectroscopy. The mechanism of the water transport within the matrix of synthesized poly(NIPAM-co-AA) hydrogels at pH 4.5 is Super Case II diffusion, and at pH 6.8 corresponds to the non-Fickian diffusion mechanism. The effect of pH, temperature, contact time, and the initial concentration of heavy metals on the adsorption process of Cr(VI), Mn(II), and Pb(II) ions from aqueous solutions onto poly(NIPAM-co-AA) hydrogels were investigated. The kinetic and equilibrium data were best fitted by the pseudo-second-order model and Langmuir adsorption isotherm. Thermodynamic results indicate that the removal process of heavy metal ions from aqueous solutions by poly(NIPAM-co-AA) hydrogels was spontaneous and exothermic in nature. Maximum adsorption capacities of poly(NIPAM-co-AA) hydrogels for heavy metal ions decrease in the following order: Pb(II) > Cr(VI) > Mn(II).",
publisher = "Springer Berlin Heidelberg",
journal = "Polymer Bulletin",
title = "The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid",
number = "10",
volume = "75",
doi = "10.1007/s00289-018-2295-0",
pages = "4797-4821"
}
Zdravković, A., Nikolić, L., Ilić-Stojanović, S., Nikolić, V., Najman, S., Mitić, Ž., Ćirić, A.,& Petrović, S.. (2018). The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid. in Polymer Bulletin
Springer Berlin Heidelberg., 75(10), 4797-4821.
https://doi.org/10.1007/s00289-018-2295-0
Zdravković A, Nikolić L, Ilić-Stojanović S, Nikolić V, Najman S, Mitić Ž, Ćirić A, Petrović S. The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid. in Polymer Bulletin. 2018;75(10):4797-4821.
doi:10.1007/s00289-018-2295-0 .
Zdravković, Aleksandar, Nikolić, Ljubiša, Ilić-Stojanović, Snežana, Nikolić, Vesna, Najman, Stevo, Mitić, Žarko, Ćirić, Ana, Petrović, Sanja, "The removal of heavy metal ions from aqueous solutions by hydrogels based on N-isopropylacrylamide and acrylic acid" in Polymer Bulletin, 75, no. 10 (2018):4797-4821,
https://doi.org/10.1007/s00289-018-2295-0 . .
21
11
21

Antimikrobna aktivnost lozengi sa praškom belog luka

Kundaković, Tatjana D.; Ćirić, Ana; Soković, Marina; Milenković, Marina T.; Nikolić, Vesna D.; Nikolić, Goran S.

(2011)

TY  - JOUR
AU  - Kundaković, Tatjana D.
AU  - Ćirić, Ana
AU  - Soković, Marina
AU  - Milenković, Marina T.
AU  - Nikolić, Vesna D.
AU  - Nikolić, Goran S.
PY  - 2011
PY  - 2011
UR  - https://radar.ibiss.bg.ac.rs/handle/123456789/386
AB  - According to the tested antimicrobial activity of constituents and their chemical characteristics, a new formulation of oral antiseptic was made based on garlic bulb powder and its active principles with strong antimicrobial activity against a wide range of bacteria and fungi. The antimicrobial activity of garlic bulb powder, allicin and the lozenge with 15% of garlic powder was tested using broth microdilution method. The tested garlic powder, as well the lozenge, have shown very high antimicrobial activity with MIC 1.25-5.00 mg/ml, and 1.87-7.50 mg/ml, respectively. The major compound, allicin, was highly active at a very low concentration. The minimal inhibitory concentration of allicin was from 6.25-12.50 μg/ml for antibacterial activity and 0.4 μg/ml for antifungal activity. Those concentrations are comparable with concentrations of commercially available antibiotics and fungicides. The formulation of an antiseptic with herbal constituents, high antibacterial and antifungal activity and pleasant taste could be an alternative to classical pharmaceutical oral antiseptics.
AB  - Na osnovu ispitane antimikrobne aktivnosti komponenata i njihovih hemijskih karakteristika, napravljena je nova formulacija oralnog antiseptika koji kao aktivnu komponentu ima prašak belog luka čiji sastojci pokazuju veoma izraženu aktivnost protiv širokog spektra bakterija i gljive Candida albicans. Antimikrobna aktivnost praška belog luka, alicina i lozengi sa 15% praška belog luka je ispitivana bujon mikrodilucionom metodom. Testiran prašak belog luka, kao i lozenge imaju veoma jaku antimikrobnu aktivnost sa minimalnim inhibitornim koncentracijama (MIC) 1,25-5,00 mg/ml (prašak belog luka) i 1,87-7,50 mg/ml (lozenge). Glavna aktivna komponeta belog luka, alicin, pokazuje antimikrobnu aktivnost u veoma niskim koncentracijama. Minimalne inhibitorne koncentracije alicina se kreću od 6,25-12,5 μg/ml protiv bakterija i 0,4 μg/ml protiv gljivice Candida albicans. Ove koncentracije se mogu uporediti sa koncentracijama komercijalnih antibiotika i fungicida. Naši rezultati su u skladu sa prethodnim ispitivanjima alicina i različitih ekstrakta belog luka, i potvrđuju najvažniju ulogu alicina u antimikrobnoj aktivnosti. Veoma je važna visoka aktivnost ovako formulisanog oralnog preparata protiv gljivice C. albicans koja je čest uzročnik infekcija usne duplje. Formulisan proizvod sa antiseptičkim osobinama karakteriše stanje čvrstog rastvora gde su aktivne supstance molekularno-disperzno ugrađene u obliku dobro rastvornog polimernog matriksa (sorbitola) velike specifične površine. Dobra rastvorljivost polimernog matriksa i velika specifična površina omogućuju zadovoljavajuću brzinu otpuštanja aktivnih principa iz belog luka (alicin). Pored visoke antimikrobne aktivnosti, lozenge poseduju prijatan ukus i osvežavaju dah, pa se mogu koristiti kao prirodni antiseptik u prevenciji i terapiji infekcija sluzokože usta i ždrela. Formulacija antiseptika sa biljnim sastojcima i visokom antibakterijskom i antifungalnom aktivnošću može biti alternativa farmaceutskim oralnim antisepticima.
T2  - Hemijska industrija
T1  - Antimikrobna aktivnost lozengi sa praškom belog luka
T1  - Antimicrobial activity of lozenge with garlic bulb powder
IS  - 5
VL  - 65
SP  - 607
EP  - 610
UR  - https://hdl.handle.net/21.15107/rcub_ibiss_386
ER  - 
@article{
author = "Kundaković, Tatjana D. and Ćirić, Ana and Soković, Marina and Milenković, Marina T. and Nikolić, Vesna D. and Nikolić, Goran S.",
year = "2011, 2011",
abstract = "According to the tested antimicrobial activity of constituents and their chemical characteristics, a new formulation of oral antiseptic was made based on garlic bulb powder and its active principles with strong antimicrobial activity against a wide range of bacteria and fungi. The antimicrobial activity of garlic bulb powder, allicin and the lozenge with 15% of garlic powder was tested using broth microdilution method. The tested garlic powder, as well the lozenge, have shown very high antimicrobial activity with MIC 1.25-5.00 mg/ml, and 1.87-7.50 mg/ml, respectively. The major compound, allicin, was highly active at a very low concentration. The minimal inhibitory concentration of allicin was from 6.25-12.50 μg/ml for antibacterial activity and 0.4 μg/ml for antifungal activity. Those concentrations are comparable with concentrations of commercially available antibiotics and fungicides. The formulation of an antiseptic with herbal constituents, high antibacterial and antifungal activity and pleasant taste could be an alternative to classical pharmaceutical oral antiseptics., Na osnovu ispitane antimikrobne aktivnosti komponenata i njihovih hemijskih karakteristika, napravljena je nova formulacija oralnog antiseptika koji kao aktivnu komponentu ima prašak belog luka čiji sastojci pokazuju veoma izraženu aktivnost protiv širokog spektra bakterija i gljive Candida albicans. Antimikrobna aktivnost praška belog luka, alicina i lozengi sa 15% praška belog luka je ispitivana bujon mikrodilucionom metodom. Testiran prašak belog luka, kao i lozenge imaju veoma jaku antimikrobnu aktivnost sa minimalnim inhibitornim koncentracijama (MIC) 1,25-5,00 mg/ml (prašak belog luka) i 1,87-7,50 mg/ml (lozenge). Glavna aktivna komponeta belog luka, alicin, pokazuje antimikrobnu aktivnost u veoma niskim koncentracijama. Minimalne inhibitorne koncentracije alicina se kreću od 6,25-12,5 μg/ml protiv bakterija i 0,4 μg/ml protiv gljivice Candida albicans. Ove koncentracije se mogu uporediti sa koncentracijama komercijalnih antibiotika i fungicida. Naši rezultati su u skladu sa prethodnim ispitivanjima alicina i različitih ekstrakta belog luka, i potvrđuju najvažniju ulogu alicina u antimikrobnoj aktivnosti. Veoma je važna visoka aktivnost ovako formulisanog oralnog preparata protiv gljivice C. albicans koja je čest uzročnik infekcija usne duplje. Formulisan proizvod sa antiseptičkim osobinama karakteriše stanje čvrstog rastvora gde su aktivne supstance molekularno-disperzno ugrađene u obliku dobro rastvornog polimernog matriksa (sorbitola) velike specifične površine. Dobra rastvorljivost polimernog matriksa i velika specifična površina omogućuju zadovoljavajuću brzinu otpuštanja aktivnih principa iz belog luka (alicin). Pored visoke antimikrobne aktivnosti, lozenge poseduju prijatan ukus i osvežavaju dah, pa se mogu koristiti kao prirodni antiseptik u prevenciji i terapiji infekcija sluzokože usta i ždrela. Formulacija antiseptika sa biljnim sastojcima i visokom antibakterijskom i antifungalnom aktivnošću može biti alternativa farmaceutskim oralnim antisepticima.",
journal = "Hemijska industrija",
title = "Antimikrobna aktivnost lozengi sa praškom belog luka, Antimicrobial activity of lozenge with garlic bulb powder",
number = "5",
volume = "65",
pages = "607-610",
url = "https://hdl.handle.net/21.15107/rcub_ibiss_386"
}
Kundaković, T. D., Ćirić, A., Soković, M., Milenković, M. T., Nikolić, V. D.,& Nikolić, G. S.. (2011). Antimikrobna aktivnost lozengi sa praškom belog luka. in Hemijska industrija, 65(5), 607-610.
https://hdl.handle.net/21.15107/rcub_ibiss_386
Kundaković TD, Ćirić A, Soković M, Milenković MT, Nikolić VD, Nikolić GS. Antimikrobna aktivnost lozengi sa praškom belog luka. in Hemijska industrija. 2011;65(5):607-610.
https://hdl.handle.net/21.15107/rcub_ibiss_386 .
Kundaković, Tatjana D., Ćirić, Ana, Soković, Marina, Milenković, Marina T., Nikolić, Vesna D., Nikolić, Goran S., "Antimikrobna aktivnost lozengi sa praškom belog luka" in Hemijska industrija, 65, no. 5 (2011):607-610,
https://hdl.handle.net/21.15107/rcub_ibiss_386 .