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Proučavanje efekta pH na strukturu, boju i spektralne karakteristike cijanidina i cijanidin 3-0-ß-glukopiranozida i ispitivanje njihove interakcije sa modelima lipidnih membrana

The investigation og pH effects on the structure, colour and spectral characteristics of cyanidin and cyanidin 3-0-ß-glucopyranoside and the examination of their interactions with lipid model membranes.

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2015
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Rakic_Violeta_P.pdf (1.829Mb)
Author
Rakić, Violeta P.
Mentor
Miljković, Milena N.
Committee members
Kostić, Danijela
Sokolović, Dušan
Poklar Ulrih, Nataša
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Abstract
The relationships between structure, spectral characteristics, and colour of the aglycone moiety of cyanidin and its 3-glucosidic substitution in cyanidin 3-O- β-glucopyranoside were studied as a function of pH, using a combination of techniques (UV-Vis spectrophotometry, colorimetry, and HPLC-ESI/MS). The absorption and fluorescence emission spectra of cyanidin and Cy3Glc at pH 5.5 in aqueous solution have been studied. The colour variation, colour intensity and stability at various pH values (2.0, 4.0, 7.0 and 9.0) of cyanidin and Cy3Glc were investigated during a period of 8 hours storage at 25 ± 0.1ºC, as well as, in the aqueous solution at pH 7.0 and under the conditions of the elevated temperature (55.0 ± 0.1ºC) which simulate the rapid food ageing. The interactions of cyanidin and Cy3Glc with model lipid membranes differing in surface charge and phase state were investigated using DSC and fluorescence emission polarization spectrometry.
Faculty:
University of Niš, Faculty of Science and Mathematics
Date:
16-03-2015
Keywords:
Cijanidini / anthocyanidins / antocijanidini / antocijanini / cijanidin 3-О-β-glukopiranozid / modeli membrana / UV-Vis apsorcioni spektri / HPLC-ESI/MS / fluorescentni emisijski spektri / diferencijalna skenirajuća kalorimetrija / fluorescentna emisiona polarizaciona spektrometrija / CIELAB parametri / boja. / anthocyanins / cyanidin / cyanidin 3-O-β- glucopyranoside / model membranes / UV-Vis absorption spectra / HPLC-ESI/MS / fluorescence emission spectra / differential scanning calorimetry / fluorescence emission polarization spectrometry / CIELAB parameters / colour
[ Google Scholar ]
URI
http://eteze.ni.ac.rs/application/showtheses?thesesId=1916
http://nardus.mpn.gov.rs/handle/123456789/3972
https://fedorani.ni.ac.rs/fedora/get/o:965/bdef:Content/download
http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70052&RID=1024887273

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