Naslov
Determination of Radical Scavenging Potential of Red Wines with Electron Spin Resonance

Autori
Linić, Ida ; Valić, Srećko

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of Abstracts / Kovarik, Zrinka ; Varljen, Jadranka - Opatija : Hrvatsko Društvo za Biotehnologiju, 2010, 121-121

Skup
10th Congress of the Croatian Society of Biochemistry and Molecular Biology

Mjesto i datum
Opatija, Hrvatska, 15.09.2010. - 18.09.2010

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
Antioxidant activity; red wine; ESR

Sažetak
Free radicals are involved in the etiology of many neurodegenerative diseases. Reduced activity of the radicals thus has positive effects on human health. In this work antioxidant properties of red wines were investigated using electron spin resonance, a method that can accurately detect free radicals. Galvinoxyl radical was applied for the first time in such investigation. Ethanol solution of radical was doped with five kinds of red wines from different geographic areas. The signal intensity was monitored as the function of time after an addition of wine to the radical solution. Galvinoxyl was proved to be suitable as a radical for such research. It was also shown that electron spin resonance is very sensitive and reliable method. The strongest antioxidant activity between the examined types of wines showed Plavac and Merlot Veneto, while Laguna Merlot, Cabernet Sauvignon and Merlot-Vranac showed lower activity. Differences in the activity of these wines were attributed to different concentrations of polyphenols as a basic antioxidant component of red wine. The lowest activity of Vranac-Merlot wine was further associated with possible lower concentrations of copper and iron that are known to catalyze redox reactions in polyphenolic compounds of red wines.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA