[Laboratory studies of the antioxidant effect and free radical elimination of CoD tea].
Free radical elimination properties of anticarcinogenic CoD tea were studied in vitro in our laboratory. Therefore its antioxidant effect, lipid-hydroperoxide elimination property and reductive capacity were measured. The isoenzyme composition of CoD tea lipoxygenases was deduced from pH dependence of its lipoxygenase activity. It was found that the antioxidant effect and lipid-hydroperoxide elimination property of CoD tea were comparable with those of ascorbic acid and the reductive capacity of a cup of CoD tea and 11-13 mg ascorbic acid were the same. In spite of the heat sensibility of lipoxygenases, a strong lipoxygenase activity (1102 U/g) of CoD tea was detected in acidic medium (pH 4.5). It is supposed that these free radical elimination properties support anticarcinogenic effect of CoD tea.
Kosáry
Judit
J
Szent István Egyetem Elelmiszertudományi Kar, Alkalmazott Kémia Tanszék, Budapest, Villányi út 31.-1518.
Aubrecht
Erzsébet
E
Kopácsi
Szilárd
S
Myszlográd
Rita
R
D000975:Antioxidants / Q000494:pharmacology*; D005609:Free Radicals / Q000378:metabolism; D006863:Hydrogen-Ion Concentration; D008084:Lipoxygenase / Q000378:metabolism*; D013662:Tea / Q000737:chemistry* / Q000201:enzymology
D000975:Antioxidants; D005609:Free Radicals; D013662:Tea; D008084:Lipoxygenase