id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ffhd-127	Li, Xican; Wang, Xiaozhen; Chen, Dongfeng; Chen, Shuzhi	Antioxidant Activity and Mechanism of Protocatechuic Acid in vitro	2011		.htm	text/html	615	19	24	Methods: In the study, the antioxidant activities of protocatechuic acid were measured in vitro using various antioxidant assays including 1,1-diphenyl-2-picryl-hydrazyl (DPPH•), 2,2’-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS+•), superoxide anion radicals (•O2-) and hydroxyl radical (•OH) scavenging activity, ferric ions (Fe3+) and cupric ions (Cu2+) reducing power, ferrous ions (Fe2+) and cupric ions (Cu2+) chelating activity, compared with the positive controls Trolox or BHT. It may exhibit antioxidant activity by both chelating metal transition ions as well as by scavenging free radicals via donating hydrogen atom (H•) or electron (e).	cache/ffhd-127.htm	txt/ffhd-127.txt