id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-1008	Jiang, Mingzhong; Chen, Ting; Zhao, Yan; Wu, Qi; Feng, Bo; Xiong, Shan; Wang, Baijuan	Effects of High Voltage Pulsed Electric Field on Antioxidant Activity of Tea Polyphenols for Yunnan Pu’er Tea 	2017	6	.pdf	application/pdf	3034	92	47	This paper deals with the extraction of tea polyphenols from tea samples by HPEF, and studies the effect of HPEF on the extraction rate and antioxidant activity of Pu’er tea polyphenols. We can see that through the analysis of the corresponding regression model: HPEF can improve the antioxidant activity of Pu’er tea polyphenols to a certain extent, and 1) When the voltage is 22kV, the tea polyphenols have the best scavenging effect on ·OH; 2) When the frequency is less than 100Hz and the voltage is less than 16kV, tea polyphenols has the greatest scavenging ability for O2·–; 3)The main factor affecting the scavenging ability on DPPH radical is frequency; when the frequency is about 140Hz, the scavenging ability of tea polyphenols on DPPH radical is the highest; 4)	cache/cet-1008.pdf	txt/cet-1008.txt