Abstract: The effects of some tea infusions,catechins,and organic acids on the activities of three enzymes and two microorganisms were investigated.The results showed that activities of proteinase and α-amylase extracted from pancreas were improved by tea infusions,catechins,and organic acids.Yunnan compressed tea improved the activities of α-amylase and proteinase by 17.2 and 15.6times respectively.All the treatments mentioned inhibited the activities of lipase in different degrees.Yuannan compressed tea,fermented green tea solution and green tea infusion appeared to have high abilities to promote the growths of Lactobacillus bulgaricus and Bifidobacteriam.The dried weight of Lactobacillus bulgaricus cultured in either Yuannan compressed tea or fermented green tea solution was 40.0% higher than that cultured in physiological saline,and also higher than that cultured in green tea infusions.However,Fermented green tea solution showed the best effect on stimulating Bifidobacteriam growth among the three treatments.It increased 62.5% weight higher than that cultured in physiological saline.

Key words: Pressed tea , Catechins , Some organic acids , Pancreatic enzyme , Microorganisms , Promoted action