EFFECTS OF IRRADIATION ON PHYSICOCHEMICAL AND SENSORY QUALITIES OF FERMENTED SHOOT TIP OF SWEET POTATO Inhibitory effect on activated renin-angiotensin system by astragaloside Ⅳ in rats with pressure-overload induced cardiac hypertrophy FUNCTIONALACTIVITIES OF FERMENTED LETTUCE STEM AND LEAF Screening of angiotensin converting enzyme inhibitors from Salvia miltiorrhizae