Alcohol extract had a definite inhibition effect on HBsAg when the concentration was over 4 mg/ml (Styela plicata Lesueur and Styela canopus Savigny ) and 2 mg/ml(Symplegma oceania Tokioka ).

• 当皱瘤海鞘和冠瘤海鞘醇提取物的浓度大于4mg/ml、大洋纵列海鞘醇提取物的浓度大于2mg/ml时；3种海鞘对HBsAg具有一定程度的抑制作用(P<0.；05);