Effect of theaflavin derivatives on influenza A virus Effect of phytohemagglutinin (PHA ) from Yunnan white kidney bean on development of mouse embryos An Experimental Study on Effects of Lingzhi Spore on the Immune Function and 60Co Radioresistance in Mice Vector construction and over-expression of an avian influenza virus hemagglutinin (HA) in transgenic Lotus corniculatus