To improve the toughness of silk fibroin( SF) films,poly( ethylene glycol-glycerin)( PEGG) was synthesized with ethylene glycol and epichlorohydrin. The SF / PE
The divisions of the typical army maintenance organization’s tasks in wartime are discussed.Two distribution models of armored equipment maintenance objects ar
A hand-made biodegradable intravascular stent with zig- zag structure has been developed, which made from polylactic acid ( PLA ) braided thread and poly-eaprolac