目的制备止血模, 研究壳聚糖 、 明胶、PEG400间的用量比及己二醛溶液的使用对止血膜机械性能的影响.Objective To prepare arresting bleeding film, study the dosage proportion of chitosan, gelatin and PEG 400....
幼虫变为蝶蛹,再变成蝴蝶.A larva metamorphoses into a chrysalis and then into a butterfly.蛹期—黑燕尾蝶冬天时变身蝶蛹,气候回暖时破茧而出,变成蝴蝶.Pupa – Black swallowtails spend winter as chrysalids, emerging as butterflies when warm weather returns....
The hydrogenation of diene compound and carbonyl group with yeasts was studied.对几种酵母细胞催化双烯和羰基的加氢反应作了一些初步研究.Food which is kept too long decays because it is attacked by yeasts, molds and bacteria.保存得太久的食品会变坏,是因为受到酵母菌, 霉菌和...