以脱乙酰壳聚糖为载体,戊二醛为交联剂制备固定化碱性蛋白酶.Alkaline protease has been immobilized on chitosan with glutaraldehyde as crosslinking agent.目的研究戊二醛的新合成方法.Aim To study the synthetic method for the glutaric dialdehyde.用途: 用于生产戊二醛及高分子材料, 涂料,...
' steel in this class is tough, ductile and easily machined. "这种钢强韧, 延展性好,而且容易加工.Shrinkage and dispersed shrinkage are the special waster of ductile iron.缩孔和缩松是球墨铸铁特有的废品现象.The metal is very hard and strong and less ...