The present status of the research on heteropolytungstates containing XW 9O 33 9- (X=As Ⅲ,Sb Ⅲ,Bi Ⅲ) ion is introduced. The internal structures of and coordination environment of the transition metals and rare meta...The present status of the research on heteropolytungstates containing XW 9O 33 9- (X=As Ⅲ,Sb Ⅲ,Bi Ⅲ) ion is introduced. The internal structures of and coordination environment of the transition metals and rare metals within it are discussed.展开更多
文摘从食草动物的粪便中经筛选分离到1株能降解纤维素的放线菌,经初步鉴定为Streptomycesspp.。对其在以秸秆为惟一碳源的培养基上的产酶条件进行研究,结果表明,最适摇瓶发酵产酶条件为以硫酸铵为氮源,采用种龄72 h的菌液接种,在接种量10%、培养基装量1/10、培养温度30℃时,发酵60 h CMCase活力可达4.5 u/mL。
文摘The present status of the research on heteropolytungstates containing XW 9O 33 9- (X=As Ⅲ,Sb Ⅲ,Bi Ⅲ) ion is introduced. The internal structures of and coordination environment of the transition metals and rare metals within it are discussed.