Pollen productivity is a critical parameter in the interpretation of pollen-vegetation relationships,and in the quantita......

目的 研究精子膜特异性蛋白Izumo基因mRNA在内蒙古白绒山羊睾丸和附睾组织中的表达.方法 采用逆转录-聚合酶链反应(reverse transc......

In China and East Asia,the long-term continuous observational data at daily resolution are insufficient,and thus there i......

The effects of exogenous gibberellic acid(GA_3)and abscisic acid(ABA) on the total respiratory rate, percentages of tota......

Through petroleum exploration of 20 years, a new petroleum production area has been constructed in Hailar Basin. Their ......

在标本鉴定和文献汇总的基础上,对东北亚地区(包括朝鲜半岛、日本、俄罗斯远东地区、中国东北)的蜉蝣区系做了统计分析.结果显示,......

The spatial trends of dustfall of different sizes over northern China during April and May 2001,and March 2002,and their......

在印度东北部白垩纪-第三纪沉积中发现了各种类型单沟无隔壁的Xylariaceae化石孢子,例如:Hypoxylonites,Spirotremesporites.Hypox......

There is plenty of forests in Northeast China which contributes a lot to the conservation of water and land resources, p......