Pork Freshness Detecting Method Based on the Change of Germ Area 基于细菌菌斑变化的猪肉新鲜度检测方法研究
On the genesis of primordial germ cells ( pgcs) in aves: ⅰ. ultrastructural observations on the PGCs in the germinal crescent area of the chick embryo 鸟类原生殖细胞的研究Ⅰ.鸡胚生殖新月区原生殖细胞超微结构的观察
China is a largest country in plantation area, germ plasm of natural resources of seabuckthorn in the whole world, and its distribution area is about 2 million hm2 and more than 90% of the world's seabuckthorn resources. 我国是全球沙棘栽植面积最大、种质资源最丰富、人工林建设最具成效的沙棘大国,现有沙棘林面积近200万hm2,占世界沙棘林面积的90%以上。