目的应用牛胸腺dna和染毒丙烯腈(AN)小鼠精细胞研究an对DNA的交联作用，研究AN毒作用的分子机制。
Objective to study the cross-link effect on DNA and the toxic mechanism of acrylonitrile (an) using calf thymus DNA and spermatids of an exposed mice.
已经证实，PGES在小鼠胚胎着床和蜕膜化过程，以及牛的排卵过程中起很重要的作用。
PGES has been proved to be important for mouse implantation and decidualization, and for ovulation in bovine.
取昆明小鼠90只，随机分为3组，牛松质骨粒组、天然珊瑚组和磷酸三钙组，每组30只。
Totally 90 Kunming mice were divided randomly into bovine cancellous particles group natural coral group and TCP group with 30 in each group.
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