结论：表达质粒的拷贝数、宿主菌培养条件、细胞破碎方式等均能影响酶的表达量。

Conclusion: The culture conditions and procedure of cell disrepution can influence the expression of GDH.

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提出了按等强齿数确定闭式齿轮传动设计准则的新方法。

Study of determining method of number of gear teeth in shifting system of machine tools;

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提出了按等强齿数确定闭式齿轮传动设计准则的新方法。

Study of determining method of number of gear teeth in shifting system of machine tools;

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