Unlike the widespread HIV-1 M strain, and the much rarer N and O strains, which jumped to people from chimpanzees, the newly described P strain originated in gorillas.
与传播广泛的HIV-1 M株、以及更罕见的从人类转移至黑猩猩的N和O株不同的是，这一新发现的P株源自大猩猩。
A mutant, TS-N-121 was obtained by mutation and plate screening from a parent strain Mycobacterium fortuitum MF2 , which could transform sterol into androstanedione as the main product.
从雄甾二酮的转化产生菌偶发分枝杆菌MF2出发，经紫外诱变结合平板筛选，获得一株主要转化生产睾酮的突变株T S-N-1 21。
This paper has studied the changes about tensile strain hardening exponent (n-value) in three kinds of st steels by testing n-values and found changing tendency of them.
进行三种ST钢的应变硬化指数n值试验，分析试验结果，研究n值在整个应变区间的变化趋势。
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