Results showed that Mn contents and the ratio of copper to zinc in tealeaf were respectively positive correlation with its growth soil.
结果表明，茶叶中锰含量、铜锌比与土壤中对应的锰含量、铜锌比存在着一定的相关性。
The carbon-nitrogen mass ratio (mC/mN) has a significant influence on fermentative hydrogen production capacity of strain RF-9, cell growth and fermentative H2-producing ability would be impro.
利用间歇实验对不同碳源、氮源及碳氮质量比值对产氢细菌RF-9的发酵产氢行为影响进行了探讨。
In producing Mn Si alloys with hot furnace, feeding ratio of s? Mn is regulated, and slag amount and pH value are controled.
介绍了电炉生产锰硅合金时，合金中硫含量随所用原料硫含量变化的情况。
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