The effects of nitrogen on the properties of low carbon high chromium cast iron were studied by mechanical property and wear resistance test, and metallograph analysis using OM and ESEM.

通过力学性能和耐磨性能测试、金相组织观察和ESEM形貌分析，研究了氮含量对低碳高铬铸铁性能的影响。

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This test is based on the culture medium of sodium acetate, add to a given amount of carbon source, nitrogen source and microelement as to improve the acid-producing ability of...

本实验以乙酸钠培养基为基础添加一定量的碳源、氮源及其微量元素，提高己酸菌的产酸能力。

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Method: Selecting the optimum carbon sources, nitrogen sources and inorganic salt to get the optimum liquid medium recipe by the orthogonal test in three factors and four levers;

方法：采用深层培养方法，筛选出较优的碳源、氮源、无机盐，设计三因素四水平的正交试验，筛选大杯伞的最适培养基；

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