The major compositions of amphibole in the granites, trace element composition and isotopic composition of granites were effective index to distinguish different metallogenic granitic bodies.
角闪石的化学成分及不同成矿岩体的微量元素和同位素特征是区分区内两类不同成矿岩体的有效判别标志。
From the chemical composition, trace element, inoculation and thermal exchange of metal mold casting, the principle of chill formation and the effective methods for preventing chill were studied.
文章从铸铁的化学成分、微量元素、孕育处理及金属型的热交换方面叙述了产生白口的原理及防白口的有效方法。
The results show that medium composition, trace element concentrations and fungi strains can affect the bioconcentrating action of edible fungi.
结果显示：培养基成分、微量元素浓度和食用菌菌株会影响食用菌的生物富集作用。
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