1·Speciation of Zn, Mn, Fe, Ca, Mg in Ligusticum wallichii Franch was analyzed by atomic absorptionspectrometry.
利用原子吸收分光光度法对中药川芎中锌、锰、铁、钙、镁五种元素的形态进行了研究。
2·Losses of ca and mg are accelerated by fertilizers which supply nitrate, sulphate and chloride.
在施用硝酸盐、硫酸盐和氯化物的情况下会加速钙和镁的损失。
3·It has been found that the Ca, Mg, la ion exchanged mordenites have both high activity and high selectivity toward dimethylamine with the yield of around 55%.
发现钙、镁、镧离子交换的丝光沸石，在表现出较高活性的同时，还对二甲胺具有55%左右的高选择性。
4·ChimgMing has engaged with metal manufacturing for more than three decades, main business is producing Die Casting parts of al, Zn, mg and precision metal parts.
我司从事金属零件的生产已三十多年，现主营铝、锌、镁压铸件和五金精密零配件。
5·Objective To study plasma and intra-erythrocyte Zn, Cu, Ca and Mg in infants with malnutrition.
目的为了解营养不良婴幼儿红细胞内锌、铜、钙、镁的变化及其意义。