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- The problems on acidity control of complexometric titration were further studied,and the new method of calculation on the dimension of suitable acidity about the titration in metal ion were proposed. 对络合滴定中酸度控制等问题进行了再探讨,提出了混合金属离子滴定适宜酸度范围的新的计算方法。
- According to the procedure, 1,2-dichloroethane is used as solvent, Sodium carbonate is used as catalyst, 2-Indanone is prepared, adding dropwise of performic acid control the reaction. 采用以1,2-二氯乙烷为溶剂、碳酸钠为催化剂,滴加过氧甲酸控制反应速度的新工艺合成医药中间体2-茚满酮,较之传统工艺安全有效。
- The invention relates to a nucleic acid controlling the expression of a useful polypeptide, particularly in the posterior silk glands of Bombyx mori . 本发明涉及指导目的蛋白质在家蚕后产丝腺细胞内特异表达的核酸。
- He gave me a taste of his acid wit. 他让我尝到了他敏锐尖刻之机智的滋味。
- Acid irritates the stomach lining. 酸能刺激胃黏膜。
- Acid had pitted the surface of the silver. 酸把银器的表面腐蚀了。
- I am doing an experiment of neutralizing acid. 我在做一个中和酸的实验。
- Can Jones beat Smith? That's the acid test. 琼斯能击败史密斯吗？那是个严峻的考验。
- A salt or an ester of boric acid. 硼酸盐一种硼酸盐或硼酸酯
- She dropped acid in high school. 她高中时代服迷幻药。
- The metal is fretted with the acid. 金属被酸腐蚀。
- The chemical can behave as an acid. 这种化学制品能起酸的作用。
- The acid has eaten through the metal cover. 酸已把金属盖子蚀穿了。
- The worker's overalls were badly burned by acid. 这位工人的工作装被酸腐蚀得很厉害。
- An acid can react with a base to form a salt. 酸可以和碱起反应而生成盐。
- This substance must be treated with acid. 这材料得用酸来处理。
- Some freshwater fish such as pike can withstand levels of acidity. 一些诸如梭鱼等淡水鱼可以抵御相当程度的酸性。
- The acid burnt a hole in the carpet. 酸把地毯烧了个洞。
- Carbolic acid can be used to make antiseptic. 石炭酸可用来做防腐剂。
- The acid eats into metals quickly. 酸腐蚀金属很快。
