以下为句子列表:
英文: Abstract: The traditional catalyst used in acetal(ketal) synthetic reaction is strong inorganic acid.But there is some limits to its use because of its side reaction,strong erosion and liability to pollute the environment.Molybdophosphoric acid is used as
中文: 文摘:缩醛(酮)合成反应的传统催化剂为无机强酸,但由于副反应多、腐蚀性强和易污染环境等缺点,其使用受到限制.用磷钼酸为催化剂,通过醛(酮)与乙二醇直接反应得到了三种缩合产物.对影响反应的诸因素进行研究,结果表明,用磷钼酸作催化剂,用量小,活性高,产品收率较高,且重复使用性能较好.
更详细...
英文: Anodization of high purity Al foil in phosphoric acid solution at different pressures was experimentally studied to understand the formation mechanism of the nano-porous anodic alumina membranes.
中文: 摘要为探讨多孔铝阳极氧化膜的形成机理,研究了不同气压条件下铝在磷酸溶液中的阳极氧化过程,发现在真空下进行阳极氧化,氧气析出非常明显。
更详细...
英文: Biochemistry) A nitrogenous molecule, either a PYRIMIDINE or a PURINE, that combines with a pentose sugar and phosphoric acid to form a nucleotide, the fundamental unit of nucleic acids.
中文: 2碱基:一种含氮的分子,嘌呤碱或者是嘧啶碱,它们和戊糖还有磷酸一起构成核苷酸,核苷酸是核酸的基本结构单位。
更详细...
英文: Yibing base Liudai phosphoric acid amine production, marketing.
中文: 异丙基硫代磷酸胺的生产、销售。
更详细...
英文: The study on conjunctival matter from combustion tower of thermal-process phosphoric acid was put forward.
中文: 简述了工业制磷酸的生产方法和热法磷酸生产工艺的发展,分析了热法磷酸今后的发展方向,提出了热法磷酸燃烧塔结膜物的研究课题。
更详细...
|