钼

In this paper,2,2-dimethylolbutyraldehyde was synthesized through the acetal reaction of formaldehyde and butyraldehyde,using phosphomolybstic acid as catalyst.

研究了磷钼酸对此缩醛反应的催化反应活性，以及催化剂的用量、反应物配比、反应时间等因素对反应产物收率的影响，确定了最佳催化条件。

Using self-made H3PW6Mo6O40 as catalyst,butyraldehyde glycol acetal was prepared by butyraldehyde and glycol.

用自制的磷钨钼杂多酸作催化剂，以丁醛和乙二醇反应合成了丁醛乙二醇缩醛。

The results shown that 12-molybdophosphoric acid did play inhibition in radical reactions, and the mechanism was conformed as electron capture theory.

通过使用电子顺磁共振仪对苯乙烯自由基聚合体系中自由基的跟踪测试，进一步证实12-钼磷酸确实能够在自由基聚合体系中起到阻聚剂的作用，而且更加明确地提出其阻聚机理：通过捕获体系中的电子达到抑制自由基聚合反应的发生。

Bismuth phosphomolybdate is a catalyst in the production of acrylonitrile, an important raw material for fibres and plastics.

磷钼酸铋是一种催化剂，用于丙烯的生产过程，丙烯是生产纤维和塑料的重要原料。

Three methods,the electrophoresis aggradation,brushed coating and water cooking method were presented to deposit MoS2 coatings in the material surfaces,and the deposited mechanisms were analyzed.

选用电泳沉积法、刷涂法和水煮法3种方法在材料表面制备了二硫化钼涂层，并探讨了3种方法形成涂层的机制。

The highest ee value of 71% was achieved by using chiral molybdenum 2'-pyridingyl alcoholate complex at 0 ℃. After addition of phase transfer catalyst Bu4NBr, the yield and ee value were remarkably increased.

其中手性吡啶醇二氧合钼在0℃下的对映选择性ee值达到71%；加入相转移催化剂四正丁基溴化铵，催化剂的活性和对映选择性有显著提高，其中手性吡啶醇二氧合钨在50℃下ee值由54％提高到78%。

Transfer 50 ml of this solution to 200-ml Erlenmeyer flask, or, if smaller aliquot is taken, dilute to about 50 ml with water. Add 10 ml 4 N H2SO4, 1 ml KI,1 drop ammonium molybdate solution, and 50 ml water. With continuous agitation, add excess of 0.00359 N Na2S2O3 (5 10 ml).

移取50毫升上述溶液于200毫升于锥形瓶中，如果取样量较少，用水稀释到50 毫升，加入10 ml 4 N H2SO4，1 ml KI， 1滴钼酸胺溶液和50毫升水，边搅拌边加入过量的0.00359 N Na2S2O3溶液(5 10 ml)。

ABSTRACT In the present paper experimental studies on thermodynamic behaviour of titanium and silicon oxides in a number of quaternary and pentanary molten slags have been made by means of H〓O/H〓 chemical equilibrium between copper melts and molten slags in alundum crucibles with the molybdenum plate as the liners.

本文采用H〓O/H〓定组成混合气体与钼衬坩埚中熔渣之间的化学平衡方法，实验研究了多个四元和五元熔渣中钛和硅氧化物的热力学行为。

Objective: To investigate the characteristics of mammography the diagnostic value in breast cancer.

目的：探讨乳腺癌的钼靶X线表现特征及乳腺钼靶摄影在乳腺癌诊断中的应用价值。

Is the first 3D polyoxomolybdates supramolecular architecture with nicotinic acid ligands.

化合物 8 是一个三维的超分子网络结构的钼氧簇，它的特点是烟酸首次作为配体与钼氧簇相连。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。