合成物质

The influence factors such as molar ratio of hexyl alcohol to propionic acid,amount of catalyst, and reaction time on the yield of hexyl propionate were discussed.

以钨硅酸为催化剂，通过丙酸和己醇反应合成了丙酸己酯，探讨了醇酸物质的量比、催化剂用量及反应时间对酯化率的影响。

By using sodium bisulfate as the catalyst, hexyl hexanoate was synthesized.

采用硫酸氢钠为催化剂合成了己酸己酯，考察了催化剂用量、醇酸物质的量比、反应时间、带水剂用量及催化剂重复使用次数等因素对收率的影响。

Introductionratherosclerosis and hypertensin are associated with adherence of blood cell, thrombosis, vasoconstriction and proliferation of vascular smooth muscle.

血管内皮细胞能合成合释放多种血管活性物质，对维持血管的舒缩，抑制血小板的聚集及平滑肌的增殖均具有重要意义。

Lack of information on the description of its route of synthesis, absence or insufficience of its impurity profile (related substances, reagents, solvents, catalysts), and the carry-over of its impurities to the final substance (58.5% of dossiers).

缺少如下资料：起始原料合成路线的叙述，起始原料的杂质概况（有关物质，试剂，溶剂，催化剂）没有或不充分，起始物料中杂质携带至原料药中的情况（申请文件的58.5%）。

The approaches in organic chemistry reveal the essence of bonding of atoms within the oranic chemicals which constituent the matters in the world, the law of organic molecules interconversion, and designs and synthesizes organic molecules with special structures. Meanwhile, it provides theory, technology and materials for related subjects such as material science, life science and environmental science.

有机化学学科的发展，揭示了构成物质世界的有机化合物分子中各原子间键合的本质以及有机分子转化的规律并设计、合成了具有特定结构的有机分子；它又为材料科学、生命科学、环境科学等相关学科的发展提供了理论、技术和材料。

In addition,the results of the experiment showed licorice flavonoid could have good interdiction performance on the synthesis of nitrosodimethylamineand that the maximum inter.

研究了甘草黄酮类物质对亚硝胺合成的阻断作用，结果表明活性提取物对亚硝胺的最大阻断率为80.8

The present process combines alloying with a solid-state reaction, which is controlled by interdiffusion of elements.

在本试验条件下，TiC以形核-逐渐长大的方式生成，没有发生自维持反应，这是由于Al及部分Ti起到了稀释剂的作用，使绝热合成温度大大降低，而且Al分隔了反应组元，影响了物质传输与热量传递。

Hepatic stimulating substance was first isolated from weanling rat liver in 1975 and found to stimulate hepatic DNA synthesis both in vitro and in vivo.

摘要翻译：肝刺激物质首次于1975年从断奶的大鼠肝脏里分离出来，它能促进体内和体外DNA的合成。

It is exhibited by ruby, kunzite, yellow-green synthetic spinel, some diamonds and opals, and many other substances.

它展示了红宝石、kunzite、黄绿色合成尖晶石，一些钻石和蛋白石等许多物质。

Artemisinin is an endoperoxide of the sesquiterpene lactone. The structure of this compound is too complex to be synthesized effectively.

青蒿素是倍半萜烯的一种内过氧化物，这种物质由于其极复杂的结构，因此很难被有效合成。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失