二酸

It is very important to optimize the fermentation technology of Actinobacillus succinogenes for the industrial bioconversion of succinic acid from crop straw.

该文对产丁二酸放线杆菌的发酵工艺优化，为工业规模的农作物秸秆生物转化制备丁二酸提供重要指导。

According to current domestic production situation and market demands, the scale of adipic acid production equipment is scheduled to 10 thousand tons per year.

建设规模及产品方案：根据我国己二酸的生产现状和市场需求，在国内建设己二酸生产装置，规模确定为1万吨/年为宜。

The results showed that the conversion of adipic acid in the batch step and the Continuous step were more than 68% and 98%, respectively, at the catalyst level of 5%.

结果表明，当DNW-I型催化剂用量为5%（以己二酸计，m/m，下同）时，己二酸间歇及连续醋化后转化率分别大于68%和98%。

It was generally synthesized with the methods described in literatures (9) and (10) in China, while in foreign countries, azelaic acid was mainly prepared with the methods described in literatures〔11〕and 〔12〕.

国内一般利用文献〔9，10〕的方法制备，而国外近年来主要以文献〔11，12〕的方法获得壬二酸，另外，还出现了以煤和工业废料为原料获取壬二酸的报道〔13〕。

The composition and solubility of the main impurities in crude azelaic acid ,which was the reaction product of ozonolysis of oleic acid,were analyzed in detail.

以油酸臭氧氧化法制备的纯度为88.37%的壬二酸粗品为原料，用固液萃取法分离提纯，得到了纯度为98.73%的壬二酸。

The influence of azelaic acid on melanin synthesis and tyrosinase activity of human melanocytes and murine B16 melanoma cells were studied.

结果 壬二酸作用于人表皮黑素细胞后，可见细胞树突明显减少；壬二酸作用于B16细胞后，细胞形态无明显改变。

On the condition of using fatty acids of rapeseed oil as raw material,85% acetic acid as solvent, pelargonic acid as recrystalization solvent, this paper prepared azelaic acid and brassylic acid by ozonolysis ,oxidation decomposition ,recrystallization etc.

以蓖麻油酸为原料、85%醋酸水溶液为溶剂，经臭氧化、氧化分解、沸水萃取等过程制备壬二酸的最佳反应条件为：m：m(85%醋酸)=1：4，臭氧化温度20-25℃；氧化分解温度90-95℃，催化剂醋酸锰/醋酸铜用量为原料蓖麻油酸质量的0.09%，氧化分解4h，壬二酸的收率为62.5%。

In 300 working days in a year, the project is able to process 6,000 tons of castor oil, output 3,000 tons of sebacylic acid (purity ≥ 99.5%) and 2,400 tons of caprylic acid (purity ≥ 85%).

拟新建20吨/日蓖麻油生产癸二酸生产线一条，年生产天数300天，处理蓖麻油6000吨，年产癸二酸3000吨（纯度≥99.5%），仲辛酸2400吨（纯度≥85%）。

The new surfactant was synthesized from the main starting materials such as lauric acid, p-cresol, chlorosulphonic acid and ethylene diamine, by 5 classic reactions which are acyl chlorination, esterification, Fries rearrangement, sulfonation and condensation, with total yield of 58%.

作者以十二酸、对甲酚、氯磺酸、乙二胺等为主要原料，共采取了酰氯化、酯化、Fries重排、磺化和缩合等5步经典的单元反应，合成了该表面活性剂，总收率为58％，并探讨了各步反应的条件对收率的影响。

Synthesis technology of cinnamyl methyl fumarate containing α,β-unsaturated carbonyl group and its antimicrobial activity was studied.

以α，β-不饱和羰基结构为母体设计合成反丁烯二酸桂醇甲酯，并对反丁烯二酸桂醇甲酯的抗菌活性进行了研究。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。