查询词典 glycerol

Epichlorohydrin was synthesized from alkali and glycerol dichlorohydrin which was synthesized from glycerol and industrial hydrochloric acid in the presence of catalyst and additive.

摘 要：介绍了环氧氯丙烷合成新工艺：在催化剂和添加剂存在下，甘油与工业盐酸反应制得二氯丙醇，然后二氯丙醇与碱反应制得环氧氯丙烷产品。

In this research, we used Trifluoroacetic anhydride as a derivatizing agent to esterify the trace glycerol in biodiesel, followed by the determination of trace glycerol using microwave assisted headspace SPME extraction technique combined with GC-ECD.

本研究利用三氟醋酸酐与生质柴油中的微量甘油进行酯化反应，反应后的衍生物以本实验室开发的微波辅助顶空固相微萃取装置采样，并以气相层析仪搭配电子捕捉侦测器作分析。

The products prepared by esterification of glycerol and lauric acid followed by molecular distillation have lauric acid, glycerol and other impurities.

月桂酸单甘油酯是用途广泛的食品添加剂，在其制备过程中经分子蒸馏得到的制备品中会有月桂酸、甘油等杂质。

Then this model was used to detect the glycerol monolaurate, lauric acid and glycerol of samples in the validation set according to their spectra.

结果表明，应用光谱分析方法能够较好检测月桂酸单甘油酯、月桂酸和甘油含量。

Glycerol as a by-product is yielded at about 10% of biodiesel during the process of biodiesel production .How to convert glycerol has become a common problem which has to be resolved if considering large amount of biodiesel production. 1,3-propanediol is a valuable chemical material and especially it could be copolymerizes with terephthalic acid to form polytrimethylene terephthalate, which has aroused people's interesting.

在生物柴油的生产过程中，最高可得到约10%的副产物甘油，副产物甘油的去向将成为生物柴油大规模产业化发展所面临的严峻问题。1，3-丙二醇是一种重要的化工原料，作为合成新型聚酯PTT的原料，1，3-丙二醇已引起人们的广泛关注。

However, the conversion rate of glycerol produced from the first stage using cornstarch to 1,3-propanediol from the second stage was only 26.5 % in 31h and the final concentration of 1,3-propanediol was 13.4 g/L. The productivity of 0.43 g/ of the second stage was much lower than that of a two-stage-fermentation from glucose （1.65g/ L） or of single fermentation from saponified glycerol, which is

多年来，研究人员在甘油生物歧化过程的代谢途径、动力学特征等方面已进行了较为深入的研究，甘油作为唯一碳源的最大理论摩尔转化率为72％，辅助底物的使用可以将甘油转化率提高至100％，发酵液中1，3一PD的最终浓度可以达到65～70 g／L3 。。。。。。

Under the optimum concentration of 1.5% glycerol in fermentation medium and feeding of 1% glycerol as precursor after 60 h of incubation, the titer of 2,668 μg/ml was obtained in shake flask culture, an increase of 7.4 times compared with the original strain.

以XC-5-48菌株为试验菌株，当培养基中甘油初始浓度为1.5%，并且在发酵60h时补加1.0%的甘油，摇瓶发酵的效价可达2668μg/ml，较出发菌株(318μg/ml)提高了7.4倍。

In 3 WEEK group, the allografts were stored in glycerol for 3 weeks. In 5 WEEK group, the allografts were stored in glycerol for 5 weeks..

实验组：48只，根据保存时间的不同分为3周组、5周组、7周组和9周组，每组12只。

Methods The purified general bacteria in broth culture for46hourswerepreserved in glycerol-physiological saline,the purified streptococcus and Neisseria scraped from the agar culture were preserved in fresh sheep-blood which was added suitable glycerol-physiological saline,the purified fungi were cultivated in half-solid culture;-20℃general bacteria and fungi,-80℃streptococcus and Neisseria.

将普通细菌的菌种纯化后接种于普通肉汤管，4～6h增菌后，加入适量甘油-生理盐水保存液，-20℃冰箱保存；链球菌属和奈瑟氏菌属的菌株纯化后，用接种环取菌置于新鲜脱纤维绵羊血中，加入适量保存液，-80℃低温冰箱保存；真菌菌种纯化后接种于带硅胶塞的半固体培养基，25℃培养24h后，-20℃冰箱保存。

The mechanical analysis showed that the effect of the DMSO was better than glycerol and glycerol/water.

动态力学和拉伸力学性能测试结果表明，经过DMSO的增塑，有效降低了淀粉的玻璃化转变温度，改善了材料的韧性，增塑效率要好于甘油及甘油／水复合增塑体系。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。