查询词典 Veratrum

The general method and microwave radiation Veratrum aldehyde synthesis comparison Abstract: Objective To investigate the synthesis methods Veratrum aldehyde and to study the synthesis of microwave radiation of the advantages and disadvantages of this new approach, to provide guidance for the production of meaning.

化学合成毕业设计翻译求解急！！用普通方法和微波辐射法合成藜芦醛的比较摘要：目的考察合成藜芦醛的方法，并研究微波辐射合成这种新方法的优缺点，为生产提供指导意义。

Objective To investigate the synthesis methods Veratrum aldehyde and to study the synthesis of microwave radiation of the advantages and disadvantages of this new approach, to provide guidance for the production of meaning.

目的 考察合成藜芦醛的方法，并研究微波辐射合成这种新方法的优缺点，为生产提供指导意义。

This dissertation describes the chemical and pharmacology study of Corydalis saxicola and the chemical investigation of Veratrum.

本文研究了罂粟科植物岩黄连中的抗肝炎活性成分及百合科藜芦属植物藜芦Veratrum.nigrum Linn。

Resveratrol (3,5,4'- trihydroxystilbene) was first isolated from the roots of white hellebore Veratrum grandiflorum O.

白藜芦醇( 3，5，4'三羟基二苯乙烯)最早是于1940年从白藜芦的根茎中分离所得。

Any of various plants of the genus Veratrum having large leaves and green flowers.

各种藜芦属植物的任何一种都具有宽大的叶子和绿色的花朵。

Any of various plants of the genus Veratrum, especially V. viride of North America, having large leaves and greenish flowers and yielding a toxic alkaloid used medicinally.

藜芦属植物各种藜芦属植物的任何一种，尤指产于北美的绿藜芦，具有宽大的叶子和绿色的花朵，产生一种有毒的生物碱，可入药

A preliminary study was conducted on the reproductive features of d ifferent populations of Veratrum nigrum along an altitudinal gradient in Don gling Mountains, Beijing.

在北京东灵山地区，沿一定海拔梯度，对藜芦这一雄花两性花同株的多年生草本植物的繁殖特征进行了初步研究。

Forty-two compounds were isolated from Corydalis saxicola and fifty-two from Veratrum.

本文从两种植物中共分离鉴定了94个化合物，其中10个为新化合物。

Veratrum aldehyde synthesis of many drugs intermediates, methyl aldehyde method for raw materials in Champlain, after dimethyl sulfate methylation available to 20% sodium hydroxide as the solvent, 10-11 in the PH value of the under the conditions of synthesis; microwave irradiation is the use of microwave radiation heating to replace the traditional approach to synthesis of a product of methylation reactions, this method does not require solvents, and less by-products, but still need to use 15% sodium hydroxide to adjust pH.

藜芦醛是许多药物合成的中间体，甲基化法以香兰醛为原料，经过硫酸二甲酯甲基化可得，以20%氢氧化钠为溶剂，在PH值为10-11的条件下合成；微波辐射法是利用微波辐射代替传统加热方式进行甲基化反应合成产物，这种方法不需要溶剂，并且副产物少，但仍需要用15%氢氧化钠来调节酸碱度。

The results of the rule of law with ordinary methylation by formaldehyde Veratryl three groups the average weight of 2.5609g, the average yield was 91.31%, the melting point of the three groups were 42.4 ~ 44.8 ℃, 41.5 ~ 45.2 ℃, 41.7 ~ 44.3 ℃, from the results of we can see that the three groups of the melt from the melting point greater than that which the product of the by-product of the detection of the melting point have a certain impact; and the legal system with microwave radiation by an average of Veratrum aldehyde quality 1.4016g, the average yield was 93.23 %, melting point of the three groups were 41.8 ~ 43.2 ℃, 41.3 ~ 42.6 ℃, 41.6 ~ 43.5 ℃, melting away from the three groups as compared with ordinary methods of measuring the melt-out from the small.

结果 用普通甲基化法制出来的三组藜芦醛平均质量为2.5609g，平均产率为91.31％，三组的熔点分别为42.4～44.8℃，41.5～45.2℃，41.7～44.3℃，从结果可以看出，三组熔点的熔距都比较大，证明产物当中的副产物对熔点的检测有一定的影响；而用微波辐射法制出来的藜芦醛平均质量为1.4016g，平均产率为93.23％，三组熔点分别为41.8～43.2℃，41.3～42.6℃，41.6～43.5℃，三组熔距较普通方法测出来的熔距小。

The changes of the HAF after liver injury may be related to the volume of blood loss, the intraabdominal pressure and the pneumoperitoneum duration.

肝撞击伤伴失血后肝动脉血流量的变化与失血量、气腹压力以及气腹持续时间等有密切联系。

Reneging on our commitments to the world's poor cannot be an austerity measure, she said.

放弃我们给世界上的穷国的承诺不能成为一种紧缩措施。