查询词典 acid group

Each group was 10 Lycium barbarum seedlings.The contents of soluble sugar,soluble protein and malondialdehyde were determined by anthrone method,Foiln-hydroxybenzene method,thiobarbituric acid method respectively.

分别采用蒽酮法、Folin-酚法、硫代巴比妥酸法测定可溶性糖、可溶性蛋白质和丙二醛MDA的含量，用电导仪测定幼苗的电解质渗透率。

In the first 6 months of life, the formula-fed group was randomly assigned to formula with or without supplementation with DHA or arachidonic acid.

在出生后的6个月内，在配方奶喂养组的配方奶中随机添加和不添加DHA或花生四烯酸。

Ne laser, and the other 36 patients in the control group treated with VE, VC, and external application of 20% azelaic acid cream.

90例黄褐斑患者随机分为两组：治疗组54例，采用自拟补肾疏肝化瘀方、川芎嗪配合氦氖激光治疗。

The value of current density and the apparent active energy of electroreduction of substituted nitrobenzene depend on the electronic effect of substituted group and space resistance. o,m,p-chloronitrobenzene will be electroreduced to azoxy compounds by taking three electrons, o,m-nitrotoulene and o,m-nitrobenzoic acid will be reduced to phenol compounds by taking four electrons, and p-nitrotoulene will be reduced to the aniline by taking six electrons. According to these results, the electroreduction mechanism of the substituted aryl nitro-compounds was studied in detail.

在电还原过程中，还原峰电流和表观活化能的大小均与取代基的电子效应和空间位阻相关，同时取代硝基氯苯得3个电子将还原生成氧化偶氮苯类化合物：邻、间硝基甲苯、硝基苯甲酸得4个电子将还原生成酚类化合物；对硝基甲苯得6个电子将还原生成胺类化合物，在此基础上，探讨了各芳族硝基化合物的电还原机理。

Any of a group of barbituric acid derivatives that act as central nervous system ''.

巴比妥类药物任何一种巴比妥酸的衍生物，作为中枢神经系统抑制剂，用来镇静或催眠

Any of a group of barbituric acid derivatives that act as central nervous system depressants and are used as ''.

巴比妥类药物任何一种巴比妥酸的衍生物，作为中枢神经系统抑制剂，用来镇静或催眠

Any of a group of barbituric acid derivatives that act as central nervous system depressants and are used as sedatives or hypnotics.

巴比妥类药物任何一种巴比妥酸的衍生物，作为中枢神经系统抑制剂，用来镇静或催眠

Any of a group of barbituric ''.'acid'.''''.'derivatives'.

巴比妥类药物任何一种巴比妥''。

In this thesis, investigations focused on heteropoly acids-catalyzed C-C and C-N bond formation reactions and the synthesis of xanthenediones and acridinediones under thermal conditions are described.1.12-Phosphotungstic acid has been used as an efficient,eco-friendly,and air- and moisture-stable catalyst to promote the direct dehydrative substitution of the hydroxy group of benzylic and allylic alcohols with variousβ-dicarbonyl compounds.

本篇论文主要描述了杂多酸催化下的C-C和C-N键的生成，以及无溶剂直接加热下合成十氢氧杂蒽二酮和9-芳基十氢吖啶二酮。主要内容如下：1。在磷钨酸催化下，1，3-二羰基化合物与醇能够顺利偶合，脱除一分子的水，生成烷基化的1，3-二羰基化合物。反应在甲苯中进行时，二芳基甲醇能与各类1，3-二羰基化合物反应，成率很高；但对于1-苯乙醇，只能得到很低的产率。

Starting from 3, 5-dihydroxybenzoic acid, a total of 16 kinds of salicylicaldehyde derivatives have been synthesized by the esterification, substitution, reduction, formylation, condensation, brominate, functional group protection and deprotection reactions, of which 11 have not been reported yet. Enatiomerically pure 2-amino-2'-hydroxy-1, 1'-binaphthyl has been easily obtained from its racemic mixture by the eantioselective formation of inclusion crystals with N-benzylcinchoninium chloride.

树枝状大分子希夫碱三齿手性配体的设计与合成从3，5-二羟基苯甲酸出发，通过酯化、取代、还原、甲酰化、缩合、官能团的保护与去保护等反应合成了四个系列16种水杨醛衍生物，其中11中是未见文献报道的新化合物。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。