Objective To set up a method for determining the protocatechuic aldehyde in Qingshenjianfei tablets.

And the contents of cinnamic aldehyde and menthol were determined synchronously by GC.

并用气相色谱法对制剂中肉桂醛和薄荷醇进行定量测定.

This reaction involves disproportionation of the aldehyde.

这个反应就是醛的歧化作用.

This method applies for measuring aldehydes in hydrophobic adhesives with relatively low aldehydes content.

本方法适用于分析醛类含量较低的疏水性胶粘剂中的醛类物质.

In the presence of acetic acid, p-anisidine reacts with aldehydes producing a yellowish color.

在乙酸存在下, p - 茴香胺与醛类反应产生黄色.

Using benzene as internal standard, the calibration factors of derivative of aldehydes 2,4-dinitrophenylhydrazine ( DNPH ) were measured.

将醛类物质与2, 4- 二硝基苯肼 ( DNPH ) 的衍生反应液直接进样,以苯为内标物,测定了甲醛 、 乙醛等醛类物质DNPH衍生物的校正因子.

Six dimethylsilyl bis -- enol others of aldehydes are synthesized and the yields are good.

合成了六个醛的二甲硅基双烯醇醚,产率较高.

The bactericidal power for sulfate-reducing bacteria of fourteen aldehydes of different chemical structure is investigated experimentally.

醛对硫酸盐还原菌的杀菌能力与其分子结构有密切关系.

Oxidation of aldehydes yields acids; reduction produces alcohols.

它们很容易氧化成酸或还原成醇.

Aldehydes possess anesthetic properties.

醛类具有麻醉的作用.

The technique is also suitable to synthesis of other aromatic aldehydes.

该工艺也适用于其它芳香醛的制备.

Simple examples of aldehydes are methanal ( formalaehyde , HCHO ) and ethanal ( acetaldehyde , CH 3 CHO ).

简单的醛有甲醛(HCHO ) 和乙醛 ( CH3CHO ).

STUDIES ON THE REACTION BETWEEN ALDEHYDES AND 1, 2-BIS ( p-TOLYL-AMINO ) ETHANE.

醛类与1, 2- 二 ( 对甲苯胺基 ) 乙烷作用的研究.

These reactions are therefore used to discern between ketones and aldehydes.

这些化学反应因此被用来区分醛类和酮类.

REDOX Relationships amongst Alcohols , Aldehydes and Ketones and Carboxylic acids.

醇, 醛与酮和羧酸之间的氧化还原关系.

The technique is applicable to other impurities such as aldehydes and alcohols.

该技术可用于其它杂质,例如醛和醇.

The yields of aldehydes produced in this sequential process are comparable to the two-step method.

用此法制得的醛,其产率与用两步法可制得的产率不相上下.

Both the alcohols and aldehydes are secondary products of the oxidation.

醇和醛两者为氧化的次级产物.

The new wave of pressure, however, is unlikely to significantly alter Beijing's approach, predicts Alden.

然而, 新一轮的压力未必改变北京的思路, 奥尔登预言.

Letters written by Alden and full of the name of Priscilla!

奥尔登的信上写满了普丽西拉的名字!

Together, they raised two sons: Hervey Alden and Connelly Moore.

他们共同提出了两个儿子: 赫维奥尔登和康纳利摩尔.