aldehydes

Research on correlation of transfer ratio of some aldehydes and esters flavors and cigarettes tar content

一些醛、酯类香料在卷烟中的转移率与卷烟焦油量的相关性研究

A Study on DNA Damage and Biomarkers of Aldehydes

醛类化合物DNA化学损伤机制及生物标志物的研究

Terpenoid aldehydes from induced cotton plants inhibited the germination of conidia of Verticillium dahliae Kleb.

用孢子萌芽法鉴定该物质的抑菌活性，证实对棉花黄萎病菌分生孢子萌发有抑制作用。

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.

The synthesis and application of several amino-alcohols from nitroalkanes and aldehydes were described.

介绍了甲醛与硝基甲烷反应合成几种氨基醇类的产品发展情况及其用途.

As open-chain hydroxy aldehydes and hydroxyl ketenes, the monosaccharides are very reactive.

以开链的羟基醛和羟基酮形式存在的单糖非常活泼。

The thesis investigates aldehydes and ketones in surface water andwater by four aspects as follows.

本文主要分为四部分对水体中的醛酮类化合物进行了研究:第一部分提出了醛类化合物的危害,来源.

The catalytic system also showed good catalytic activity in the oxidation of other aldehydes. Benzaldehyde derivatives with electron-withdrawing group and aliphatic aldehydes were almost quantitatively converted into their corresponding acids.

应用此催化体系催化其它醛的氧化同样表现出较好的催化活性，有缺电子取代的芳香醛和脂肪醛几乎定量生成相应的羧酸。

Results showed that the important flavor compounds contributed to water boiled salted duck meat were possibly some aldehydes and N-, S-, O-containing compounds.

所鉴定的化合物主要是脂肪氧化降解产物，醛类物质、含硫含氮化合物以及呋喃类物质可能是构成盐水鸭风味的重要挥发性物质。

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.

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.

Aldehydes possess anesthetic properties.

醛类具有麻醉的作用.

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.

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.

The Mannich reaction of 4 Aminobenzoate with acetophenone and aromatic aldehydes

对氨基苯甲酸乙酯与苯乙酮和芳香醛的Mannich反应

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.

Synthesis of bis ( indolyl) methanes via electrophilic substitution reactions of indoles with aromatic aldehydes and ketones catalyzed by aminosulfonic acid was carried out in 23-96% yield at 30~ 38 ° C in EtOH aqueous solution under ultrasound irradiation.

超声辐射下在30～38℃的乙醇水溶液中，氨基磺酸催化吲哚与芳香醛或酮反应合成二吲哚甲烷，产率23～96%。

Oxidation of aldehydes yields acids; reduction produces alcohols.

它们很容易氧化成酸或还原成醇.

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.

The corresponding aldehyde acetals were obtained in almost quantitative yields when alcohols were treated with aromatic aldehydes bearing an electron-withdrawing substituent such as a nitro group.

当强吸电子的芳香醛为底物如硝基取代的苯甲醛时，几乎定量给出相应的缩醛产物。

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.

Results show that the essential oils of rhodiola crenulata mainly fatty acid, terpene, alcohol and a small amount of esters, ketones, aldehydes, paraffin, phenols and other ingredients.

结果表明，大花红景天的挥发油主要是脂肪酸类、萜类、醇类及少量酯、酮、醛、烷烃、酚类等成分。

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

醇和醛两者为氧化的次级产物.

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.

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.

The keto form predominates in many aldehydes and ketones , the enol form in ph enols.

在许多醛和酮中酮基都是最主要的组分.

Ten organotin compounds have been synthesized by acylation and condensation of triphenyltin 4-aminobenzoate with organic anhydrides and aromatic aldehydes.

4-氨基苯甲酸三苯基锡酯与酸酐和醛进行酰化和缩合反应，合成了10个N-三苯基锡基胺羰基苯甲酸和亚胺类化合物。

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 ).

In comparison with pre-fermented soymilk, all the three soymilk yoghurts showed significantly higher contents of ketones and acids but significantly lower contents of aldehydes and alcohols.

感官评定结果表明，乳酸菌种及其混合比例对发酵酸豆乳的香气有明显影响。

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.