查询词典 aldehyde group

Based on the absorption property of glyoxime which can be formed by addition reaction of aldehyde group and hydroxylamine in the UV-spectral region,spectrophotometric determination of glyoxal in glyoxal solution was proposed.

利用醛基与羟胺在酸性条件下的成肟反应产物乙二醛二肟对紫外光的吸收特性，用紫外分光光度法测定乙二醛的含量。

METHODS: Heparin with an aldehyde group as reducing end was prepared by nitrous acid degradation method.

将肝素钠用亚硝酸降解法降解，得到还原末端为醛基的肝素，分别溶解于二甲亚砜、含0.05 mL，0.5 mL冰醋酸的二甲亚砜溶液，再与对巯基苯胺发生还原胺化反应，用氰基硼氢化钠作还原剂，得到带巯基的肝素衍生物。

Glucose an aldohexose, exists as D and L forms. The furthest asymmetric carbon from the aldehyde group is C-5. D-glucose is called D because the configuration of the atoms bonded to C-5 is the same as for D-gly- ceraldehyde. Similarly D-fructose﹙a ketohexose﹚ is designated D because the configuration

环状结构：醛基或酮基跟一个羟基反应共价闭合，形式上一个糖的醛基和羟基反应生成了一个半缩醛，而一个酮基与一个羟基反应生成一个半缩酮，在同一分子内这个反应能进行，单糖的开链式形成了糖环，葡萄糖环形成一个六碳环。

In this paper, the glyoxal structure both in reagent and in bulking solution were detected by infrared spectro and mass spectra, the result shows that there is no aldehyde group but only hydrate existing in both solutions. Besides, the mechanism of the ac-tion between glyoxal and waterlogged wood is discussed and some problems like how to prevent the bulk-ing solution from acidification are also mentioned.

此外，还运用红外光谱和质谱法测定了试剂乙二醛和加固液的结构，详细讨论了乙二酯在试剂和加固液中官能团的存在形式和聚合状态的细微变化，指出在二种溶液中并不存在醛基，乙二醛仅以水合物的形式存在并讨论了乙二醛与饱水古木的作用机理，提出用醇溶液能有效控制乙二醛使用中易返酸等问题。

IR analysis confirmed the characteristic peak of aldehyde group in the oxidized alginate.

红外光谱测试结果表明氧化产物的分子结构中出现了醛基结构。

It is classified as an aldose, a designation for sugars containing an aldehyde group.

计算器通常可分为串行和同步两类。

That might be the main reason that human heptocellular carcinoma cell acquired the drug-resistance to anticancer drug consisting of active aldehyde group.

其可能是人肝癌细胞产生耐药性的原因之一。3 人肝癌细胞株(HepG2)转染ARL-1基因后，其基因表达谱发生改变。

Any of a class of monosaccharide sugars containing an aldehyde group .

一些澳大利亚词，如澳大利亚土著居民或天主教体现了某种不相容的程度〞

One of them was designed as a potential fluorescent probe to detect aldehyde group reductase in vivo, with a disctinct wavelength movement between the on-off states.

我们对其中一个分子进行结构修饰后，发展了一种基于ICT效应的荧光比率型荧光探针，它的on-off状态之间的波长变化达到了26 nm，今后有望用于体内醛基还原酶的检测。

Any of a class of monosaccharide sugars containing an aldehyde group.

醛缩醇，醛缩二醇任何一种由乙醛和乙醇结合而成的化合物

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。