hydroxyl

a hydroxyl group.

基群。

Methane reacts with hydroxyl to produce formaldehyde.

甲基反应生成甲醛

The hydroxyl value analysis of acrylate-styrene copolymcr solution by usillg acetylchloride as an acetylating agent is discussed.

结对体系所含双氧水浓度的测定，以乙酰氯法测量了双氧水的丙烯酸酯-苯乙烯共聚物溶液体系的聚物的值。

Glycolipids (glycosyldiacylglycerols) are diacylglycerols with a sugar attached to the unesterified hydroxyl group.

糖酯类物质油二酯和糖结未酯化的基形成的。

METHODS The hydroxyl groups of magnolol were protected using ketol reaction and the products were purified by recrystallization from hexane.

方法将厚朴酚两基用缩酮保护,再用正己重结晶分离纯化。

The results show that, after thermal treatment, the quinonoid structure is formed and the conjugated carboxide and phenolic hydroxyl are increased;

结果表明，刺槐木素受热后共轭羰基、酚基增多并且有醌型结构产生；

In this paper, synthesis of salidroside was reported starting from 4 hydroxyl phenylacetic acid through benzylation, esterification, reduction and glycosidation.

报道了以对基苯乙酸为原料,经过苄基化、酯化、还原、甙化等步骤成红景天甙的一种方法.

Acylation activity of hydroxyl groups in methyl cholicate has been determined by the use of methacryloyl chloride, methacryloyl anhydride and methacrylic acid as the acylating agents.

以甲基丙烯酰氯、甲基丙烯酸酐和甲基丙烯酸作酰化剂，研究了胆酸甲酯分子中基的反应活性。

hydroxyl ketene dithioacetals possessing an allylalcohol moiety, as well as terminal bisalkylthio substituted alkene are a class of important intermediates in organic synthesis.

基二硫缩烯酮类化物不仅含有烯丙基醇结构单元,而且双键端位被双硫基取代,有机成中的一类重要的有机中间体。

The ring-opening polymerization mechanism of lactide in the presence of hydroxyl compounds was studied by using ferric ethoxide and ferric n-butoxide as catalysts respectively.

这些结果表明在含基化物的丙交酯/醇铁聚体系中,基化物作为共引发剂参了丙交酯的开环聚。

The hydroxyl value of epoxy-containing polyester was determined by analyzing acetification principle and using acetyl chloride as acetifier and methylene chloride as solvent.

通过对其酰化原理分析,选用乙酰氯作酰化剂、二氯甲作酰化溶剂,测定含环氧基聚酯的值。

Analysing the relationship between substitutes, crosslinking structure and excited state,it was found that amidocyanogen and hydroxyl can reduce the bad gap, especially amidocyanogen;

通过分析取代基以及交联结构对材料激发态的影响，我们得出：胺基和基作为推电子取代基能够减小发光材料的光学能隙宽度，而胺基的这种作用更大；

Nuclear magnetic resonance techniques are used to determine the national aleutric acid preferential conformation. The results show that the dithionic hydroxyl radicals are in reciprocal cross bearing.

采用核磁共振谱法测定了国产紫胶桐酸的优势构象,结果表明,其分子中连二基处于反交叉位。

The aurone compounds are generally on one plane ,and they have a bigger conjugate system .The inducement of hydroxyl substituents has little influence on their own geometries .

橙酮类化物分子共面性较强,为较大的共轭体系,取代基的接入,对橙酮类化物共面性影响不大。