hydroxyl

a hydroxyl group.

羟群。

Methane reacts with hydroxyl to produce formaldehyde.

甲与羟反应生成甲醛

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

对体系所含双氧水浓度测定，以乙酰氯法测量了双氧水丙烯酸酯-苯乙烯共聚物溶液体系聚物羟值。

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

糖酯类物质是由甘油二酯和糖未酯化羟形成。

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

方法将厚朴酚两羟用缩酮保护,再用正己晶分离纯化。

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

果表明，刺槐木素受热后共轭羰、酚羟增多并且有醌型构产生；

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

报道了以对羟苯乙酸为原料,经过苄化、酯化、还原、甙化等步骤成红景天甙一种方法.

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.

以甲丙烯酰氯、甲丙烯酸酐和甲丙烯酸作酰化剂，研究了胆酸甲酯分子中羟反应活性。

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

羟二硫缩烯酮类化物不仅含有烯丙醇构单元,而且双键端位被双硫取代,是有机成中一类要有机中间体。

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.

这些果表明在含羟化物丙交酯/醇铁聚体系中,羟化物作为共引发剂参与了丙交酯开环聚。

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,测定含环氧聚酯羟值。

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

通过分析取代以及交联构对材料激发态影响，我们得出：胺和羟作为推电子取代能够减小发光材料光学能隙宽度，而胺这种作用更大；

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优势构象,果表明,其分子中连二羟处于反交叉位。

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,为较大共轭体系,取代羟接入,对橙酮类化物共面性影响不大。