酚类

It would not be expected to occur as readily as the oxidation of an amine or phenolic antioxidant.

它不及胺类或酚类抗氧剂的氧化速率快。

The effects of the composition of catalyst (the structure and amount of bident ligand and strong acid, the cocatalytic activity of Cu〓, the roles of methanol and phenol etc.) and the copolymerization condition (the reaction time, temperature, amount of ST and CO, the structure and amount of dilution reagent etc.) on catalytic activity were studied in detail. Also the optimum copolymerization condition was chosen.

深入考察了催化体系组成（含氮双齿配体的结构与用量、强酸的结构与用量、铜盐的助催化作用、醇类与酚类化合物的作用等）和沉淀共聚反应条件（共聚反应的温度与时间、稀释剂结构与用量、苯乙烯与一氧化碳量等）对该共聚反应的催化活性的影响，优化共聚反应的聚合条件。

Bulbil ; antioxidative activity ; total phenolic content ; ferulic acid ; p-coumaric acid ; cooking ; future ; after

山药零余子；抗氧化活性；酚类化合物；阿魏酸；香豆酸；水煮；总类黄酮；乙酸乙酯；尿囊素；总含量；方程式

The research suggested that American white oak is the best choice for the production of grape wine with strong oak aroma and European oak is the best choice for the production of grape wine with harmonious oak aroma, fruit aroma and wine aroma; air drying process of barrel plates would influence the content of total phenol, tannin and volatile substances including vanillin and MOL; and baking intensity will change original content of chemical compositions in oak and make oak barrel possess different aroma characteristics and phenol substance content.

研究表明，酿制橡木香较浓郁的葡萄酒选用美国白栎较好，酿造橡木香、果香、酒香协调的葡萄酒则选择欧洲橡木较适宜；板材风干过程对橡木板材中的总酚、单宁含量及挥发性香气物质香兰素和橡木内酯的含量均有影响；烘烤强度可改变橡木木材原有的化学组分含量，使橡木桶具有不同的呈香特性和酚类物质含量。

When oxygen is present in cells, polyphenol oxidase enzymes in the chloroplasts rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colorless precursors to brown-colored secondary products.

当氧存在于苹果组织的细胞中时，叶绿体（含有叶绿素和进行光合作用的地方）中的多酚氧化酶，会迅速地将天然存在于苹果组织中的酚类化合物氧化为邻醌。

Fruits and beverages such as tea, red wine, cocoa, and coffee are major dietary sources of polyphenols, micronutrients found in plant-derived foods.

水果和饮料，例如茶、红酒、可可饮料和咖啡是主要的多酚类物质的饮食来源，多酚是一种存在于植物食物中的微量营养素。

Objective To study the effect of high pressure alone or combined with heating treatment of fresh pear juice on PPO activity in it.

水果中的多酚氧化酶催化酚类物质在有氧气的条件下生成褐色物质称为酶促褐变，鲜榨梨汁生产的一大难题是防止酶促褐变。

Two free radical scavenging capacity of the top three ranks are: thyme, ylang ylang, citronella oil; oil mostly contains polyphenols, a relatively high content of total phenols were the top three as follows: clove oil, thyme, benzoin.

两种自由基清除能力前三名排名皆为：百里香、依兰、香茅油；精油大多含有酚类物质，总酚含量相对较高者前三名为：丁香油、百里香、安息香。

With TEMPO(5 mol%) as the catalyst,N-methyl-N-phenyl-hydrazine(1.2 equiv.) as the amine source,the direct ortho-amination of 2-naphthols could be easily achieved.The reaction was carried out at room temperature under air atmosphere.

以5 mol%TEMPO为催化剂，1.2当量N-甲基-N-苯基肼作氨源，二氯甲烷为溶剂，空气中，室温下，实现了对2-萘酚邻位氨基化，可以高效的合成1-氨基-2-萘酚类化合物。

With TEMPO(5 mol%) as the catalyst,N-methyl-N-phenyl-hydrazine(1.2 equiv.) as the amine source,the direct ortho-amination of 2-naphthols could be easily achieved.

以5 mol%TEMPO为催化剂，1.2当量N-甲基-N-苯基肼作氨源，二氯甲烷为溶剂，空气中，室温下，实现了对2-萘酚邻位氨基化，可以高效的合成1-氨基-2-萘酚类化合物。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。