酚

In the brown vascular and green pericarp of blotchy ripening fruit, there are more phenols matter which is an important factor in causing browning.

番茄褐变维管束与绿果肉中有大量酚类物质的积累，酚类物质是产生褐变的一种重要因子。

A method for determination phenolic acid(chlorogenic acid and caffeic acid)in sunflower seed s by HPLC was described.

建立了测定向日葵籽中酚酸含量的高效液相色谱法，同时测定了部分向日葵品种中酚酸的含量。

With 8 kinds of polyphenols as the substrate, the change of polyphenol oxidase activity in different carambola cultivars and during their storage was determined by spectrophotometer method.

方法］以8种酚类物质作底物，采用分光光度计法测定不同杨桃品种果实及其贮藏过程中多酚氧化酶活性的变化情况。

With 8 kinds of polyphenols as the substrate, the change of polyphenol oxidase activityin different carambola cultivars and during their storage was determined by speetrophotometer method.

方法以8种酚类物质作底物，采用分光光度计法测定不同杨桃品种果实及其贮藏过程中多酚氧化酶活性的变化情况。

Methods:To develop the HPLC method for determination of Thymol and Carvacrol ,and compare the physico-chemical property.

高效液相色谱法测定百里香酚和香芹酚的含量，比较理化性质。

Result:The average recovery of carvacrol and thymol were 97\^49%( RSD =1\^78) and 99\^16%( RSD =2\^05) respectively.

结果 ：香芹酚和百里香酚的平均加样回收率分别为 97 4 9%和 99 1 6 %，RSD =1 78和RSD =2 0 5。

Were extracted by sterilize distillation and analyzed by GC-MS, 69 constituents were identified according to NIST MS database, the main constituents were thymol, carvacrol, p-cymene, caryophyllene, terpineol. 27 constituents from this plant were discovered for the first time. The phytochemical study of this plant was also conducted.

通过水蒸气蒸馏法提取牛至挥发油，利用GC-MS现代技术分析，通过NIST质谱库检索，鉴定了挥发油中的69种成分，其主要成分为麝香草酚、香荆芥酚、对聚伞花素、石竹烯、松油醇等；其中27种化合物为首次从该植物中鉴定。

In order to understand the mechanism of anti-inflammatory effect of PA and carvacrol, the superoxide dismutase, glutahoine reductase, glutahoine peroxidase activities in liver and malondialdehyde , cyclooxygenase 2 (COX-2), tumor necrosis factor-α levels were eveluated. Also observed inducible nitric oxide synthase and cyclooxygenase-2 (COX-2) expression and the pathological histology in λ-carrageenan induced paw edema in mice.

本研究首先以醋酸扭体试验评估左手香水抽提物及其活性成分香芹酚是否具有镇痛效果，以福马林舔足试验辨别其镇痛作用是在周边或是中枢，再以λ-角叉菜胶诱导小鼠足跖肿胀试验探讨其抗发炎作用，并分析其肝脏组织中的超氧歧化酶、麸胱甘肽还原酶、麸胱甘肽过氧化酶活性、发炎足跖组织中的脂质过氧化指标产物丙二醛、肿瘤坏死因子-α及环氧化酶-2之含量变化，观察诱导型一氧化氮合成酶及环氧化酶-2之蛋白质表现量，并将肿胀足跖做病理切片观察之，以探讨左手香水抽提物及香芹酚之抗发炎机转。

The recoveries of catechol and hydroquinone are found in the range of 83%-107% and 92%-100%, respectively.

该法用于测定水样中邻苯二酚和对苯二酚，回收率分别为83%~107%和92%~100%。

Catechol is one of the substrate of plant material browning.

邻苯二酚类的酚类化合物是植物材料发生褐变的主要底物。

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。