酚类

In order to explore the mechanism of the resistance to cucumber damping-off induced by plant growth-promoting rhizobacteria CH1, the physiological and biochemical method was employed to study the changes in activities of Phenylalanine ammonia-lyase, Polyphenol oxidase and contents of ferulic acid, chlorogenic acid, lignin, phenolic compound and flavonoid of phenolic metabolism in cucumber roots pretreated with plant growth-promoting rhizobacteria CH1 and infected by Pythium aphanidermatum.

为研究植物生长促生细菌CH1诱导黄瓜对猝倒病的抗性的作用机制，采用生理生化的方法，测定了黄瓜根部酚类物质代谢中苯丙氨酸解氨酶、多酚氧化酶活性动态及阿魏酸、绿原酸、木质素、总酚、类黄酮含量变化。

Amounts of 2 furaldehyde and 5 hydroxymethyl 2 furaldehyde in wood vinegar from the treated wood were increased,but amounts of carboxylic acids,phenols,pyrocatechol,guaiacols,and maltol were almost constant.

与未处理材相比，处理材木醋液中糠醛及5 羟甲基糠醛的收量增加，而羧酸类、苯酚类、邻苯二酚、愈创木酚类及麦芽酚的收量几乎不变。

By tracing the antifungal and antibacterial activities of the volatile oils, it is found that the major active site in fiuit oil of Litsea mollis is aldehydic fraction such as citral, the major active site in oil of Thymus quinquecostatus is phenolic fraction such as thymol and the major active site in ginger oil is high boiling-point terpenic constituents such as β-caryophyllene, eudesm-4 (14)-en-11-ol, et al.

通过抗菌活生追踪发现，毛叶木姜子果油的主要活性部位是醛类成分，如柠檬醛；地椒油的主要活性部位为酚类成分，如百里香酚；姜油的主要活性部位为"高沸点萜类组分"，如β-丁香烯、4（14）-桉叶油烯醇-11等。

This indicated effects of regulation on scenescence of fruit were through influencing the changes of internal ABA content. The relationship between different oxidative enzymes in the flesh and pericarp and ethanol accumulation in different maturity of 'brumal jujube' were investigated.

与果肉相比，冬枣果皮中含有较高的总酚、H_2O_2含量和较低的抗坏血酸含量；果皮中含有两种游离酚酸：儿茶酸、阿魏酸，显著低于果肉中的酚酸种类，贮藏末期果皮中的两种酚酸分别下降了80.36％和59.1％；而且果皮总酚含量与转红率呈显著负相关R=-0.88~(**，推测酚类物质的变化参与了冬枣果皮色泽变化。

We studied the fluorescent capability of Binolate lanthanide complexes. Thefluorescent analysis shows that both ligand and complexes exhibit luminescence. Insolid state and solution, they have the different luminescence mechanism, intensity andcolor. So we can synthesize the complexes of dissimilar fluorescence performance bychanging the state and solvent polarity. According to the literatures, the complexes playan important role in luminescence material and probe with the development of theinformation technique.

对合成的八个邻萘酚稀土配合物进行发光性能研究，通过荧光光谱分析显示，配体和配合物都能够发出荧光，并且在固体状态和溶液中的发光机制、光强度及发光颜色都不同，所以通过改变邻萘酚稀土配合物的状态以及所选溶剂极性的不同，可以得到荧光性能不同的邻萘酚稀土配合物；根据查阅的文献可知，这类配合物在发光方面的应用很少，所以在当前信息显示技术高速发展的今天，邻萘酚类发光稀土配合物在发光器件、荧光探针等材料的研究领域当中不仅具有理论意义还有实际的应用价值。

Concentrations of water soluble phenolic substances in the leaves of male and female trees of Acer negundo L.were successively determined within an entire growing season by method of iron tartrate colorimetric analysis.

采用酒石酸铁比色法对复叶槭雌、雄株叶片中水溶性酚类物质的含量进行了一个生长周期的跟踪测定，对不同性别、不同年龄、不同光照条件下的复叶槭植株叶片中水溶性酚类物质的含量做了比较分析，同时研究了叶片中叶绿素的含量与水溶性酚类物质含量之间的关系。

In leaf tissue of Arabidopsis, the most abundant hydroxycinnamic acidphenolics are sinapate esters, and the most abundant flavonoids are kaempferol derivatives.

拟南芥药用成分主要有酚类化合物，即羟基苯丙烯酸酚类化合物的芥子酸酯，黄酮类化合物的4，5，7-三羟基黄酮衍生物，芥子酸酯与这种黄酮类化合物具有优良的减少紫外线危害和抗氧化作用。

A mathematical model of the relation between ethanol concentration, solid-liquid ratio, time of ultrasonic wave and the extraction ratio of polyphenol in oil-tea seed residue has been established by means of quadratic general rotary unitize design and ultrasonic wave cooperated method.

采用二次通用旋转组合设计试验方法和超声波辅助提取工艺方法，建立了乙醇浓度、料液比、超声时间与油茶籽饼多酚类物质提取率之间的数学模型，绘制了单工艺参数、双工艺参数与多酚提取率之间的函数图像，得出了多酚类物质提取的最佳工艺。

In the enzymatic reaction, the browning substrates are oxidized toο-quinones and finally polymerized into the brown-colored by-products.To identify the browning substrates caused by PPO of pericarp tissues of litchi fruit, the experiments were conducted for the first time to separate, select and purify these substrates.

一般认为荔枝采后褐变主要是由于果皮细胞中多酚氧化酶与酚类底物区域化分布的破坏而导致酶促反应的发生，表现为酚类物质被催化氧化为醌，后者则通过聚合反应形成褐色产物。

These also were significant difference between different areas in Shandong province; for example, the highest mortality rate of the disease in Feicheng county was 41 times as the low death rate in Rushan county.

植物雌激素为杂环多酚类化合物，是一种具有弱雌激素作用的植物成份，主要包括异黄酮、木酚素和香豆雌酚三大类。

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。