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However, the presence of steric hindrance and electron-withdrawing groups on the benzene ring would decrease the activity of phenols.

苯环上有供电子基团的酚类化合物反应活性比较好，而钝化基团的存在，则会降低酚羟基的反应活性。

The largest absorbion of the product of the reaction between PPO and catechol was at λ=410nm.

通过对澳洲青苹多酚氧化酶与邻苯二酚反应产物的重复波谱扫描，方便快速的确定了量化反应产物含量的特定吸收波长λ＝410nm。

Lidocaine hydrochloride reacts with phenol red or chlorophenol red to form an ion-association complex, the colours of solutions change obviously, the maximum absorption wavelength at 556 nm (PR-LDCI system) and 572 nm (CPR-LDCI system), the adding colours intensity is also proportional to the concentration of lidocaine hydrochloride, to develop spectrophotometric method of determination of lidocaine hydrochloride.

酚红、氯酚红分别与盐酸利多卡因作用，形成离子缔合物，溶液颜色发生明显改变，最大吸收波长分别为556 nm、572 nm，在对应波长处，盐酸利多卡因的浓度与溶液的增色程度呈良好线性关系，从而建立测定盐酸利多卡因的光度法。

1H NMR spectroscopic analysis of aromatic protons combined with theoretical analysis of molecular structures proved the existence of two rotational isomers at 300 K, as well as a rapid interconversion equilibrium at 330 K for both compounds Ⅰ and Ⅱ. However, only one conformer exists for compound Ⅲ and puerarin containing 7-phenolic hydroxyl instead of propyl in A-ring as the case of compounds Ⅰ and Ⅱ. Based on UV-Visible absorption data of neutral and basic solutions, and on the density function calculations, the 7-phenolic hydroxyl group in A-ring was found to be more acidic than the 4'-phenolic hydroxyl group in B-ring. The mechanism of derivation reaction and the structure-reactivity relationship of puerarin as an antioxidant were further discussed.

其中7-丙基葛根素Ⅱ属于新型取代衍生物；变温1H NMR和理论计算结果表明，在300 K时，葛根素和4'-丙基葛根素以单一构型存在；而7，4'-二丙基葛根素和7-丙基葛根素则存在两种核磁可分辨的旋转异构体，当温度升至330 K时，两种异构体可以相互转化；通过对比分析葛根素及其衍生物脱质子产物的紫外可见吸收光谱并结合理论计算，确定了A环上7位酚羟基比B环上4'位酚羟基先脱去质子，并由此进一步阐明了葛根素衍生化反应机理以及在抗氧化作用中可能的活性位点和结构活性关系。

Some methods could be used to reduce the gossypol content in cottonseed oil and improve the quality of the final meal,such as wet moisturizing cooking,diluted caustic cooking and wet expanding and so on.

碱炼是公认的脱除棉酚最有效的方法，但炼耗较高。在脱除棉酚和磷脂后棉籽油也可以进行物理精炼，并可获得良好的工艺效果。

Methods: Solubility and water oil distribution coefficient of the complex were studied, and compared with kaempferol-3-O-rutinoside.

制备山萘酚－3-O-芸香糖苷的磷脂复合物，测定其与山萘酚－3-O-芸香糖苷的溶解度，并对两者的水油分配系数进行分析。

Polyphenol compounds were extracted from the sorghum groats by water and methanol. Total phenolic content, reducing power, chelating activity, DPPH radical scavenging activity, ABTS radical cation scavenging activity and inhibition of hydroxyl radical-mediated 2-deoxy-D-ribose degradation of the extracts from the sorghum groats were determined.

以水和甲醇为溶剂提取高粱籽粒中的多酚类化合物，测定了提取物中的总酚含量、还原力、Fe~(2+)络合能力以及提取物对DPPH、ABTS、羟基自由基的清除能力。

Pentachlorophenol is one of the most toxic organic pollutants and is difficult to be degraded among the chlorophenoxies.

五氯酚是氯酚族中最具毒性和最难降解的有机污染物，其废水的处理一直受人关注。

Results: Epinephrine significantly increased the lipid peroxidation of erythrocyte membrane up to 19%（P〈 0.05）, however, noradrenalin had little effect.

观察儿茶酚胺自氧化对红细胞的过氧化作用，并以乙肝病毒表面抗体为代表靶，观察儿茶酚胺自氧化对抗体活性的影响。

The quick results cold capsule contains have calculus bovis factitius , pedantic chlorobenzene pain namely agile , caffeine and acetophenetidin aminophenol internally , is that one kind of the people who is not that steroid is similar to analgesic-antipyretic , irritability body constitution is convinced among them to acetophenetidin aminophenol 责任编辑:admin

速效感冒胶囊内含有人工牛黄、酸氯苯即敏、咖啡因和乙酰氨基酚痛，其中对乙酰氨基酚痛是一种非类固醇类解热镇痛药，过敏体质的人服用，可致粒细胞减少，过敏性皮炎；若肾成果减退的病人服用，可致间质性肾炎，以致引起急性肾成果干涸。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。