邻苯二酚

To observe the oxygen derived free radicals scavenging of diterpenoid tanshinones by pyrogallol autoxidation systems.

目的：探讨丹参二萜醌对邻苯三酚自氧化反应产生的氧自由基的作用。

According to the differences of the materials, there are many methods of synthesis for benzofuranol , such as the pyrocatechol method, the cyclohexanone method, the o-chlorophenol method, the nitrophenol method, the methoxy phenol method, and so on.

根据原料的不同，呋喃酚合成方法可分为邻苯二酚法、邻氯苯酚法、环己酮法、硝基苯酚法、愈创木酚法、邻异丙基酚法、羟基苯异酮法等，文章对前几种较常见的合成方法的原理及工艺进展进行了详细的综述，并展望了呋喃酚合成方法的发展趋势。

Diterpenoid tanshinones have inhibitory effects on autoxidation of pyrogallol. The inhibitory effects are relative to the structures of diterpenoid tanshinones.

一定浓度的丹参二萜醌类化合物对邻苯三酚自氧化反应有抑制作用，其抑制作用的大小与丹参二萜醌的结构有关。

The method of phenanthroline-Fe2+reaction system and autoxidation reaction system of pyrogallol and the system of lipid peroxide were used to measure the antioxidation of the water extraction from C.

本文采用邻二氮菲-Fe2+氧化法，邻苯三酚自氧化法以及卵黄脂蛋白不饱和脂肪酸过氧化体系，对甘青铁线莲花水提取物清除超氧阴离子自由基O2-。

Resorcin salicylic acid 2,2＇, 4-trihydroxybenzophenone ultraviolet absorbent

间苯二酚邻羟基苯甲酸 2，2'，4-三羟基二苯甲酮紫外线吸收剂

The ultraviolet absorbent 2,2′,4-trihydroxybenzophenone was prepared from resorcin ,salicylic acid and phosphorus oxychloride in solvent medium sulfolanc using zinc chloride anhydrous as catalyst.

以间苯二酚、邻羟基苯甲酸和三氯氧磷为原料，环丁砜为溶剂，无水氯化锌为催化剂，合成了紫外线吸收剂2，2′，4-三羟基二苯甲酮。

The compositions herein contain a substantially pure preparation of at least one catecholic butane, including, for example, NDGA compounds in a pharmaceutically acceptable carrier or excipient.

此处的该组合物含有一种基本上纯的至少一种邻苯二酚丁烷，包括，例如，在一种制药学上可接受的载体或赋形剂中的NDGA化合物的制剂。

Phenylenediamines, aminophenols, methoxyanil ines, and 1,4- hydroquinone, 1-naphthylamine were polymerized via the catalysis of horseradish peroxidase in mixed solvents of l,4-dioxane and water at amibient conditions by using hydrogen peroxide as the oxidant. Several factors influencing the polymer yield, such as the concentration of the substrate, pH value and oxidant amount were examined using a- phenylenediamine as substrate.

本文选择了苯二胺、氨基苯酚、甲氧基苯胺三个系列，以及对苯二酚、1-萘胺等单体，在二氧六环-水混合介质中以辣根过氧化物酶为催化剂，以双氧水为氧化剂进行了不同底物的室温酶促聚合，并以邻苯二胺为底物考察了溶剂用量、pH值、作为氧化剂的双氧水用量等条件对聚合物收率的影响。

The main intermediates were detected during decomposition,such as acetic acid,oxalic acid,malonic acid,phenol,3-hydroxyhypnone,naphthalene,benzene sulfonic acid,phthalic acid,β-naphthalene etc . by ultraviolet-visiblespectroscopy,ion chromatographand gas chromatograph coupled with mass spectrophotometertechniques.The possible degradation pathway of Acid Orange Ⅱ was also speculated,that was,hydroxyl radical reacted with the azo linkage-bearing carbon of naphthol-ring,and the C—N cleaved,the azo-dye decolored and mineralized.

运用紫外光谱、离子色谱、色谱-质谱联用等方法，测定出酸性橙Ⅱ的主要降解产物有乙酸、乙二酸、丙二酸、苯酚、3-羟基苯乙酮、萘、苯磺酸、邻苯二甲酸、β-萘酚等，并依此推测酸性橙Ⅱ的降解机理，即羟基自由基攻击酸性橙Ⅱ分子上与萘环相连的C—N键，导致C—N键的断裂，进而染料脱色矿化。

Anion exchange resin was not suitable for the separation as stationary phase due to the strong adsorption toward catechol.The chemicals of eluates were measured by UV and IR.Terpene-catechol resin can be used for preparing copolymeric coating from terpene-catechol resin with raw lacquer.

通过对洗脱液进行紫外光谱分析，表明用中性氧化铝作固定相，分别用汽油、乙醇和NaOH-乙醇溶液洗脱，能较好地分离萜烯树脂和萜烯-邻苯二酚树脂。

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。