溶剂

METHODS The antioxidant of 75% ethanolic extract and organic solvent extracts, water extracts and polysaccharids from Acanthus ilicifolins L.

方法采用流动注射化学发光法，研究该植物75%乙醇提取物及其有机溶剂萃取分离部分、水提取物及多糖对过氧化氢(H2O2)的清除作用。

The catalyst conditions of 1,3-propanediol were researched, such as main catalyst, accelerant , solvent, etal.

针对一步法和二步法的技术路线，考察了不同催化条件对反应结果的影响，如主催化剂、膦配体、促进剂、活化剂和溶剂等。

Methylicamine II is mainly used in chemical impregnant, rubber accelerant, medicine, pesticide, and dynamite etc.

二甲胺主要用于化学溶剂、橡胶促进剂、农药、医药、皮革去毛剂、推进剂和炸药等。

Acenaphthene was dehydrogenated to afford acenaphthylene by photochemical reaction with N bromosuccinimide in benzene with the addition of quinoline at room temperature and atmospheric pressure was studied.

在常温常压下，以苯作为溶剂，加入喹啉，使苊与N－溴代丁二酰亚胺发生光化学脱氢反应生成苊烯。

The macro conjugated molecule fluorene derivative has 2, 3, 6, 7-tetraamino-9, 9'-dialkyl fluorene as a raw material which is added to an organic solvent respectively together with phenanthrenequinone, acenaphthene quinone or bis-carbonyl pyrene derivatives and strong base; under the protection of inert gas, reflux reaction is carried out to the materials, so as to prepare a series of trapezoidal conjugated molecules containing fluorine structures.

本发明涉及一类含大共轭分子的芴衍生物及其制备方法，大共轭分子芴衍生物是将原料2，3，6，7-四氨基-9，9'-二烷基芴，分别与菲醌、苊醌或二羰基芘的衍生物以及强碱加入到有机溶剂中，在惰性气体的保护下，回流反应制得一系列含有芴结构的梯形共轭分子。

A novel Pd／C catalyst with high activity,high selectivity and good stability developed by our group was used for the hydrogenation of N-（3-nitro-4-methoxyphenyl）acetamide into N-（3-amino-4-methoxyphenyl）acetamide in methanol and water,respectively.

笔者开发了一种高效的Pd／C催化剂，分别选用甲醇和水作为反应溶剂，实现了高活性、高选择性和高稳定性地催化加氢制备N-（3-氨基-4-甲氧基苯基）乙酰胺。

PLA grafted with PAA has been used as material for preparation of particles. Without using surfactant, and with dimethyl acetamide as solvent and with hexane containing 4% isopropanol as precipitation solution, PLA particles have been prepared with a diameter between 700 and 1250 nm.

聚乳酸接枝聚丙烯酸的高分子化合物，用於制备微粒，二甲基乙醯胺为使用之溶剂，己烷及4%异丙醇为所需之沉淀溶液，界面活性剂并未使用，所得微粒平均粒径大小为700-1250 nm。

Methods Protein in blood and urine was precipitated directly by acetonitrile with acetanilide was used as the internal standard using Agilent Zorbax SB-Aq column (250 mm×4.6 mm, 5 μm). The mixed solvents of water (triethylamine 0.12%, acetic acid 0.12%) and acetonitrile were used as the mobile phase to separate cephalosporins using gradient elution method at 1 mL/min and 254 nm.

以乙酰苯胺为内标，血液和尿液用乙腈直接沉淀蛋白，采用Agilent Zorbax SB-Aq(250 mm×4.6 mm， 5 μm)色谱柱，流动相选用水（含0.12%三乙胺和0.12%乙酸）和乙腈的混合溶剂梯度洗脱，流速1 mL/min，检测波长254 nm。

It was found that ethyl acetate was the optimal organic solvent.

结果表明，乙酸乙酯是最理想的有机溶剂。

It can just react in aqueous acetic acid and only when the concentration is as high as 50vol.

溶剂和还原剂种类对分子氧氧化的苯经基化反应有着至关重要的作用。

She gently rebuff ed him, but agreed that they could be friends

她婉言拒绝了，但同意作为朋友相处。

If in the penal farm, you were sure to be criticized.

要是在劳改农场，你等着挨绳子吧！