乙酯

Water, methanol and ethyl acetate extraction method were used to extract non-oil components from Myrtus communis Linn. leaves, and then radical scavenging activity and antioxidant role of these extracts were investigated using four chemiluminescence systems and two colorimetric systems.

采用水提取法、甲醇－水提取法和乙酸乙酯提取法3种方法从香桃木叶中提取非精油组分，然后用4种化学发光体系和2种比色体系检测其清除自由基和抗氧化作用。

Result Extracts of Myrtus communis Linn.leaves not only effectively scavenged O2(superscript -), O H,DPPH and ONOO(superscript -), but reduced or prevented DNA oxidative damage caused by OH and inhibited lipided pexoxidation.

香桃木叶的非精油组分3种提取物均能有效清除O2、OH、DPPH和ONOO，减轻或消除OH对DNA的氧化损伤，抑制脂质过氧化，其中甲醇－水提取物清除O2和ONOO能力最强，乙酸乙酯提取物清除OH和DPPH的效果最佳。

Synthesized polymerizable photosensitive monomer diazo naphthoquinone sulfonate hydroxyethyl methacrylate ether was characterized by infrared spectroscopy and 1H NMR.

田丰，于媛媛，汪长春*摘要：利用红外光谱和核磁共振(1H NMR)对所制备的光敏可聚合单体重氮萘醌苯磺酸甲基丙烯酸羟乙酯进行了表征。

Basic drugs, lidocaine, benghexolum, chlorpromazine, diazepam, clozapine, internal standard of SKF525A(all of 5μg), estazdam and alprazolam (all of 10μg), are extracted from superfatted necrogenic tissues with mixture reagents of ethyl acetate and diethyl ether under basic condition, and determined by gas chromatography with nitrogenphosphorus detector.

在高度腐败及脂肪较多的脏器中加入碱性药物利多卡因、安坦、氯丙嗪、安定、氯氮平及内标物SKF_525A各5.0μg，舒乐安定、佳静安定各10.0μg，在碱性条件下用乙酸乙酯与乙醚混合液提取，经GC/NPD分析。

We have investigated on the chemical constituents of Nepeta partite collected from Gansu Zhuanglang, and twenty eight compounds were isolated from the methanol extraction of this species by chromatography techniques. Twenty five compounds were identified by means of chemical and spectra methods IR, FABMS, EI-MS,〓, DEPT, and 2D NMR）, among which four compounds were new as isopimar-15-en-3β, 8β, 20-triol; phenylethanal-3-O-（2'-glycerin）-5-O-β-D-glucopyranoside; 3-O-linolenoylglyceryl-6'-O-(α-D-galactopyranosyl）-β-D-galactopyranoside; ethyl rosemarinate.

我们对采自甘肃庄浪的康藏荆芥进行了化学成分的研究，利用层析手段从该植物的甲醇浸膏中分离出二十八个化合物，经化学方法和波谱技术（红外，质谱，一维和二维核磁共振谱）鉴定了二十五个化合物的结构，其中四个为新的化合物，它们分别是：异海松-15-烯-3β，8β，20-三醇；苯乙醇-3-O-（2'-甘油基）-5-O-β-D-吡喃葡萄糖甙；3-O-亚麻酰基甘油-6'-0--β-D-吡喃半乳糖甙；迷迭香酸乙酯。

In the experiments, some facters such as the proportion of tetraethyl orthosilicate to coupling agents and distilled water to tetraethyl orthosilicate,the concentration of ammonia,reaction time and reaction temperature were controlled.

研究了正硅酸乙酯与偶联剂的比例、水硅比、氨水用量、反应温度与反应时间等因素对包覆效果的影响，其中重点讨论了偶联剂的添加方式对成膜效果的影响。

Silica sol without ethanol was prepared with tetraethyl orthosilicate as precursor.

以硅酸乙酯为水解前驱体，制备了有机硅水溶胶体系。

TS-1 with MFI topology has been synthesized using tetrae〓hyl orthosilicate and amorphous silica as Si sources.

分别以硅酸四乙酯和无定形氧化硅为硅源合成了具有MFI拓扑结构的TS-1分子筛。

Palmitic acid-silicon dioxide nano-composite phase change material was prepared by sol-gel process from tetraethyi orthosilicate and palmitic acid.

采用溶胶—凝胶法，以正硅酸乙酯和棕榈酸为主原料，制备了一种有机—无机纳米复合相变材料。

Nanu-SiO2 was syrtthesized though hydrolyzation-condensation of n- tetraethyl orthosilicate in organic solvent using sol-gel method.

西北工业大学理学院，西安710072摘要：采用溶胶一凝胶法，利用正硅酸乙酯在有机溶剂中的水解-缩合制备纳米SiO2。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。