查询词典 ethyl acetate

Objective the chemical constituents of the ethyl acetate extract of Lagerstroemia reginae Roxb, Lagerstroemia calyculata Kurz and Lagerstroemia floribunda Jack were studied in this research.

目的：本研究对大叶紫薇、副萼紫薇和多花紫薇乙酸乙酯萃取部分的化学成分进行研究。

The ethyl acetate soluble fraction of the 95% ethanol extract of Lonicera saccata showed obvious ACE inhibitory activity in vitro.

为明确钮子瓜的药用物质基础和袋花忍冬中具有ACE抑制活性的成分，首次对两个植物的成分进行了研究。1。

The free fatty acids were extracted with petroleum ether and were separated on silicon gel column chromatography. The ethyl acetate-soluble lipid fraction and water-soluble lipid fraction were subjected to hydrochloric acid-catalyzed methanolysis, then were extracted with petroleum ether, respectively.

用石油醚提取低极性组分，经硅胶柱层析分离得到游离脂肪酸；用乙酸乙酯提取酯溶性神经酰胺及其衍生脂类，提取物和残余的水溶性脂类分别经盐酸甲醇解，水解产物再用石油醚提取。

Methods: Micromembrane filtration,ethyl acetate-formalin separation,giemsa stain.

微孔滤膜过滤、乙酸乙酯福尔马林分离、G iem sa染色、油镜及相差显微镜观察。

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。

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。

When the mixed-culture system was used to the traditional technology of Shanxi overmature vinegar with 3% inoculum, the yield of alcohol was increased by 14%, the conversion rate of alcohol to sugar was increased by 18.6%, and the content of ethyl acetate was doubled.

以3%的共培养物加入到传统山西老陈醋的酿酒过程中，主要生产指标较传统工艺有显著提高，其乙醇产量提高14%，糖醇转化率提高18.6%，乙酸乙酯的含量提高了1倍。

Methods Cyclohexane, ethyl acetate and glacial acetic acid (8∶8∶0.8) were used as the developing solvent. Samples were analyzed on a layer plate of silica gel G thin by using 20% phosphomolybdic acid as chromogenic agent.

以环己烷乙酸乙酯冰醋酸（体积比8∶8∶0.8）为展开剂，以羧甲基纤维素钠为黏合剂自制硅胶G薄层板，20％磷钼酸溶液为显色剂，进行薄层色谱分析。

The ethyl acetate extract of the Endophytic fungus w-90 from the plant Plantago major L.showed an obvious inhibition effect on bacteria and fungi.

车前草内生真菌w-90是按常规从车前草(P lantago m ajor L。)茎部分离到的，归于拟青霉菌属(Paecilom yces sp。)。其发酵液和粗提物都有一定的抗菌活性。

At the initial isolation to the extract from ethyl acetate, tow kinds of crystal a and b with higher purity were found, and the primary components were 98.45%. Quinic acid and 69.34% L-Proline, 5-oxo-, methyl ester.

在乙酸乙酯部分进行初次分离时，还得到了两种纯度较高的晶体a和b，经GC-MS分析可知其主要成份分别为98.45%奎宁酸和69.34%的5-脯氨酸甲酯。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。