乙酸乙酯

And the Honeysuckle's leaves extracts have hydroxy free radical scavenging effects as well. The re-extract by ethyl acetate has obviously scavenging activity when its concentration is 1 mg/mL.

抗氧化实验结果表明，金银花叶乙醇提取物具有一定的抗羟自由基氧化活性，其中乙酸乙酯萃取物在1mg/mL的低浓度下就显示出了较好的效果。

The results indicated that the Honeysuckle's Leaves extracts have extensive antimicrobial activities; The ethyl acetate re-extract possess the strongest antimicrobial activity; The MIC of ethyl acetate re-extract from Honeysuckle's Leaves was 0.38% against Staphylococcus aureus, which was 0.50% against Escherichia coli.

抑菌实验结果表明，金银花叶的乙醇提取物抗菌谱较广；乙醇提取物水溶液的乙酸乙酯萃取物抑菌效果最为显著；测得其对金黄色葡萄球菌和大肠杆菌的最低抑菌浓度分别为0.38%和0.50%。

The tea drinker was extracted with ethyl acetate, and detected with FPD and LCD, the organochlorines and pyrethroids cleaned up with LC-Florisil SPE column.

试样茶汤用乙酸乙酯萃取，其中有机氯和菊酯类农药采用LC-Florisil SPE小柱净化，采用GC-FPD和GC-ECD检测。

Scattered into ethanol, ethyl silicon is medium tetraethyl ortho-silicate in ammonia catalytic hydrolysis, formed under the condition of the negatively charged with PS silica microspheres due to charge effect between by adsorption to PS microspheres surface, core-shell structure.

将其分散到乙醇/水介质中，正硅乙酸乙酯在氨水催化条件下水解，形成带负电性的二氧化硅与PS微球之间由于电荷作用而被吸附到PS微球表面，形成核-壳结构。

First use soap-free emulsion preparation for polystyrene spheres, and the kernel, Reuse are silicon acetic tetraethyl ortho-silicate in ammonia catalytic hydrolysis, formed under the condition of silica, charged by six water or their cerium, six of methylene amine solution HMT (4) into the negatively charged, uniform cerium oxide coated surfaces to PS microspheres, core-shell structure of PS - CeO2 and PS - SiO2 composite microspheres.

首先用无皂乳液制备了聚苯乙烯微球，并以此为内核；再利用正硅乙酸乙酯在氨水催化条件下水解，形成带负电性的二氧化硅，或者利用六水亚硝酸铈、六亚甲基四胺水溶液分解出带负电性的氧化铈，均匀的包覆到PS微球表面，形成核-壳结构的PS-CeO2和PS-SiO2复合微球。

Optimization technology was acetidin: N-hexane (3:7) as low-pole solvent system, methanol: dichloromethane (1:9) as polar solvent system, 20% glycerol filter paper as moisturizer, 14 h age Bacillus subtilis as indicating strain seed on thin layer plate cultivated for 14~18 h, 1% TTC staining time 1~2 h, bacterial mix method suitable to 0.2%~0.6% agar semisolid bouillon culture-medium, bacterial spread method suitable to 1% agar semisolid bouillon culture-medium.

结果：该方法展开系统筛选简单，抑菌斑位置准确、斑点清晰，其优化条件为：以乙酸乙酯：正己烷(3：7)为弱极性展开系统，甲醇：二氯甲烷(1：9)为强极性展开系统，用20%甘油滤纸对湿室保湿，以14h菌龄的枯草芽孢杆菌为指示菌种子液，自显影薄层板36℃培养14~18h，1%TTC显色时间为1~2h，含0.2%~0.6%琼脂的半固体肉汤培养基应使用混菌法生物自显影，含1%琼脂半固体肉汤培养基应使用涂布法生物自显影。

The results showed when the weight ratio of linseed oil to rosin was less than 1.2, the product with following characters could be prepared i.e. molecular weight (averageM 6000~10000, PDI less than 4, n-heptane tolerance in the range of 5~20mL/2g, softening point more than 110℃ and good solubility in mineral oil, vegetable oil, aromatic hydrocarbon, MEK and ethyl acetate and so on. The product might be a new polymer for manufacturing rotary printing inks.

实验表明：m：m＜1.2时，所得产品分子量(平均值M6000~10000，分子量分布范围，庚烷容纳度在5~20mL/2g，软化点＞110℃，可溶于矿物油、植物油、芳香烃、丁酮和乙酸乙酯等溶剂中，是轮转油墨用的一种新型高分子聚合物。

The reversible addition fragmentation chain transfer radical polymerization of vinyl acetate was carried out in ethyl acetate.

在乙酸乙酯溶剂体系中考察了RAFT试剂结构、/、单体浓度对VAcRAFT溶液聚合规律的影响。

The R f value of the glucosamine sulfate was 0.36 measured by paper chromatography with the solvent system of pyridine, ethyl acetate, water and glacial acetic acid (5∶5∶3∶1 in volume).

经纸层析鉴定，以吡啶、乙酸乙酯、水和冰醋酸按体积比 5∶5∶3∶1组成的溶剂系统进行展层，氨基葡萄糖硫酸盐的Rf 值为 0 。36。

The Rf value of the glucosamine sulfate was 0.36 measured by paper chromatography with the solvent system of pyridine, ethyl acetate, water and glacial acetic acid (5:5:3:1 in volume).

经纸层析鉴定，以吡啶、乙酸乙酯、水和冰醋酸按体积比5：5：3：l组成的溶剂系统进行展层，氨基葡萄糖硫酸盐的Rf值为0.36。

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。