乙酸乙酯

The extract of acetyl acetate have been studied on inhabited effect of 4 species bacteria.

乙酸乙酯萃取物对4种细菌的抑菌试验表明，其对枯草芽孢杆菌的抑制效果最好。

Aloin is unstable when dissolved in methanol, acetyl acetate was appropriate for use as the solvent in standard solution.

芦荟苷在甲醇溶剂中不稳定，甲醇不适宜做芦荟苷标准样的溶剂，宜改用乙酸乙酯。

Methods The plasma was alkalified by ammonium hydroxide, and fluconazole was extracted by acetic ether; and methyl parahydroxybenzoate was used as internal standard.

以对羟基苯甲酸甲酯为内标，血浆用氨水碱化后，用乙酸乙酯提取，测定血浆中氟康唑的浓度。

Methods: Oncomelania hupensis was immersed in different concentrations of extracts from Sarcotesta of Ginkgo biloba by benzinum, acetic ether or absolute alcohol. Molluscidal effects were observed at 24,48,72,96 h, and compared with those of extracts from sarcotesta of Ginkgo biloba combined with arecoline.

将经石油醚、乙酸乙酯和无水乙醇提取的银杏外种皮提取物稀释成不同浓度，用浸杀法观察24，48，72，96 h的杀螺效果；并与槟榔碱水提物联合用药的杀螺效果进行比较。

Results: Using of handy infrared gas spectrometer, the ammonia, sulphur dioxide, acetone, butanone, ethyl acetate, chloroform, benzene, toluene, methyl alcohol, ethyl alcohol, isopropanol, and other harmful gases can be carried out quickly Online Testing. The arsine, hydrogen chloride, hydrogen cyanide, hydrogen sulfide can not be detected online.

结果：可利用便携式红外气体分析仪对氨、二氧化硫、丙酮、丁酮、乙酸乙酯、氯仿、苯、甲苯、甲醇、乙醇、异丙醇等有害气体可进行快速的在线检测，不能对砷化氢、氯化氢、氰化氢、硫化氢进行快速在线检测。

The oil was extracted from ascidian with supercritical fluid CO 2 and ethyl acetate , and the antioxidant activity of the oil was studies with OSI.

分别用乙酸乙酯和超临界CO2提取海鞘中的油脂，并对它们的氧化稳定性进行研究。

Because fatty oil extracted from ascidian contains a relative high concentration of polyunsaturated fatty acid and can be oxidized easily, it is necessary to add appropriate antioxidant in the fatty oil to prevent it from being oxidized.

研究发现，维生素E和中草药荔枝草的乙酸乙酯提取物对海鞘油脂具有很好的抗氧化作用。

Two kinds of oil were extracted from Styela clava and Ciona intestinalis Linnaeus by supercritical fluid CO2(SCF-CO2) and ethyl acetate. The results show that the two kinds of oil extracted from ascidian all contain high levels of plural unsaturated fatty acid, which are 89.84%(SCF-CO2) and 75.78% from Styela clava, 69.77%(SCF-CO2) and 61.11% from Ciona intestinalis Linnaeus respectively. The antioxidant activities of natural components extracted from Salvia miltiorrhiza were investigated on the oil extracted from ascidian.

分别用乙酸乙酯和超临界CO2提取柄海鞘和玻璃海鞘中的油脂，得到了多不饱和脂肪酸含量很高的海鞘油脂，即柄海鞘含有89.84%（超临界CO2提取）和75.78%的多不饱和脂肪酸，玻璃海鞘含有69.77%（超临界CO2提取）和61.11%的多不饱和脂肪酸。

And Bauhinia purpurea could inhibit vibrio. And the extracts, extrated with petroleum ether from leaves of Melia azedarach L. and Bauhinia purpurea can inhibit Vibrio parahaemolyticus, too. The remainder extracts of Mangifera indica Linn.showed strong inhibition effect on Vibrio tubiashii. While the extracts of Eriobotrya japonica showed no inhibition effect.

结果 夹竹桃叶、芒果叶、苦楝叶和羊蹄甲叶4种中草药乙酸乙酯萃取部分对供试弧菌有很好的抑菌作用；苦楝叶和羊蹄甲叶石油醚萃取部分对副溶血弧菌有抑菌作用；芒果叶的水溶性部分对塔氏弧菌有很强的抑菌作用；枇杷叶提取物对4株弧菌均无抑制作用。

The reaction was carried at 50 ℃ for 5 hours, ethanol from the reaction was removed by distilling the azeotrope of ethyl acetate and ethanol to complete the reaction.

反应在50 ℃下进行5 h，以过量的乙酸乙酯与生成的乙醇共沸除掉乙醇，使反应进行完全。

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。