查询词典 acetic

To synthesize aryl pyrimidines by taking benzene, methyl benzene ,acetic ether,1,2-dichloroethane as solvent,the yield and purity of the product are high by taking methyl benzene as solvent.

分别选用苯、甲苯、乙酸乙酯、二氯乙烷作为溶剂合成桂皮酰哌啶，结果表明甲苯作为溶剂时产品纯度高，收率高，可用于大规模生产。

The conductivity and the molar conductivity of the ionic liquid in actone, water, DMF, acetic acid were investigated at different temperatures.

利用磷酸三丁酯与N-甲基咪唑在恒温150℃下一步合成了离子液体1-丁基－3-甲基咪唑磷酸二丁酯，考察了其在丙酮，水，DMF，乙酸溶剂中的电导率及摩尔电导率。

This research also indicated that (1) amount of total phenolic compounds, total flavones and percent of DPPH scavenging activity can be used as discriminate index for different kinds of vinegars,(2) new antioxidant may be formed during acetic acid fermentation period and decoction period, and be worth further researching.

本论文实验还表明：(1)总酚含量、总黄酮含量、DPPH自由基清除活性可作为不同种食醋的鉴别指标之一；(2)食醋酿造醋酸发酵阶段和煎煮过程中可能会生成一些新的具有抗氧化性的成分，可能值得进一步研究。

Nine kinds of vinegars and an acetic acid resolution were measured by the gas sensors array which were composed of ten doped nano-ZnO thick film sensors.

利用由10个掺杂纳米氧化锌厚膜气敏传感器组成的阵列对9种食醋和乙酸溶液进行了测量。

This paper reported the materials doped with oaminobenzoic acid in the silica gels which were prepared by solgel process from the water glass used acetic ether as a latent acidic reagent.

有机发光体以其较高的发光效率、快速响应能力和较宽的可调谐波长被广泛应用于光转换材料、非线性光学材料和激光材料[1-3]。

Objective To establish HPLC-UV method for determination of glycyrrhizin acid in compound nasal spray of glycyrrhizin and flower flos magnoliae,the chief active ingredient of formulation,glycyrrhizin acid,and to observethe therapeutic effect of this formulation on guinea pig's hypersensitive rhinitis.Methods A compound nasal spray formulation was prepared using extracts of glycyrrhizin and measured by HPLC-UV method.Mobile phase conˉsisted of methanol,0.2mol/L ammonium acetate and glacial acetic acid（67:33:1,v/v）,analytical column was Zorbax ODS C 18 and wavelength250nm.

目的 建立测定复方甘草和辛夷喷雾剂含量的方法并观察该制剂对豚鼠超敏性鼻炎的疗效方法以甘草提取的甘草甜素和辛夷花蒸馏提取液主药制备成鼻用喷雾剂，用反相高效液相色谱法测定制剂中甘草酸含量，检测波长为250nm，Zorbax ODS C 18 分析柱，流动相为甲醇：0.2mol/L醋酸铵：冰醋酸（67：33：1）。

In order to research and evaluate the safety of food packaging of plasticizer Di-2-ethylhexyl phthalatein PVC film, the migration rate of DEHP from PVC film into water food simulants (distilled water, 65% aqueous ethanol, 20% aqueous ethanol, 4% aqueous acetic acid) was studied at 17, 30, 40, 50 and 60℃ by Gas Chromatography.

为了研究评判PVC膜中增塑剂邻苯二甲酸二异辛酯在食品包装中的安全性，采用气相色谱仪测试了几种水性溶剂（蒸馏水、65%乙醇、20%乙醇、4%乙酸）在不同温度（17℃、30℃、40℃、50℃、60℃）下对PVC膜中增塑剂DEHP的溶出率。

Then, the prepared PET flakes were immerged into four kinds of food simulants (including n-hexane, 15% ethyl alcohol, 3% acetic acid and water).

而后，分别用4种食品模拟液（正己烷、15%乙醇、3%醋酸和蒸馏水）浸泡制备好的PET薄片。

The results show that DEHP can migrate into all water food simulants from PVC film and the migration rate was the highest in 65% aqueous ethanol with the range 0.85%～6.31% and a big increasing amplitude when contacting temperature over 30℃, the rate was lower in 20% aqueous ethanol and distilled water with the range 0.19%～0.45% and 0.19%～0.37%, respectively; and the rate was the lowest in 4% aqueous acetic acid with the picked out rate 17% and the value ＜0.4%.

研究结果表明，PVC膜中DEHP在几种水性溶剂中均有溶出，在65%乙醇中溶出率最大，范围为0.85%～6.31%，当浸泡温度超出30℃后，溶出率增幅较大；在20%乙醇和蒸馏水中的溶出率较小，范围为0.19%～0.45%和0.19%～0.37%；4%乙酸对DEHP的溶出作用最小，70个样品中，检出率为17%，检出溶出率。4%。

The effects of the content of acetic acid or water in mobile phase, temperature, sample loading and flow rate on the separation were systematically investigated. The fast enantioseparation of these two racemates on monolithic columns were successfully realized.

考察了流动相中添加不同浓度的醋酸和水、温度、进样量以及流速对分离的影响，在这两种整体柱上实现了对其消旋体的快速分离。

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。