醋酸

The results show that acetyl esterification with low DS has no distinct influence on degradation by microorganism.

利用微生物群在半生物体内模型中系统研究了醋酸酯化淀粉的生物降解性能。

The result of experiment indicates that the inversion ratio of acid is 89%, product accords with standard of our country, also catalyst can be used repeatedly, which doesn't pollute environment.

结果表明，催化剂用量为醋酸的40%，酸醇摩尔比为1：1.1，反应时间为1.5h，酸的转化率达89%，产品符合国家标准要求，并且催化剂可重复使用，对环境无污染。

Almost 100% selectivity to cyclohexene could be obtained when the molar ratio of acetic acid to cyclohexane was 12.9∶1 at 450 ℃, the conversion of cyclohexane was 6.9%.

反应温度为450 ℃，醋酸与环己烷的摩尔比为12.9∶1时，环己烷的转化率为6.9%，环己烯的选择性为100%。

Nylon dyeing with acid dyestuffs was carried out with agent NSZ and acetic acid as acidifier individually, dyeing results were compared.

研究了分别以醋酸和染色酸NSZ作为酸剂对锦纶酸性染料染色性能的影响。

Nylon dyeing with acid dyes tuffs was carried out with agent NSZ and acetic acid as acidifier individually,dyeing results were compared.

研究了分别以醋酸和染色酸NSZ作为酸剂对锦纶酸性染料染色性能的影响。

The advantage of this process is to directly obtain acrylate through catalytic reaction of acetic acid and methanol.

本技术以煤化工基础原料合成气的基础产品醋酸和甲醇，经过催化反应合成丙烯酸，工艺技术的特点是可直接获得丙烯酸或丙烯酸酯。

Our factory specializes in the production of polyvinyl acetate latex, is a high viscosity of the white latex adhesive force.

本厂专业生产聚醋酸乙烯乳胶，是具有高粘合力的白色乳胶粘合剂。

With methanol as solvent and NaOH as catalyst,the influence of the concentration of NaOH ,reaction temperature and reaction time to the alcoholysis of polyvinyl acetate is studied by the homogeneous design procedure.

使用均匀设计法研究了甲醇作为溶剂，氢氧化钠作为催化剂时，聚醋酸乙烯酯醇解反应中碱的物质的量比、反应温度和反应时间对聚乙烯醇醇解度的影响。

The aliquot was determined and confirmed by gas chromatography-negative chemical ionization mass spectrometry using external standard method.

样品中三唑醇残留物由正己烷饱和的乙腈(含1%冰醋酸)提取，加入无水硫酸镁与无水醋酸钠振荡促使提取液分层后进行固相分散萃取净化，用气相色谱-负化学离子源质谱法进行测定与确证，外标法定量。

ConclusionThere is good cytotoxicity of the ethyl acetate and acetone extracts from Alocasia macrorrhiza to tumor cells, and no obvious acute toxicity has been observed.

结论醋酸乙酯和丙酮提取物有较好的细胞毒活性，没有明显的急性毒性，这两部分有较好的抗肿瘤前景。

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。