乙酸的

Glucose, formic acid and levulinic acid were not detected in the liquors of acid hydrolysis and the concentration of xylose and arabinose was high, while the acetic acid was low. The mixture of monosaccharides and fatty acid was efficiently separated and the whole process of separation was finished within 23 minutes.

通过对样品的分析表明，麦糟水解液中不含有葡萄糖、甲酸及乙酰丙酸，木糖和阿拉伯糖的质量浓度比较高，乙酸的质量浓度比较低，单糖及脂肪酸的混合液得到很好的分离，分离过程在23min内完成。

A catalytic cycle is postulated, in which the oxidative decarboxylation of diphenylacetic acid involves the interaction of a high-valent Mn-oxo species with the substrate.

二苯基乙酸的氧化脱羧可能涉及高价的含氧锰物种与反应物间的相互作用，提出了可能的反应机理。

The results show that the yield of butyl acetate using the catalysts prepared with the concentration of H2SO4 by 0.5 mol·l-1 and the calcination temperature of 550℃ is the best,which is up to 52.5% when the molar ratio of butyl alcohol to acetic acid is 1:1.3 and without addition of entrainer in the hermetic reactor.

结果表明采用硫酸浸渍液浓度为0.5mol/L，焙烧温度为550℃时所制备的催化剂在正丁醇和乙酸的物质的量比为1.3及不添加任何带水剂的密闭条件下酯化效果最好，酯化率为52.5%。

OTUs were got from the 60 clones of eubacterium belonged to 5 phylums, ten of which were HPA communities that can turn the VFAs into H2/CO2 and acetic acid.

测得的60个真细菌序列中共得到17个OTU，分别属于Chloroflexi和Proteobacteria等5个不同的门，10个序列为可利用有机挥发酸生成H2/CO2和乙酸的HPA菌群。

The recovered ionic liquid was reused for four times with gradual decrease in the yield of phenylacetic acid.

在连续的4次离子液体回收利用过程中，随着离子液体使用次数的增加苯乙酸的产率逐渐降低。

Goodcatalytic activities of the phosphine palladium complexes were observed incarbonylation of benzyl chloride with atmospheric CO. In some reactions the yieldof phenylacetic acid was 91% and the catalyst could be reused repeatedly in severaltimes.

这些钯配合物催化苄基氯的常压羰基化反应有较好的催化活性，有些反应中苯乙酸的产率可达91％，可重复使用，是一类环境友好的新型绿色催化剂。

The key point for preparing the isolated 1D metal driven nanowires is the non-stoichemetric additions of metal ions and thiolic ligands.

其中，金属离子与巯基乙酸的非等量反应是分离状态螺旋结构的纳米带形成的主要原因。

In the third chapter, eight new complexes of 4, 6-dimethylpyrimidine 2-thioacetic acid with rare earth metals has been synthesized and characterized by means of elemental analysis, molar conductivity, IR,〓 NMR and TG-DTA. The general formula of the complexes is Ln〓(n=4 or 5). In the complexes, the deprotonated ligand coordinated to the rare earth metal ions in chelate bidentate mode. 4 or 5 molecular of crystal water existed in the complexes.

第三章合成了八种4，6-二甲基嘧啶-2-硫代乙酸的稀土配合物，通过元素分析、摩尔电导、红外光谱、核磁共振氢谱和热重-差热对配合物进行了表征，研究结果表明，配合物的组成为Ln〓n=4或5），在配合物中配体羧基脱去质子后采用螯合双齿的方式与稀土离子形成配位键，同时，配合物中含有4或5个结晶水。

A product containing 0.08% peracetic acid plus 1.0% hydrogen peroxide has been cleared by the FDA as a liquid chem- ical sterilant for use on semicritical medical devices.

一种含有加入1.0％过氧化氢的0.08％的过氧乙酸的产品已经被FDA批准作为液体化学灭菌剂用于中度危险性医疗器械。

The results show that the transition between the ferroelectric phase and the paraelectric phase is postponed,the Curie point of TFTGS single crystals is improved and inner bias voltage field is produced by doping trifluoroacetic acid although the pyroelectric properties of the c.

结果表明，三氟乙酸的掺入虽然使热释电性能有一定程度下降，但却使得晶体铁电-顺电相转变延迟，提高了晶体的居里点，并产生了一定的内偏压场。

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。