乙酸的

Results: Fifty volatile compounds of Dracocephalum moldavica L. were identified, and the relative contents of Citral is the highest (31.43%). The second and the third are n-Hexadecanoic acid (16.48%) and geraniol ester (9.02%) respectively. It indicated that Dracocephaluin moldavica L. could be served as an important material for making lemon spice.

结果：鉴定出51种成分，其中柠檬醛含量较高，占总挥发性成分的相对含量为31.43%，其次为棕桐酸(l6.48%)及香叶醇乙酸酯(9.02%)，提示其可以作为制备柠檬香系香料的重要原料。

The paper studies mainly the separation and recovery of low -concentration sodium sulfate - acetic acid-water system in the laboratory and probes into how varied factors affect the electrodialyzer' s limited electricity current density and in separating process performance.

本课题在实验室范围内，对低浓度硫酸钠—乙酸—水物系电渗析分离过程进行了研究，并就各种因素对电渗析器的极限电流密度和分离过程性能的影响进行了探讨。

B Fluoroacetyl-CoA is enzym atically transformed in the citric acid cycle.

循环中被酶促转化。氟乙酸代谢的终产物的结构如何？

Total volatile components, acetone, cyclohexadiene, cyclopentyl ethyne, acetic acid and hexanal contents show more significant correlation with storage time, physiological biochemical indexes respectively, and it can be used as an assessment index for the storage quality of stored maize.

总挥发性物含量、丙酮、对环己二烯、环戊乙炔、乙酸、己醛的含量与储藏时间、生理生化指标呈较高相关性，可作为玉米储存品质变化的评判指标。

It was difficult to extract corn pigments completely, for some of them were in a protein-bind state. It was better to use active carbon for the decolorization of GEON, the conditions were 40℃, stir time 6 hours, the ratio of carbon to hydrolyzate 1: 100 , but as to milk-like powder, it was better to extract pigments after spray drying.

最后，本文对玉米黄素的可抽提性也进行了初步研究，结果表明，部分色素与蛋白质结合而难以抽提，因而有机溶剂难以将色素抽提完全，对Gln活性肽营养液而言，可选用酶解后加活性炭进行脱色，脱色条件为40℃，搅拌6小时，炭液比为1∶100；而对黄粉蛋白乳粉而言，喷雾干燥后用乙酸乙酯脱色，可使酶解干燥后黄粉的异味减轻。

When hydrochloric acid was added into saccharin sodium solution,chemical reaction happened,whose product was glucide,which cannot be dissolved in water,however,it can be dissolved by ethyl acetate,therefore glucide can be extracted from other components,then can be determined by titration with sodium hydroxide.

利用糖精钠与盐酸反应生成不溶于水而溶于乙酸乙酯的物质，将其萃取出来，然后再利用氢氧化钠对其进行滴定分析，采用二分试差法准确测定了某镀光亮镍添加剂中糖精钠及某镀光亮镍液中糖精钠的含量，分别为88。

BACKGROUND: Poly-lactic glycolic acid is a good material for cell scaffold, but its poor cellular affinity and mechanical strength limit its application.

背景：聚乳酸-羟基乙酸是一种较好的细胞支架材料，但细胞亲和性较差、机械强度不够等缺点又限制了它的应用。

OBJECTIVE: To investigate the biocompatibility of poly (DL-lactide-coglycolide). Copolymer ratio of lactide: glycolide was 85:15 or 50:50and evaluate its effect on nerve guidance.

目的：对共聚比为(85：15)及(50：50)的聚乳酸-聚羟基乙酸共聚物材料的生物相容性及神经再生诱导作用进行对比观测。

A HPLC method for determination of hippuric acid in dairy is established, and the development change of hippuric acid in plain yoghurt is studied.

马尿酸(HippuricAcid，HA)又名苯甲酰甘氨酸、苯甲酰氨基乙酸，是食植动物代谢的副产物[1]，为牛乳中的天然成分。

In the pretreatment group, Bak Foong Pill extracts were given for 14 days prior to MPTP. Immunostaining of tyrosine hydroxythase was used to observe the damage of dopamine neurons, and of Bax to detect the protein levels of Bax. High performance liquid chromatography-electrochemical detection was used to investigate the contents of DA and its metabolites dihydroxy-phenylacetic acid and homovanillic in the Str.

给予BFP预处理后，用酪氨酸羟化酶免疫组织化学法观察黑质神经元的变化；同时应用免疫组织化学法检测Bax蛋白表达；应用高效液相-电化学方法检测纹状体巴胺及其代谢产物二羟基苯乙酸和高香草酸的含量变化。

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。