乙醛

The results showed that alcohol and acetaldehyde obviously restrain the proliferation of astrocytes.

结果表明乙醇、乙醛均可明显抑制星形胶质细胞增殖，乙醛的抑制作用强度明显高于乙醇。

Acetaldehyde removal rate increased with increasing initial acetaldehyde concentration and initial pH value.

乙醛去除速度随乙醛初始浓度和pH值的增加而增加。

The method has been used to determine Phthalic esters in drinking water and seawater sample. 3. Single drop microextraction, followed by gas chromatography with flame ionization detection has been applied to determine Formaldehyde, Acetaldehyde and Acraldehyde in water based on 2,4-Dinitrophenylhydrazine derivatization. Extraction solvent, extraction time and stirrer speed were optimized. Optimal experimental conditions were as follows: 1.6μL toluene microdrop exposed for 30 min in a 3ml aqueous sample placed in 4ml vial and stirred at 600 rpm/min.

以2，4-二硝基苯肼衍生，单滴液相微萃取与气相色谱火焰光度检测器联用测定水样中的甲醛、乙醛、丙烯醛，考察了萃取溶剂、液滴大小、萃取时间、搅拌速度、盐效应等对该方法的影响，并对影响液相微萃取的各种因素进行了系统的阐述，确定了该体系的最佳实验条件，实现了甲醛、乙醛、丙烯醛的提取和富集。

Condensation of phenol and chloral over HY zeolite catalysts was studied in detail.

以三氯乙醛为亲电试剂，在HY沸石催化剂上实现了苯酚和三氯乙醛的二次缩合反应。

The effects of the reaction time,the concentration of chloral and the pH on dechlorination were obtained,and the results showed that the dechlorinate effect was obvious.

实验结果表明，还原铁粉对三氯乙醛有明显的脱氯作用，脱氯率随三氯乙醛质量浓度的减小而增大，随pH值的减小而增大，随反应时间的增加而增大。

At lower temperature, the interaction between the Ir particles and the adsorbed ethoxyl species is not strong enough to abstract H atom from the nearby CH3 group, and thus acetaldehyde acts as the key intermediate. Acetaldehyde can decompose to methane and CO and/or convert to acetone through decarbonylation.

低温时Ir粒子与吸附的乙氧基的相互作用的强度不足以从-CH3基团中提取H原子，此时乙醛是关键的反应中间物，乙醛可以裂解生成甲烷和一氧化碳或脱羰基生成丙酮。

Purified GO could oxidize both glycolate and glyoxylate, and both activities highly depended on FMN. The activity of glyoxylate oxidation was weaker than that of glycolate. During purification or storage of purified GO, the ratio of glycolate to glyoxylate oxidation was progressively enhanced.

纯化的菜心叶片乙醇酸氧化酶对乙醇酸和乙醛酸均有氧化活性，且两者都强烈依赖于FMN，但对乙醛酸的氧化能力相对较弱；在酶的纯化及纯化酶的贮存过程中其两催化活性的比值均呈逐渐升高的趋势。

Hydroxybutyraldehyde, which is main material of synthesizing 3-hydroxybutyric acid was prepared through the aldol condensation of acetaldehyde in this paper. The properly reaction conditions of acetaldehyde condensation and paraldehyde depolymerization was studied and obtained.

本文自行制备了氧化反应的主要原料3-羟基丁醛，并对乙醛羟醛缩合反应及三聚乙醛的解聚反应进行了初步研究，确定了反应的最佳条件。

Acetaldehyde An aldehyde, CH3CHO, that is an intermediate in the conversion of pyruvic acid to ethanol during the final stage of glycol sis during anaerobic respiration in plants.

乙醛：乙醛CH3CHO，在植物无氧呼吸的最后一个环节－糖酵解中把丙酮酸转化为乙醇的中间体。你知道它的英文吗？

These results suggest that ethanol be the major factor in dysfunction of brain development whereas acetaldehyde plays critical roles in other organ teratogenesis.

上述结果提示FAS中的脑发育异常是乙醇独立作用的结果，乙醛则引起FAS中的辅助畸形。关键词醇，乙乙醛胚胎发育胎儿酒精综合征联合作用

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。