查询词典 glyoxylic

Allantoin was synthesized from glyoxylic ,and urea,which the mixed acid was used as catalyst.

以乙醛酸和尿素为原料，混酸作催化剂合成了尿囊素。

During photorespiration the enzyme glycolate oxidase catalyzes the oxidation,by molecular oxygen,of glycolic acid to glyoxylic acid and hydrogen peroxide in the peroxisomes.

乙醛酸在转氨酶作用下转化成氨基乙酸。

In order to obtain 3-methoxy-4-hydroxymandelic acid with high quality and high yield, guaiacol was condensed with glyoxylic acid in an alkaline aqueous solution using solid acid as catalyst. The reaction temperature and reaction time was 15℃ and 18 hours respectively.

为了得到高质量和高收率的3-甲氧基－4-羟基苯乙醇酸，使愈创木酚和乙醛酸在碱性水溶液中在固体酸催化剂存在下进行缩合反应，反应温度15℃，反应时间18h。

The synthesis of glyoxylic acid by ozonization of maleate was studied, the influence of technological parameter on the reaction during ozonization process were investigated.

对马来酸酯臭氧化合成乙醛酸的技术进行了研究，重点考察了臭氧化过程中的工艺参数对反应的影响。

Materials and methods: Postoperative specimens from human parotid and submandibular glands were used. The glyoxylic catecholaminergic histofluores-cence method was employed on the tissues to study the sympathetic innerve-tion. One percent neutral red was used as a counterstain.

本研究以人类下颌下腺及腮腺切除的标本，应用甘草酸与儿茶胺形成之组织萤光法（glyoxylic catecholaminergic histofluorescence method），并采用1%中性红作对照染色，探讨2大唾液腺的交感神经分布。

Glyoxylic acid can be obtained without pH regulation during the reaction, and glyoxylic acid can not be oxidize...

研究结果表明，乙二醛的催化氧化副产物甲酸对乙二醛和乙醛酸的分析没有干扰。

The distribution coefficient of oxalic acid was larger than that of glyoxylic acid,and both of them decreased with the pH. The selectivity of oxalic acid to glyoxylic acid also decreased with pH.

在本实验的条件范围内，草酸的分配系数较乙醛酸大，且随溶液pH值的增大而下降，草酸对乙醛酸的分离系数随pH值的增大而减小。

As an intermediate for preparing vanillin derived from glyoxylic acid, 3, 4-dihydroxymandelic acid is synthesized based on condensation of catechol and glyoxylic acid in alkaline aqueous solution.

以邻苯二酚和乙醛酸为原料，在碱性条件下发生缩合反应，合成了3， 4-二羟基扁桃酸，此物质是多种香料和药物合成的重要中间体。

The separation factor of glycolic acid to glyoxylic acid increased with TRPO concentration from less than 1 to larger than 1. The models parameters K 11 and K 12 in the single acid system can be used to predict extraction equilibrium behavior in the mixture acid systems.

结果表明，随TRPO浓度的增大，分离系数β（glycolic /glyoxylic）由小于1逐渐增大至大于1，乙醇酸与TRPO的萃合物有1∶1和1∶2两种形式，采用单溶质萃取反应平衡常数预测双溶质萃取的结果，预测值与实验值相当接近。

Since 2002, Institute of Coal Chemistry, Chinese Academy of Sciences has been developing a new technology to prepare high-purity glyoxylic acid by maleic anhydride ozonation, which has been completed, and now the research of the downstream products of glyoxylic acid including vanillin, heliotropin and the substituted mandelic acid is underway.

中科院山西煤化所从2002年开始进行研究，完成顺酐臭氧化法制备高纯乙醛酸新技术工艺的开发，现正进行乙醛酸下游产品香兰素、洋茉莉醛、取代扁桃酸的技术研究。

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。