乙二酸的质量浓度在夏、秋季高于春、冬季。
The concentrations of oxalic acid in summer and autumn were higher than those in spring and winter.
已二胺和已二酸的短分子可以连接起来形成尼龙的长链分子。
These are chemicals with short molecules which can join together to form the long chain molecules of nylon.
在大多数情况下，配体的酸性越强，目标产物己二酸的产率越高。
In most cases, the yield of target product adipic acid is high if the acidity of ligand is strong.
这样一种方法对于制备双官能单体和合成己二酸的中间体特别有用。
Such a process is particularly useful in the production of difunctional monomers and intermediates in the synthesis of adipic acid.
三氧化钨催化剂重复使用4次，己二酸的分离产率仍可达到70%以上。
WO3 catalyst can be reused for 4 times and the isolated yield of adipic acid is still above 70%.
阐述了硝酸氧化法生产己二酸的过程中两种不同的催化剂回收工艺的异同点。
This paper describes the production of adipic acid nitric acid oxidation in the process of two different catalysts at the similarities and differences in the recovery process.
本文报导通过改变催化剂、氧化剂及改进提纯方法提高己二酸的产率和纯度的方法。
The adipic acid′s productinity and purity were increased mostly by changing the oxidizing agent, the catalyzer and the puricatony method.
红外光谱表明二氧化硅表面硅羟基与己二酸二甲酯酯化产物己二酸的羧基形成氢键。
The FTIR result verified that the hydroxyl groups on the surface of the resulting nano-SiO2 form hydrogen bondings with adipic acid generated by hydrolysis of dimethyl adipate during reaction.
本文报道了以蓖麻油为原料在有机溶剂条件下经微波裂解法制备癸二酸的工艺条件研究。
The preparation of sebacic acid from castor oil by microwave cracking under the condition of solvent is reported.
在此条件下酸洗水中的己二酸回收率可达100%，经过二次结晶后己二酸的纯度超过99%。
At these conditions, the reclaiming yield of adipic acid is 100%, and the purity can be more than 99% by recrystallization.
发现配体种类、用量、反应时间、催化剂的用量、双氧水的用量是合成己二酸的主要影响因素。
The effect of diverse ligands, amount of the ligands, different reaction time, amount of the catalyzer and dosage of hydrogen peroxide was investigated.
本文详细介绍了己二酸的各种生产路线和工艺以及生产过程中产生的废水、废气等的处理方法。
The various technologies of adipic acid producing and the treatment of wastewater and effluent gas produced are introduced.
本文综述了壬二酸的性质，用途及合成方法，介绍了国内外采用臭氧氧化法合成壬二酸的研究进展。
Properties, synthesis application and of azelaic acid are reviewed, and the paper also reviews on recent advances of synthesis by ozonation from oleic acid were introduced at home and abroad.
确定出了各步反应及其产物分离的工艺条件，丁二酸酐、过氧化丁二酸的收率和产品纯度均达90 %以上。
The optimum operating conditions for reaction and separation processes were established. Both yield and product purity of succinic anhydride and peroxysuccinic acid were more than 90%.
测定壬二酸对人表皮黑素细胞和鼠黑色素瘤B16细胞酪氨酸酶活性及黑素含量变化观察壬二酸的脱色素作用。
The influence of azelaic acid on melanin synthesis and tyrosinase activity of human melanocytes and murine B16 melanoma cells were studied.
四丁基溴化铵和四乙基溴化铵的催化效率相当；采用2克相转移催化剂的催化效率大于采用4克催化剂的催化效率；壬二酸的产率随高锰酸钾用量的增加而增加。
The effects of 2 g PTCs used are better than those of 4 g PTCs, and the yield of azelaic acid is raised as the amount of potassium permanganate increases.
中度铅暴露的大鼠应用二巯丁二酸后，效果显著。
The rats with moderate-lead exposure benefited greatly from the succimer.
水滑石和二月桂酸二丁基锡的结合对CPE具有良好的稳定性。
There was good stability for CPE with the combine of hydrotalcite and dibutyltin dilaurate.
研究了3，5二硝基水杨酸的吸收光谱。
The absorption spectrum of 3,5 dinitrosalicylic acid has been studied.
研究了己二酸，癸二酸和草酸对长石和石英浮选性能的影响。
The effects of hexanedioic acid, sebacic acid and oxalic acid on floatation performance of feldspar and quartz were investigated.
二脱氧核苷酸是DNA聚合酶的链延长抑制剂。
Dideoxynucleotide is chain-elongating inhibitor of DNA polymerase.
酒石酸苯二甲酯是一种合成的用于厌食症的刺激剂。
Phendimetrazine Tartrate is a stimulant synthesized for use as an anorexiant.
报道了一种以表面活性剂、丙二烯二胺和柠檬酸、EDTA为主要组分的硫化亚铁清洗剂配方和其在炼油装置应用的情况。
A detergent for cleaning iron monosulfide was formulated with surfactant, diamino-propadiene, citric and EDTA, and its cleaning mechanism was discussed.
第二种聚酰亚胺聚合物是芳香族四酸二氢化物与芳香族二异氰酸酯反应生成的。
The second polyimide polymer is prepared with aromatic tetracid dihydride and aromatic diisocyanate.
这是诊断甲基丙二酸尿症的重要方法。
This is a very important method in diagnosing methylmalonic aciduria.
许多植物的叶子吸收二氧化碳，并使之化合成有机酸。
Leaves of many plants take up carbon dioxide and fix it in organic acids.
许多植物的叶子吸收二氧化碳，并使之化合成有机酸。
Leaves of many plants take up carbon dioxide and fix it in organic acids.
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