查询词典 dicarboxylic acid

In this paper, the direct esterification of carboxylic acid and alcohol by using dealuminated USY as catalyst was studied.

研究脱铝USY 催化羧酸与醇的直接酯化反应，考察了催化剂硅铝比对酯化反应的影响及不同类型酸酶酯化的一般规律。

No carboxylic acid was detected under the experimental conditions.

在实验条件范围内未检测到羧酸副产物。

Activaed organic substrate react with carbon dioxide,which can be changed carboxylic acid in the way.

合成了二苯乙二酮缩双苯胺锰的配合物，研究了其对CO2的固定及催化CO2同有机底物反应。

Process of aluminium hard anodizing in solut io n of composite carboxylic acid with strong current density was developed.

开发出铝在复合有机羧酸中的大电流硬质阳极氧化工艺。

It is found that glassy carbon electrode modified with carboxylic acid group by carbon nanotube functionalized had more sensitivity in adsorption of lead.

试验发现，用羧基化的破纳米管修饰的玻碳电极作为工作电极，对铅离子吸附的灵敏度较高。

For instance, more than 20 herbal medicines contain aristolochic acid, a well-known nephrotoxin and potential carcinogen.

例如，20多种中草药含有马兜铃酸，这是已知的一种肾毒性毒素和可能的致癌物。

The results were as follows, low selenium enhanced content of soluble sugar and amino acid in Cardamine violifolia and Cabbage under 4℃.

结果显示，在4℃条件下，低质量分数的硒增加了白菜和堇叶碎米荠可溶性糖、游离氨基酸的含量。

From the dehydration of acetic acid in industry, novel membranes used for this purpose were prepared by modifying Cardo polyetherketone (which is solvent resistance and hydrophobic) for the first time.

基于醋酸脱水的重要的工业意义，本论文首次以耐化学溶剂性能优异的亲油性材料酚酞侧基聚醚酮为膜材料，通过对其进行改性，制备醋酸渗透蒸发脱水膜。

Polyethersulfone with cardo was a developed engineering thermoplastic and membrane material with high glass transition temperature,PES-C ultrafiltration membranes were prepared by phase inversion method using dimethylacetamide as solvent and oxalic acid and polyethylene glycol as additives.The membrane morphology forming and evolution could be observed by the experimental system and method.The effect of additive and polymer concentration on cast solution and the gelation kinetics of polyethersulfone with cardo asymmetric membrane were studied.

采用耐高温工程塑料——含酚酞侧基的聚芳醚砜为膜材料，草酸和聚乙二醇为添加剂， N，N -二甲基乙酰胺为溶剂，并利用改进的凝胶动力学实验装置和方法，使之能真实地再现不同膜孔结构生长及发展演化的过程，借助相关软件对图像进行处理，考察了添加剂、聚合物浓度对铸膜液凝胶速度的影响，对酚酞基聚芳醚砜非对称膜的凝胶过程的动力学进行研究。

In "The Disappearance of Lady Frances Carfax" and "The Solitary Cyclist," Holmes criticized his friend's abilities with an acid tongue.

在"失踪弗朗西斯Carfax夫人"和"孤独的自行车，"霍尔姆斯批评他的朋友的能力与酸舌头。

Wenxing consistently adheres to the principle of "trict Management,All Member Participation,Quality First,Users Foremost" and follows the business philosophy of excellent quality,highly active and pursue excellence,thus outdoing its counterparts in terms of technology,production scale and administration.

文兴一贯秉承&严格管理、全员参与、质量第一、用户至上&的企业方针，遵循优质、高效和追求卓越的经营理念，从而实现在技术上、规模上、管理上处于同行领先地位。

The left atrium of the guinea pigs was innervated by the two afferent system.

豚鼠左心房受心脏的两个传入系统的双重支配。