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- In this paper,the reaction rule of diketen reacting with different alcohols under acid base catalysis was investigated. 研究了二聚乙烯酮与不同结构的醇在酸、碱催化下的反应规律，并用烷基电子效应的新观点解释了这个规律。
- Keywords diketen;acid base catalysis;acetoacetic ester; 二聚乙烯酮;酸碱催化;乙酰乙酸酯;
- acid base catalysis 酸碱催化
- In specific acid catalysis, the undissociated acids do not contribute. 在特殊的酸催化中，不离解的酸不起作用。
- The chief type of acid base unbalance is respiratory acidosis. 酸碱失衡类型中 ,呼吸性酸中毒占首位 ;
- The corresponding reaction of acetaldehyde is subject to general base catalysis. 乙醛相应的反应服从广义的碱催化。
- Potassium has an important role in the regulation of acid base balance. 钾在人体的酸碱平衡中起到了重要的作用。
- The acid base properties of fluorosilicone rubber(FSR) were studied by inverse gas chromatography(IGC) in detail. 采用反相气相色谱法对氟硅橡胶表面的酸碱性质进行表征。
- Conseqently, the IGC is a simply &quick way of measuring the acid base property of polymers. 采用反相气相色谱法对氟硅橡胶表面的酸碱性质进行表征。
- The common glass bottles pose a risk of eluting sodium and the other elements contained in glass material under acid base condition. 一般常见之玻璃瓶在酸或硷性的情形下会有钠或其他元素溶离出来之缺点。
- Results 83 cases (96.51%) had acid base disturbance,in which the metabolic acidosis with respiratory acidosis was most common (61.63%). 结果 83例 ( 96 5 1%25 )存在酸碱紊乱 ,其中以代谢性酸中毒合并呼吸性酸中毒为最多见 ( 6 1 6 3%25 )。
- Method: The content of SD was measured by acid base titrations and trimethoprim (TMP) was determined by ultraviolet spectrophotometer. 方法:用酸碱滴定法测定磺胺嘧啶的含量,用紫外分光光度法测定甲氧苄啶的含量。
- To investigate the effect of interval hypoxic training(IHT) on aerobic capacity and Acid base balance metabalism by testing of blood gas analysis. 目的是通过实验对大鼠血气分析指标进行测试,进一步研究间歇性低氧训练对有氧代谢能力和酸碱平衡代谢作用的机理。
- In specific acid catalysis, the undissociated acids do not contribute 在特殊的酸催化中，不离解的酸不起作用。
- Eight kinds of probe molecules have been selected to indicate acid base property of hydroxy terminated fluorosilicone oil by inverse gas chromatography(IGC). 采用 I G C法，选择8 种已知酸碱性的探针分子 ，表征羟基氟硅油的酸?碱性质。
- The variation of the desorption activation energy of dichloromethane on activated carbons was discussed with the help of the hard soft acid base(HSAB) princi. 主要研究了金属离子改性活性炭对二氯甲烷脱附活化能的影响。
- Objective:To compare the two methods of content determination for total alkaloids in Tonkin Sophora root.Method: Acid base titration and colorimetric method of acid dye were used. 目的:比较山豆根总碱两种含量测定方法,为山豆根提取工艺优选提供参考。
- prostate specific acid phosphatase 前列腺特异性酸性磷酸酶
- Education should not be restricted to any one specific age group. 教育不应限制在任何特定的年龄组上。
- Asymmetric Lewis Base Catalysis in Hydrogen Transfer Reduction 手性路易斯碱催化的不对称氢转移还原反应
