取代酸

这些氨取代酸可以与未取代的氧络阴离子相类似方式聚合。

These amine substituted acid may polymenze in an analogous manner to unsubst ituted oxo-anions .

白土高温精制废油再生工艺已经有三套工业化生产装置，它作为取代酸-白土精制的无酸精制工艺，具有明显的经济效益，应予推广。

So far there have been three sets of industrialized reclaimer with the reclamation technique of used oil refined by clay at high temperature The acidless process of replacing acid-clay refinement should be popularized for the good economical benefit .

用色素取代硬脂酸锌抑制PVC蔬菜大棚膜初期着色性

Colorants Substituted for Zinc Stearate to Restrain the Initial Coloring of Green House PVC Film

取代肉桂酸异构体的稳定性和二阶非线性光学性质的DFT研究

DFT study on the stabilities and second-order nonlinear optical properties of the cinnamic acid isomers

六元环硼氮烷对称取代方酸的电子光谱和非线性光学性质的DFT研究

DFT Studies on Electronic Spectra and Nonlinear Optical Properties of Symmetric Squaraine Derivatives Linked with Borazine

包括固体酸取代液体酸的酸催化、晶格氧代替分子氧的氧化、TS1分子筛H2O2的清洁氧化新工艺及羰化催化的新发展。

These technologies include that acid catalysis using superior solid acid substitute for liquid acid catalysts , selective oxidation using lattice oxygen of catalyst substitute for oxygen , cleaner oxidation technology with hydrogen peroxide and TS ( Ti silicalite ), and the future development of carbonylation catalysis .

α-羟基取代膦酸酯类化合物的无溶剂法合成

The Synthesis of α - hydroxy Phosphonate Compounds without Solvents

1，3－取代方酸衍生物的光谱研究及二聚体、簇集体的形成

Spectroscopic study of 1,3-SUBSTITUTED squaric acid derivatives and its dimer , aggregate formation

几种取代酚酸对二氧化锰引起的五氯酚转化作用的影响

Effects of Several Substituted Phenolic Acids on Transformation of Pentachlorophenol Mediated by Manganese Dioxide

1,3取代方酸分子非线性光学性质的有限场方法研究

Investigation of the nonlinear optical properties of 1 , 3-substitued squaraine derivative molecules by finite field method

肿瘤的化学治疗ⅪⅩ.王浆的有效成分&10-羟基-癸烯酸的相似化合物及若干苯环取代肉桂酸的合成

Tumour chemotherapy ⅺⅹ . synthesis of compounds related to 10-hydroxy-decenoic acid and a number of ring substituted cinnamic acids

预示在食品加工业中，槐花精油可以取代山梨酸钾作为栅栏因子抑制致病菌的生长繁殖，从而提高食品的安全性。

This indicated that essential oil can replace potassium sorbate as a hurdle factor inhibiting the growth of pathogens and enhancing food safety during food process .

它们分别是取代桂皮酸桂皮酯类化合物、苯丙烯酰胺类化合物和苯胺乙酰基苯丙烯酸酯类化合物。这三系列化合物的相关生物活性评价正在进行中。

The three series are distinguished as substituted sinapic acid sinapyl esters , substituted cinnamamide derivatives and phenylamine acetyl sinapic acid ester derivatives and their biological activities assay is still in progress .

摘要本文简单介绍了食用香料中的长效和耐高温香料。它们包括缩醛类、长效凉味剂、取代脂肪酸甘油酯和糖苷等。

This paper describes briefly the flavor materials being resistant to high temperature and having a long-lasting taste and odor , including acetals , long-lasting cooling agent , substituted fatty acid glyceride and glucoside .

报道了三种α－取代十四酸衍生物的合成方法，通过元素分析及波谱分析确证了新化合物α－（对硝基苯氧基）十四酸的结构。

Methods of synthesis of three kinds of α - substituted myristic acid derivants are reported . The structure of the new compound α - ( p-nitrophenoxy ) myristic acid is determined by elemental analysis and spectrum analysis .

B位Sn~（4+）取代铌锌酸钡陶瓷及其介电性能

Barium Zincate Niobate Ceramics with Substitution of Sn for B-site Zn and Its Dielectric Properties

原位1HMASNMR测定还表明，被Mo物种取代的B酸中心在反应诱导期内并不能再生。

The in situ 1H MAS NMR experiments also demonstrate that the Bronsted aicd sites , once replaced and occupied by Mo species , can not regenerate during the induction period of the reaction .

具体内容分为三部分：1.以对取代酚作为酸组分，与伯胺和甲醛缩合，分别在室温和加热回流的条件下合成了29种新型Mannich碱。

This thesis is divided into three parts as follows : 4-Substituted phenol , as the acid component , was condensed with primary amines and formaldehyde at room temperature or in the presence of heat to yielded 29 kinds of new Mannich bases .

利用非线性最小二乘方拟合法得到了预平衡步的K1、K2和速控步的k.利用温度系数法得到了相应的活化参数，并讨论了不同取代基对酸分解速率的影响。

The dissociation rate reachs a plateau in strongly acidic solution K_1 and K_2 of the pre-equilibrium steps and k of the rate-controlled step are obtained by means of non-linear least-spuares fitting method , and corresponding activation parameters are also obtained by means of temperature coefficient method .

利用从头算HF/6-31G方法对用苯并五元环取代的方酸衍生物体系SQ1～SQ15进行几何构型优化和电子结构计算。

The geometry structures of squaraine derivatives substituted by benzo five-membered ring moi-ety were optimized and electronic structures were calculated with HF / 6-31G method .

不同取代基马兜铃酸分子稳定性研究

Study on the Molecule Stability of Aristolochia Acid with Different Substituent

5-芳基取代亚甲基巴比妥酸的制备和还原

Preparation and reduction of 5 & arylmethylene barbituric acid

甘二酯是由甘油三酯里的一个羟基取代了脂肪酸而形成的结构脂质。

DAG is a lipid fatty acids by the hydroxy-substituted fatty acids in triglyceride .

加入脂肪酸和羟基取代的脂肪酸，可不同程度地加速亚砷酸盐的反应。

The arsenite reactions can be variously accelerated by the addition of aliphatic acids and hydroxy-substituted aliphatic acids .

根据人造金刚石合成棒中各组分不同的物理、化学性质，提出了一种基于气相氧化分离原理的特殊热解工艺取代传统的酸煮工艺，来实现金刚石与石墨的分离。

Based on different physical and chemical characteristics of each component in synthetic rod , a special pyrolytic technic , lying on the gas phase oxidation separation principle , is proposed to replace conventional acid boiling process , and to realize the separation of synthetic diamond from graphite .

而C-2位芳基取代的噻唑烷酸及醇配体的催化性能则略差。

The thiazolidine ligands with aromatic substituents on C-2 position provided relatively poor enantioselectivity .

酸催化下取代甲醇与芳香酸酯化反应的Ingold-Taft方程聚乙二醇催化下二苯甲醇的合成

Ingold-Taft Equation of the Esterification Reaction of Substituted Methanol with Aromatic Acids under the Catalysis of T_sOH

其中ATMP及其取代物中膦酸基团和羧基上的氧原子的电荷和供电子能力与阻垢缓蚀性能相关性较好。

The atomic charges and abilities of offering electron of the oxygen atoms of phosphonic carboxyl and carboxyl in the ATMP with the substitutes have great relationship of the inhibition efficiency .

A位取代对钨镁酸铅微波性能的影响

Effect of A-site substitution on Microwave Properties of lead magnesium tungstate

第一过渡金属系元素、镧系元素与取代酞酰苯胺酸配合物的合成

Synthesis of complexes of phthalanilic acids with first transition metal series and lanthanide elements