OBJECTIVE To establish a capillary column GC method for the determination of methoxy and hydroxypropoxy content in hypromellose. 目的建立毛细管柱GC法测定羟丙甲纤维素中甲氧基和羟丙氧基含量的方法。
Orientation Effect of the Methoxy on the Reaction of Electrophilic Aromatic Substitution 甲氧基在苯甲醚亲电取代反应的定位作用
Improvement to the synthesis of methoxy cephalosporin's intermediate 7-MAC 甲氧头孢中间体7-MAC的合成工艺改进
Study on HPLC method for the determination of apiin and 3 ′-methoxy apiin in celery 芹菜中芹菜苷和3′-甲氧基芹菜苷的HPLC检测方法
In addition, compared with acidic lignin from stalk, aliphatic hydroxyl content of the lignin from pith was higher, phenolic hydroxyl and methoxy content were lower; 另外,与秆部木素相比,髓芯木素中醇羟基含量较高,酚羟基和甲氧基含量较低。
Objective: To establish the HPLC method for determination of the content of ethyl ρ-methoxy cinnamate in Qiyinneixiao paste. 目的:建立HPLC对奇应内消膏中山奈所含对甲氧基桂皮酸乙酯含量分析方法。
Determination of the Methoxy Group in Polyether by Reaction Gas Chromatography 反应气相色谱法测定聚醚中的甲氧基含量
SV static mixer was selected to use in ortho-nitrochlorobenzene methoxy reaction. 选择SV型静态混合器应用于邻硝基氯苯甲氧基化反应中。
Analyzed the molecular structure of 4-Hydroxy-3-Methoxy Cinnamylic Acid ( HMCA), and studied the second-order nonlinear optical properties. 分析了4羟基3甲氧基肉桂酸的分子结构特点,研究了其二阶非线性光学性质和固体样品的透光性能。
The principle'procedure and conditions of this method that content of methoxy group in methylcellulose is determined by gas chromatography are described. 本文阐述了甲基纤维素中甲氧基含量的气相色谱法测定的简单原理、方法步骤和实验条件,进行了实际样品的测定。
Research the thermal degradation of pharmaceuticals which has methoxy in the molecular formula using different headspace condition. 在不同的顶空条件下测定头孢西丁钠等药品中的甲醇残留量,考察分子结构中有甲氧基的药品在顶空条件下的热稳定性。
A new approach and the technical parameters for synthesizing ( 6 methoxy 2 naphthanyl) 1 propanone from 2 naphthol via etherification, bromination, propionyl and debromination were experimentally studied. 以2-萘酚为原料,经过醚化、溴化、丙酰化和脱溴合成了6-甲氧基-2-萘丙酮,得到了6-甲氧基-2-萘丙酮各步合成的最佳工艺参数。
Catalytic performances of various acid catalysts for coupling of methyl formate with formaldehyde to form methyl glycolate ( MG) and methoxy methyl acetate ( MMAc) have been investigated in a portable autoclave. 在釜式反应器中研究了甲醛和甲酸甲酯偶联生成乙醇酸甲酯及甲氧基乙酸甲酯反应的各种酸催化剂的性能。
Synthesis of 2-thiol-3-( 4-hydroxy-3-methoxy) phenyl acrylic acid 2-巯基-3-(4-羟基-3-甲氧基)苯基丙烯酸的合成
In order to improve wettability and permeability of 1-naphthyl methoxy acetic acid aqueous solution ( regulative substance of plant growth), which was mixed with SDS and other surfactants. 为了提高植物生长调节物质1-萘甲氧基乙酸溶液的润湿性和渗透性,将其与SDS(十二烷基硫酸钠)等表面活性剂进行了复配。
Total 28 compounds are divided into four different categories: methoxy-substituted, hydroxyl-substituted, acetic acid ( acetic acid ethyl ester), Mannich base of hydroxyl-and dihydroxyl-analogues. 28个化合物分为四种不同结构:甲氧基取代,羟基取代,乙酸(乙酸酯)类和Mannich碱。
Study on Linear and Nonlinear Optical Properties of Three Methoxy Four Hydroxy Benzaldehyde 三甲氧基-四羟基苯甲醛(MHBA)的线性及非线性性能
Synthesis and Catalytic Activity of 4 Hydroxy 3 Methoxy Benzaldehyde Schiff Bases and Complexes 3-甲氧基-4-羟基苯甲醛Schiff碱及其配合物的合成与催化性能
Aim: To study on synthesis and anti-oxidation activities of ( 3-Hydroxy-4-methoxy phenyl) acetic acid. 目的:研究3-羟基-4-甲氧基苯乙酸的合成及其抗氧化活性。
In order to compare the inhibitive effects of different substitute methoxy groups in benzene ring, another type compounds 2.10 were designed and synthesized. 其次,为了比较苯环上不同甲氧基取代对活性的影响,我们在化合物类型2.8的基础上设计合成了化合物类型2.10。
Methoxyphenol reacts with 1 bromopropane in alkali and 1 methoxy 4 propoxybenzene ( MOPOB) is obtained. 用溴代正丙烷与对甲氧基苯酚合成出1-甲氧基-4-丙氧基苯(MOPOB)。
Methoxy polyethylene glycol ( MPEG), which grafted with cellulose diacetate ( CDA), was applied as a modifier. 采用聚乙二醇单甲醚(MPEG)作为改性剂,与二醋酸纤维素(CDA)进行接枝反应。
A pile of tea methoxy benzene class is one of Mouldy important aroma components. 出堆茶甲氧基苯类是赋予普洱茶陈香,霉味的重要香气成分。
MPEG with different molecular weights after carboxylated was occurred esterification reaction to the hydroxyl groups at C-3 on the chitosan backbone, and the comb-shaped methoxy poly ( ethylene glycol) grafted chitosan ( CS-g-mPEG) which can be dispersed in water was prepared. 将不同分子量的mPEG的羟基羧化后,与壳聚糖分子链上3位羟基发生酯化反应,制备出梳形可分散于水的甲氧基聚乙二醇接枝壳聚糖(CS-g-mPEG)。
Firstly, water solubility of the chitosan was improved by methoxy poly ( ethylene glycol)( mPEG) in this paper. 本论文首先利用甲氧基聚乙二醇(mPEG)改善壳聚糖的水溶性。
In this paper, including as follows: ( 1) m-cresol as raw material reacted with chloromethyl methyl ether to generate methoxy-( 3-methyl) anisole in different solvents. 本文研究内容如下:(1)以间甲酚为原料,与氯甲基甲醚在不同溶剂中反应生成甲氧基-(3-甲基)苯甲醚。