甲醇

To study the bioactive components from water soluble extract of the Chinese eaglewood, various column chromatography of Chinese eaglewood led to the isolation of ten compounds. Their structures were elucidated as 2,3-bis(3-hydroxyphenyl)- propan-1-ol (1), [(2R,3R)-3-(4-amino-3,5-dimethoxyphenyl)oxiran-2-yl]methanol (2), 8-chloro-4'- methoxy-5,6,7,3'-tetrahydroxy-2-(2-phenethyl)-5,6,7,8-tetrahydrochromone (3), 4'-methoxy-5,6,7,3'-tetrahydroxy-2--5,6,7,8-tetrahydrochromone (4), the isomer of 4 (5), 4'-methoxy-5,6,7,8-tetrahydroxy-2-(3'-hydroxyphenethyl)-5,6,7,8- tetrahydrochromenone (6), 4'-methoxyisoagarotetrol (7), 6-hydroxy-2-(2-hydroxy-2- phenethyl)-chromone (8), 6-hydroxy-2-(2-phenethyl)-chromone (9), 6-hydroxy-2-(4'- hydroxy-2-phenethyl)-chromone (10), and Guaiacylacetone (11) by means of spectral analysis and comparison with references.

为了进一步发现沉香中具有生理活性的化学成分，本文对国产沉香的水溶性成分进行了研究，从中分离得到11个化合物，通过红外、紫外、质谱、核磁共振(1H-NMR， 13C-NMR， COSY， HSQC， HMBC， ROESY)波谱解析，分别鉴定为：2，3-二(3-羟基苯基)-丙-1-醇(1)，[(2R，3R)-3-(4-氨基-3，5-二甲氧苯基)-2-氧化烯基]甲醇(2)，8-氯-4'-甲氧基-5，6，7，3'-四羟基-2-(2-苯乙基)-5，6，7，8-四氢色原酮(3)，4'-甲氧基-5，6，7，3'-四羟基-2-(2-苯乙基)-5，6，7，8-四氢色原酮(4)，化合物3的差向异构体(5)，4'-甲氧基-5，6，7，8-四羟基-2-(3'-羟基-2-苯乙基)-5，6，7，8-四氢色原酮(6)，4'-甲氧基异沉香四醇(7)，6-羟基-2-(2-羟基-2-苯乙基)色原酮(8)，6-羟基-2-(2-苯乙基)色原酮(9)，6-羟基-2-(4'-羟基-2-苯乙基)色原酮(10)和Guaiacylacetone (11)。

In the buffer solution of HAc-NaAc at pH 3.5, Cr reacts with chrysin by molar ratio 1:3, and forms a highly fluorescent active complex in the presence of some methanol. The maximum excitation and emission wavelengths of the complex are 260 nm and 429 nm respectively.

在含一定量甲醇的pH=3.5的HAc-NaAc缓冲溶液中，铬与白杨素能形成1：3的二元荧光配合物，其最大激发波长和发射波长分别为260 nm和429 nm。

To determine the content of Emodin and Chrysophanic Acid in Liuwei'anxiao Capsules by HPLC,using a column packed with C_ 18 and a mixture of methanol-0.1% phosphoric acid solution(85∶15) as the mobile phase,detection wavelength is 254nm.

采用C18柱，流动相为甲醇-0.1%磷酸溶液(85∶15)，检测波长为254nm。

Chymosin was expressed in Pichia pastoris successfully, and a strong band at about 37 kD was shown by SDS-PAGE. Activity tests showed that the chymosin activity of the culture supernatant was 12.2 SU/mL.

在甲醇诱导下进行凝乳酶的表达， SDS-PAGE分析证明重组凝乳酶的分子量约为37 kD，培养基上清液中凝乳酶的活性为12.2 SU/mL。

Mono-cinnamyl maleate was prepared by esterification of maleic anhydride and cinnamyl alcohol of 1 mol:2 mol at 95 ℃ for 2～4 h.Then added isomeric catalyst and mono-cinnamyl fumarate was made by reacting at 90 ℃ for 4 h.After methanol (methanol:mono-cinnamyl fumarate = 6 mol:1 mol) was added,the mixture maintained at 90 ℃ for 4.0 h to synthesize CMF.

合成试验表明：以摩尔比为1：2的马来酸酐与肉桂醇在95 ℃醇解反应2～4 h后加入异构化催化剂，90 ℃转型反应4 h后，添加6倍摩尔质量的甲醇，在90 ℃恒温反应4 h，反丁烯二酸桂醇甲酯的合成产率较高。

Ten compounds were isolated from Cirsium henryi (collected from Zhang County, Gansu Province), structures of 7 compounds have been identified.

从采自甘肃漳县的刺苞蓟全草的甲醇提取物中，采用同样方法分离纯化得到10个化合物，鉴定了其中7个化合物的结构，未发现新化合物。

With the molar ratio of cobaltous nitrate, phenanthroline and Pyridine-3,4-dicarboxylic acid is 1∶2∶1,under the condition of pH=5,heating at 50-60℃ and stirring,the ternary complex of cobalt is synthesized in the methanol solution.

将硝酸钴、邻菲罗啉和3，4-二羧基吡啶按1∶2∶1物质的量比计量，在pH=5和50-60℃加热搅拌的条件下，在甲醇溶液中合成了钴的三元配合物，用元素分析、红外光谱、紫外光谱、热重分析和摩尔电导率对配合物进行表征，结果表明该配合物为1∶1型电解质，其组成为[CoⅢ2]NO3.H2O，其中Pydc=

A simple, selective and sensitive method was investigated for simultaneous determination of anions (SO2－4, Cl－, NO－3, F－) and cations (Na＋, NH＋4, K+, Mg2＋, Ca2＋) by single-column ion-exclusion-cation-exchange chromatography with conductometric detection. DL-malic acid-methanol-water was used as an eluent.

采用单柱离子色谱系统和电导检测的方法，首次以DL-苹果酸-甲醇水溶液为淋洗液，简便、有效地同时分离、检测了溶液中SO2-4、Cl-、NO-3、F-、Na+、NH+4、K+、Mg2+、Ca2+9种离子。

The target compounds were obtained in high yield through Michael conjugative addition of amines to methyl acrylates, cyclocondensation of the obtained diadducts in the presence of sodium methoxide,and decarboxylation of the cyclocondensation products in acid.

以胺类化合物为原料，与丙烯酸甲酯经过两次Michael加成得到N，N 二丙酸甲酯类化合物，该化合物在甲醇钠存在下进行环合，在酸性条件下脱羧，高收率得到4 哌啶酮类化合物，从而证明了这是一条合成N 取代 4 哌啶酮类化合物的普遍方法。

This method were very different from coprecipitation method by which Cu-based catalysts were normally prepared.

该方法完全不同于通常用来制备铜基甲醇合成催化剂的共沉淀法。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。