玫瑰黄链霉菌Men-myco-93-63抗生素的提取和薄层分析

玫瑰黄链霉菌Men-myco-93-63是一株对多种植物病原真菌和细菌具有很强拮抗作用的生防链霉菌,本文对该菌株在燕麦液体培养基、改良4号培养基和MM培养基中的发酵粗提抗生素进行了分析,结果表明燕麦液体培养基中菌体生长量大,萃取获得的粗提抗生素较多,是理想的发酵培养基。薄层分析表明,甲醇∶氯仿为1∶6时是抗生素的最佳层析展开剂,层析可获得7个活性组分,其中组分Ⅲ、Ⅳ、Ⅶ对马铃薯疮痂病菌具有抑菌活性。另外,组分Ⅶ还对棉花黄萎病菌有较强的抑菌活性。     

穿梅三黄散质量标准提升研究

[目的]提升穿梅三黄散的质量标准。[方法]采用显微鉴别法对制剂中大黄、黄芩、黄柏、穿心莲和乌梅进行显微特征鉴别;采用薄层色谱法（TLC）对大黄和黄柏进行定性鉴别。[结果]大黄、黄芩、黄柏、穿心莲和乌梅显微特征明显;大黄TLC准确度、重现性良好,黄柏TLC效果不佳。[结论]该鉴别方法简便,重复性佳,可用于穿梅三黄散的质量标准提升。     

Separation of liquefied product of Salix psammophila by column chromatography and structure analysis of its components

The liquefied product of Salix psammophila wood was separated by thin-layer chromatography (TLC) and column chro-matography, and its structure was identified by nuclear magnetic resonance (NMR) spectra in our study. The separation result indi-cates that the sample of liquefied S. psammophila contained at least two categories of components. The structure of the main compo-nents was guaiacyl C-1, C-2 of the hydroxyphenyl propane, i.e., the aromatic nucleus protons of lignin. Degradation and polycon-densation reactions occurred when the S. psammophila wood was liquefied in phenol. Polycondensation reactions occurred among the depolymerization products from cellulose, the aromatic depolymerization products from lignin and the products of the displace-ment reactions between phenoxide ion and cellulose.     

薄层扫描法测定"猪痢停"合剂中小檗碱含量

采用薄层扫描法测定“猪痢停”合剂中小檗碱含量。其线性范围为０１６４μｇ～１４７６μｇ,平均回收率１０２４％,ＲＳＤ３２２％（ｎ＝６）。该法简便,结果准确,重现性好,可作为本品的质量控制标准。     

厚朴散与香薷散TLC鉴别中展开系统的改进研究

为了研究厚朴散和香薷散现行质量标准中含苯展开剂的替代方法,分别以三氯甲烷-乙酸乙酯(10∶1)和环己烷-乙酸乙酯-异丙醇-甲醇-水-三乙胺(3∶3.5∶1∶1.5∶0.5∶1)为展开剂,开展对厚朴散中厚朴和香薷散中黄连的薄层色谱鉴别试验。结果表明,经改进后的薄层色谱方法斑点清晰,分离效果良好,专属性强,可避免毒性试剂苯对检验人员及环境的危害。     

脱氧雪腐镰刀菌烯醇(DON)理化检测方法的研究

比较了检测饲料中脱氧雪腐镰刀菌烯醇(DON)的3种方法:薄层层析法(TLC)、高效液相色谱分析(HPLC)、气相色谱-质谱联用(GC-MS),建立了TLC的定性检测及HPLC的定量检测相结合的方法。同时通过反复试验,结合HPLC检测,确定了以展开剂氯仿:甲醇(90∶10)展开DON毒素的R f值约为0.45。     

Study on the TLC Identification of Effective Components in the Sihuangzhili Granules

In order to establish and perfect the quality standard of Sihuangzhili granules, this experiment was conducted to identify coptidis rhizome, cortex phellodendri, rhubarb, scutellaria baicalensis, and radix isatidis in Sihuangzhili granules. We used TLC identification method to investigate the factors such as the developing agent, the expansion temperature, the expansion of the humidity, the source of the thin layer, the batch number and the color developing conditions.In the experiment, the mixture of cyclohexane, ethyl acetate, isopropyl alcohol, methanol, water, and triethylamine (3∶3.5∶1∶1.5∶0.5∶1) as the developing agent, was put into the expansion cylinder with the pre-saturated ammonia vapor, and was used to identify coptidis rhizome and cortex phellodendri under the UV lamp(365 nm);The mixture of ethyl acetate, butanone, formic acid and water (5∶3∶1∶1) as developing agent, sprayed with 2% ethanol solution of ferric chloride, was used to identify scutellaria baicalensis;At last, n-butanol, acetic acid, and water (19∶5∶5) as developing agent, dried and sprayed with indene ketone solution, heated at 105 ℃, was used to identify radix isatidis. The test results showed that under the test condition, the target spot was clear, with no tail, and the experiments were specifically suited in this test with strong specificity and good reproducibility.     

消食平胃散中厚朴薄层鉴别方法研究

消食平胃散是《中华人民共和国兽药典》二部（以下简称《中国兽药典》）收载的成方制剂。通过对方中厚朴的薄层鉴别方法的研究,认为《中国兽药典》2005年版消食平胃散中厚朴的鉴别方法有值得商榷之处,改用《中国兽药典》2005年版厚朴药材中的鉴别方法更为可行。     

大黄末中没食子酸的鉴别及含量测定方法研究

为了完善大黄末的质量控制方法,对大黄末中没食子酸的薄层鉴别和含量测定方法分别进行了研究。采用薄层色谱法鉴别没食子酸以及高效液相色谱法测定其含量。选用Agilent Eclipse XDB-C18(250 mm×4.6 mm,5μm)为色谱柱,甲醇-0.05%磷酸溶液(5∶95)为流动相,流速1.0 m L/min,检测波长为271 nm。试验结果没食子酸在1.064~106.4μg/m L浓度范围内,线性关系良好(r=1.0000);平均回收率(n=6)为97.84%(RSD=0.61%)。薄层色谱斑点清晰,分离度好。本方法准确灵敏,可用于大黄末中没食子酸的质量控制。     

L-鼠李糖的制备及检测方法研究进展

L-鼠李糖作为一种微量糖广泛分布于植物中，是食品加工中常用的甜味剂之一，还可用于生产香精香料。研究发现，L-鼠李糖还可以诱导酵母甘露聚糖提高在动物机体中a-甘露糖苷酶的活性，显示出良好的药用价值。一方面介绍了L-鼠李糖的制备方法及应用的研究情况，另一方面根据L-鼠李糖的化学性质及测定原理，结合近年来L-鼠李糖含量检测研究领域中的最新研究成果，综述了L-鼠李糖的检测方法，并重点从薄层色谱发（TLC）、高效液相色谱法（HPLC）及二硝基水杨酸法（DNS）等几方面介绍L-鼠李糖的定性、定量检测方法，并对各种检测方法的优缺点进行了比较。