HPLC同时检测狭叶松果菊中松果菊苷和绿原酸的含量

采用反相高效液相色谱(RP-HPLC)的方法对狭叶松果菊组培苗不同部位、愈伤组织以及不同株系毛状根中的松果菊苷和绿原酸进行了含量测定,建立同时测定狭叶松果菊组织培养物中松果菊苷和绿原酸含量的高效液相色谱方法;实验采用Kromasil ODS C18柱,流动相为乙腈∶甲醇∶0.1%磷酸溶液(10∶15∶75);检测波长为330nm。结果表明松果菊苷和绿原酸在0～25μg/mL范围线性关系良好;平均回收率方面松果菊苷为97.6%(RSD=0.83%),绿原酸为98.5%(RSD=0.91%)。该法简便、准确,可作为狭叶松果菊组织培养物中松果菊苷和绿原酸的定量分析方法。     

HPLC同时检测狭叶松果菊中松果菊苷和绿原酸的含量

采用反相高效液相色谱(RP-HPLC)的方法对狭叶松果菊组培苗不同部位、愈伤组织以及不同株系毛状根中的松果菊苷和绿原酸进行了含量测定,建立同时测定狭叶松果菊组织培养物中松果菊苷和绿原酸含量的高效液相色谱方法;实验采用Kromasil ODS C18柱,流动相为乙腈∶甲醇∶0.1％磷酸溶液(10∶15∶75);检测波长为330 nm.结果表明松果菊苷和绿原酸在0～25 μg/mL范围线性关系良好;平均回收率方面松果菊苷为97.6％ (RSD=0.83％),绿原酸为98.5％(RSD=0.91％).该法简便、准确,可作为狭叶松果菊组织培养物中松果菊苷和绿原酸的定量分析方法.     

松果菊苷标准样品的研制

建立了松果菊苷标准样品的研制方法。采用柱色谱和高速逆流色谱联用对松果菊苷进行分离制备,采用质谱、紫外、红外和核磁等方法对松果菊苷进行结构表征,并进行均匀性和稳定性检验。经国内8个有资质的实验室联合定值,松果菊苷标准样品的标准值为9915%,不确定度值为066%（置信度95%）,达到国家标准样品的技术要求,可用于松果菊苷检测和相关产品的分析测试和质量控制。     

枸杞的高效液相色谱指纹图谱

采用高效液相色谱-二极管阵列检测器联用仪(HPLC-DAD)对中药枸杞的甜菜碱、类胡萝卜素提取液进行了指纹图谱研究.研究结果表明:用于枸杞质量控制的液相色谱指纹图谱对提取方法具有很强的依赖性,用枸杞甜菜碱提取液的液相色谱指纹图谱对品种进行识别效果较好,而采用类胡萝卜素提取液的液相色谱指纹图谱有利于枸杞真伪的识别和共有模式的建立;此外,还提供了甜菜碱和类胡萝卜素的紫外光谱,这为定性分析以及不同样本中峰的识别提供了一定的依据.     

不同产地龙利叶HPLC指纹图谱研究

建立了不同产地龙利叶HPLC指纹图谱,为龙利叶质量控制提供科学依据。采用高效液相色谱法,用Phenomenex(4.6 mm×250 mm,5μm)色谱柱对10批不同产地龙利叶进行分离分析,以乙腈-0.1%冰醋酸为流动相,梯度洗脱,检测波长305 nm,柱温30℃,流速1 mL/min,采用"中药色谱指纹图谱相似度评价系统"(2012.1)软件进行分析。结果表明10批不同产地龙利叶的HPLC指纹图谱共标定8个共有指纹峰,相似度均在0.9以上。该研究为建立龙利叶药材质量控制方法提供了科学依据。     

贵州产三颗针药材HPLC指纹图谱的研究

建立贵州产三颗针药材的HPLC指纹图谱.采用高效液相色谱法,色谱条件为:色谱柱:DiamonsilTM(钻石)C18(250 mm×Φ4.6 mm,5μm),乙腈-水(每100 mL中含0.34%磷酸二氢钾)为流动相,梯度洗脱,体积流量1.0 mL/min,检测波长为220 nm,柱温为25℃.该指纹图谱方法重现性较好,可作为贵州产三颗针的一项质控指标.     

沙田柚果肉提取物指纹图谱的研究

用反相高效液相色谱法建立梅州沙田柚果肉正已烷和乙酸乙酯提取物的指纹图谱．用C18硅胶柱,甲醇-水／0．1％SAc作为流动相梯度洗脱,流速0．8ml·min^-1,检测波长254nm,梯度洗脱使沙田柚果肉提取物得到了较好的分离．达到指纹图谱的技术要求．结果表明：采用HPLC指纹图谱检测技术可有效的鉴别沙田柚的种类．     

应用胶束电动色谱和模式识别技术溯源茶叶产地的研究

采用胶束电动色谱法(MEKC)建立了2类共11个中国红茶样品的色谱指纹图谱,结合模式识别技术对不同产地来源的红茶加以区分.红茶样品的处理方法:去离子水(100℃)浸取10 min.MEKC色谱条件:缓冲溶液25 mMNa2HPO4-KH2PO4-100mM SDS-0.6%甲醇(V/V)-1 mM EDTA(pH7.0...     

口炎清颗粒指纹图谱研究

 采用HPLC法构建了口炎清颗粒的指纹图谱,用Dikma PLATISIL ODS色谱柱,以乙腈-φ＝0.1%甲酸溶液为流动相,检测波长为254 nm。该指纹图谱有23个共有特征峰,确认了其中7个色谱峰的成分分别为绿原酸、咖啡酸、木犀草苷、哈巴俄苷、肉桂酸、甘草酸铵、甘草苷。构建的指纹图谱,操作简便,专属性强、重复性好,为该产品的质量监控提供了有效手段。     

红景天药材指纹图谱的研究

用高效液相色谱法建立了红景天药材的色谱指纹图谱.固定相采用ODS-C18(4.6mm×250mm×5μm)色谱柱,流动相为乙腈-0.08%磷酸水溶液梯度洗脱,检测波长为278nm,体积流量为1.0mL/min.结果表明,11个红景天样品共有10个共有峰,可作为鉴定红景天药材的主要依据.该方法简便快捷,可为红景天药材的鉴定、质量标准的建立及控制提供一定的参考.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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