苦豆子茎秆中生物碱类化学成分研究

为研究新疆苦豆子茎秆中生物碱类化学成分。采用酸水提取法提取苦豆子茎秆中的生物碱,采用多种柱层析、重结晶方法分离纯化,运用化合物的理化性质和光谱数据进行化合物的结构鉴定。结果显示,从苦豆子茎秆中共分离得到5个生物碱,分别鉴定为槐啶碱(1)、槐果碱(2)、槐胺碱(3)、黄华碱(4)和左旋-O-乙酰基膺靛叶碱(5)。本研究中的化合物5为首次从本植物中分离得到。     

蒙药肉豆蔻-5的化学成分研究

采用硅胶柱层析法、Sephadex LH-20柱层析法、反相硅胶柱层析法进行分离,用质谱法、核磁共振氢谱、核磁共振碳谱法鉴定其化合物结构,从蒙药肉豆蔻-5(肉豆蔻、木香、土木香、广枣、荜茇)中分离得到8个单体化合物,分别为:异土木香内酯(1)、1,13-二氢异土木香内酯(2)、木香烯内酯(3)、土木香内酯(4)、Santamarine(5)、β-谷甾醇(6)、十二酸乙酯(7)、十八烷酸(8),其中化合物1-5为首次从肉豆蔻-5中分离得到,为阐释蒙药肉豆蔻-5药效物质奠定了基础.     

内蒙古苦豆子Sophoraalopecuroides生物碱成分及分离研究

用薄层扫描法测定了内蒙古苦豆子中主要生物碱的含量，真空液相层析法分离总碱得八种结晶。其中七种已知生物碱。通过熔点、薄层定性、红外、核磁等理化分析比较确认为槐果碱、苦参碱、槐定碱、槐胺碱、氧化苦参碱、金雀花碱和Ｎ－甲基金雀花碱。晶（１）经ＩＲ，￣１ＨＮＭＲ及ＭＳ谱表征，初步认为是槐定碱的Ｎ－氧化物，是首次从国产苦豆子植物分离得到．     

蒙药森登-4有效部位化学成分分离与鉴定(Ⅱ)

采用硅胶柱层析法、Sephadex LH-20柱层析法进行分离与纯化,通过理化性质及波谱分析技术(1 H-NMR、13 C-NMR)鉴定化合物的结构,从蒙药森登-4有效部位中分离、鉴定出7个单体化合物,分别为:西红花苷-3(1)、没食子酸(2)、齐墩果酸(3)、胡萝卜苷(4)、棕榈酸(5)、β-谷甾醇(6)、豆甾醇(7).其中化合物1、3、4和5为首次从森登-4中分离得到,为阐释蒙药森登-4药效物质奠定了基础.     

蒙药述达格-4的化学成分研究

采用硅胶柱色谱法、Sephadex LH-20柱层析法、反相硅胶柱色谱法进行分离,用质谱法、核磁共振氢谱、核磁共振碳谱法鉴定其化合物结构,从蒙药述达格-4(高良姜、紫硇砂、木香、石菖蒲)中分离得到7个单体化合物,分别为:为β-谷甾醇(1)、高良姜素(2)、山奈素-4′甲醚(3)、二氢高良姜醇(4)、苯甲酸(5)、香草酸(6)、二十烷(7),二十烷为首次从该复方药材中分离得到.鉴定的7个化合物均为首次从述达格-4有效部位中分离得到,为阐释蒙药述达格-4药效物质奠定了基础.     

金银花化学成分分析

研究了忍冬科(Caprifoliaceae)金银花(Lonicera JaponicaThunb)的化学成分.采用大孔吸附树脂、Sepha-dex LH-20柱和硅胶柱层析法,对金银花水提物中的化学成分进行分离纯化,并根据其理化性质和光谱数据进行结构鉴定.分离出8个化合物,分别鉴定为:原儿茶酸(Ⅰ)、咖啡酸(Ⅱ)、阿魏酸(Ⅲ)、绿原酸(Ⅳ)、2(E)-3-乙氧基丙烯酸(Ⅴ)、三十五醇(Ⅵ)、二十五醇(Ⅶ)、2-(2-丙烯氧基)-乙醛(Ⅷ),其中,化合物Ⅰ、Ⅲ、Ⅴ、Ⅵ、Ⅶ、Ⅷ均为首次从金银花中分离得到.     

新疆不同产地苦豆子种子中生物碱含量测定与分析

采用高效液相色谱法（HPLC）来测定新疆不同产地苦豆子种子中6种生物碱（金雀花碱、氧化苦参碱、N-甲基野靛碱、烟碱、槐定碱、苦参碱）的含量，并运用SPSS 22.0和SIMCA-P 14.1分析软件对不同产地样品中生物碱成分含量进行聚类分析和主成分分析。结果显示，不同产地苦豆子中金雀花碱、氧化苦参碱、槐定碱的含量存在差异，北疆产地的苦豆子种子中金雀花碱和槐定碱的含量普遍高于南疆。以上结果表明，所建HPLC法精密度、稳定性、准确度良好，可为完善苦豆子的质量控制标准提供参考。聚类分析和主成分分析方法可为苦豆子药材的道地性评估提供依据。     

地衣中酚酸类化合物研究

利用反复硅胶柱层析法、Sephadex LH-20、制备薄层层析法（PTLC）和重结晶等技术手段分离指状珊瑚枝地衣（Stereocaulon paschaleHoffm.）的化学成分.通过理化常数测定和光谱分析鉴定其化学结构,从指状珊瑚枝地衣的乙酸乙酯部位分离并鉴定3个酚类化合物,分别为赤星衣酸乙酯（uthyl haematommate,Ⅰ）、β-苔黑酚酸甲酯（methyl-βorcinolcarboxylate,Ⅱ）、赤星衣酸（haematommate acid,Ⅲ）.化合物Ⅰ~Ⅲ均为首次从指状珊瑚枝地衣中分离得到.     

金银花化学成分的研究

为了研究用简单的方法从金银花中分离化合物,采用选择性萃取法从金银花浸膏的乙酸乙酯萃取部位分离得到化合物Ⅰ,然后经过硅胶柱层析分离得到化合物Ⅱ、Ⅲ、Ⅳ。通过理化方法和MS、IR、H-NMR、C-NMR等谱学技术对分离得到的4种化合物进行结构鉴定,分别鉴定为3’,4’,5’,5,7-五甲氧基黄酮(Ⅰ)、木犀草素(Ⅱ)、槲皮素(Ⅲ)、绿原酸(Ⅳ)。其中化合物Ⅰ为首次从该属植物中发现,并且是经过选择性萃取分离得到的。该方法简单快捷,较之柱色谱法有较大优势。     

苗药苦皮藤的化学成分研究

目的:研究苗药苦皮藤石油醚部位化学成分。方法:采用硅胶柱色谱和重结晶进行分离纯化,根据波谱数据结合文献鉴定其结构。结果:从苦皮藤根石油醚部位中分离鉴定得到6个化合物：13,14-dihydroxy-8,11,13-podocarpatrien-7-one(1)、β-香树脂醇(2)、9(11),12-dieneoleana-3β-ol(3)、Friedelin(4)、4-二甲基庚二酸(5)、正十六烷酸(6)。结论:从苦皮藤石油醚部位中分离得到6个化合物,包括4个萜类、2个脂肪酸,其中化合物1-6为首次苦皮藤中获得。     

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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