药茴香全草化学成分研究

从药茴香全草首次分离得到１０个结晶性化合物,经理化和光谱分析鉴定为γ－谷甾醇「Ⅰ」。十六烷酸「Ⅱ」,十八烷酸「Ⅲ」,氧化前胡内酯「Ⅳ」,东莨菪内酯「Ⅴ」,富马酸「Ⅵ」,没食子酸惭酯「Ⅶ」,山奈酚「Ⅷ」,槲皮素「Ⅸ」及蔗糖「Ⅹ」。其中化合物Ⅰ与Ⅴ－「Ⅸ」为首次从该属植物中获得。     

天然产物岩白菜内酯化学结构的二维NMR研究

岩白菜内酯（ｂｅｒｇｅｎｉｎ）为二氢异香豆素化合物,存在于虎耳草科植物岩白菜Ｂｅｒｇｅｎｉａｐｕｒｐｕｒａｓｃｅｎｓ（Ｈｏｏｋ．ｆ．ｅｔＴｈｏｍｓ．）ｅｎｇｌ．等植物,有止咳抗炎活性［１］．虽然已有一些有关岩白菜内酯类化合物的化学结构报道［２,３］,甚至还经有机全合成证实［４］,但岩白菜内酯的核磁波谱研究一直未有文献报道,且其立体结构也有待于进一步确证．最近发现岩白菜内酯及其衍生物还具有抗病毒活性［５］和抗爱滋病病毒功能［６］,并成为芳基δ－内酯的一种便利的模型化合物［７］,由此引起科学家的再度…     

湖州铁线莲化学成分研究

利用硅胶、ODS、Sephadex LH-20等色谱方法从湖州铁线莲Clematis huchouensis Tamura中分离得到9个化合物,根据理化性质和光谱数据,分别鉴定为正三十一烷醇（Ⅰ）、正二十五烷醇（Ⅱ）、正二十四烷酸（Ⅲ）、β-谷甾醇葡萄糖苷（Ⅳ）、β-豆甾醇葡萄糖苷（Ⅴ）、木犀草素（Ⅵ）、芹菜素（Ⅶ）、liriodendrin（Ⅷ）和芦丁（Ⅸ）.首次报道了湖州铁线莲植物中化学成分的研究,其中化合物Ⅰ和Ⅱ首次从铁线莲属植物中分离得到.     

石椒草化学成分的研究（Ⅲ）

从云南省玉溪地区产草本植物石椒草的全草中乙醚提取部分分离出五个化合物,根据它们的理化常数和光谱分析,分别确定为二十八烷醇(octacosanol)(Ⅰ),三十四烷(tetratriacontane)(Ⅱ),三十一烷(hentriacontane)(Ⅲ),石椒草内酯A(shijiaocaolactone A)(Ⅳ),另一化合物结构待定.化合物(Ⅳ)为首次得到的新化合物.     

长毛香科科脂溶性成分研究

对黔产长毛香科科(Teucrium pilosum(Pamp.)CY Wu et S.Chow)的化学成分进行研究,从乙醇提取物乙酸乙酯部份分离得到六个化舍物,经理化常数和波谱分析鉴定为:正十七烷(Ⅰ),正十六烷酸(Ⅱ),正十八烷酸乙二醇单酯(Ⅲ),正十六烷酸乙二醇二酯(Ⅳ),正二十四烷酸乙二醇单酯(Ⅴ),正二十五烷酸α-单甘油酯(Ⅵ).化合物Ⅰ～Ⅵ均是首次从该植物中分离得到.     

西域旌节花化学成分研究

利用反复硅胶柱层析进行分离和纯化，从文山西域旌节花乙醇提取物乙酸乙酯部分分离得到五个化合物，通过理化方法及光谱分析鉴定为：三十酸（tricontanoic acid Ⅰ)，三十酸甲酯(methyl tricontanoateⅡ)，正二十六烷(hexacosaneⅢ)．正二十九烷(nonacosaneⅣ)，正三十醇(triacontanolⅤ)。所有化合物均系首次从该种植物分到。     

大花旋覆花中的新倍半萜内酯

从大花旋覆花（ＩｎｕｌａｂｒｉｔａｎｎｉｃａＬ．ｖａｒ．ｃｈｉｎｅｎｓｉｓ）中分离得到了３个新倍半萜内酯化合物，应用波谱技术和化学方法确定了其结构。其中二乙酰基大花旋覆花内酯（１，６—Ｏ，Ｏ—ｄｉａｃｅｔｙｌｂｒｉｔａｎｎｉｌａｃｔｏｎｅ）显示有细胞毒活性。同时，从该植物中还得到了蒲公英醇、蒲公英醇乙酸酯、胡萝卜甙、肉豆蔻酸、棕榈酸和硬脂酸甘油酯。     

太白红芪化学成分研究

从中药太白红芪ＨｅｄｙｓａｒｕｍＴａｉｐｅｉｃｕｍ（Ｈａｎｄ．－Ｍａｚｚ．）Ｋ．Ｔ．Ｆｕ根中首次分得九种单体，经理化、ＩＲ、ＵＶ、ＵＭＲ、ＭＳ、衍生物制备等手段确定其中六种物质分别为：（Ⅰ）β－谷甾醇，（Ⅱ）二十六酸，（Ⅲ）木蜡酸，（Ⅳ）醋酸二十六酯，（Ⅴ）蔗糖，（Ⅵ）ｌ－３－羟基－９－甲氧基紫檀烷，（Ⅶ）因量少未鉴定，（Ⅷ）与（Ⅸ）的结构待鉴定     

一种新内酯化合物的合成研究

<正> 内酯化合物在药物和香料等精细有机化工产品中是常见的。本文采用苯醌(Ⅰ)为原料与醋酸酐反应得到1,2,4一苯三酚三乙酸酯(Ⅱ),(Ⅱ)经硫酸二甲酯反应生成1,2,4一三甲氧基苯(Ⅲ),(Ⅲ)与邻苯二甲酸酐起傅氏反应制得酮酸化合物(Ⅳ),后者与格氏剂甲基溴化镁反应,即得新内酯化合物(Ⅴ)。     

民族药骚羊古化学成分的研究

用硅胶柱色谱等方法,从贵州省民族药骚羊古(PimoinellacandolleanaWeightetArn )全草中分离出5个化合物,根据化合物的一维、二维核磁共振波谱等解析,分别鉴定为三十二烷(Ⅰ)、β-谷甾醇(Ⅱ)、豆甾醇(Ⅲ)、熊果酸(Ⅳ)和1-羟基-2,3,5-三甲氧基酮(Ⅴ),化合物Ⅰ～Ⅴ均首次从该植物中分得。此外,还对化合物Ⅴ的核磁共振二维谱进行了解析,确定的各个1H和13C的归宿。     

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.     

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     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

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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