戟叶酸模非石油醚部位的化学成分研究

利用硅胶柱色谱、Sephadex LH-20柱色谱等方法对酸模属植物戟叶酸模(Rumexhastatus)的非石油醚部位进行分离和纯化,根据化合物理化性质以及波谱数据分析鉴定其结构.共分离得到7个化合物,分别为1-O-阿魏酰基-β-D-吡喃葡糖苷(1)、蔗糖(2)、酸模素(3)、酸模素-8-O-β-D-葡萄糖苷(4)、反式白藜芦醇(5)、反式白藜芦醇-3-O-β-D-葡萄糖苷(6)、β-谷甾醇(7).化合物1、2首次从该植物中分离得到.     

无柄灵芝子实体的化学成分研究

研究无柄灵芝子实体的化学成分.采用硅胶柱色谱、反相硅胶柱色谱、MCI柱色谱、高效液相色谱等技术进行分离纯化,得到的化合物采用核磁共振技术等手段鉴定结构.从无柄灵芝子实体中分离得到6个化合物,它们分别为:lucidone I(1)、spiroapplanatumine L(2)、spiroapplanatumine M(3)、牛蒡苷(4)、applanatin A(5)和3-羧基吲哚(6),所有化合物均为首次从该真菌中分离得到.     

漆叶化学成分的分离鉴定

为研究漆树(Toxicodendron vernicifluum)叶中的化学成分,利用硅胶柱色谱、C18中压柱色谱、高压制备色谱对漆树叶乙醇提取物的乙酸乙酯萃取部位进行分离纯化,根据化合物的波谱数据鉴定其结构.从中分离出8个化合物,分别鉴定为：没食子酸(1)、1,3,6-O-三没食子酰葡萄糖(2)、 1,2,4,6-O-四没食子酰葡萄糖(3)、紫云英苷(4)、1,2,3,4,6-O-五没食子酰葡萄糖(5)、β-谷甾醇(6)、莽草酸(7)、黄杞苷(8).其中,化合物2、3、4、7、8是首次从该种植物中分离得到,化合物1、5、6为首次从该植物的叶中分离得到.     

钩藤的化学成分研究

目的 分离鉴定药用植物钩藤的化学成分。方法 钩藤茎枝用90%乙醇回流提取,通过硅胶柱色谱、高效液相色谱、中低压液相色谱、葡聚糖凝胶柱色谱、制备薄层色谱等多种色谱分离技术对乙醇提取物分离和纯化;采用高分辨质谱及核磁共振波谱法确定化合物结构。结果 从钩藤中分离鉴定了11个化合物,分别为高丽槐素(1)、去氢钩藤碱(2)、3,4,5,-三甲氧基苯酚(3)、喜树次碱(4)、(-)-N-甲基金雀花碱(5)、毛钩藤碱(6)、去氢毛钩藤碱(7)、缝籽嗪甲醚(8)、3α-二氢卡丹宾碱(9)、卡丹宾碱(10)和喜果苷(11)。结论 从钩藤的茎枝中分离鉴定了9个生物碱类化合物,1个黄酮类化合物和1个酚类化合物,其中化合物1,4和5首次从该属植物中分离得到,为钩藤的进一步开发利用提供参考。     

滇南风吹楠的化学成分研究

利用硅胶柱色谱、凝胶柱色谱、MCI柱色谱对滇南风吹楠70%(体积分数)丙酮提取物进行分离纯化,并通过1H NMR、13C NMR等波谱技术进行结构鉴定,从该提取物中共分离鉴定了6个化合物,包括4个木脂素和2个甾体类化合物,它们分别为dextrobursehernin(1),(2R,3S,4R)-2-(3,4-dimethoxyphenyl)-4-(4-hydroxy-3-methoxybenzyl)-3-hydroxymethyltetrahydrofuran(2),(2R,3S,4R)-4-(3,4-dimethoxy-benzyl)-2-(4-hydroxy-3-methoxyphenyl)-3-hydroxymethyltetrahydrofuran(3),4,4’-dimethylsecoisolariciresinol(4),胡萝卜苷(5)和β-谷甾醇(6).化合物1~5均数首次从该植物中分离得到.     

窄叶鲜卑花化学成分研究（Ⅰ）

用硅胶柱色谱、SephadexLH-20凝胶柱色谱等色谱技术分离纯化窄叶鲜卑花的化学成分,通过理化方法和波谱数据确定化合物结构．从窄叶鲜卑花二氯甲烷浸膏中分离并鉴定了9个化合物：香草醛（1）、甲基阿魏酸（2）、对甲氧基桂皮酸（3）、N,N′-二环己基脲（4）、Valencicacid（5）、ω-羟基-3-甲氧基-4-羟基苯乙酮（6）、异阿魏酸（7）、咖啡酸（8）及3,4-二羟基苯甲酸（9）,除化合物2、7及8外,其他化合物都为从该植物中首次报道,化合物5及6首次从蔷薇科得到,化合物4首次从植物体内得到．以上结果可为该药材的进一步研究开发提供参考．     

角果木地上部分的化学成分研究

利用溶剂提取法、正反相硅胶柱层析、Sephadex LH-20柱色谱和高效液相色谱等方法,从角果木(Ceriops tagal)地上部分分离得到7个单体化合物,并通过理化性质和波谱分析鉴定了其结构,分别为:tagalsin B(1)、tagalsin G(2)、tagalsin Q(3)、3β-lup-20(29)-ene-3,28-diol(4)、28-hydroxylup-20(29)-ene-3-one(5)、3α-hydroxy-lup-20(29)-ene-28-oic acid(6)和(S)-柚皮素(7).其中化合物7是首次从该属植物中分离得到,其余化合物均已经从该属植物中分离得到.     

密脉鹅掌柴的化学成分研究(Ⅲ)

对密脉鹅掌柴的化学成分进行研究.采用硅胶柱色谱、Sephadex LH-20柱色谱、RP-C18柱色谱等方法分离化学成分,应用 1H NMR、13C NMR、MS等方法进行结构分析,从中分离鉴定了5个化合物:megastigman-7-ene-3,4,6,9-tetraol-4-O--D-glucopyranoside(1)、山萘酚3-O--D-吡喃葡萄糖苷(2)、槲皮素-3-O--D-吡喃葡萄糖苷(3)、槲皮素-3-O--D-吡喃葡萄糖醛酸苷(4)、芦丁(5).化合物1~5均为首次从该植物中分离得到.     

南药巴戟天化学成分

为研究巴戟天药材的化学成分.通过硅胶柱色谱和ODS柱色谱等方法对其分离纯化,根据理化性质和光谱数据进行了结构鉴定.从巴戟天药材的乙醇提取物中分离得到了7个化合物,分别为1, 2-二氧乙烯蒽醌(1)、1, 3-二羟基-2-丁酰基蒽醌(2)、1, 2-二羟基蒽醌(3)、β-谷甾醇(4)、3β, 20 (R),丁基-5-烯基-胆甾醇(5)、3β, 5-烯基螺旋甾(6)、水晶兰苷(7),其中化合物1、2、5、6属于首次从该植物中分离得到.     

海南暗罗根的化学成分研究

采用硅胶柱色谱、制备薄层色谱、凝胶柱色谱和半制备高效液相色谱等方法,从海南暗罗根的乙酸乙酯部位中分离获得7个单体化合物,结构分别为:debilone(1),trans-Nferuloyltyramine (2),3,4,5-trimethoxybenzoic acid (3),p-hydroxybenzaldehyde (4),phydroxybenzoic acid(5),β-sitostenone(6),β-sitosterol(7),其中化合物11-5为首次从该植物中分离得到。     

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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