霸王鞭化学成分研究

采用硅胶柱色谱及HPLC等分离方法对新鲜霸王鞭的乙酸乙酯提取物进行分离纯化,得到8个单体化合物,通过1H NMR和13C NMR的方式鉴出其结构分别为蒲公英赛醇(1),大戟醇(2),木栓酮(3),乙酰表木栓醇(4),西米杜鹃醇(5),α-菠甾醇(6),山柰酚-3-O-α-L-鼠李糖甙(7),槲皮素-3-O-α-L-鼠李糖甙(8)。化合物4,5,7,8为首次从霸王鞭中分离得到。     

马六甲蒲桃的化学成分

为从马六甲蒲桃果实中寻找化学成分,利用正反相硅胶柱色谱、凝胶柱色谱等技术对马六甲蒲桃果实的乙醇提取物进行分离纯化,通过1H-NMR和13C-NMR等波谱技术结合文献数据对照进行化合物结构鉴定。共分离鉴定了17个化合物,分别为山奈酚3-O-β-D-吡喃葡萄糖（1）、山奈酚-3-O-α-L-鼠李糖（2）、异鼠李素（3）、异鼠李素-3-O-α-L-鼠李糖（4）、槲皮素-3-O-α-L-鼠李糖（5）、槲皮素-3-O-β-D-吡喃葡萄糖（6）、槲皮素-3-O-β-D-吡喃木糖（7）、杨梅素-4’-甲醚-3-O-α-L-鼠李糖（8）、6,8-二甲基乔松素（9）、乔松素-7-O-β-D-吡喃葡萄糖（10）、 stercurensin(11)、根皮苷（12）、3-甲氧基鞣花酸-3′-O-α-L-吡喃鼠李糖（13）,4,5-二羟基-6-甲基-α-吡喃酮（14）、5,7-二羟基-2-甲基色原酮（15）、反式肉桂酸（16）和苹果酸二甲酯（17）。其中化合物11～10为黄酮,11和12为查尔酮,其中,化合物4、6、14、15和17首次从蒲桃属植物中分离得到,1、4、5、6、9、10、1133～17首次从马六甲...     

牛角瓜根化学成分的研究

从牛角瓜(Calotropis gigantea)根的乙醇粗提物中分离出9个化合物,通过质谱(MS)、核磁共振谱(NMR)等分析方法,鉴定了它们的结构.分别为洋地黄毒甙元-3-O-β-D-葡萄糖甙(1)、洋地黄毒甙元-3-O-α-L-鼠李糖甙(2)、坎诺甙元-3-O-β-D-葡萄糖甙(3)、坎诺甙元-3-O-α-L-鼠李糖甙(4)、齐墩果烷-12-烯(5)、羽扇豆醇(6)、奈皮菌素(7)、3α,11α-二羟基-20(29)-羽扇豆烷-28-酸甲酯(8)和熊果酸(9),其中,化合物1～4为强心苷类化合物,5～9为三萜或甾体类化合物,化合物1～3,5为首次从该植物中分离得到.     

油茶枯中两个多酚化合物的提取分离及其抗炎活性研究

为深入研究油茶中的多酚化合物及其药理活性,以油茶枯为原料,经石油醚脱脂、乙醇提取、2次中低压制备色谱制备得到2个多酚化合物山奈酚-3-O-[2-O-β-D-半乳糖-6-O-α-L-鼠李糖]-β-D-葡萄糖苷(1)和山奈酚-3-O-[2-O-β-D-木糖-6-O-α-L-鼠李糖]-β-D-葡萄糖(2),并采用MTT法检测多酚化合物对巨噬细胞RAW264.7的毒性作用;利用脂多糖LPS刺激巨噬细胞RAW264.7建立炎症模型,采用ELISA试剂盒测定油茶多酚1,2及混合物3的抗炎活性。结果表明,多酚化合物1、2及其混合物3对小鼠巨噬细胞RAW264.7毒性不大,且均能抑制TNF-α、NO、i NOS的表达释放,表现出良好的抗炎活性,在药物研究与开发上具有良好发展前景。     

升麻根茎的化学成分研究

用层析方法从升麻(Cimicifuga foetida)的根茎中分离得到7个化合物.通过波谱分析,分别鉴定为:升麻醇(1);25-O-乙酰基升麻醇(2);升麻醇-3-O-β-D-木糖甙(3);12β-羟基升麻醇-3-O-β-D-木糖甙(4);25-O-乙酰基升麻醇-3-O-β-D-木糖甙(5);升麻醇-3-O-α-L-...     

绵萆薢化学成分研究(Ⅱ)

采用现代分离技术对绵萆薢的化学成分进行了分离纯化,并用波谱技术鉴定其结构.结果从该植物提取物中分离得到8个化合物,分别为:对羟基苯乙酮(1)、4-(对羟基苯基)-2-丁酮(2)、肉桂酸(3)、对羟基苯乙醇(4)、苯酚(5)、1-β-D-呋喃核糖基-1H-1,2,4-三氮唑(6)、薯蓣皂苷元-3-O-[α-L-吡喃鼠李糖(1→2)]-[α-L-吡喃鼠李糖(1→4)]-β-D-吡喃葡萄糖(7)、薯蓣皂苷元-3-O-[α-L-吡喃鼠李糖(1→2)]-β-D-吡喃葡萄糖(8).其中化合物1～6为首次从该植物分离得到,且化合物1、4、5、6是首次从该属植物中分离得到.     

川续断皂苷乙的化学结构与波谱特征

川续断皂苷乙[Dipsacoside B,3-O-α-L-吡喃鼠李糖(1→2)-α-L-吡喃阿拉伯糖基-28-O-β-D-吡喃葡萄糖-(1→6)-β-D-吡喃葡萄糖苷基-常春藤皂苷]进行了1H和13C NMR检测,补充和纠正了文献1H NMR数据,明确区分该化合物13个羟基的归属,通过DEPT、1H-1H COSY、HSQC、HMBC等1D,2D NMR技术对该化合物所有的1H和13C NMR信号进行了全归属和详细解析,确定了化学结构与波谱特征.     

RP-HPLC法测定罗汉果叶中总黄酮含量

用反相高效液相色谱法(HPLC)测定罗汉果(Momordica grosvenori)叶中总黄酮的含量,用保留时间定性,用外标法定量。结果表明,罗汉果叶含有黄酮甙元槲皮素和山奈酚,槲皮素线性回归方程为y=179033．73x 6958.30,r=0.9951;山奈酚线性回归方程为y=176444．32x 10827．99,r=0．9944。罗汉果叶中总黄酮含量为1．618％。     

高效液相色谱法测定葛枣弥猴桃叶中黄酮苷A的含量

采用高效液相色谱法测定了葛枣猕猴桃叶中一种黄酮苷类成分--山奈酚-3-O-α-L-鼠李糖基-(1→3)-α-L-鼠李糖基-(1→6)-β-D-吡喃半乳糖苷(黄酮苷A)的含量.用十八烷基硅烷键合硅胶做填充剂,甲醇-1%乙酸(乙酸体积分数为0.1%)做流动相,检测波长为267nm.结果表明:线性范围为0.099～9.99μg;平均回收率为102.3%;相对标准偏差为1.5%.     

藜中黄酮类的化学成分

采用正、 反相硅胶和葡聚糖凝胶柱色谱技术对藜（Chenopodium album L.）的黄酮类化学成分进行分离和纯化, 得到4个黄酮类化合物, 分别
为槲皮素3-O-芸香糖苷(1)、 芹菜素6,8-二-C-β-D-葡萄糖苷(2)、 槲皮素3-O-［α-L-鼠李糖（1→4）-α-L-鼠李糖（1→6）-β-D-葡萄糖］(3)、 异鼠李素3-O-［α-L-鼠李糖（1→4）-α-L-鼠李糖（1→6）-β-D-葡萄糖］(4). 其中化合物2、3、4为首次从该属植物中分离得到.     

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     

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