东北苍耳子化学成分研究

本文采用无水乙醇浸泡提取制得浸膏,再将浸膏加水混悬后依次用石油醚、乙酸乙酯和正丁醇萃取,制得各种提取物。用柱层析、高效液相色谱等进行分离,得到两种单体化合物,经1HNMR鉴定并与文献对照,确定一种为xanthinosin,另一种为β—谷甾醇。     

白藓化学成分研究

采用无水乙醇浸泡提取制得浸膏,再将浸膏加水混悬后依次用石油醚、乙酸乙酯和正丁醇萃取,制得几种提取物。用柱层析、高效液相色谱等进行分离,得到3种单体化合物,经^1H NMR、^13C NMR确定化合物的结构为β-谷甾醇、叶绿素和秽酬。     

日本东北红豆杉枝化学成分研究

采用甲醇浸泡提取制得浸膏,再将浸膏加饱和食盐水溶解后依次用正己烷萃取除去油脂,再用二氯甲烷萃取浓缩萃取物。用柱层析、重结晶和高效液相色谱等进行分离,得到两种单体化合物,经1H-NMR,13C-NMR和IR鉴定并与文献对照,确定一种为紫杉吉酚,另一种为紫杉平F。     

还阳参化学成分研究

研究还阳参的化学成分。采用无水乙醇浸泡提取制得浸膏,再将浸膏加水混悬后依次用石油醚、乙酸乙酯和正丁醇萃取,制得各层提取物。用柱层析、高效液相色谱等分离方法进行分离,得到5种单体化合物,经^1HNMR、^13CNMR确定单体化合物为叶绿素、蒲公英甾醇乙酸酯、葡萄糖、伪蒲公英甾醇乙酸酯、萨谷甾醇葡萄糖苷。     

苍耳子提取物的GC/MS分析

本文采用乙醇浸泡提取制得浸膏,再将浸膏加水混悬后依次用石油醚、乙酸乙酯和正丁醇萃取,制得各种提取物。其中石油醚层提取物占总量的50%以上,采用GC/MS对石油醚层进行分析,其主要成分为:亚麻酸乙酯,硬脂酸,正十九烷,亚麻酸甲酯,棕榈酸。     

嘉祥白菊花中黄酮类化合物的分离纯化和结构鉴定

研究了嘉祥白菊花中黄酮类化合物的提取分离和结构鉴定.采用超声波提取法进行提取总黄酮,制得黄酮浸膏.样品经大孔树脂柱、硅胶柱分离,然后用TLC进行鉴定合并.最后经过减压蒸馏、冷冻干燥和多次重结晶后制得一种纯品,并通过红外和核磁等手段,对该纯品进行表征.     

镇咳新药左羟丙哌嗪的合成

左羟丙哌嗪作为一种国内尚未进口和生产的药物，对其合成工艺的研究，可为工业生产该种药物打下基本的技术基础。该工艺用苯胺、二乙醇胺在酸性条件下，对220℃左右环合制得苯基哌嗪；环氧氯丙烷用10%的硫酸开环成3-氯-1，2-丙二醇；然后将这两种中间体在乙醇溶液中回流，制得消旋体羟哌丙嗪，再用酒后酸拆分制得左羟哌丙嗪。通过该方法可以制得产品，总收率达9.5%。并通过结构鉴定，确证其为左羟丙哌嗪。     

化学法制造高脱色力活性炭的研究

<正>本试验研究了一种化学活化剂,对松炭的活化过程有较好的促进作用。正交试验结果表明,松炭用一种化学药剂的溶液处理时,对制得活性炭的脱色力有特别显著的影响。松炭用化学药剂溶液处理制得的活性炭的脱色焦糖溶液的透光率为96.5％,对0.15％亚甲基蓝溶液的脱色力为22ml/0.1g炭。     

益母草颗粒实验室的制备工艺及质量控制

介绍实验室制备益母草颗粒的常用方法，通过实际操作，优选出各种药用辅料的用量比例，即在益母草浸膏与糊精和甜味剂质量比为1：2．5：1时，制得的益母草颗粒质量最好。     

胆木浸膏片的抗炎作用研究

为研究胆木浸膏片的消炎功效 ,用毛细血管通透性、耳肿胀、跖肿胀、慢性肉芽肿、解热等方法对胆木浸膏片进行了药理研究 ,结果表明 :胆木浸膏片对冰醋酸所致的小鼠腹部毛细血管通透性增加和二甲苯所致的小鼠耳肿胀具有非常显著的抑制作用 ,并显著抑制大鼠蛋清性足跖肿胀形成和棉球性慢性肉芽组织增生 ,对伤寒Vi多糖菌苗所致的家兔双高峰体温升高有解热作用 .提示胆木浸膏片是一种多环节作用的抗炎药 .     

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