东北红豆杉紫杉醇的提取纯化与HPLC检测

对东北红豆杉中紫杉醇的提纯与检测技术进行了研究，确立了固相萃取、液．液萃取、正己烷沉淀、硅胶柱层析分离、4℃、V（甲醇）：V（水）=3：1相中冷却放置48h的紫杉醇提取纯化技术，经高效液相色谱法检测，产品纯度达93％以上．     

柠檬酸甘油单、二棕榈酸酯的薄层色谱分析

以硅胶Ｇ＋１％羧甲基纤维素钠（ＣＭＣ）＋０．６mol/L硼酸为色谱条件,采用均匀设计法选择最佳的溶剂系统来分离柠檬酸甘油单、二棕榈酸酯。结果表明,当溶剂的组成及比为三氯甲烷：丙酮：乙酸＝８５：１５：１时分离较为理想,与柠檬酸甘油单、二棕榈酸酯电喷雾质谱（ＥＳＩ－ＭＳ）分析得到的组分基本相一致。     

吉林大豆中卵磷脂的成分提取与分析

对大豆中卵磷脂的提取方法做了系统的研究。采用混合溶剂（V正己烷：V乙醇＝6：4）作为大豆中油提取溶剂的方法,出油率可达17．6％－20．8％,与文献上报道的16．8％有明显提高,大豆中的卵磷脂得到有效的分离提纯。详细研究了薄层色谱法中不同极性的展开溶剂的影响,采用V氯仿：V甲醇：V水＝65：22．5：4（pH=4.0)做展开溶剂,经显色后,对薄层色谱板做光密度扫描。结果表明,可对大豆中的磷脂酰胆碱（PC）和磷脂酰乙醇铵（PE）进行有效的分离。该方法用于11种吉林大豆中卵磷脂的成分分析,取得了满意的结果。     

家庭用食品及炊事用品清洗剂配方

一、铝制品洗净剂磷酸0.3配方1（重量％）:蒸馏水47.2羟基醋酸（乙醇酸）7配方2（用于禽、畜肉类,重量％）:氟化扶2蔗糖酯8表面活性剂3脱水山梨醇脂肪酸酯5水88丙h醇8配制方法:先将乙醇酸、氟化铝溶于水中,另外用少磷酸一钠3量水将表面活性剂溶解,两者混合均匀即可。磷酸H钠3配方2（重量％）:蒸馏水73硫酸铝15～20四、水果、蔬菜洗净剂磷酸三钢85～80配方（重量％）:H、厨房油污清洗剂蔗糖酯8配方1（重量％）:dL一苹果酸钠15特3号轻油94.4醋酸16乙H醇单乙醚2.0天然物20异丙醇3.0蒸馏水41二乙醇胺0.5五、餐具洗净剂掳拍酸h辛酯0.05配方1（…     

相转移催化合成蔗糖酯：（Ⅲ）蔗糖棕榈酸酯的合成

在合成蔗糖棕榈酸酯中采用相转移催化的基本原理和方法．考察了反应时间、反应温度、原料的不同配比和催化剂用量对蔗糖棕榈酸酯重量产率的影响．得出反应时间为３ｈ，反应温度为８５～９０℃，原料棕榈酸甲酯和蔗糖的摩尔配比为１．０：２．５，催化剂用量为棕榈酸甲酯摩尔数的０．０８～０．１０时，其蔗糖棕榈酸酯产率是８８．３０％．产物经纯化后测定，所含蔗糖棕榈酸单酯与棕榈酸甲酯分子比为０．７７４０：１．００００。     

尾巨桉木材苯／醇提取物成分的气相色谱／质谱分析

采用混合溶剂萃取法从新鲜尾巨桉木材中提取低分子量成分，并用气槽色谱／质谱法联机分析技术，用色谱峰面积归一化法计算各组分的相对含量。共分离出42个峰，并从中鉴定出30个化合物，占总峰面积的87．88％。主要成分为1，2-邻苯二甲酸二异辛酯（17．53％）、1，2-邻苯二甲酸双（2-甲丙基）酯（cas）（8．48％）、二丁基酞酸盐（8．12％）、丁二酸-甲基-双（1-甲丙基）酯（7．02％）、乙二酸双（2-甲丙基）酯（cas）（6．89％）、2，6，10，15，19，23．六甲基-鲨烯（4．53％）、十六酸乙酯（cas）（3．77％）、2-异丙基-1-甲烷基萘（2．97％）、二十六烷（2．63％）、己二酸双（2-乙己基）酯（1．98％）、二十八烷（1．93％）、鹿尾草碱（1．90％）等。     

SO4^2-/TiO2-Al2O3催化均四甲苯氧化副产物与异辛醇反应

以均四甲苯氧化反应副产物预处理后得到的混合酸和异辛醇为原料，在固体超强酸SO4^2-/TiO2-Al2O3，作用下进行合成混合酯的研究。考察了催化剂用量、异辛醇与混合酸的质量比、反应时间等因素对酯化反应的影响，确定了较佳的反应工艺条件：m（催化剂）：m（异辛醇）：m（混合酸）=0．01：3．18：1，反应时间为3h，在此反应条件下预处理后的混合酸转化率可达到99．9％。     

蔬菜中多种有机氯和拟除虫菊酯农药残留的同时分析方法

运用组合固相萃取（Solid phase extraction，SPE）柱净化、GC-ECD检测建立了6种有机氯和6种拟除虫菊酯农药残留的气相色谱同时分析方法．用乙酸乙酯作溶剂、高速均质和超声波方法辅助萃取样品中的农药残留，萃取液浓缩并转溶于丙酮-正己烷混合溶液（2：8，v／v）中，经过组合SPE柱（由上到下为CARB、SCX、bE）净化，乙酸乙酯定容．选用青花菜进行加标回收率实验，回收率为60％-120％，方法检测限为0．01μg/Kg-0．1μg／Kg．     

马齿苋化学成分研究

利用硅胶柱色谱和HPLC对马齿苋全草的正已烷萃取物进行分离纯化,经理化性质和波谱数据分析进行结构鉴定,得到6个单体化合物,分别鉴定为：β-谷甾醇（1）、亚油酸三甘油酯（2）、黑麦草素（3）、正二十六烷醇（4）、α－棕榈酸单甘油酯（5）、β-谷甾醇葡萄糖苷（6）。其中化合物3为首次从该植物中分离得到。     

2-(9-蒽基)-2-羟基乙酸及其衍生物的外消旋体拆分

以键合有β-环糊精的硅胶为手性固定相，对2-(9-蒽基)-2-羟基乙酸及其3种衍生物2-(9-蒽基)-2-甲氧基乙酸、2-(9-蒽基)-2-羟基乙酸乙酯和2-(9-蒽基)-2-甲氧基乙酸乙酯的外消旋体进行薄层色谱分离．结果表明，当以环己烷／丙酮／甲醇(V：V=3：2：1)为展开剂时，两种酸的相对比移值分别为8．47和12．57；以甲苯／氯仿／丙酮(V：V=5：2：1)溶剂系统作为展开剂时，两种酯的相对比移值分别为9．25和20．81．     

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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