白藜芦醇诱导人T淋巴瘤Jurkat细胞凋亡的研究

用荧光染色、透射电镜、Wright-Giemsa染色方法检测人T淋巴瘤Jurkat细胞在白藜芦醇（resveratrol，Res）诱导凋亡时的形态学变化情况，并用流式细胞仪对其进行定量分析，Westblot检测部分凋亡信号分子分泌的变化情况．发现白藜芦醇能明显诱导该细胞凋亡，显现出典型的凋亡现象，且凋亡有明显的药物依赖性．流式细胞仪检测发现，各药物处理组（0．125，0．25，0．5，1．0，2．0μL／mL）的凋亡率（3．01％，8．93％，17．97％，22．45％，32．88％）和对照组的凋亡百分率（0．91%）比较有显著性差异．West Blot检测则发现，Ras降低了bcl-xl，bax的表达，以至不能进一步产生bcl-2／bax和bcl-2／bcl-xL二聚体来抑制细胞凋亡，即减除了这些凋亡抑制因子对细胞凋亡的抑制，从而使细胞顺利进入caspase介导的凋亡途径．     

KMnO4-HCHO化学发光反应体系测定白藜芦醇

在酸性介质中,高锰酸钾氧化白藜芦醇产生微弱的化学发光,甲醛对此体系有增敏作用,据此建立了一种化学发光测定白藜芦醇的新体系．在优化的实验条件下,白藜芦醇的浓度在0．005～1．000μg／mL范围内与发光强度呈良好的线性关系,方法的检测限为1．0ng/mL．对浓度为0．1μg／nL的白藜芦醇连续进样11次,其RSD：0．76％．将本方法用于红葡萄酒中自藜芦醇的测定并做同收率实验,回收率为81％～116％．同时,在基于化学发光和紫外的基础上,对可能的机理进行了探讨．     

天然产物白藜芦醇的合成

以大茴香醇为原料，经溴代，Arbuzov重排反应，得到中间体对甲氧基苄基磷酸酯，再与3，5-二甲氧基苯甲醛经过Wittig—Horner缩合反应及脱甲基化反应合成反武产物白藜芦醇,反应中间体和目标化合物用IR，MS和^1HNMR进行了结构表征．本合成路线反应步骤少，原料价廉易得．     

均匀设计法优选虎杖白藜芦醇的提取工艺

目的优选超声波法提取虎杖中白藜芦醇的最佳工艺。方法本研究以虎杖中白藜芦醇的提取量和吸光度值为考察指标,通过均匀设计法实验研究4个因素对提取效果的影响。结果实验得到从虎杖中提取白藜芦醇的最佳工艺为：100％乙醇-丙酮（1：1）,料液比为（1：25）,pH=6,浸泡时间24h,超声温度为30℃,提取时间为30min,平均2次提取,提取率为0．390％。结论该实验确定的最佳提取工艺简便易行。     

单纯形法优化花生根中白藜芦醇的微波提取工艺

采用微波提取与分子荧光分析技术．探索正交试验与改进单纯形试验设计相结合优化花生根中白藜芦醇的微波提取工艺．通过L9（3^4）正交试验考察料液比、微波功率、乙醇溶剂浓度以及微波提取时间等因素对白藜芦醇提取效果的影响．再采用改进单纯形试验进一步优化提取工艺．研究表明：结合正交试验与改进单纯形法提取花生根中白藜芦醇的最佳工艺条件为料液比1：15（g·mL^-1）,微波功率中高火,微波时间5min,乙醇浓度68％．在最佳工艺条件下白藜芦醇的平均提取率为0．1515％,与单纯采用正交试验最优提取条件相比白藜芦醇的提取率提高了24．30％,有效地实现了花生根中白藜芦醇的最佳提取效果．     

超声波辅助提取虎杖中白藜芦醇工艺研究

目的优选超声波辅助提取虎杖中白藜芦醇的最佳工艺。方法通过L16（4^5）正交实验研究5个因素不同水平对虎杖中白藜芦醇提取率的影响,采用紫外-可见分光光度法进行检测。结果经过正交实验得到从虎杖中提取白藜芦醇的最佳工艺为：以80％的CH3CH2OH＋CH3COCH3（体积比1：1）为提取剂,料液比1：10,pH=6,在30℃超声辅助提取50min,重复提取两次,虎杖中提取白藜芦醇的提取率可以达到1．83％。结论该实验确定的最佳提取工艺稳定性好且简便易行,且白藜芦醇的提取率高于有关报道。     

花生中白藜芦醇提取条件

花生中含有功能性成分白藜芦醇,对其提取条件的探究报道较少。通过条件实验,研究了用同一溶剂的不同浓度在不同温度下对花生中白藜芦醇进行提取,结果表明：在75℃下,乙醇浓度为80％时,浸提3次（2h／次）,提取效果最佳;通过回收率实验,表明实验方法可靠、准确。     

气相色谱法测定发酵食品中的游离乳酸

采用气相色谱法单独对发酵方法生产的食品中含有的游离乳酸进行了测定研究，用ＦＩＤ检测器检测。方法的平均标准差为０．０８２－１．８１，变异系数为２．６％－６．２％，平均回收率为９８．１％－１０２．２％。     

苹果中克菌丹残留量分析方法研究

目的 为清除苹果中残留农药，确立苹果中克菌丹残留量的毛细管气相色谱分析方法。方法 苹果样本用丙酮及二氯甲烷提取后，再萃取到石油醚中，经硅胶柱净化后采用气相色谱法测定。结果 该方法最低检出浓度为0．006mg／kg，添加回收率分别为：全果95．3％～105．9％；果皮99．0％～104．5%；果肉98．2％～104．3％；土壤101．0％～103．8％。结论 方法简便、快速、准确，各项指标均符合残留分析的要求。     

地表水中痕量丙烯腈气相色谱分析

本文采用常温氮气吹脱后用Ｐｏｒａｐａｋ Ｎ捕集管捕食的方法，富集水体中痕量丙烯腈，然后用载气反吹进样的隔离层本方法检出限为０．００５ｍｇ／Ｌ，回收率为１０３．７％￣９８．２％，变异系数为４．３２％￣２．３６％（含量为０．０１２￣０．４５６ｍｇ／Ｌ）。     

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