超临界CO2配合萃取中药广霍香中的重金属

以二乙基二硫代氨基甲酸钠(NaDDTC)为配合剂,用超临界CO2配合萃取法降低中药广霍香中的重金属含量,并用正交试验法对萃取压力、温度、配合剂用量等因素进行了优化．结果表明：对Cu,Pb和Zn的萃取存在最佳争件,即萃取压力为25MPa,萃取温度为70℃,配合剂用量(质量分数)为15．79％;在此条件下Cu,Pb和Zn的去除率分别为55．2％,59．2％和53．3％．该法为降低中药中重金属元素的含量提供了新途径．     

川芎中药配方颗粒中咖啡酸的HPLC-ECD测定

建立测定川芎中药配方颗拉中咖啡酸的高效液相色谱电化学分析法,并用该方法测定2种不同批号的川芎中药配方颗拉。采用反相高效液相色谱电化学检测法,以Zorbax SB-C18（150mm×4．6mm,5．0m）为色谱柱;甲醇-4％醋酸为流动相,梯度洗脱,流速为1．0mL．min-1：检测电压为0．7V,柱温为30℃。结果：咖啡酸浓度在2．4-8．4μg·mL^-1（r=0．9997）范围内线性关系良好,平均加样回收率（n=6）为98．9％（RSD=2．1％）。该法是一种快速,灵敏,准确的分析方法,可以为川芎中药配方颗拉的质量控制提供科学依据。     

微波消化法在微量元素测定中的应用

探讨了一种快捷有效的样品预处理方法，即采用聚四氟乙烯高压罐微波消化法处理样品。通过正交试验分析得到较优的消化条件，并在此条件下做锌、铁、锰的添加回收试验，回收率分别为９７．０５％、９４．３％、９０．６％，相对标准偏差分别为１．２％、４．１％、３．４％。另外，还做了扩展试验，与国标法对照的试验。通过试验和比较，证实该消化方法具有安全、省时、方便等优点     

针灸配合中药熏洗治疗体育专业学生髌腱腱病疗效观察

目的探讨针灸配合中药熏洗治疗髌腱腱病的疗效。方法39例髌腱腱病患者随机分为治疗组与对照组,其中治疗组20例,采用针灸配合中药熏洗治疗,对照组19例予超短波治疗,比较两种治法的疗效。结果治疗组痊愈率为65．0％,总显效率为90．0％;对照组痊愈率为21．1％,总显效率为52．6％;治疗组疗效明显优于对照组,两组比较差异有统计学意义（P〈0．01）。结论针灸配合中药熏洗治疗髌腱腱病疗效确切、优于单纯超短波治疗。     

不同修复方法对猪肝脏免疫组化结果的影响

目的：比较不同修复方法对猪肝脏HBsAg/HBcAg免疫组化结果的影响。方法：选取15例血清HBV阳性猪肝脏组织,分别予以不修复、单纯加热高压修复和柠檬酸加热高压修复,进行免疫组化,分别检测结果。结果：免疫组化结果,不修复组阳性2例（13.3％）,单纯加热高压组阳性9例（60％）,柠檬酸加热高压组阳性12例（80％）。各组间差异有统计学意义（P〈0．01）,修复组与不修复组差异有统计学意义（P〈0．01）,单纯修复组和柠檬酸修复组差异无统计学意义（p〉0．05）。结论：应用抗原修复能使猪肝脏HBsAg/HBcAg抗原得到较好暴露,且只需简单的加热高压即可。     

氢化物发生-原子荧光法测定菊花和大云中的铅

应用AFS—2202a型双道原子荧光分光光度计和断续流动的氢化物发生技术，采用HNO3-H2O2酸性体系和高压釜消解样品，对样品中的铅含量进行了测定。同时，研究了光电管负高压、灯电流、屏蔽气和载气流量、载流的选择、酸度等对实验的影响。在选定实验条件下，铅的检出限为0．08μg／L，标准物质桃叶(GBW08501)的验证结果与推荐值一致，相对标准偏差为1．9％。该方法简便、快速、灵敏，对于实际中药样品的测定得到了满意的结果。     

正交试验法提取黄芪甲甙的工艺研究

目的 研究芪归花宁心冲剂的最佳提取工艺。方法 以黄芪甲甙质量分数为指标,采用正交试验法考查提取溶媒、溶媒浓度、剂量、提取时间等因素对黄芪甲甙提取效率的影响。结果 黄芪的最佳提取工艺条件为：用60％乙醇提取3次,每次提取液为中药生药的5,4,3倍,每次提取时间为2,1．5,1．5h最好。结论 用正交试验法能检测出黄芪的最佳提取工艺条件。     

速率法、丙酮酸氧化酶法与微板赖氏法检测ALT的对比试验

目的：为血站筛查ALT选择较准确可靠的试验方法提供试验依据．方法：由内蒙古通辽市中心血站提供的63份ALT含量不同的血浆标本进行速率法（简称S法）、丙酮酸氧化酶法（简称B法）与微板赖氏法（简称L法）比较．结果：L法、S法、B法的中值定值血清（接近血站的判断标准）,板内变异系数依次为7．03％、3．98％、2．47％;L法、S法、B法的中值定值血清板间变异系数依次为7．86％、5．75％、5．50％．结论：微板丙酮酸氧化酶法可以作为血站筛查ALT的方法．     

苦茶Camellia assamica var.kucha Chang et Wang的嘌呤 …

用重量法和柱层析法从苦茶Ｃａｍｅｌｌｉａ ａｓｓａｍｉｃａ ｖａｒ．ｋｕｃｈａ Ｃｈａｎｇ ｅｔ Ｗａｎｇ的嫩梢中分离出３种嘌呤生物碱,经薄层层析、熔点测定、元素分析、核磁共振和质谱等对其结构的测定,鉴定为咖啡碱、１,３,７,９－四甲基尿酸和可可碱,其百分含量分别为０．８８％,０．８４％和０．２９％。样品水提物经氢仿萃取后直接由高压液相色谱分析,测得苦茶含咖啡碱１．９３２９％,四甲基尿酸１．２９４     

悬浮液进样-火焰原子吸收光谱法测定饲料中的微量元素

以邻苯二甲酸二丁酯-琼脂溶液为悬浮液，建立了悬浮液进样-火焰原子吸收光谱法快速测定饲料中微量元素铁、锌、铜的方法．回收率为96．5％-102．2％，测定结果与灰化法一致．     

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     

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

正~~     

Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has