反相高效液相色谱测定血液中三硝基甲苯及其代谢产物含量

采用已建立的最佳水解条件，即血样加盐酸加热水解，再用NaOH中和，乙醚萃取TNT及两种代谢产物4A和2A，用反相高效液相色谱方法，流动相为甲醇、水，梯度淋洗，色谱柱为C18，一次进样同时测定了样品中TNT、4A和2A含量，回收率分别达到了95．88％，92．54％，98．23％，表明改进的梯度法准确度很高。     

聚丙烯复合抗氧剂的高效液相色谱测定

本文采用高效液相色谱法对某牌号聚丙烯所添加的复合抗氧剂的主要成分抗氧剂3114和抗氧剂626进行快速定性、定量分析。在线性范围内,抗氧剂3114和抗氧剂626的质量浓度与色谱峰面积均呈良好的线性关系,相关系数r分别为0.9997和0.9999,检出限分别为5×10-4mg/mL和1×10-3mg/mL。     

红外光谱法测定聚丙烯中乙烯含量

根据Basell公司提供的聚丙烯标样,用红外光谱仪测定了聚丙烯中乙烯含量。选择近红外谱区的吸收作为聚丙烯测定参数。使用峰面积法计算吸光度。对于不同乙烯含量范围的样品,选择不同的乙烯测定参数。     

狼尾珍珠菜花挥发油的提取与成分分析

本作对辽宁千山地区狼尾珍珠菜花中挥发油进行提取，分析和鉴定，测得此花挥发油含量为３．７％，用ＧＣ／ＭＳ法从其挥发油中分离确定了１４种化合物，用峰面积归一法通过Ｇ１７０ＢＡ化学工作站数据处理系统得出其化学成分在挥发油中的百分含量为６７．４５％。     

基于峭度的组分分析方法解析重叠峰

基于峭度的组分分析方法用来解析重叠峰．其优点是半盲源分离，即只要确定出重叠峰所含组分的数目，就能从混合波谱中分离出纯组分谱．采用CABK来解析模拟两组分重叠峰体系和酒样的GC-MS混合谱，得到了令人满意的结果．     

狼尾珍珠菜花挥发油的提取与成分分析

本文作者对辽宁千山地区狼尾珍珠菜花中挥发油进行提取，分析和鉴定。测得此花挥发油含量为 ３．７％。用 ＧＣ／ＭＳ法从其挥发油中分离确定了 １４种化合物。用峰面积归一法通过Ｇ１７０１ＢＡ化学工作站数据处理系统得出其化学成分在挥发油中的百分含量为６７．４５％。     

基于热分级法的双向拉伸聚丙烯专用料制样条件的优化

采用连续自成核退火法(SSA)热分级方法对双向拉伸聚丙烯专用料的分子链结构进行研究.设计用连续自成核退火热分级方法评价双向拉伸聚丙烯成模稳定性的实验方法,通过对双向拉伸聚丙烯专用料的制样过程进行分析,确定最适宜的制样条件.结果表明:最适宜的制样条件为样品在200℃条件下用压板压制,可以消除不同产地铝坩埚的影响,成模稳定性显著提高.     

EDXRF分析中粉末压片制样条件及X光管激发条件研究

研究了EDXRF分析中粉末压片法最优制样条件和光管最佳激发条件。通过对BaSO4粉末与BaSO4和煤粉混合的两种不同Ba含量(58.8%和35.3%)的压片样品测量,得到Ba元素特征谱线的峰背比与制样条件、激发条件之间的关系曲线。在实验所用的具体设备情况下,粉末压片法制样最优压力大小为5~6MPa,最优恒压时间约为4min。在光管电压为47kV,光管电流为10μA时,得到Ba元素特征谱线最佳峰背比和良好的能量分辨率,并且发现同一目标元素含量不同的样品,最优制样条件和X射线管激发条件基本相同。研究结果表明适当的制样方法和优化的激发条件对提高EDXRF分析结果的准确性和改善仪器检出限具有重要的意义。     

洋葱中挥发性成分的气相色谱-质谱法测定

目的：研究洋葱中挥发性化学成分．方法：采用微波辅助提取液，用气相色谱-质谱法联用技术进行定性分析，按峰面积归一化法，求出挥发性化学成分的相对含量．结果：分离出44个峰，鉴定了28个化合物．结论：主要成分是酸类、甾醇类，烷烃，醛和杂环化合物，其中酸类、烷烃含量较高．     

毛木耳多糖的分析研究

用云南产市售的毛木耳子实体经提取纯化后得到的纯毛木耳多糖精品（简称ＰＡＡ）,采用聚丙烯栈胺凝胶电泳法检验其纯度,已符合定性定量分析标准。以ＵＶ法测定了２６０ｎｍ和２８０ｎｍ无特征吸收峰,经ＣＨＮ元素分析仪测定不含氮。说明ＰＡＡ中无核酸及蛋白质。ＩＲ扫描有特征多糖吸收峰;分子量测定约为１２万,总含糖量为６１．２９％,糖醛 酸含量为１５．２４％将ＰＡＡ经水解后用硅胶Ｇ薄层层析和气相色谱分析,其单糖组成     

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