毛细管色谱法测定头孢美唑中的有机溶剂残留量

采用毛细管气相色谱法，以叔丁基甲醚为内标，用Agilent DB-200毛细管气相色谱柱和氢焰离子化检测器．同时测定了头孢美唑中甲醇、乙醇、二氯甲烷、三乙胺、乙酸乙酯、苯甲醚等6种有机溶剂残留量．6种溶剂的线性范围分别为0～480μg／mL（r=0．9996）、0—800μg／mL（r=0．9994）、0～96μg／mL（r=0．9990）、0～800μg/mL（r=0．9993）、0～800μg／mL（r=0．9995）、0～800μg／mL（r=0．9993）；平均回收率分别为100．1％、100．5％、101．2％、100．1％、100．7％和100．4％；相对标准偏差分别为0．90％、1．30％、1．18％、1．23％、1．52％、1．41％（n=9）．     

石油降解菌的分离、表征及其降油最适状态研究

从油田污泥中分离到两株能有效降解石油烃的革兰氏染色阴性,好氧细菌。x-1菌株,呈粗杆状（1．0～1．2）×（2．2～3．7μm）,两端圆,主要成连也有成对,周生鞭毛。x-3呈短粗杆状（1．0～1．3）×（1．6～3．4μm）,两端圆,成对或成短连,也有单个。经初步鉴定均为无色杆菌属（Achromobacter sp．）。研究了影响菌株降油能力的主要影响因素,并确定两种菌株的适宜降油条件,其中x-1菌株在35℃,pH7．5和油浓度5000mg／L的条件下以及x-3菌株在25℃,pH7．5和油浓度1000mg／L的条件下具有较好的石油降解能力。     

测定工业废水中铬（Ⅵ）的新方法

基于在HAc—NaAc缓冲介质中,Cr（Ⅵ）能显著催化高碘酸钾氧化罗丹明B进行褪色,同时加入十六烷基三甲基溴化铵作为增敏剂,灵敏度大大提高,建立了测定工业废水中Cr（Ⅵ）的新方法．研究了影响催化褪色反应速度的条件,在最优化条件下,Cr（Ⅵ）浓度在0．004～0．28μg／mL范围内与吸光度呈良好的线性关系,方法的检出限为3×10^-5μg／mL,对浓度为0．012μg／mL Cr（Ⅵ）标准溶液进行11次平行测定的相对标准偏差（RSD）为0．1％．该法具有灵敏度高、选择性好等特点,已用于工业废水中Cr（Ⅵ）的测定,回收率为90％～102％,结果令人满意．     

混合气中CO2的膜接触器分离过程

采用中空纤维膜接触器、溶液热再生连续循环实验装置,考察了MDEA（甲基二乙醇胺）溶液及MDEA＋AMP（2-氨基-2-甲基-1-丙醇）混合溶液吸收CO2传质过程;建立膜接触器传质模型,比较预测值与实验值。结果表明：在溶液浓度2．5mol／L,气速0．5～3．0 L／min,液速15～150mL／min时,总传质系数Kov为10～32μm／s（MDEA）,20～45μm／s（MDEA＋AMP）;模型预测值和实验值符合较好,对于MDEA溶液误差小于10％,混合溶液误差最大为19％。实验证明MDEA＋AMP混合溶液传质性能优于MDEA溶液。     

微生物絮凝剂产生菌的筛选及其絮凝性能的实验研究

从活性污泥中分离筛选出3株对高岭土悬浊液具有较好絮凝作用的絮凝剂产生菌,通过对培养基初始pH和培养时间的优化及对采油废水絮凝处理效果的研究以了解其絮凝性能．结果表明：在培养基初始pH接近中性（pH6．0-7．0）,培养时间为12～24h条件下,3种菌株对高岭土悬浊液的絮凝效果最佳,最大絮凝率达91．5％;3种菌株对采油废水具有一定的处理效果,其絮凝率为30％～40％,CODcr去除率可达40％．     

HPLC法测定人参花中绿原酸的含量

建立以高效液相色谱法测定人参花中绿原酸含量的方法．色谱柱为ODS—C18（250mm×4．6mm,5μm）,流动相为乙腈-0．5％磷酸溶液（30：70）,流速为1．0mL／min,检测波长为326nm,柱温为25℃．绿原酸在0．4～4．0μg范围内与峰面积积分值呈良好的线性关系（R=0．9991）;平均回收率为99．28％,RSD=1．46％（n=6）．本法简便、准确、重现性好、可用于人参花茶的质量控制和评价．     

HPLC法测半夏露冲剂中盐酸麻黄碱和盐酸伪麻黄碱的含量

目的：建立半夏露冲剂中麻黄碱和伪麻黄碱的含量测定方法。方法：采用HPLC法,采用ZORBAX 80A C18（15cm×4．6μm,5μm）色谱拉,流动相：甲醇-0．4％磷酸溶液（8：92）流速：1mL／min检测波长208nm。外标法计算麻黄碱和伪麻黄碱的含量。结果：盐酸麻黄碱在0．014～1．4μg范围内,盐酸伪麻黄碱在0．0655～6．550μg范围内线性关系良好,平均加样回收率盐酸麻黄碱为102．69％,RSD为1.20％;盐酸伪麻黄碱为97．92％,RSD为1．41％。结论：本法简单快速,结果准确,可以有效的控制半夏露冲剂的质量。     

分光光度法测定蒙药黑冰片中微量钛

本实验利用分光光度法对蒙药黑冰片中钛的含量进行了测定,测得标准曲线的回归方程为：A=0．00573＋0．048C（r=0．9998）．检测限为3～15μg／mL．回收率为99％～102％,RSD为0．89％（n=5）,该方法操作简单,灵敏度高,可以推广使用．     

高效液相色谱法分析聚甘油乳酸酯的组成

建立了HPLC-ELSD法测定聚甘油乳酸酯组成的方法.采用Agilent DZORBAX NH2色谱柱（4．6 mm×250 mm）,确定了最佳色谱条件：流动相为乙腈和水（体积比为90∶10）,蒸发光散射检测器（ELSD）,流速为1．2 mL/min,柱温40℃,进样量4μL .结果表明,在0．1～0．5 mg/mL范围内线性关系良好,相关系数为0．9986,在信噪比（S/N）为3时,检出限为0．020 mg/mL .回收率为98％～102％,相对标准偏差（RSD）为1．2％～1．4％.     

HPLC法测定金匮肾气丸中马钱苷、芍药苷的含量

建立一种方法用于同时测定金匮肾气丸中马钱苷、芍药苷的含量．应用高效液相色谱法测定,分离条件Symmetry C18柱（4．6min×250mm,5μm）,乙腈-1％冰醋酸溶液（14：86）为流动相,流速为1mL／min,柱温为30℃、马钱苷、芍药苷线性范围分别为0.16～1.6μg（r=0．9997）,0.18～1.8μg（r=0．9999）,平均加样回收率分别为99.13％（RSD=1．43％）,99.02％（RSD=2．17％）、方法简便,快速,可靠,为金匮肾气丸进一步研究奠定基础．     

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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