葡萄籽原花青素提取物抗氧化作用研究

为研究葡萄籽原花青素提取物（grape procyanidins extract,GPE）抗氧化和对DNA氧化损伤的保护作用,我们采用七种生物化学发光体系,检测了GPE 对O₂^-、OH、H₂O_2、ONOO^-和全血嗜中性白细胞“呼吸爆发”产生的多种活性氧的清除作用,以及对OH引起的DNA氧化损伤的保护作用;采用Fe^2＋诱发脂蛋白多不饱和脂肪酸过氧化比色体系,检测了GPE对脂质过氧化分抑制作用。结果显示,GPE 能有效地清除O₂^-、OH、H₂O_2、ONOO^-和全血嗜中性白细胞“呼吸爆发”产生的多种活性氧而抑制体系 发光,并有效抑制脂质过氧化,半抑制浓度分别约为0.2ug/ml、90ug/ml、0.5ug/ml、10ug/ml、130ug/ml、70ug/ml;25ug/ml的GPE对DNA氧化损伤的抑制率誉为70％。提示GPE 能有效清除多种自由基,保护DNA免受·OH引起的氧化损伤,嗜良好的抗氧化剂。     

玻碳电极吸附循环伏安法测定植酸含量

本文阐述一个测定植酸含量的方法。测定结果与光度法相符。测定植酸中总磷和无机磷的变异系数(n=5)分别为0.66％和0.75％;回收率分别为99.7％—100.2％和99.3％—100.8％。在选定的最佳条件下,磷浓度在0.5～50ug/ml范围内与第一氧化峰电流值呈线性,检测线低于0.5ug/ml磷。     

铜—双硫腙络合物极谱吸附波

本文用单扫描示波极谱法研究了铜一双硫腙络合物吸附波。在1.2×10~(-5)M双硫腙—0.5M NaOH—0.01M EDTA底液中,铜浓度在0.01—0.2ug/ml范围内与波高有线性关系,检出下限0.005ug/ml。大多数常见离子无干扰,Fe~(+3)的干扰可用0.01M酒石酸盐来消除。应用本体系测定人发及铝合金中微量铜,结果良好。     

顶空气相色谱法测定焦化污水中的芳香烃类

本文采用静态顶空气相色谱法对焦化污水中的芳香烃的测定条件进行了研究。不同芳烃的最低检测浓度为0.2μg/ml;变异系数平均值为3.97％;回收率为97％。     

气相色谱—质谱法测定化妆品中5种合成麝香

建立了化妆品中5种合成麝香的气相色谱—质谱联用检测技术.样品采用正己烷于40℃下超声提取20min,采用佛罗里硅土柱净化,其中柱容量为100mg/L,采用气相色谱质谱仪同时检测化妆品中5种合成麝香.5种合成麝香在0～10mg/L范围内线性关系良好,检出限为0.2～100ug/kg,空白样品在10mg/kg加标水平下回收率为94.62％～96.73％,相对偏差为1.19～2.25％.本方法简便,快捷,可同时检测化妆品中5种合成麝香成分.     

纤维蛋白原和D-Ⅱ聚体含量变化在心肌梗塞中的应用

目的 :探讨纤维蛋白原 (Fg)和D—Ⅱ聚体(D -dimer)浓度变化在心肌梗塞中的应用价值。方法 :纤维蛋白原 (Fg)定量采用CA530型血凝仪 ,D—Ⅱ聚体定量采用AU560型全自动生化仪 ,其结果与患者和对照组水平做对比分析。结果:AMI患者溶栓前Fg浓度为4.42±0.36(g/L)、D -dimer浓度2.48±0.92(ug/ml)及阳性百分率为68.6 %。溶栓期 ,Fg浓度1.32±0.18(g/L)、D -dimer浓度4.16±0.89(ug/ml)及阳性百分率为86.8% ;恢复期 ,Fg浓度2.73±0.24(g/L)、D -dimer浓度1.18±0.62(ug/ml)及阳性百分率43.3 %。各值与对照组Fg浓度2.95±0.48(g/L)、D -dimer浓度0.29±0.23(ug/ml)及阳性百分率5.0% ,有显著性差异 (P<0.01)。结论 :血浆Fg浓度和D -dimer浓度及阳性百分率水平升高是AMI发病的重要危险因素 ,与AMI的发生和发展密切相关。在溶栓治疗监测中纤维蛋白原浓度和D -Ⅱ聚体浓度及阳性百分率变化成为重要的临床生物学指标。     

火焰原子吸收法测定牙釉质中铜、锌、铁含量

本文用火焰原子吸收法测定牙釉质中铜、锌、铁含量。测定健康者26人,铜、锌、铁平均值分别为16.4±6.5ug/g,325.8±84.8ug/g,34.7±9.1ug/g;龋病患者54人,铜、锌、铁平均值分别为16.1±5.4ug/g,269.9±63.5ug/g,38.7±10.0ug/g。测定结果表明,龋病患者牙釉质中的铜略低于正常者,锌明显低于正常者,而铁略高于正常者。该方法的回收率铜为98.25～103.3％,锌为97.0～101.5％,铁为97.2～102.4％;相对标准偏差铜小于2.79％,锌小于2.60％,铁小于2.10％。     

铜电解阳极泥中火试金富集——ICP-OES测定铂和钯的研究

利用阳极泥样品经火试金富集,形成含有铂钯的合粒,合粒经王水溶解后,通过电感耦合等离子体光谱仪同时测定溶液中的铂含量和钯含量。检出限为铂:0.015ug/ml;钯:0.020ug/ml(K=3)。该方法准确度高,精密度好,操作简便,条件易掌握。     

红酵母RY-2001产类胡萝卜素的研究

研究碳源、氮源和通气量对红酵母(Rhodotorula sp．)RY-2001产类胡萝卜素的影响，并通过正交试验优化其产类胡萝卜素的培养基组成。结果表明，RY-2001产类胡萝卜素的适宜培养基：蛋白胨4％、葡萄糖2％、MgSO40．1％、酵母膏1％。摇瓶装量为50ml／250ml，28℃培养48h，在上述条件下，红酵母中类胡萝卜素含量为81．465ug/g。     

小鼠在体肺灌注制样方法体重依赖的灌注量的探讨

为探讨小鼠在体肺灌注制样方法体重依赖的最适灌注量。通过采用在体肺灌注制样并根据体重从0至0.2ml/20g探索灌注量,固定后进行切片HE染色观察固定效果。结果表明在0.2ml/20g,肺组织灌注均匀,切片后组织结构清晰,人为假象较少。可见小鼠在体肺灌注制样灌注量为0.2ml/20g可取得良好的组织固定效果。     

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     

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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