用Nafion膜固定的N—甲基吩嗪为介体的过氧化氢生物传…

用Ｎａｆｉｏｎ膜固定的Ｎ－甲基吩嗪为辣根过氧化物酶和玻碳电极之间的电子传递介体，成功地研制了成了电流型过氧化氢生物传感器，探讨了ｐＨ值，温度，工作电位和抗坏血酸等干扰物质对此生物传感器电催化还原Ｈ２Ｏ２的影响。此生物传感器选择性好，灵敏度高，对Ｈ２Ｏ２线性响应范围为０．６μｍｏｌ／Ｌ－２．５ｍｍｏｌ／Ｌ，响应时间少于３０ｓ。     

用Nafion膜固定的N-甲基吩嗪为介体的过氧化氢生物传感器

用Ｎａｆｉｏｎ膜固定的Ｎ－甲基吩嗪为辣根过氧化物酶和玻碳电极之间的电子传递介体，成功地研制成了电流型过氧化氢生物传感器．探讨了ｐＨ值、温度、工作电位和抗坏血酸等干扰物质对此生物传感器电催化还原Ｈ２Ｏ２的影响．此生物传感器选择性好、灵敏度高，对Ｈ２Ｏ２线性响应范围为０．６μｍｏｌ／Ｌ～２．５ｍｍｏｌ／Ｌ，响应时间少于３０ｓ     

还原氧化石墨烯/聚亚甲基蓝复合物修饰电极用于丙烯酰胺检测（英文）

丙烯酰胺作为食品热加工处理的产物，具有生殖毒性、神经毒性和致癌性。文章应用电化学工作站的三电极体系，通过同时进行氧化石墨烯的电化学还原和亚甲基蓝的氧化，在玻碳电极表面合成了还原氧化石墨烯/聚亚甲基蓝（RGO/PMB）复合物，构建了用于丙烯酰胺灵敏检测的电化学传感器。在最优的实验条件下，该传感器对丙烯酰胺的检测限可达1.67×10^-9mol/L，检测范围为5×10^-9mol/L～2.5×10^-5 mol/L。实验结果表明该传感器具有良好的选择性、稳定性和重现性，并且可用于实际薯片样品中丙烯酰胺含量的测定。     

聚甲基蓝/乙炔黑修饰玻碳电极用于测定对乙酰氨基酚

用甲基蓝和乙炔黑纳米材料修饰玻碳电极制备了对乙酰氨基酚传感器.用循环伏安法研究了对乙酰氨基酚在该传感器上的电化学行为.结果表明:该传感器对于对乙酰氨基酚的氧化还原具有良好的电催化性能.相对于裸玻碳电极传感器,对乙酰氨基酚在甲基蓝和乙炔黑纳米材料修饰玻碳电极的传感器上的氧化峰的峰电流显著提高.利用差分脉冲伏安法进行分析测试,对乙酰氨基酚在2.0~400#mol/L浓度范围内与其氧化峰的峰电流呈良好的线性关系,线性相关系数为0.992.信噪比为3时对乙酰氨基酚检出限为0.6#mol/L.用于对乙酰氨基酚药片检测,回收率99.3%~103%.     

基于细菌脱氢酶活性法的水质综合毒性快速测定仪

在无氧条件下,生物染料亚甲基蓝可以作为生物新陈代谢过程中体内脱氢酶催化反应的电子受体,亚甲基蓝与细菌悬液共存时,其退色速度标志着细菌脱氢酶活性的大小。脱氢酶的活性大小在一定程度上能够反映出微生物新代谢的能力,微生物所处的水环境中毒物的存在会引起微生物脱氢酶活性变化,毒物的毒性与脱氢酶的活性相关。本文以动力学比色法测定亚甲基蓝的退色速度为基础设计并制造了一台水质综合毒性相关。本文以动力学比色法测定亚     

桃核直接作为生物吸附材料对水中亚甲基蓝的吸附研究

采用桃核作为生物吸附剂,对模拟废水中的亚甲基蓝进行吸附研究。考察了吸附剂粒径、吸附时间、吸附剂投加量、p H、染料初始浓度、温度等因素对亚甲基蓝的吸附影响;并通过吸附等温线、吸附动力学和热力学研究来探讨吸附机理。结果表明,当亚甲基蓝初始质量浓度为100 mg/L、溶液初始p H6、粒径为60目的桃核用量为7 g/L、于60℃的恒温振荡器中振荡吸附反应10 h后,吸附率可达98.78%。桃核对水溶液中亚甲基蓝的吸附是一个自发的吸附过程,其吸附行为均符合二级反应速率方程和Langmuir、Freundlich吸附等温式。经计算得出桃核对亚甲基蓝的饱和吸附量为22.08 mg/g。桃核是一种很有前景的染料废水处理生物材料。     

钴镍铁氧体-生物炭的制备及对亚甲基蓝的吸附

探索废弃生物质制备磁性生物炭的方法并研究其对亚甲基蓝的吸附性能.以果树残枝为原料,采用水热法制备了一种新型磁性钴镍铁氧体-生物炭复合材料,结合扫描电镜、X-射线衍射、比表面测试、红外光谱分析和磁滞回线等手段对制备的磁性钴镍铁氧体-生物炭和生物炭进行形貌、物相、结构和磁性特性表征分析;对比考察2种材料对亚甲基蓝的吸附行为...     

改性橘皮对亚甲基蓝废水的脱色研究

以生物废弃物橘皮为原料,经NaOH处理得改性橘皮吸附剂,用于处理亚甲基蓝模拟废水,考察橘皮用量、温度、pH和吸附时间对亚甲基蓝脱色效果的影响。结果表明:在改性橘皮用量为1.0 g/L,温度为40℃,pH为7,吸附时间为140 min的条件下,改性橘皮对亚甲基蓝的脱色效果最优,脱色率为87.3%,最大吸附量达到87.3 mg/g。改性橘皮对亚甲基蓝的吸附符合Langergren准二级动力学模型。     

固载葡萄糖氧化酶的壳聚糖/二氧化硅杂化膜的制备及表征

利用生物相容性良好的天然高分子聚合物壳聚糖(CS)与甲基三甲氧基硅烷(MTOS)通过原位溶胶-凝胶法制备壳聚糖/二氧化硅有机无机杂化复合膜,用此膜对葡萄糖氧化酶进行固定,用红外光谱法、扫描电镜法对膜进行了表征.以电沉积普鲁士蓝的玻碳电极和固定化酶膜构建葡萄糖生物传感器,用循环伏安法和记时电流法对固定化酶的效果进行了评价,结果表明,用于研制固定化酶生物传感器时,杂化膜比单纯的壳聚糖膜对底物的响应时间快并能很好地保持酶的活性.     

亚甲基蓝—酸处理粘土悬浮体系的可见光谱

研究亚甲基蓝在经过不同浓度Ｈ２ＳＯ４溶液处理的粘土水悬浮液中的可见光谱变化规律这种变化规律充分反映了酸处理条件对粘土表面和结构的影响。     

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