甲基纤维素膜固载肌红蛋白的电化学和电催化

用甲基纤维素(MC)将肌红蛋白(Mb)固载于热裂解石墨电极表面，制备了Mb-MC膜修饰电极．修饰膜中的Mb与电极直接传递电子，在磷酸盐缓冲溶液(PBS)中循环伏安扫描可得到一对可逆的Mb辅基血红素Fe(Ⅲ)／Fe(Ⅱ)电对氧化还原峰，式电势为-0．298V(vs SCE)．式电势随PBS的pH值增加而负移且成线性关系，说明Mb的电子传递过程伴随有质子的转移，最后探讨了该修饰电极对O2，H2O2和NO的电催化性质。     

甲基纤维素膜固载血红蛋白的直接电化学

用甲基纤维素(MC)将血红蛋白(Hb)固载于热裂解石墨电极表面,制备了Hb-MC膜修饰电极．包埋在MC中的Hb与电极直接传递电子,在pH7．0的磷酸盐缓冲溶液中得到1对可逆的血红蛋白辅基血红素Fe(Ⅲ)／Fe(Ⅱ)电对氧化还原峰,式电势为-0．312V(vs SCE),其式电势随溶液pH值增加而负移且成线性关系,直线斜率为-41．0mV／pH,说明Hb的电子传递过程伴随有质子的转移．研究了Hb-MC膜修饰电极对O2,H2O2和NO的电催化性质。     

壳聚糖-Nafion固载氯化血红素在水性介质中的电催化性能

采用壳聚糖（Cs）水溶胶体系,借助Nafion,将氯化血红素（Hm）修饰在金电极上,构建Cs—Hm-Nation／Au电极．在0．02MPBS（PH7．2）缓冲溶液中,通过循环伏安扫描,可以直接检测到Hm的氧化还原峰,还原峰电流与扫速的平方根成正比．考察了修饰电极对H2O2的催化还原及对H2O2氧化对苯二胺（PPDA）反应体系的催化作用．结果表明：Cs—Hm—Nation／Au电极可以催化H2O2的还原,电极的催化电流与H2O2浓度在一定范围呈线性响应．对H2O2-PPDA体系,Cs—Hm-Nation／Au电极可以检测到可逆的氧化还原峰,表明修饰电极可以实现PPDA被H2O2的可逆氧化,Hm起到了过氧化氢模拟酶的作用．     

辣根过氧化物酶在钛酸纳米管修饰玻碳电极上的直接电化学研究

采用循环伏安法研究证明了辣根过氧化物酶在钛酸纳米管修饰玻碳电极上的直接电化学.结果显示:在磷酸缓冲溶液中,辣根过氧化物酶在钛酸纳米管修饰的玻碳电极上呈现出一对良好的氧化还原峰.紫外-可见光谱数据表明,在钛酸纳米管存在的条件下,辣根过氧化物酶的构象基本保持不变,说明钛酸纳米管对辣根过氧化物酶具有良好的生物相容性.此外,电化学结果表明,该修饰电极能够有效地催化双氧水的还原.     

CuO催化剂的熔融盐法制备及其性能

以CuSO_4·5H_2O为铜源,利用熔融盐法、在不同温度下合成了CuO无机催化材料。采用粉末X射线衍射(XRD)、紫外-可见漫反射光谱、傅里叶变换红外光谱(FT-IR)对其结构及性能方面进行表征,通过CuO催化剂对甲基橙的降解程度,评价了其紫外光催化活性。通过引入各种自由基清除剂研究甲基橙在紫外光催化反应过程中的活性物种。研究结果表明,温度在410℃合成出的CuO材料具有最好的紫外催化活性。     

肌红蛋白在水/有机混合溶液中的电化学和电催化特性

用海藻酸钠（Sodium Alginate，SA）将肌红蛋白（Mb）固定在热裂解石墨电极表面，制备了Mb．SA膜修饰电极．包埋在SA膜中的Mb在磷酸盐缓冲溶液（PBS）和乙醇混合溶液中与电极直接传递电子，得到一对对称的Mb辅基血红素Fe（Ⅲ）／Fe（Ⅱ）电对的氧化还原峰，式电势为-0．339V（vs SCE）．式电势随PBSpH值增加而负移且成线性关系，直线斜率为-47．0mV／pH，说明肌红蛋白的电子传递过程伴随有质子的转移．并研究了Mb-SA膜修饰电极在PBS和乙醇混合溶液中催化还原H2O2和催化六氯乙烷脱氯，该修饰电极可用于H2O2和六氯乙烷的定量检测．     

双核钴(Ⅱ)配合物的合成、表征和性种

合成了八齿配体1,1,4,7,7-五(2'-苯并咪唑甲基)-二乙基三胺(DTPB)及其双核钴配合物[Co2(DTPB)(NO3)2](NO3)2·2H2O,通过元素分析、摩尔电导、紫外一可见光谱、红外光谱和循环伏安对其进行了表征,并且测试了配合物催化邻苯二酚的活性.     

双核钴(II)配合物的合成、表征和性质

合成了八齿配体1,1,4,7,7-五(2′—苯并咪唑甲基)—二乙基三胺(DTPB)及其双核钴配合物[Co2(DTPB)(NO3)2](NO3)2.2H2O,通过元素分析、摩尔电导、紫外-可见光谱、红外光谱和循环伏安对其进行了表征,并且测试了配合物催化邻苯二酚的活性.     

多金属氧酸盐/中性红纳米复合膜的制备、表征和应用

采用层接层自组装方法(LbL),将多金属氧酸盐H3PMo12O40·2H2O,(PMo12)和中性红(NR)制备成纳米复合膜PMo12/NR,并通过紫外可见光谱,红外光谱和X-射线光电子能谱对复合膜进行表征.研究表明:UV光处理前后的复合膜,紫外可见光谱和红外光谱没有发生显著的变化.红外光谱显示:在UV光处理后来形成M...     

磷钼酸修饰Pd电极上H2O2电催化还原反应

通过循环伏安扫描法制备了磷钼酸修饰的Pd电极,考察了该电极对H2O2电还原的催化性能.研究发现,磷钼酸在Pd电极上发生了吸附,经修饰的Pd电极的催化性能明显高于未修饰Pd电极.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

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-