β—环糊精构筑模拟葡萄糖氧化酶的研究

采用β－环糊精（β－ＣＤ）二间羟基苯磺酸酯同三氯化铁形成的配合物构筑模拟葡萄糖氧化酶，与过氧化氢形成酶－底复合物，将葡萄糖催化氧化生成葡萄糖酸，研究了模拟酶浓度、葡萄糖浓度及温度对模拟酶催化反应的影响。     

二苯甲酰甲烷席夫碱过渡金属配合物的制备及仿酶催化活性研究

利用溶液法合成二苯甲酰甲烷席夫碱过渡金属配合物,用紫外、红外、热重分析方法对目标产物进行结构表征与确认,以过氧化氢残余率为指标,分析催化剂种类、催化剂与过氧化氢配比、反应温度、溶液酸度对催化反应的影响,研究该配合物作为模拟过氧化氢酶,对过氧化氢分解的催化性能。结果确定出配合物仿酶催化剂催化分解过氧化氢反应的最佳条件为:二苯甲酰甲烷缩苯丙氨酸席夫碱镍配合物催化性能最好,当其浓度为1.0×10-5mol/L时,控制过氧化氢浓度为0.05mol/L,温度55℃,溶液的pH值为8。配合物仿酶催化剂催化分解过氧化氢反应符合一级反应特征。     

壳聚糖固定化木瓜蛋白酶的制备及性质

以壳聚糖为载体，戊二醛为交联剂制备固定化木瓜蛋白酶，研究了固定化时间、温度、pH值、给酶量和戊二醛浓度对固定化木瓜蛋白酶活力的影响，结果表明：木瓜蛋白酶最佳经条件是给酶量为每克载体10mg，戊二醛浓度0.5%，pH7.5，室温下（25℃）反应10h。所制备的固定化木瓜蛋白酶的最适pH8.0，最适温度70℃，与溶液酶相比，固定化酶的热稳定性显著提高。     

鲢鱼副产物蛋白酶解条件的优化

本文以鲢鱼副产物中蛋白质为酶解底物,采用三因素二次旋转正交回归设计,研究水解反应中酶—底物浓度比（[E]/[S]）、pH、温度（T）三个因素对蛋白质回收率的影响,得出最优水解条件为：[E]/[S]=3。33%、PH=8。54、T=58℃,蛋白回收率〉75%。     

对"过氧化氢碘化钾催化分解"催化概念的质疑

在过氧化氢中加入碘化钾溶液，过氧化氢的分解速率显著加快．国内外文献普遍认为这是碘化钾在起催化剂作用．我们发现反应过程中溶液颜色变黄．进一步的实验表明，溶液中碘离子浓度降低、溶液的电导率增大、pH值升高，而且溶液中生成了单质碘．根据对上述实验研究结果，我们对碘化钾作为过氧化氢分解反应的催化剂的概念提出了质疑。并证实发生了过氧化氢氧化碘化钾的化学反应．     

银氨体系抗坏血酸还原制备超细球形银粉

以银氨为原料,抗坏血酸为还原剂制备超细球形银粉。考察加料速度、溶液初始pH、反应温度、AgNO_3溶液浓度等工艺参数对银粉形貌、粒径的影响,对银粉进行扫描电镜、X线衍射和ζ电位分析等表征,研究银粉的分散和生长机理。研究结果表明:采用快速加料法,在硝酸银溶液浓度不大于0.5 mol/L,反应温度低于60℃,银氨溶液初始pH为12.0,不使用分散剂的条件下,可制备出分散性好,形貌规则的球形银粉。银粒子在该体系中具有自分散作用,银粉的生长符合二段生长模型。     

一种含硫纤维吸附材料对Ag^＋离子吸附性能的研究

研究了一种含硫的纤维吸附材料对Ag（I）离子的吸附性能,对Ag^＋离子的吸附可达1510mg／g（干纤维）,并具有良好的吸附动力学特性,考察了温度、pH、含硫量等对该纤维材料吸附Ag^＋离子的影响,该纤维材料可用于混合溶液中Ag（I）离子的吸附分离。     

鲢鱼副产物蛋白质酶解条件的优化

本文以鲢鱼副产物中蛋白质为酶解底物,采用三因素二次旋转下交回归设计,研究水反应中酶-底物浓度经（[S]/[S]）PH,温度（T）三个因素对蛋白回收率的影响,得出最优水解条件为[E]/[E]=3.33%.PH=8.54.T=58C,蛋白回收率>75%.     

土壤中反硝化作用的试验研究

通过室内土柱试验,研究了土壤中的反硝化作用机理及其影响因素。假设反硝化作用符合一级反应的离散方程,描述土壤中ＮＯ３＾－离子的输运迁移规律,此方程反映了ＮＯ３＾－浓度、土柱淋溶时间、柱深、反应速率常数和溶液平均流速的函数关系。结果表明,环境条件（如温度,ｐＨ值、基质ＮＯ３＾－浓度等）是影响反硝化作用反应速率的重要因素。     

不同磁场对过氧化氢酶活性及酶促反应的影响

在不同的磁场条件下研究了Nu—Fe—B静磁场对过氧化氢酶活性和反应动力学参数及二级结构的影响．采用磁场强度为0．15T、0．30T、0．45T的静磁场分别处理过氧化氢酶溶液,以曝磁时间为参数,对酶的活性、反应动力学参数、二级结构分别进行测定．结果表明,与对照样相比,处理过的过氧化氢酶活性增大,当作用时间为1h时,活性最大．3个磁场下酶的活性分别增加了18．2％、23．5％和25．8％;用不同的磁场对过氧化氢酶溶液分别作用1h,与对照样相比,随着磁场强度的增加,Km值从0．02785mol／L增加到0．08724mol／L,Vm值从0．03597mol／（L·min）增加到0．09511mol／（L·min）;同时,圆二色光谱测定结果表明磁场处理过的过氧化氢酶的二级结构也发生变化,这可能是由于磁场对过氧化氢酶辅酶中的Fe^3＋影响而引起的．     

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.     

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.     

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。     

A computer generator for randomly layered structures

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

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.     

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.     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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