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。     

硫酸铁改性活性炭催化微波照射快速降解亚甲基蓝的研究

在硫酸铁改性活性炭存在下，微渡照射能使溶液中的亚甲基蓝迅速降解。对总体积25mL，浓度100mg／L的亚甲基蓝溶液，改性活性炭加入量0．4g／L，微波照射3．0min时亚甲基蓝的降解率可达69．31％。适当提高改性活性炭加入量，如1．0g／L时，同样照射条件下溶液中的亚甲基蓝降解率即可达100％。结果表明，改性活性炭作为微波降解亚甲基蓝的催化剂具有降解速率快，成本低，没有中间产物生成和不会造成二次污染等优点，适合于大规模治理染料废水。另外，采用紫外一可见光谱和离子色谱技术探讨了微波照射时问、亚甲基蓝初始浓度、改性活性炭用量、改性液硫酸铁浓度和酸度以及溶液酸度对亚甲基蓝降解率的影响。     

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。     

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.     

A computer generator for randomly layered structures

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

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。     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to     

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

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.