HPLC法检测发酵液中的木糖和木糖醇

建立高效液相色谱检测发酵液中木糖和木糖醇含量的分析方法．色谱柱为ZORBAX碳水化合物，柱温30℃，流动相为乙腈：水=80：20（V／V），流速1．2mL／min，示差折光检测器检测．木糖和木糖醇在 0．5～40．0mg／mL范围内浓度与峰面积线性关系良好（R2分别为0．9931和0．9947），平均回收率分别为99．80％（n=5，RSD=1.35％）和99．62％（n=5，RSD=1．65％）．方法简便、快速、准确。     

中药材中西维因残留量的薄层色谱法测定

本文研究了中药材西维因残留量的薄层色谱-荧光测定．采用环已烷：丙酮：氯仿=5：1：1(V/V)作为展开剂，直接用荧光测定．本法灵敏度高，且易操作，当添加水平为0．01mg／mL时，回收率在84％-111％之间，线性相关系数为0．9998，检测限达到10ng．     

反相高效液相色谱法同时测定4种苯二氮Chuo类药物

提出了一种反相高效液相色谱法同时测定4种苯二氮Chuo类药物的分析方法。考察了4种苯二氮Chuo类药物的保留值与流动相组成、流速、pH及柱温等色谱条件的关系，优化了色谱条件．确定了以ODS Hypersil为色谱柱，甲醇-水(5l：49；V／V，用氨水调pH7．8)为流动相，流速为0．8mL／min，柱温为45℃，检测波长为220nm的最佳色谱条件,甲苯作为内标物，以内标法峰面积定量,硝西泮，地西泮，三唑仑和艾司唑仑线性范围分别是0．1mg／L～320mg／L，0．2mg／L～320mg／L，0．1mg／L～320mg／L和0．08mg／L～320mg／L．检测限分别为0．1mg／L，0．2mg／L，0．1mg／L和0．08mg／L,该方法用于尿液中的苯二氮革类药物的测定,其回收率为97．0％～108．7％，标准偏差为1．7％～3．0％(n=7),该方法简单、快速、精确、灵敏、重复性好。     

用柱后衍生荧光测定法检测食品中土霉素和四环素残留

应用高效液相色谱(HPLC)对动物性食品中土霉素(OTC)和四环素(TC)进行测定，样品经含乙二胺四乙酸二钠的丁二酸钠缓冲液除蛋白后，由SPE-C18小柱提纯净化，经ODS-C18柱分离后，用8％氧氯化锆溶液柱后衍生，与锆离子的螯合物在激发波长(Ex)：406nm和发射波长(Em)：515nm处检测。实验优化了锆试剂的浓度和柱后衍生的条件，提高了栓出的灵敏度，土霉素和四环素的回收率分别为89．59％和92．59％，变异系数(CV)分别为4．98％和6．74％。土霉素和四环素的最低栓出浓度(信噪比5：1)分别为3μg/L和5μg/L，线性范围为0．01～10μg/L，土霉素和四环素的相关系数分别为0．9999和1．0000。     

HPLC-DAD法测定补肾壮骨胶囊中紫丁香苷的质量比

为控制补肾壮骨胶囊中紫丁香苷的质量比,采用反相高效液相色谱方法,以Symmetry C18为色谱柱,V甲醇：V0.2％冰醋酸水溶液=55：45为流动相,流速1mL／min,柱温：30℃,二极管阵列检测器,提取波长为265nm,测得补肾壮骨胶囊中紫丁香苷的质量比为1．46mg／g,平均回收率为98．25％,结果表明,该方法简便、准确、重现性好,适用于补肾壮骨胶囊的质量控制．     

TLCS法测定二陈丸中的β-谷甾醇

采用薄层扫描法测定了二陈丸中β-谷甾醇的含量．样品经提取点于硅胶GF254薄层板上，以V(甲苯)：V(乙酸乙酯)=4：1为展开剂，用质量分数5％硫酸乙醇溶液显色，85℃烘干定位，检测波长501nm。结果是平均加样回收率为100．6％(n=5)，RSD为2．8％。该方法可用于二陈丸的质量控制。     

锌镀层表面杂多酸盐彩色配合物膜的XPS和AES研究

在锌镀层表面，磷钼矾和铈硅钨三元杂多酸(盐)具有较好的配位成膜能力，获得多种具有金属光泽的不溶性彩色配合物膜，膜层有良好的耐蚀性能和装饰效果。加速腐蚀试验结果表明，Na6(PMo9V30Oo）xHzO和K15[Ce(HSiW9O34)2]．xH2O与锌镀层反应时，形成两种新型的杂多酸盐金黄色配合物膜耐蚀性最佳。XPS和AES分析表明，Na6[(PMo9V3O40]．xH2O膜层中钼在膜表面的价态为 6，而在膜内层则以 6、 4价共存，其它元素的价态分别为：Zn( 2)、P( 5)、V( 5)，从其AES深度剥蚀曲线的组成恒定区求得膜的组成为：Zn 19．7％，Mo 29．3％，V21.2％，P16．1％，O 13．5％，膜层的厚度为160nm。K15[Ce(HSiW9O34)2],xH2O膜层中元素的价态分别为：Zn( 2)、Ce( 4)、Si( 4)、w( 6)，组成为：Zn11．3％，Ce13．7％，Si 21．5％，W 26．9％，O 28．8％，膜厚230nm。     

H2O2-有机酸降低汽油中烯烃含量研究

用H2O2(w=30％)对含烯烃的模拟油品进行氧化，探讨了各种催化剂对氧化反应的影响。结果表明，酸碱催化剂都可促进H2O2氧化反应的进行，对降低油品中烯烃效果，有机酸条件明显好于碱性和中性条件，甲酸的催化效果优于乙酸。在H2O2甲酸氧化降烯烃的过程中，当3种样品的体积比即V(模拟油品)：V(H2O2)：V(甲酸)=4：1：1，反应温度45℃，反应时间1h时，模拟体系中烯烃降低率为35．8％，流化催化裂化汽油中烯烃降低率达22．1％。     

白阿魏菇菌丝体多糖分离纯化工艺的优化和结构分析

对白阿魏菇菌丝体多糖的提取和纯化进行了优化设计，粗多糖经DEAE—cellulose及SephadexG-100柱层析，纯化得纯多糖(PNMP)，该多糖经聚丙烯酰胺凝胶电泳，SephadexG-100柱层析和紫外光谱分析鉴定纯度；通过红外光谱，气相色谱对PNMP进行组分分析；再用高碘酸氧化，Smith降解和测硫酸基法来鉴定其化学结构．结果表明，白阿魏菇菌丝体多糖提取最佳工艺为，用水浸提3h，pH7．O，温度90℃，搅拌，料水比为1／15，浸提2次，醇析浓度70％；蛋白质去除中，V氯仿：V正丁醇=2：V样品：V氯仿-正丁醇=2：1，萃取时间为40min，得粗多糖CPNMP，纯度为59．2％；在结构分析中，纯多糖(PNMP)纯度为83．22％，硫酸基含量为7．5％；该多糖至少由半乳糖、甘露糖、葡萄糖、阿拉伯糖等组成，糖苷键连接方式为1→3，1→6。     

RP-HPLC法同时测定延胡索药材中延胡索乙素和原阿片碱

建立了反相高效液相色谱(RP-HPLC)法同时测定延胡索药材中延胡索乙素与原阿片碱含量的方法，并对不同产地延胡索药材中延胡索乙素与原阿片碱含量进行了考察．结果表明，使用Phenomenex Luna C18色谱柱，甲醇一磷酸盐缓冲溶液(pH=7．68，V：V=65：35)流动相，在检测波长281nm下，测定延胡索乙素与原阿片碱的线性范围分别为0．13～4．68μg和0．09～3．24μg，平均回收率分别为101．86％和98．13％，RSD分别为1．42％和1．36％．结果表明，此法简便、准确、快速，可用于药材中延胡索乙素与原阿片碱含量的测定，也可用于含这两种生物碱的药材的质量评价；两种生物碱含量在不同产地及来源延胡索药材中有较大差别．     

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.     

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.     

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.