铅和铬对鱼类联合毒性的研究

采用斑马鱼研究铅和铬共存的联合毒性。二价铅对斑马鱼的２４ｈ、４８ｈ和９６ｈ的半致死浓度分别为１７１、１５５和１４６ｍｇ／ｌ,六价铬对斑马鱼的２４ｈ、４８ｈ和９６ｈ的半致死浓度分别为１１２、６７和５０ｍｇ／ｌ。在浓度１∶１的情况下,铅和铬共存对斑马鱼２４ｈ、４８ｈ和９６ｈ的半致死浓度分别为３５、２９和２６ｍｇ／ｌ。根据Ｍａｒｋｉｎｇ的指数法求得２４ｈ、４８ｈ和９６ｈ的相加指数ＡＩ分别为０８９、０６１和０４３,皆大于零,表现为协同作用。     

葡萄糖和果糖的速差动力学光度法同时测定

利用葡萄糖和果糖与 ２,４二硝基酚在强碱性介质中反应生成红色化合物的反应速度差,建立了光度法同时测定葡萄糖和果糖的速差动力学法．当 Ｎａ Ｏ Ｈ 浓度为 １６×１０－ ３ ｍ ｏｌ／ Ｌ,２,４二硝基酚浓度为 １２×１０－ ３ ｍ ｏｌ／ Ｌ,分别在 ５０℃下反应 ８ｍ ｉｎ 和 ５５℃下反应 ６ ｍ ｉｎ 时,同时测定葡萄糖的线性范围为 ０～９６０×１０－ ３ ｍ ｏｌ／ Ｌ,果糖的线性范围为０～２００×１０－ ３ ｍ ｏｌ／ Ｌ．对葡萄糖与果糖浓度比为１５∶１～１∶１ 的混合液进行回收试验,回收率为９６３％ ～１０５３％ ．该方法已用于果葡糖浆的分析     

停流—反相流动注射分析法测定环境水样的化学需氧量

以铈（Ⅳ）作氧化剂，利用停流反相流动注射技术测定水样的化学需氧量（ＣＯＤ）．检测范围２５～１６０ｍｇ／Ｌ，采样频率为１２ｈ－１，检测限和标准偏差分别为２１ｍｇ／Ｌ和０９％．     

大蒜鳞芽组织脱分化条件的分析与预测

以大蒜鳞芽基部组织为外植体，用二次回归通用旋转组合设计进行愈伤组织诱导研究。结果表明：培养基中附加的２，４－Ｄ、ＮＡＡ和６－ＢＡ三种激素中，２，４－Ｄ起决定作用，三者与愈伤组织诱导率之间的回归方程为：Ｙ＝６５．１２－１８．４７ｘ１－８．５６ｘ３－９．１７ｘ１２１６．６３ｘ２２－１２．１５ｘ３２经计算机模拟推测，最佳诱导培养基为：ＭＳ＋２，４－Ｄ０．９８ｍｇ／Ｌ～１．１４ｍｇ／Ｌ＋ＮＡＡ０．９３ｍｇ／Ｌ～１．０９ｍｇ／Ｌ＋６－ＢＡ１．１９ｍｇ／Ｌ～１．３６ｍｇ／Ｌ。     

稀土元素镧(Ⅲ)与铈(Ⅲ)对盐卤虫的急性致毒效应

研究了稀土元素镧与铈对盐卤虫（Ａｒｔｅｍｉａｓａｌｉｎｅ）的急性致毒效应。盐卤虫在硝酸镧溶液中暴露１２、２４、４８、７２、９６ｈ的中间忍受限分别为８９７８、８１４１、６９１２、６７１４、６６４７ｍｇ·Ｌ－１，在硝酸铈溶液中暴露１２、２４、４８、７２、９６ｈ的中间忍受限分别为９０７５、９０１１、６４００、４５００、４０００ｍｇ·Ｌ－１。稀土元素镧、铈对盐卤虫属低毒物质。     

6-DMAP诱导马氏珠母贝三倍体

用６－二甲基氨基嘌呤（６－ＤＭＡＰ）抑制马氏球母贝（ＰｉｎｃａｔａｄａｍａｒｔｅｎｓｉｉＤｕｎｋｅｒ）受精卵的极体释放获得三倍体,在２６℃条件下,进行了不同浓度梯度的６－ＤＭＡＰ（４０ｍｇ／Ｌ,６０ｍｇ／Ｌ,８０ｍｇ／Ｌ,１００ｍｇ／Ｌ,１２０ｍｇ／Ｌ）和不同的处理持续时间（５ｍｉｎ,１０ｍｉｎ,１５ｍｉｎ,２０ｍｉｎ,２５ｍｉｎ）的诱导实验,抑制第一和第二极体的三倍体诱导率最高分别为达３２．４％     

流动注射荧光熄灭法测定痕量磷酸根离子

研究了以铝－ 桑色素为荧光试剂, 在酸性条件下利用荧光熄灭法, 并结合了流动注射分析测定了水中微量磷酸根离子的方法． 测定ＰＯ３ －４ 的线性范围１ ～９ ｍｇ／Ｌ, 检测限为０－００２ ｍｇ／Ｌ, １ｈ可以测定６０ 份样品, 相对标准偏差为１－０９ ％ ．     

基因重组人Gamma-干扰素发酵和提取优化工艺的研究

对基因重组人Ｇａｍｍａ－干扰素（ｒＩＦＮ－γ）ＰＢＶ２２０ＤＨ５α工程菌株的发酵工艺进行了研究．结果表明,采用在２５０ｍＬ摇瓶中装液量为１５０ｍＬ,按照１∶４０的稀释比进行两次扩大培养,并在大肠杆菌生长最为活跃的对数生长期内进行诱导表达效果最好．收集菌体以后,将菌体进行冷冻和超声破碎,并在２．０ｍｏｌ／Ｌ脲中浸泡８ｈ～９ｈ以清洗杂蛋白,然后用７．０ｍｏｌ／Ｌ盐酸胍（Ｇｕ·ＨＣｌ）提取．在优化工艺条件下,ｒＩＦＮ－γ的收量为９．０×１０６ＩＵ／Ｌ～１２．８×１０６ＩＵ／Ｌ,总蛋白为７９．５ｍｇ／Ｌ～１２７．２ｍｇ／Ｌ,比活为５．６×１０５ＩＵ／ｍｇ～８．０×１０５ＩＵ／ｍｇ,ＳＤＳ－ＰＡＧＥ电泳含量可达６０％～８０％,使ＰＢＶ２２０ＤＨ５α工程菌株获得了高效表达．     

氧气液相催化氧化对硝基甲苯邻磺酸的研究

研究了碱种类及其浓度Ｍａ、对硝基甲苯邻磺酸浓度ＭＮＴＳ对氧气液相氧化对硝基以４,４－二硝基二苯乙烯－２,２－二磺酸（ＤＮＳ）的影响。发现在水介质吧模拟酶催化剂Ｍ２＝１．０ｍｏｌ／Ｌ、ＭＮＴＳ＝０．３８ｍｏｌ／Ｌ于控温温度６０℃下反应１８ｈ,可以获得８１．８％的粗品收率,其纯度用高铲液相色谱（外标法）测定可达９６．７％。ＤＮＳ的结构通过核磁共振谱得以确认。     

一氧化氮吸入对缺氧性肺动脉高压患者一氧化氮合酶和内皮素的影响

探讨吸入一氧化氮（ＮＯ）对缺氧性肺动脉高压患者一氧化氮合酶（ＮＯＳ）和内皮素（ＥＴ）的影响。方法：１３例肺动脉高压患者行ＮＯ吸入，分别于吸入ＮＯ前、吸入３０ｍｉｎ时、停止吸入２ｈ和１２ｈ时采肺动脉血，测白细胞中的ＮＯＳ及血浆中的ＥＴ。结果：吸入ＮＯ前、吸入３０ｍｉｎ时、停止吸入２ｈ和１２ｈ，所测ＮＯＳ值分别为（０７０±０．２１）ｍｏｌ／ｍｉｎ·ｍｇ－１、（０７４±０１４）ｍｏｌ／ｍｉｎ·ｍｇ－１、（０６４±０２２）ｍｏｌ／ｍｉｎ·ｍｇ－１和（０６３±０１７）ｍｏｌ／ｍｉｎ·ｍｇ－１；所测ＥＴ为（７８８９±４６５９）ｐｍｏｌ／Ｌ、（８８２７±４５４１）ｐｍｏｌ／Ｌ、（８０７６±４２６６）ｐｍｏｌ／Ｌ和（６１０７±２９．４４）ｐｍｏｌ·Ｌ－１；后三者同吸入前比，均Ｐ＞００５。结论：缺氧性肺高压患者吸入ＮＯ对机体ＮＯＳ和ＥＴ未见明显影响     

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).     

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.     

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.