养殖鳖主要细菌性疾病病原的初步研究

养殖鳖细菌性疾病是全国养鳖业的主要疾病，危害对象从稚鳖到成鳖、亲鳖。从１９９６－１９９８年对养殖鳖主要几种细菌性疾病和肠道出血性败血症、鳖穿孔病，红脖子红底板病，鳖腐皮病的病原进行研究。     

中华鳖水泡病病原病理学研究

１９９３年８月信阳师院生物系特种动物养殖研究所的试验鳖场孵化出一批小鳖。同年１０月有一只鳖得了一种新的疾病，病鳖颈根部和右下肢基部各有一大水泡，暂名“水泡病”。本文对其分离菌进行了研究，鉴定为嗜水气单胞菌。中华鳖水泡病的致病机理，可能与病原菌的毒力与传染途径有关，而鳖的抗病能力是能否引起该病的关键，外界环境因素是引起该病的诱因。     

抗气单胞菌高免疫抗体的制备和应用

按照程序，以自制的鳖烂甲病菌苗反复免疫临产蛋鸡，收集高效价鸡蛋和血清，制成高免抗体，治疗鳖烂甲病效果明显。     

中华鳖腐皮病的病理组织学初步研究

取病鳖的肝，肠，脾，肾和溃烂处皮肤等组织数块，Ｚｅｎｋｅｒ‘ｓ液固定，石蜡包埋，ＨＥ染色。观察结果显示，病鳖肝细胞发生不同程度的变性以至坏死，肝血窦淤血，肠粘膜溃疡，肠壁结构被破坏。     

浅谈鳖病的预防

鳖病与其他水生动物疾病一样，重在预防，然而，患了病之后务必做到及早治疗，这样可以减少损失和提高疗效。关于鳖病的预防，根据笔者的实践体会认为温室养鳖必须从生态环境、投饲管理和药物预防三方面紧密结合方能奏效。生态环境主要指水温和水质两个环节，如系塑料大棚温室要求提供充分光照的条件。温室中水温要求恒温在３０℃左右，水质的几个主要指标要符合鳖生长的要求，如ｐＨ值７～８．５，溶解氧５ｍｇ／Ｌ左右，氨氮在４ｍｇ／Ｌ以下，亚硝酸盐０．１ｍｇ／Ｌ以下，有机物耗氧量在１２ｍｇ／Ｌ以下。这些指标与投饲管理密切刊关，…     

中华鳖气单孢菌类疾病研究

对气单孢菌性鳖病做了大量的研究,取得了如下几方面的进展：（1）国内最先发现并报道了鳖白点病,水泡病;（2）澄清了鳖烂甲病,肿脖子病,白底板病,腹水病的病原及其关系;（3）揭示了嗜水气单孢菌在组织的分布和疾病的发生机制;（4）拟定出对各种鳖病的防治方法,多年的临床实践资料显示,在中等管理水平下,本成果的技术方法可控制“白点病”发病率在2％以下,烂甲病和肿脖子病发病率在1．5％以下,使烂甲病,肿脖子病治愈率达到85－93％,腹水病轻,中度病鳖转归率在97．7％以上。     

中国对虾暴发性流行病病原的免疫组织化学研究

对未感染中国对虾，实验感染暴发性流行病病原体后3h,12h,24h和36h及96h和136h，进行了系统的免疫组织化学研究，结果显示感染病虾的多种组织细胞呈阳性反应，说明暴发性流行病病原体具有广泛的宿主靶细胞，其中最易感的靶细胞是鳃、胃、后肠中具有合成和分泌几丁质动能的细胞，于暴发性流行病病原体侵入虾机体的体途径，使对虾致病和死亡的原因进行了探讨。     

鳖疖疮病的组织病理研究

鳖疖疮病的组织病理研究①颜素芬江福来（集美大学水产学院养殖系厦门３６１０２１）随着我国养鳖业的迅速发展，鳖（Ｔｒｉｏｎｇｘｓｉｎｅｎｓｉｓ）的病害也日渐增多并趋严重．有关鳖病的研究，日本［１，２］和我国［３～６］虽然在病原和防治方面陆续有文章报道，但...     

中华鳖穿孔病的血液病理研究

中华鳖穿孔病由细菌感染引起,其主要症状是体壁溃烂穿孔。试验分别测定了患穿孔病中华鳖和健康中华鳖血液的谷丙转氨酶、谷草转氨酶、球蛋白、白蛋白、肌酣、尿素氮、葡萄糖、钠、氯、钙等10项指标。测试结果表明,病鳖血液谷草转氨酶、葡萄糖、钙的含量都非常显著高于健康鳖,而尿素氮、钠、氯都显著低于健康鳖。这些血液特性变化表明,病鳖的肝、肾、心等发生了严重的病变,揭示了中华鳖穿孔病的血液病理变化规律。     

常见鳖病及其防治

介绍了鳖病的特点、流行规律,重点对常见鳖病的病原、症状、防治方法进行了阐述.     

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.