肝大部切除前后热休克处理对热休克蛋白、酸性磷酸酶和碱性磷酸酶活性影响的分析

综合了磷酸酶的原位复性电泳、体视学分析、比色分析等方法分析①切除大白鼠大部分肝后的肝再生期间,②热休克处理大白鼠（４６℃、３０ｍｉｎ）恢复８ｈ,再切除大部分肝后的肝再生期间,③切除大部分肝恢复４ｈ,再热休克处理（４６℃、３０ｍｉｎ）后的肝再生期间热休克蛋白（ＨＳＣ７０／ＨＳＰ６８）、酸性磷酸酶（ＡＣＰ）和碱性磷酸酶（ＡＫＰ）动态变化的资料,从６个方面比较分析了ＨＳＣ７０／ＨＳＰ６８,ＡＣＰ和ＡＫＰ在肝再生中的相互关系及对肝再生的可能作用     

大鼠不完全性视网膜缺血的组织学变化

采用双侧颈总动脉阻断血流（２ＶＯ）的方法，造成大鼠不完全性视网膜缺血，用组织学方法观察了不同缺血时间（３０、９０ｍｉｎ，４、７、３０ｄ）的缺血后再灌注与不再灌流对视网膜变化的影响。结果显示：缺血３０和９０ｍｉｎ再灌流４ｄ后，内炕网膜（包括外网层、内核层、内网层、节细胞层、神经纤维怪和内界膜）明显增厚；其他不再灌流的缺血组，厚度趋向减少。节细胞计数随缺血时间延长逐渐减少；缺血４ｄ后明显减少。提示不完     

低温条件下山莨菪碱对缺血再灌注损伤期肾内前列腺素的影响

目的：研究低温条件下山莨菪三兔肾缺血再灌注损伤期肾内前列腺素的影响及肾功能的保护作用。方法：在兔肾缺血再灌注损伤模型上,分别 检测假手术（无缺血组）、对照组（缺血再灌注损伤组）、山莨菪硷治疗组、低温治疗组低温条件下山莨菪碱组缺前和恢复血液灌注２４h的肾组织血栓素Ｂ２（ＴＸＢ２）,６－酮－前列腺素Ｆ１α（６－Keto-PGF1α）的含量以及检测各组恢复血液灌注２４h各组血肌酐）ＳＣr)、尿素氯（ＢuN）含量。结果：山莨菪 硷组和低温组、低温条件下山莨菪碱治疗组ＴＸＢ、６－Keto-PGF1α、血肌酐（ＳCr),、尿素氮（ＢuN）及６－Keto-PGF1α／ＴＸＢ２（Ｋ／Ｔ）与对照组相比较有显著性差异（Ｐ＜０．０５）,低温条件下山莨菪碱治疗组优于山菪硷组和低温（Ｐ＜０．０５）。结论菪硷 与低低温改善肾内前列环素（ＰＧＩ２（）－血栓素Ａ２（ＴＸＡ２）平衡紊乱,对兔肾缺血再灌注损伤均有一定的保护作用。低温条件下山莨菪碱更能够有效纠正肾内ＰＧＩ２－ＴＸＡ２平衡紊乱,改善肾内微循环,明显优于山劳苦 硷或低温单独应用。     

SMAO休克过程兔肾组织NO、CO、H_2S的动态变化观察

目的——观察肠系膜上动脉夹闭性休克（SMAO休克）过程兔肾组织中一氧化氮（NO）、一氧化碳（CO）、硫化氢（H2S）的动态变化。方法——随机取40只新西兰大耳白兔分为5组：假手术组、缺血60min组（I组）、缺血60min再灌注30min组（I/R30min组）、缺血60min再灌注60min组（I/R60min组）、缺血60min再灌注120min组（I/R120min组）,每组8只。检测SMAO休克过程各组兔肾组织NO、CO、H2S的动态变化。结果与假手术组相比,I组肾组织匀浆NO含量明显增高,再灌注后NO降低（P〈0.01）;实验各组肾组织匀浆CO均降低（P〈0.01）;I组的肾组织匀浆H2S含量明显增高（P〈0.01）,再灌注30min达到最高,之后逐渐降低（P〈0.01）。结论——SMAO休克致内毒素血症,随着再灌注时间的延长肾组织中NO、CO和H2S的动态变化,参与了肾脏的损害。     

30℃时K2SO4和（NH4）2SO4在CH3OH—H2O溶液中的共饱和度研究

本研究测定了３０℃时Ｋ２ＳＯ４－（ＮＨ４）２ＳＯ４－ＣＨ３ＯＨ－Ｈ２Ｏ元体系的共饱和度，分析了ＣＨ３ＯＨ含量对Ｋ２ＳＯ４及（ＮＨ４）２ＳＯ４共饱和度的影响，得出了以ＣＨ３ＯＨ为盐析剂，从Ｋ２ＳＯ４和（ＮＨ４）２ＳＯ４的水溶液中晶析Ｋ２ＳＯ４的规律，为Ｋ２ＳＯ４和（ＮＨ４）２ＳＯ４的分离提供理论依据。     

家电新宠—摄录机

改革开放２０年，人民的生活水平有了很大的提高，小型摄录机已开始进入家庭。目前，国内市场上摄录机基本是日货一统天下，有松下、索尼、日立、夏普、ＪＶＣ等，以松下、索尼为代表，分成两大集团，即松下、ＪＶＣ为一集团，索尼、日立、夏普为一集团。这两大集团各代表了两种互不兼容的格式，即ＶＨＳ－Ｃ（俗称盒中带）和８ｍｍ（俗称Ｖ８）。因此，当您选中了某一品牌，就决定了您今后所用的录像带规格。以松下为代表的ＶＨＳ－Ｃ格式的录像带尺寸为９２ｍｍ×５９ｍｍ×２３ｍｍ，有３０ｍｉｎ、４５ｍｉｎ、６０ｍｉｎ，以索尼为代表…     

利用热带假丝酵母提高酶解马铃薯汁的蛋白质含量

马铃薯汁用糖化酶水解，接种热带假丝酵母，在摇床中３０℃，１２０ｒ／ｍｉｎ培养３ｄ．分别用（ＮＨ４）２ＳＯ４或柠檬酸铵为氮源，用Ｎａ２ＨＰＯ４－ＫＨ２ＰＯ４缓冲液和ＣａＣＯ３为ｐＨ值稳定物质时，测定发酵基质中蛋白质的增加量．结果表明，以（ＮＨ４）２ＳＯ４为氮源，用Ｎａ２ＨＰＯ４－ＫＨ２ＰＯ４缓冲液（０．０２ｍｏｌ／Ｌ，ｐＨ６．８）和ＣａＣＯ３（０．３％）为ｐＨ稳定物质时，发酵基质中蛋白质含量的增加值最大，以干重计，蛋白质含量从１０．４％增加到３９．６％．     

应用聚合物支载的苄基硒醇制备酮

应用氯球（Ｐ○ＣＨ２Ｃｌ）与ＮａＨＳｅ反应，得到聚合物支载的苄基硒醇（Ｐ○ＣＨ２ＳｅＨ），用ＮａＢＨ４还原为Ｐ○ＣＨ２ＳｅＮａ后，与卤代物反应生成载体化的硒醚，经３０％Ｈ２Ｏ２氧化得到相应的酮     

HTH—4液晶聚酯合成路线的改进

以对羟基苯甲酸甲酯和１，４－丁二醇为原料，在酯交换催化剂Ｔｉ（ＯＣ４Ｈ９－ｎ）４／Ｓｎ（ｎ－Ｃ４Ｈ９）２（Ｃ１１Ｈ２３ＣＯＯ）２存在下，采用熔融酯交换反应合成出单体：双（对羟基苯甲酸）丁二醇酯（ＢＢＨＢ）。然后再与对苯二甲酰氯分别在３种不同的溶剂中进行溶液缩聚，合成出３个不同分子量的ＨＴＨ－４聚合物样品，并用ＤＳＣ、ＰＯＭ对其液晶性进行了表征。     

簇合物Co6（μ6—P）（μ—SCH2CH2CH2S）（μ—PSCH2CH2CH2S）…

用Ｃｏ２（ＣＯ）８与含硫含磷杂环配体ＣｌＰＳＣＨ２ＣＨ２ＣＨ２Ｓ反应，合成得到含有半填隙μ６－Ｐ原子的新的六核簇Ｃｏ６（μ６－Ｐ）（μ－ＳＣＨ２ＣＨ２ＣＨ２Ｓ）（μ－ＰＳＣＨ２ＣＨ２ＣＨ２Ｓ）（ＣＯ）１２１，同时，得到三核簇Ｃｏ３（μ－ＰＳＣＨ２ＣＨ２ＣＨ２Ｓ）３（ＣＯ）６２，通过元素分析和波谱表征确定了二个簇合物的分子结构。     

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).     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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