乳腺癌中PTEN蛋白表达及其与ER和PR表达的相关性

目的 探讨乳腺癌中FFEN抑癌基因表达和ER、PR表达之间的关系。方法采用免疫组化S-P法分别检测80例乳腺癌及癌旁组织中PTEN蛋白及ER、PR的表达：结果PYEN蛋白在乳腺癌组织中的阳性表达率显著低于癌旁组织，两者相比差异有显著性（P〈0．01）：PTEN蛋白在淋巴结转移组中的阳性表达率明显低于淋巴结无癌转移组（P〈0．01）。PTEN蛋白分别和ER、PR在80例乳腺癌中的表达呈正相关（P〈0.05；P〈0．05）。结论PTEN蛋白的表达缺失与ER、PR表达失衡在乳腺癌的发生、发展中起重要作用。     

大肠癌中DCC基因表达及其临床意义

目的：探讨大肠癌中DCC蛋白表达及其生物学行为的关系。方法：采用免疫组化法检测45例正常大肠组织、57例大肠癌组织DCC蛋白的表达情况。结果：大肠癌组织DCC蛋白阳性表达率为31．6％,明显低于大肠正常组织（100％）,两组差异显著（P〈0．05）,且DCC的表达与大肠癌分化程度、浸润转移及淋巴结转移显著相关（P〈0．05）,但与患者的性别、年龄、肿瘤部位等无相关性。结论：DCC表达缺失与大肠癌的分化、侵袭、转移有关,可判断大肠癌的预后。     

肺癌中EGFR、P21及C-myc的表达

目的 探讨EGFR、P21蛋白和C-myc在肺癌中的表达及相互关系。方法用免疫组织化学方法（SABC法）观察EGFR、P21蛋白和C-myc在肺癌组织及邻近正常组织中表达。结果EGFR表达率87．01％，与组织类型明显有关（P〈0．001），P21表达率为51．94％，腺癌中表达率为85．71％，与其它类型间有显著差异（P〈0．01）；C-myc阳性表达率为51．94％，腺癌和其它类型间有明显差异（P〈0．05）。但未显示EGFR、P21蛋白和C-myc与分化程度的关系：结论EGFR、P21蛋白和C-myc在肺癌中均呈高表达，提示在肺癌发生中起重要作用。     

VEGF 和 PCNA在乳腺癌组织中表达的意义

为了探讨血管内皮生长因子（VEGF）和增殖细胞核抗原（PCNA）在乳腺癌组织中的表达及其与病理学分级关系，采用免疫组织化学SP法检测102例乳腺癌及其中48例癌旁正常乳腺组织中VEGF和PCNA的表达，实验结果显示VEGF在乳腺癌组织中的阳性表达率为84．31％，癌乳腺组织中则为12．50％，两者间具有高度显著性差异（P＜0．01），PCNA在乳腺癌组织中的阳性表达率为78．43％，癌旁正常乳腺组织中则为8．33％，它们之间的差异有高度显著性（P＜0．01），VEGF和PCNA的阳性表达率与乳腺癌病理学分级呈正相关，说明VEGF和PCNA阳性表达作为乳腺 辅助诊断指标。     

HIF-1α表达对人乳腺癌细胞侵袭转移能力的影响

为研究缺氧诱导因子-1α（HIF-1α）在人乳腺癌细胞中的表达及其与乳腺癌细胞侵袭转移能力的相关性,采用在培养基中加入CoCl2模拟化学缺氧培养细胞,RT—PCR和Western-blot、免疫细胞化学检测HIF-1α在人乳腺癌细胞MCF-7和MDA—MB-231中mRNA水平和蛋白质水平在缺氧前后的表达差异,及Millicell小室人工重组基底膜侵袭迁移实验检测缺氧前后两株细胞侵袭迁移能力的改变．结果发现：缺氧后,两株细胞的HIF-1α mRNA水平和蛋白质水平均较缺氧前增高（p〈0．01）,MDA—MB-231和MCF-7之间有显著差异（p〈0．01）;MDA—MB-231的侵袭转移能力明显增加（p〈0．01）,MCF-7的侵袭转移能力略有增加（p〈0．05）．表明缺氧上调HIF-1α转录及蛋白表达,进而促进乳腺癌细胞的侵袭转移能力．     

肺癌组织中P~(53)和ras-P~(21)癌基因蛋白的免疫组织化学研究

目的：为探讨肺癌组织中P53和P21癌基因蛋白的表达及其临床意义。方法：应用免疫组化方法（S－P法）检测69例肺癌组织标本中P53和P21癌基因蛋白表达,结果采用卡方检验。结果：P53和P21在肺癌组织中的阳性表达率分别为49.3％、68．1％;肺癌癌旁支气管粘膜和腺体中的阳性表达率分别为0和17.6％,与肿瘤区相比较差异均非常显著（P＜0．01）。P53蛋白表达与肺癌病人术后生存期有一定关系,P53阳性率越高,其存活期越短。P21蛋白表达肺腺癌高于肺鳞癌（P＞0．05）。P53和P21蛋白表达与肺癌病人性别、年龄、肿瘤分期和分化程度无关。结论：肺癌患者术后预后不良与P53蛋白积累有关,P53蛋白蓄积是判定肺癌预后的指标之一,ras基因突变是肺癌发生的早期事件,与肺腺癌发生更有密切关系。     

大肠癌中MTA1和nm23 - H1蛋白的表达及其意义

目的：探讨大肠癌中MTA1、nm23-H1蛋白的表达及其意义。方法：用免疫组化留法检测84例大肠癌MTA1、nm23-H1蛋白的表达。结果：84例大肠癌中MTA1、nm23-H1阳性表达率分别为61．9％和51．2％;MTA1高表达与大肠癌组织分化程度、Duke’s分期和淋巴结转移关系密切（P〈0．05）;nm23-H1低表达与大肠癌组织分化程度、Duke’s分期和淋巴结转移关系密切（P〈0．05）;大肠癌中MTA1和nm23-H1蛋白表达呈负相关（P〈0．05）。结论：MTA1和nm23-H1蛋白表达与大肠癌分化程度、淋巴结转移和预后密切相关,可作为判断大肠癌患者转移复发的参考指标。     

肺癌组织中神经内分泌细胞的胚性重演

目的：检测肺癌组织神经内分泌细胞表达特征,方法：用组织化学和免疫组化染色检测70例人肺癌组织中分泌胃泌素释放肽（gastrin-releasing peptide,GRP),降钙素（Calcitonin,CT)及嗜铬素A（chromogranin A,CgA)神经内分 细胞的表达,结果：肺神经内分泌癌,腺癌,鳞癌及大细胞癌中神经内分泌细胞的阳性率分别为95％,55％,45％和50％,GRP阳性细胞在小细胞癌,低分化腺癌及鳞癌的表达高于高分化癌组织（P＜0．01）,CgA阳性细胞在类癌,高分化腺癌的表达高于低分化癌组织（P＜0．01）,结论：肺癌分化程度与神经内分泌细胞表达的 类有显著相关性,神经内分泌细胞在肺癌组织发生过程表现出胚性重演的特点,胎肺发育与肺癌发生在一定程度可能存在相同的调节因素。     

鼻咽癌P53和c-erbB-2蛋白的表达与临床分期和复发的关系

目的：探讨鼻咽癌（NPC）P53、c－erbB－2蛋白的表达与临床分期和复发的关系。方法：搜集NPC蜡块标本70例，应用免疫组化LSAB法，检测P53和c－erbB－2基因蛋白的表达，将其表达结果与NPC临床分期和复发的关系进行研究分析。结果：P53阳性表达率68．57％，其与颈淋巴结转移与否无关，但P53表达阳性者，其转移之颈淋巴结多小于4cm（P＜0．05）；Ⅲ、Ⅳ期P53阳性表达率较Ⅰ、Ⅱ期高（P＜0．05）；P53的表达与放疗后鼻咽局部复发和远处转移无关。c－erbB－2阳性率为84．29％，与NPC临床分期和复发无相关性。结论：P53蛋白在PNC病程的晚期表达较高，与转移之颈淋巴结大小有关。     

海南坡鹿生理生化正常值的研究

测定了海南坡鹿32项生理生化正常值．结果表明，除在成、幼鹿之间，体温、呼吸、脉搏、红细胞平均体积、红细胞计数、白细胞计数、血红蛋白、总蛋白、碱性磷酸酶、血清钙、血清纳差异极显著（P＜0．01），球蛋白、谷草转氨酶、谷丙转氨酶差异显著（P＜0．05）；在成年公、母鹿之间，除红细胞平均体积差异极显著（P＜0.01），红细胞压积容量、血清钙差异显著（P＜0．05）外，其余测定项目差异不显著（P＞0．05）．     

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.