胃癌与胃幽门螺杆菌关系的探讨

本文分析了胃癌与胃幽门螺杆菌(HP)的关系,结果表明胃癌组与胃癌相关性胃炎组(包括萎缩性胃炎伴肠化、萎缩性胃炎伴异型增生)之间具有显著性差异(P<0.05).提示HP的感染是胃癌的危险因素.     

萎缩性胃炎白细胞介素-1β水平和幽门螺杆菌感染的意义

目的探讨白细胞介素-1β(IL-1β)在萎缩性胃炎发病机制中的作用,以及IL-1β和幽门螺杆菌(HP)感染的关系.方法选择浅表性胃炎患者52例,萎缩性胃炎患者50例.试验分4组:A组:浅表性胃炎并HP阴性;B组:浅表性胃炎并HP阳性;C组:萎缩性胃炎并HP阴性;D组:萎缩性胃炎并HP阳性.采用酶联免疫吸附实验法(ELISA法)检测患者血清IL-1β水平,采用14C-尿素呼吸实验方法(14C-uBT)判定HP感染情况.结果萎缩性胃炎患者血清IL-1β水平均高于浅表性胃炎,尤其萎缩性胃炎伴HP感染阳性患者血清IL-1β水平升高明显,显著高于浅表性胃炎患者(P<0.01).与无HP感染的萎缩性胃炎患者相比,其血清IL-1β水平也明显升高(P<0.05).血清IL-1β水平在浅表性胃炎患者中有HP感染比无HP感染的患者也有升高趋势,但无显著性差异(P>0.05).结论在萎缩性胃炎的发病机制中IL-1β是关键的功能细胞因子,并可能是HP感染导致萎缩性胃炎的相关发病机制之一.     

幽门螺杆菌感染与胃粘膜肠化生的关系

为探讨Hp 感染与胃粘膜肠化生及其增殖状态分型、硫酸化粘液分泌状况的关系,采用甲苯胺蓝染色法检测2 800 例胃粘膜活检组织及外科手术标本中Hp 的感染,并对187 例伴肠化生慢性萎缩性胃炎作免疫组化与粘液组化套染,进行肠化生增殖状态分型。结果显示胃粘膜出现肠化生和萎缩、癌变时,Hp 的检出率显著降低;Hp 感染与肠化生细胞是否分泌硫酸粘液无关;高增殖型肠化生中Hp 的检出率显著高于中、低增殖型。提示Hp 感染不仅在肠化生的发生中起作用,而且对肠化生细胞的增殖起促进作用,促进肠化生向异型增生过渡。     

胃粘膜活检切片中幽门螺杆菌感染的临床病理分析

探讨幽门螺杆菌（Hp)与胃粘膜病变的相互关系。应用Giemsa染色和Warthin-Starry染色方法检测645例胃粘膜活检标本中的Hp,总检出率为64．65％，其顺序为慢性浅表性胃炎＜慢性萎缩性胃炎＜胃溃疡＜胃癌。Hp感染与胃炎萎缩性，活动性，伴肠化生，腺上皮不典型增生，淋巴滤泡形成显著相关（P＜0．01）。故认为Hp感染可导致胃粘膜萎缩，肠化生，不典型增生，并与胃癌发生有关。     

GagA^＋幽门螺杆菌与胃粘膜病理变化的关系

幽门螺杆菌（Helicobacter pylori．Hp）感染与慢性胃炎、消化性溃疡及胃癌的发生密切相关，研究认为Hp的毒力基因cagA与Hp的致病密切相关。CagA^＋Hp也是癌前病变萎缩性胃炎、肠上皮化生和异型增生的重要病因和促进因子，可增加胃癌发生的危险性。我们子2005年在胃癌高发区兰州地区开展了^14C—UBT和血清Hp-CagA抗体测定及胃粘膜组织病理学检查。旨在探讨CagA^＋Hp感染与胃粘膜肠上皮化生、异型增生及胃癌发生的关系。发现CagA^＋Hp具有较强的促进胃粘膜萎缩、肠型化生和异型增生作用，感染CagA^＋Hp可能是胃癌发生的危险因素之一。     

CagA+幽门螺杆菌与胃粘膜病理变化的关系

幽门螺杆菌(Helicobacter pylori,Hp)感染与慢性胃炎、消化性溃疡及胃癌的发生密切相关,研究认为Hp的毒力基因CagA与Hp的致病密切相关.CagA Hp也是癌前病变萎缩性胃炎、肠上皮化生和异型增生的重要病因和促进因子,可增加胃癌发生的危险性.我们于2005年在胃癌高发区兰州地区开展了14C-UBT和血清Hp-CagA抗体测定及胃粘膜组织病理学检查,旨在探讨CagA Hp感染与胃粘膜肠上皮化生、异型增生及胃癌发生的关系.发现CagA Hp具有较强的促进胃粘膜萎缩、肠型化生和异型增生作用,感染CagA Hp可能是胃癌发生的危险因素之一.     

中医络病辨治慢性萎缩性胃炎37例

<正>慢性萎缩性胃炎(CAG)是消化系统的常见病、多发病。本病目前国内外尚无特殊有效的治疗方法,少数患者伴肠上皮化生及异型增生有癌变可能。笔者近五年经治的37例CAG中,从中医络病辨治,以张锡纯活络效灵丹加减为基本方,并据辨证施治原则,将其分为五型,疗效尚为满意,兹小结如下。 1 临床资料 1.1 一般资料 本组37例患者性别:男性28例,女性9例;年龄:23～30岁6例,31～50岁19例,50～     

CagA+幽门螺杆菌与胃粘膜病理变化的关系

幽门螺杆菌(Helicobacter pylori,Hp)感染与慢性胃炎、消化性溃疡及胃癌的发生密切相关,研究认为Hp的毒力基因CagA与Hp的致病密切相关.CagA+Hp也是癌前病变萎缩性胃炎、肠上皮化生和异型增生的重要病因和促进因子,可增加胃癌发生的危险性.我们于2005年在胃癌高发区兰州地区开展了14C-UBT和血清Hp-CagA抗体测定及胃粘膜组织病理学检查,旨在探讨CagA+Hp感染与胃粘膜肠上皮化生、异型增生及胃癌发生的关系.发现CagA+Hp具有较强的促进胃粘膜萎缩、肠型化生和异型增生作用,感染CagA+Hp可能是胃癌发生的危险因素之一.     

幽门螺杆菌与胃粘膜肠化生关系的探讨

通过对1254例胃部疾患病人中的255例胃粘膜肠化生病人的回顾性研究发现，幽门螺杆菌（HP）阳性及肠化生在发病年龄上大于55岁者较小于55岁老常见，HP阳性患者肠化生发生率显著高于HP阴性患者。表明HP感染与胃粘膜肠化生二者之间存在着相关性。     

清除幽门螺杆菌可有效降低胃癌发病率

北京大学临床肿瘤学院游伟程研究小组历经10年研究证实,清除胃内幽门螺杆菌感染,可使胃癌癌前病变及胃癌的发病风险降低40％。这是目前世界上针对胃癌癌前病变开展的干预试验中样本量最大、时间最长的研究,具有系统性和原创性,在国内外肿瘤研究中尚属首次,为胃癌的预防奠定了理论基础,提供了重要科学依据。研究小组采用大样本和前瞻性研究方法．在山东临朐县胃癌高发区对3400名成人开展了研究。研究表明,幽门螺杆菌感染是胃癌发生的重要危险因素,清除幽门螺杆菌感染能有效降低慢性萎缩性胃炎、肠上皮化生、异型性增生等癌前病变及胃癌的发生。与安慰剂组比较。清除幽门螺杆菌组发生上述癌前病变和胃癌的危险度下降40％。研究还证实血清高水平VC能阻止癌前病变的进展,是降低胃癌危险性的保护性因素。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

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。     

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.     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

正~~     

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