高尿酸血症及尿酸性肾病动物模型的建立及应用

为建立高尿酸血症及尿酸性肾病动物模型 ,以不同剂量腺嘌呤分别饲喂大鼠 ,并设别嘌呤醇作为治疗组 ,监测血尿酸、尿尿酸及肾功能变化 ,并进行肾组织病理形态学及超微结构观察。结果示中剂量组大鼠于实验第三天血尿酸水平升高 ,可持续一周。第十天出现肾功能损害 ,并可见间质性肾炎改变。别嘌呤醇组改变不明显。中剂量组大鼠可作为观察药物预防作用的高尿酸血症及尿酸性肾病动物模型     

瑞舒伐他汀钙干预对高尿酸血症所致大鼠内皮功能紊乱的影响

 为探讨瑞舒伐他汀钙(rosuvastatin)对高尿酸血症大鼠模型及其内皮功能紊乱的影响,将72只Sprague-Dawley(SD)雄性大鼠随机分组,采用酵母膏和氧嗪酸钾腹腔注射方法,建立高尿酸血症动物模型.设别嘌呤醇干预为阳性对照,以2.5、5.0和10.0mg瑞舒伐他汀钙/kg剂量干预动物模型,采用专用试剂盒测定尿酸(UA)、一氧化氮(NO)、内皮素-1(ET-1)、血管紧张素II(AngII)的血清水平,免疫组织化学鉴定主动脉组织的一氧化氮合酶(eNOS)蛋白质表达水平变化.结果显示,与对照组比较,高尿酸血症动物模型组血清UA、ET-1和AngII显著升高,血清NO降低,主动脉内皮组织eNOS表达水平降低.瑞舒伐他汀钙干预动物模型后发现,随着药物剂量和干预时间的增加,该药改善以上内皮功能紊乱相关的指标,使之逐渐恢复至正常水平,当瑞舒伐他汀钙干预剂量为10mg/(kg·d)和干预6周时,与非药物干预的模型组有显著差异,其改善内皮功能效果明显高于嘌呤组(阳性对照组).由此表明,瑞舒伐他汀钙通过升高血清中NO和eNOS的蛋白表达,降低血浆ET-1及AngII,从而改善高尿酸血症大鼠的血管内皮功能,并且该作用呈剂量依赖性.     

腺嘌呤和氧嗪酸制作高尿酸血症大鼠模型比较

目的 比较腺嘌呤和氧嗪酸制作的高尿酸血症大鼠模型,探讨如何建立持续性高尿酸血症大鼠模型。方法分别采用腺嘌呤、氧嗪酸高、低剂量灌胃,测定血清尿酸、尿素氮、肌酐,与对照组比较,并进行肾组织病理观察。结果腺嘌呤组肾损害严重,且肾损害早于血尿酸的增高。而氧嗪酸组血尿酸明显、持续的升高,且较长时间无明显肾损害。结论腺嘌呤只适合制作肾衰大鼠模型,而氧嗪酸用于制作高尿酸血症大鼠模型较为合适。     

加味四妙胶囊抗痛风性关节炎实验研究

目的探讨加味四妙胶囊抗痛风性关节炎的作用.方法小鼠腹腔一次性注射氧嗪酸钾混悬液,制备小鼠高尿酸血症模型,检测血尿酸水平;采用尿酸钠诱导的小鼠痛风性关节炎模型,观察加味四妙胶囊对小鼠血尿酸及关节肿胀度的影响.结果与模型组比较,加味四妙胶囊对氧嗪酸钾引起的小鼠血尿酸升高有一定的抑制作用,可显著抑制尿酸钠诱导的小鼠关节肿大.结论加味四妙胶囊在小鼠动物实验中可降低血尿酸水平,对痛风性关节炎有一定的治疗作用.     

糖尿病肾病血尿酸水平的变化及意义

目的 探讨糖尿病肾病与血尿酸水平的关系.方法 对80例糖尿病患者,其中合并肾病者44例,以及30例健康对照者检测血尿酸、血尿素氮和血肌酐,进行统计分析.结果 糖尿病组与对照组,糖尿病肾病组与糖尿病无肾病组比较血尿酸水平均显示有显著差异(P＜0.001).糖尿病肾病组肾功失代偿者血尿酸水平高于肾功代偿者(P＜0.001).结论 糖尿病肾病与血尿酸水平显著相关,随肾功损害的加重而增高,二者互为因果,所以防治糖尿病肾病,应重视控制高尿酸血症.     

富金花茯散茶对高尿酸血症小鼠的影响

研究富金花茯散茶对氧嗪酸钾致高尿酸血症小鼠的尿酸代谢与相关酶活性的影响．将60只雄性KM种小鼠随机分为空白组、模型组、阳性药组（别嘌呤醇）、茯茶低剂量组（125mg／kg）、茯茶中剂量组（250mg／kg）、茯茶高剂量组（500mg／kg）．连续灌胃7d后腹腔注射氧嗪酸钾（300mg／kg）造模,空白组注射等量蒸馏水．采样后测定小鼠血尿酸（UA）、肝脏黄嘌呤氧化酶（XOD）、腺苷脱氨酶（ADA）活性造模后,茯茶高剂量组血尿酸浓度较对照组降低35．2％（P〈0．05）,肝脏XOD及ADA活性抑制率显著,XOD活性降低38％（P〈0．05）,ADA活性降低53．8％（P〈0．05）．富金花茯散茶对氧嗪酸钾导致的高尿酸血症有明显的改善作用,其作用机制与其抑制肝脏XOD、ADA活性有关．     

大鼠高尿酸血症模型的建立

目的建立大鼠高尿酸血症动物模型。方法采用腺嘌呤、腺嘌呤加酵母、腺嘌呤加乙胺丁醇和氧嗪酸钾盐不同剂量口服灌胃,测定实验前后大鼠血清尿酸、尿素氮、肌酐,并进行组织学病理切片观察。结果氧嗪酸钾尿酸升高平稳,并且对肾损伤不严重。结论用氧嗪酸钾建立大鼠高尿酸血症模型较合适。     

高校职工高尿酸血症患病状况及相关因素分析

目的:为了了解高校教职工高尿酸血症患病状况,分析高尿酸血症与超重肥胖及血压、血糖、血脂的关系.方法:通过对2016年在民族高校体检的20-90岁1029例(男442例,女587例)人群进行体格检查及血生化检测,男性血尿酸420umol/L,女性360umol/L为高尿酸血症(HUA),统计不同年龄组不同性别高尿酸血症患病率,分析高尿酸血症与超重肥胖相关性以及高尿酸血症与血脂、血糖、血压等不同代谢指标的相关性.结果:(1)该人群高尿酸血症患病率15.45%,男22.85%,女9.88%,男性高尿酸血症患病率高于女性.(2)随着体重指数(BMI)增加,高尿酸血症患病率明显升高.(3)高尿酸血症组比正常尿酸组BMI、血脂、血糖及血压紊乱均高.BMI及甘油三酯(TG)明显升高.结论:高校高尿酸血症患病率高,年龄性别差异影响高尿酸血症,高尿酸血症人群肥胖、血脂异常、高血糖、高血压的发生率明显增加.     

电针治疗痛风性急性关节炎及对血尿酸的影响

目的探索电针治疗痛风性急性关节炎及对血尿酸的影响。方法将90痛风性急性关节炎患者随机分为3组，电针组30例，别嘌呤醇组30例，丙磺舒组30例，观察3组对血尿酸的影响。结果电针组、别嘌呤醇组、丙磺舒组3组治疗后和治疗前血尿酸比较，差异有显著性（P〈0．01）；电针组和别嘌呤醇组治疗后血尿酸比较，差异无显著性（P〉0．05）。结论电针能减少尿酸的生成，是治疗痛风性急性关节炎的作用机理之一。     

不同中药组方对高尿酸血症大鼠的影响

研究不同中药组方对血尿酸及相关代谢指标水平的影响.将大鼠随机分为10组:模型对照组,阳性对照组,中药组方A、B、C、D高、低剂量组,利用氧嗪酸钾构建大鼠高尿酸血症模型,分别给药30 d.给药27 d后测定部分大鼠血清尿酸,以确定造模成功与否及样品是否有疗效.给药30 d后全部动物测定血糖(GLU)、总胆固醇(CHOL)、甘油三酯(TG)、尿素(UREA)、肌酐(CREA)、尿酸(UA)、肾脏指数等指标.与模型组比较,给药27 d后各样品组动物血清尿酸浓度均有所降低;给药30 d后,A、B、C样品高、低剂量组均能降低高尿酸血症模型大鼠的血尿酸水平;给药30 d后,各样品组GLU、CHOL、TG、UREA、CREA等指标水平均无明显变化;给药30 d后,A、B、C各样品高剂量组均能明显降低高尿酸血症模型大鼠的肾脏指数.A、B、C组样品均能降低高尿酸血症大鼠血尿酸水平,初步印象其对肾脏具有一定的保护作用.     

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.     

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…     

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

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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。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

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