43例妊娠妇女血清贫血检测指标的分析

检测了血清铁（SerumIron）、铁蛋白（Ferritin）和可溶性转铁蛋白受体（Soluble transferrin receptor,sTfe）等指标,并分析了这些指标在诊断妊娠妇女缺铁性贫血中的临床意义。采用免疫分析法和比色法测定43例妊娠24—28周妇女和同期收集的30例健康妇女的血清铁、铁蛋白和可溶性转铁蛋白受体的水平,利用SPSS10．0软件对实验数据进行统计学分析。妊娠组血清铁、可溶性转铁蛋白受体均值较正常对照组无显著差异,铁蛋白均值为19．62±11．52ng／L,明显低于对照组61．14±39．92ng／L（P〈0．05）。按血红蛋白浓度的高低分为4组：1组为Hb〈100g／L,2组为Hb100～110g／L,3组为Hb110—120g／L,4组为Hb〉120s／L。1组只有铁蛋白与对照组有显著差别（P〈0．05）,2组铁蛋白、VitB13和转铁蛋白受体与对照组均有显著差别（P〈0．05）,3组和4组铁蛋白和VitB13与对照组有显著差别（P〈0．05）。在诊断妊娠妇女缺铁性贫血中,铁蛋白是估计人体铁状态的最好参数,可溶性转铁蛋白受体测定在怀孕期间没有显著变化,如有功能性铁缺乏会出现sTfe浓度升高。而血清铁是检测缺铁及铁负荷过多疾病的有效指标,但在一定时期内表现不明显,变化不大。     

维生素A缺乏对大鼠生长发育及铁吸收的影响

目的研究维生素A(VA)缺乏对生长期大鼠生长发育及铁吸收的影响.方法将52只雄性SD大鼠,21日龄,按体质量随机分为4组,每组13只,Fe及VA正常对照组(Ⅰ组),Fe正常VA完全缺乏组(Ⅱ组),Fe正常VA轻度缺乏组(Ⅲ组),Fe和VA轻度缺乏组(IV组).实验动物喂饲8周,实验期末,进行72 h代谢实验,记录大鼠的进食量,并收集粪便.代谢实验结束后,处死大鼠,测定血清VA、粪铁含量,计算铁表观吸收率.结果各组动物除Ⅱ组动物性情暴躁、易激惹外,一般状况良好,维生素A缺乏可以使大鼠铁表观吸收率下降(P<0.05).结论维生素A缺乏可能通过影响铁吸收来影响体内铁的营养状况.     

补铁与心血管疾病

铁是人体内重要的无机盐离子，主要以血红蛋白（Hb)的形式贮存于红细胞中，铁的缺乏易导致缺铁性贫血，影响人体机能及运动能力，然而过量的补铁却与人心血管病的发生有一定的关联，因此在补铁问题上也存在诸多的争论，文章就此问题展开讨论并提出建议。     

高效液相色谱和原位荧光法比较研究威氏海链藻光合色素组成

采用高效液相色谱(HPLC)和活体荧光方法研究了威氏海链藻(Thalassiosira weissflogii)在不同营养状态下其色素比值的变化．结果显示氮(N)限制相对磷(P)限制对威氏海链藻生长有更大的抑制作用．HPLC的结果显示在氮限制条件下，细胞的墨角藻黄素(Fucoxanthin)／叶绿素a、叶绿素c／叶绿素a比值高于磷限制和未受营养盐限制条件(对照组)；活体荧光结果则显示氮限制条件下550nm／440nm，460nm／440nm激发荧光比值低于磷限制和对照组．这两种方法来指示浮游植物的生理状态以及研究其类群结构存在一定差异，综合比较和评价这两种方法在指示浮游植物生理状态及类群结构中各自的优越性，结果表明活体荧光能明显地指示威氏海链藻细胞生长状态的变化，比较适宜用于指示不同生理状态下威氏海链藻的光合色素比值变化，而用HPLC来研究营养限制条件下威氏海链藻细胞的生长变化以及计算其类群的组成较为合适．     

宝宝添辅食为何不宜吃蛋白

婴儿半岁前生长极快，体重增长速度可超过出生时体重的两倍。出生时从母体中得到的那点铁质几乎消耗得差不多了。为了防止贫血，需补充更多的铁质。4～6个月的婴儿仍以母乳喂养为主，但奶水中几乎不含铁。蛋黄富含铁，对于这个月龄的婴儿来说．是最理热的供铁食物。及时补充蛋黄，能够有效地防止营养性缺铁性贫血的发生。     

猪胰铁蛋白释放铁和磷酸盐的动力学特性

猪胰铁蛋白（pig pancreas ferritin，PPF）铁核由179 phosphate／PPF和1698 Fe^3＋／PPF组成，平均磷铁比值为1：9．5．PFF铁核表层由较高的磷铁比组成．选用电子光谱技术研究PPF释放铁和磷酸盐全过程，发现PPF以两种不同速率途径释放铁与磷酸盐．在弱酸条件下，PPF释放铁的速率明显高于在弱碱条件下的速率，证实PPF蛋白壳的柔性调节能力强弱是控制释放铁和磷酸盐速率的重要因素之一．     

川芎嗪调控哮喘大鼠气道中VEGF和iNOS表达对气道重塑的影响

目的深讨川芎嗪调控哮喘大鼠气道中血管内皮细胞生长因子（VEGF）和诱导型一氧化氮合酶（iNOS）表达对气道重塑的影响。方法将30只Wistar雄性大鼠中按随机数字表分为3组，每组10只。对照组分别于第0、7和14天腹腔注射生理盐水2ml，分别于第加～29，47，61，73～75天用37℃生理盐水雾化吸入，1次／d，10min／次；哮喘组用卵蛋白粉（OVA）10mg、氢氧化铝20mg制成2ml悬液代替生理盐水，余同对照组；干预组于雾化吸入前1h腹腔注射川芎嗪2mg，余同哮喘组。末次激发24h后行肺泡灌洗，回收肺泡灌洗液（BALF），测VEGF和iNOS的浓度。取右下肺组织切片作常规HE染色，测定气道内周径（Pi），外周径（Pe），并计算管壁面积（WA），气道平滑肌面积（SMC—A）。结果哮喘组气道中VEGF与iNOS浓度、WA／Pi和SMC—A／Pi比值明显高于对照组（P〈0．05）；干预组气道中VEGF与iNOS浓度、WA／Pi和SMC—A／Pi比值明显高于对照组（P〈0．05），但明显低于哮喘组（P〈0．05）。VEGF和iNOS浓度与WA／Pi和SMC—A／Pi比值作相关分析均呈正相关性。结论川芎嗪可能通过下调哮喘大鼠气道中VEGF和iNOS表达，抑制气道重塑。     

小鼠生长期富铁干预对成年期铁代谢影响的初步研究

采用动物实验的方法,探讨幼鼠在生长期经受富铁干预后对成年期铁代谢的影响,以验证我们提出的假说儿童生长期缺铁是人类长期进化过程中形成的,不应采用铁强化的面粉或食品的方式干预。本实验的初步结果是1)小鼠生长期存在缺铁状态,但经富铁干预与否,两组成年鼠的血液学参数并无差异;2)两组成年鼠同时转为贫铁饲养后,原富铁干预组发生贫血的时间反而早于对照组。初步结果支持我们提出的假说。     

小鼠生长期富铁干预成年期铁代谢影响的初步研究

采用动物实验的方法，探讨幼鼠在生长期经受富铁干预后对成年期铁代谢的影响，以验证我们的提出的假说：儿童生长期缺铁是人类长期进化过程中形成的，不应采用铁强化的面粉或食品的方式干预。本实验的步结果是：1）小鼠生长期存在缺铁状态，但经富铁干预与否，两组成年鼠的血液学参数并无差异；2）两组成年鼠同时思为贫铁饲养后，原富铁干预组发生贫血的时间反而早于对照组，初步结果支持我们提出了假说。     

性激素诱导大鼠前列腺增生的体视学研究

用Ｗｉｓｔｅｒ雄性大鼠５０只，做双侧睾丸摘除术后分别投以不同比例的雌二醇（Ｅ２）和睾丸酮（Ｔ），以定量组织学方法观察大鼠前列腺腹叶纤维基质与腺实质的变化，探讨雌激素与雄激素比值的改变对大鼠前列腺腹叶的影响，结果表明：在Ｅ２／Ｔ为１：５０至１：２００时所处理大鼠间质增生显著（Ｐ〈０．０５），腺实质之变化无统计学意义。     

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).     

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.     

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.