原子吸收法对藏草药免耳草中12种元素的初级形态分析

用原子吸收分光光度法,测定了产于青藏高原的藏草药兔耳草的全药材、水提液、醇提液中12种元素(cr、Cu、Fe、Mn、Ni、Se、Zn、K、Ca、Mg、Cd、Pb)的含量,以及水提液中各元素可溶态、水溶态的含量,同时采取正辛醇-水分配体系模拟藏药水提液中各微量元素在人体胃肠中的分配情况,对藏药中微量元素的初级形态进行了分析,初步探讨了酸度变化(人体胃肠酸度)对微量元素的影响,结合藏药药效讨论其相关性,为进一步研究微量元素与藏药药性、药效的关系提供科学的依据和奠定基础.     

呼和浩特市和林格尔地区沙棘生化成分分析

对呼和浩特市和林格尔地区沙生植物沙棘中所含的常量元素、微量元素和17种氨基酸进行测定．结果表明，沙棘中的常量元素Ca、K、Na、Al、Mg在植株各部分中的含量顺序相同，皆为Ca〉K〉Na〉AE〉Mg；Fe、Mn、Cu、Zn4种植物所必需的微量元素含量顺序存在差异，表现为根：Fe〉Mn〉Cu〉Zn，主干：Fe〉Cu〉Mn〉Zn，侧枝：Fe〉Mn〉Cu〉Zn；沙棘中人体必需的7种氨基酸含量均较高．含量顺序为侧枝〉根〉主干．     

芦柑果皮和果肉中微量元素比较

南方富产大量的芦柑,实验结果表明:芦柑果肉和果皮中富含对人体有益的微量元素Cu、Fe、Mn、Se、Zn、K、Ca和Mg.其中Cu、Fe、Mn、Se和Zn等的元素含量范围在3.62～30.74μg.g-1,Mg、Ca和K三元素的含量范围在9.46～34.40mg·g-1.微量元素含量大小顺序为:K>Ca>Mg>Se>Mn>Fe>Zn>Cu.比较果皮和果肉中元素含量,Cu、Fe和Mn的含量果皮低于果肉,Se、Zn、K、Ca和Mg等元素的含量超过果肉.Se、Zn和Mg的含量果皮是果肉的1.12～1.17倍,K和Ca的含量果皮尤其高,分别是果肉的2.81和5.55倍.通过水泡制芦柑皮,得出元素浸提最佳温度为80℃,时间30min.元素浸提率为5.01%～97.70%.K、Ca和Zn浸提率为5%～7%,Se、Mn和Mg浸提率为20%～30%,Cu和Fe浸提率尤其高,分别为95.02%和97.70%.日常饮用水泡制芦柑皮是补充人体所需微量元素的好方法.研究为芦柑皮应用开发提供了科学依据.     

日光温室甜樱桃叶片中矿质营养元素含量的动态变化

以红灯(Prunus L.)品种为试材,研究了温室栽培樱桃叶片中7种矿质营养元素(Cu,Zn,Fe,Mn,Ca,Mg,K)含量的动态变化及其相关性.结果表明:开花期至果实成熟期,樱桃叶片中Cu,Zn含量显著下降;Fe,Mn,Ca,Mg,K含量显著增加.果实采后生长发育阶段,Fe元素含量极显著下降且略有回升,其他6种元素变化平缓(或增加或下降).Cu与Mn,Zn元素分别呈极显著负相关和正相关;Ca与Mn和Cu,Zn元素分别呈极显著正相关和负相关;K,Mg元素与Cu元素呈显著和极显著负相关,与Mn,Fe,Ca,Mg元素呈显著或极显著正相关.     

大熊猫毛发微量元素初析

用原子吸收分光光度法测定了四川野外和人工饲养的六十一头大熊猫毛发中 Zn、Cu、Mn、Fe、Ca、Mg 等六种元素的含量。看出:不同部位、不同颜色、根和稍部的微量元素含量都存在着某些差异;雄性和雌性的毛发中 Mn、Ca、Mg 存在着显著性差异;野外大熊猫毛发的六种元素含量高于人工饲养的大熊猫含量。     

野生毛樱桃生长期矿质营养含量变化与果实生长的关系

研究了野生毛樱桃生长期果实生长与叶果中7种矿质营养元素(Cu,Zn,Fe,Mn．Ca,Mg,K)的含量变化及其相关关系。结果表明,果实中Cu,Zn,Fe,Mn,Ca,Mg元素含量与果实生长呈负相关,其中Zn,Mg元素达显著水平;叶片中Cu,Zn,Fe,Mn,K元素含量与果实生长呈负相关,其中K元素达显著水平．叶片中Ca,Mg元素与果实生长呈正相关,其中Ca元素达显著水平。果实中各营养元素(除K外)生长期变化相互间均达极显著正相关。叶片中Ca与Mg元素呈极显著正相关;Zn,K均与Ca,Mg元素呈极显著负相关;Cu与Ca元素呈显著负相关;K与Zn,Cu元素呈显著正相关;Zn与Cu,Mn元素均呈显著正相关。叶片和果实中矿质营养元素间相关性均不显著。     

云南拉祜族人发中几种金属元素含量的测定

用原子吸收分光光度法测定了云南拉祜族人群发中Ca、Mg、Fe、Cu、Zn、Mn等几种元素的含量,测定结果拉祜族人发中Ca、Mg含量均值比纳西族、普米族、白族高,Zn稍低,Cu、Fe、Mn无显著差异.     

贵州钩藤不同产地钧、茎微量元素比较分析

为了解贵州不同产地钩藤不同部位主要微量元素的含量,采用电感耦合等离子体质谱仪(ICP-MS),对采自贵州剑河、都匀钩藤样品进行钩、茎微量元素(Na、Mg、K、Ca、Mn、Fe、Co、Zn、Cu、Mo)含量测定分析。结果表明:剑河钩藤钩、茎中Na、Mg、K、Ca、Fe、Zn、Cu、Mo含量均高于都匀钩藤钩、茎中含量。Zn/Cu比大小顺序均为茎钩和茎钩,都匀钩藤钩、茎、钩和茎中Zn/Cu比均高于剑河钩藤对应部位的Zn/Cu比。不同产区钩藤间Mn和Mg,Mn和Ca、Fe和K、Zn和Mg、Zn和Ca、Cu和Na、Cu和Na、Mo和Fe(p0.05)显著正相关,K和Na、Ca和Mg、Cu和K、Cu和Fe(p0.01)极显著正相关。     

三种藻类食物中矿物元素含量测定与分析

用微波消解,电感耦合等离子体发射光谱法测定螺旋藻、海带和紫菜中的金属元素。实验结果表明,三种藻类食品中含有丰富的Ca、Mg、Al、Ba、Fe、Zn、Cu、Ni、Mn、Cr、等金属元素。对比发现,螺旋藻中Fe、Zn、Cu、Cr四种人体所需的微量元素的含量远远高于海带和紫菜。海带中Ca、Mg元素的含量最高,紫菜中Mn元素的含量最高。研究表明成人每人每天只需食用55 g螺旋藻,130 g海带或150 g紫菜就能满足人体对Ca、Mg、Fe、Zn、Cu、Mn、Cr几种人体必须矿物质的需求。用ICP-AES法测定藻类食品中的金属元素,方法操作简单,分析速度快,准确度高。     

远志炮制前后微量元素的含量测定

以远志和蜜远志中微量元素为研究的基础和出发点,对远志和蜜远志中微量元素进行含量测定,通过比较阐述了远志炮制前后微量的含量变化与微量元素和药性理论、主治功效的相关性;对远志进行蜜炙加工后,采用湿法消化法消解样品,用火焰原子吸收光谱法测定生品和蜜制品中Fe、Cu、Zn、Mn、Ca、Mg6种微量元素的含量;生远志中Fe、Cu、Zn、Mn、Ca、Mg的含量分别为154.1802μg/g、7.7033μg/g、21.6191μg/g、177.4323μg/g、92.6612μg/g、18.2650μg/g,蜜远志中Fe、Cu、Zn、Mn、Ca、Mg的含量分别为117.4652μg/g、192.5411μg/g、20.0864μg/g、16.5451μg/g、78.5081μg/g、8.4723μg/g、远志经过炮制后,Fe、Zn、Mg、Mn、Ca的含量均下降,Cu含量略微上升。各元素的精密度在0.4%~2.1%之间,加样回收率在98.83%~103.24%。     

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).     

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.