火焰原子吸收法快速测定芦荟中的钙铁元素

用悬浮液技术处理样品制成琼脂悬浮液,建立了快速测定芦荟中钙、铁的火焰原子吸收法.用La3 作为钙的释放剂以消除化学干扰;考察了悬浮液稳定时间,化学干扰,试液与空白溶液粘度的一致性,背景吸收干扰及检出限.结果表明,在试液中加入适量盐酸溶液,可显著提高铁的吸光度,RSD<3.2%,测定结果与灰化法一致,相对误差小于±0.9%.     

悬浮液技术-FAAS法测定蝉蜕中钙锰锌

以悬浮液技术处理样品,用火焰原子吸收光谱法成功地测定了蝉蜕中的钙、锰、锌.实验表明,加入适量盐酸可显著提高被测元素的吸光度;共存元素对钙、锰有化学干扰,以La3 和磺基水杨酸分别作为钙、锰的释放剂.对样品悬浮液的稳定时间、试液与空白溶液粘度的一致性、背景吸收干扰及特征浓度进行了考察.样品测定的相对标准偏差小于0.9%,测定结果与灰化法一致,相对误差小于±1.5%.     

悬浮液技术--FAAS法测定甘薯及马铃薯中钙镁

用悬浮液技术处理样品制成琼脂悬浮液,以火焰原子吸收法成功地测定了甘薯及马铃薯中钙、镁.用La3+作为释放剂以消除化学干扰.通过在样品悬浮液及与空白溶液中加入适量琼脂溶液,可配制成与试液粘度一致的参比溶液.对背景吸收干扰、检出限及特征浓度进行了考察.测定结果的相对标准偏差小于2.3%,测定结果与灰化法一致,相对误差小于±2.1%.     

悬浮液技术-火焰原子吸收光谱法测定猪肝及猪肾中铁锌

以悬浮液技术处理样品,用火焰原子吸收谱法成功地测定了猪肾及猪肝中的铁、锌.试验表明,加入适量盐酸可显著提高被测元素的吸光度.对样品悬浮液稳定时间、盐酸溶液(1+1)用量、试液与空白溶液粘度的一致性、背景吸收干扰进行了考察.测定结果的相对标准偏差小于2.5%,测定结果与灰化法一致,相对误差小于±1.9%.用悬浮液技术取代灰化法处理猪肾及猪肝样品,以FAAS法测定铁、锌是可行的,方法简便.     

火焰原子光谱法快速测定指甲中的钙镁钾

建立了非完全消化-火焰原子光谱法快速测定指甲中钙、镁、钾的分析方法。在低温下用浓硝酸消解样品,可获得均匀、透明的样品溶液。用发射法测定钙、钾,以吸收法测定镁。以Sr2+作为钙的释放剂及钾的消电离剂。对样品处理条件、化学干扰、试液与空白溶液粘度一致性、背景吸收干扰及检出限进行了考察。测定结果的相对标准偏差小于2.2%,测定结果与灰化法一致,相对误差小于±1.2%。方法简便、准确。     

火焰原子吸收光谱法快速测定柞蚕蛹中微量元素

用非完全消化法处理样品,建立了快速测定柞蚕蛹中钙、镁、铁、锌的火焰原子吸收分析法,用La~(3+)作为释放剂以消除共存元素对钙、镁的化学干扰,实验结果表明,试液的物理性质与其空白溶液的一致,无背景吸收干扰,对样品处理条件、吸光度重复性及检出限进行了考察,测定结果的相对标准偏差小于2．9%,加标回收率95．6%～104．1%,本方法测定结果与灰化法一致,相对误差小于±2．5%．     

消解乳化技术-火焰原子光谱法测定天然橡胶中微量元素

在低温下用浓硝酸消解天然橡胶样品,以甲基异丁基酮溶解消解产物,并制成乳浊液.加入氯化锂溶液作为钠、钾的消电离剂及加入La3 作为钙、镁的释放剂.用火焰原子发射光谱法测定钠、钾、钙,以火焰原子吸收光谱法测定镁.建立了消解乳化技术-火焰原子光谱法测定天然橡胶中钠、钾、钙、镁的分析方法.对消解产物的溶解性质、溶剂及乳化剂的选择、试液与空白溶液物理性质的一致性,背景吸收干扰及检出限进行了考察.测定结果的相对标准偏差小于3.7%,加标回收率96.7%～104.7%.     

FAAS法测定花生及杏仁中钙镁锌

用非完全消化法处理样品,即在低温下用高氯酸-硝酸(1∶3)混合酸消解花生及杏仁样品,再用乳化剂TritonX-100溶解未消解的油脂而配制成透明的草绿色样品溶液,建立了快速测定花生及杏仁中钙、镁、锌的火焰原子吸收分析法.分别用La3+,Sr2+作为钙、镁的释放剂以消除共存元素的化学干扰.在测定花生中镁时,需使用氘灯以扣除背景吸收.实验表明试液的物理性质与空白溶液一致,测定结果的相对标准偏差小于2.1%.本方法测定结果与灰化法一致,相对误差小于±4.0%.     

火焰原子吸收法快速测定鸡肉中的镁锌

用悬浮液技术处理鸡肉样品,将样品粉碎、过筛,制备成琼脂悬浮液,用火焰原子吸收法成功地测定了鸡肉中的镁和锌,对琼脂溶液用量及检出限进行了考察.实验表明,样品中的共存元素对镁无化学干扰,试液的粘度与空白溶液的一致,不存在背景吸收干扰.本方法的相对标准偏差小于2.1%,测定结果与灰化法一致,相对误差小于±2.6%.     

连续光源原子吸收光谱法测定婴幼儿奶粉中的微量金属元素

本文以婴幼儿奶粉为研究和实验的对象,利用连续光源原子吸收光谱法,通过测试奶粉中钾、钠、钙、锌、铁、镁六元素,详细的介绍了高分辨率连续光源原子吸收光谱仪(HS-CS-AAS)的实验用具、实验过程和实验效果,总结了原子吸收光谱法的分析特点,同时通过与GBW08509脱脂奶粉成分分析标准物质作比对,并利用HS-CS-AAS测定了婴幼儿奶粉中钾、钠、钙、锌、铁、镁6种重要金属元素。此次实验的结果表明,国家标准物质和奶粉中钾(K)、钠(Na)、钙(Ca)、锌(Zn)、铁(Fe)、镁(Mg)的测定均获得满意结果。     

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.     

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.     

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.     

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。     

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

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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     

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