AAS测定不同产地甘草的元素含量

试验中对样品进行了严格的处理采用火焰原子吸收光谱法对不同产地的甘草进行元素测定,得出不同产地甘草最优的生长环境和利用价值.实验中以甘肃、内蒙古、山西三个产地的甘草为原料,用干法灰化及湿法消解的前处理方法,用火焰原子吸收光谱法对其所含的Fe、Mn、Ga、Zn、Cu、Mg六种元素进行测定.研究了干法灰化法工艺中不同产地原料、灰化时间、灰化温度、原料试样质量4个因素和湿法消解工艺中不同产地原料、混酸种类、混酸体积、原料试样质量4个因素对元素含量测定的影响.通过正交试验设计方法确定最佳测定元素含量的最优工艺条件.     

人工栽培细茎石斛中微量元素含量研究

目的：对人工种植细茎石斛进行微量元素含量研究;方法：利用干法灰化处理样品,用火焰原子吸收光谱测定细茎石斛中9种微量元素Fe、Zn、Cu、Mn、Co、N i、Cr、Cd、Pb的含量;结果：RSD值在0.03%~3.74%之间,回收率为101.1%~107.3%,铁元素含量最高。     

用火焰原子吸收分光光度法直接测定原油中的铁和镍

探讨了用混合有机溶剂（环己酮、冰醋酸和异丙醇）将原油溶解后,利用火焰原子吸收分光光度法直接测定原油中铁和镍的可行性。实验结果表明,在用塞曼效应扣除背景的吸收干扰后,用标准曲线法测得的结果与采用干法灰化原子吸收分光光度法测得的结果基本吻合。采用这种方法测定铁和镍的平均加标回收率分别为１０５％和９８．１％,变异系数分别为５．７％和１０％．     

用火焰原子吸收分光光度法直接测定原油中的铁和镍

探讨了用混合有机溶剂（环己酮、冰醋酸和异丙醇）将原油溶解后,利用火焰原子吸收分光光度法直接测定原油中铁和镍的可行性。实验结果表明,在用塞曼效应扣除背景的吸收干扰后,用标准曲线法测得的结果与采用干法灰化－原子吸收分光光度法测得的结果基本吻合。采用这种方法测定铁和镍的平均架示回收率分别为１０５％和９８．１％,变异系数分别为５．７％和１０％。     

ICP—AES法测定航空润滑油中痕量磨损金属的研究

润滑油中磨损金属的测定常用原子吸收光谱法,其不足之处在于不能同时测定多个元素,基体干扰严重,钛等难熔元素测定困难。而ICP-AES法具有能满足多元素在大范围含量内同时测定的优点,近年来在润滑油分析中应用日渐增多。对于磨损金属含量较高的润滑油(如内燃机车使用过的润滑油),可用有机溶剂稀释后供ICP-AES测定。然而对磨损金属含量极低的航空润滑油,采用大量有机溶剂稀释,会导致测定误差增大,故我们选用干法灰化处理试样。选加适量灰化助剂,使待测成分生成难挥发的含硫化合物,以减少灰化时的挥发损失。所得灰分用酸溶解后即可进行ICP-AES测定。     

火焰原子吸收法测定污水处理厂四个季节污泥中铜、锌、铅、镉、铬、镍

采用空气—乙炔火焰原子吸收光谱法测定污水处理厂污泥中铜、锌、铅、镉、铬、镍的含量.详细研究了灰化温度、灰化时间、消解加酸量对不同金属吸光度的影响.在最佳工作条件下,六种元素标准曲线相关性较好（r在0.9970~0.9999之间）,精密度较好（RSD在0.20%~3.72%之间）,样品加标回收率为92.8%~104.9%,测定结果准确可靠,得出了不同季节生活污泥中铜、锌、铅、镉、铬、镍含量变化规律.     

火焰原子吸收光谱法测定人参和西洋参中微量元素

采用干法灰化法处理样品，用HNO3溶解灼烧后的残渣，用火焰原子吸收光谱法测定溶液中Zn、Cu、Fe、Mn、Co、Ni、Ca、Mg、Cd、Pb等10种微量元素的含量．方法简便、快速，并获得满意结果．     

云南砚山产阳荷微量元素研究

阳荷属野生姜科植物,是一种食药兼用的天然膳食纤维绿色食品。利用灰化法处理样品,用火焰原子吸收光谱法连续测定阳荷中铁、铜、锌、锰、钴、铬、镍、镉、铅9种微量元素的含量。结果：RSD％在0．66～4．38之间,加标回收率为99．8％～112％,阳荷中锰、锌、铁元素含量较高。     

火焰原子吸收光谱法测定奶粉中的锌含量

采用混酸、超声波消解法进行奶粉样品处理,用火焰原子吸收光谱法测定其锌的含量,测定结果准确可靠,省时、省力、经济、环保,避免了传统的灰化法或消化法处理奶粉样品的繁琐操作及对环境所造成的污染.     

悬浮液进样-火焰原子吸收光谱法测定饲料中的微量元素

以邻苯二甲酸二丁酯-琼脂溶液为悬浮液，建立了悬浮液进样-火焰原子吸收光谱法快速测定饲料中微量元素铁、锌、铜的方法．回收率为96．5％-102．2％，测定结果与灰化法一致．     

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.     

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.     

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.     

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.     

A computer generator for randomly layered structures

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

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.     

Jane Eyre——A Feminist In The 19th Century

In the 19th century the society was controlled by men, and women were just appendants of them, they had not any rights and freedom. But Jane was an exception, she showed some characteristics of early feminist. Jane showed her characteristics of feminism in three aspects: rebellion, equality, and independence. These characteristics were helpful to her success, and feminism is the only way out for women of that time.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-