从毛发中提取的胱氨酸的红外光谱定量测定

在P－EM1730型FTIR上，编制了红外光谱定量分析的OBEY程序，该程序来用峰高、峰面积、一阶导数量大、一阶导数量小、一阶数区间、二阶导数最小6种不同的方法，并把此程序应用于从毛发中提取的胱氨酸含量的测定，通过对胱氨酸含量的测定，验证了程序的可行性，且对6种方法进行了比较，证明了6种方法在定量分析中都是切实可行的。     

红外光谱法定量测定防蛀剂中对二氯苯和萘含量的研究

用红外光谱法测定了防蛀剂中对二氯苯和萘的含量 .测定中分别选择了(81 9± 3)cm-1 和 (782± 3)cm-1 峰为对二氯苯和萘的定量峰 .并采用峰高、峰面积、一阶导数(最大、最小、区间 )、二阶导数等方法 ,所得对二氯苯和萘标准曲线的相关系数分别在 0 .996～0 .999、0 .993～ 0 .996之间 ,当样品中对二氯苯和萘的含量在 0 .0 0 1 5～ 0 .0 1 5mg·mL-1 时 ,其吸光度与浓度呈线性关系 .     

导数荧光法测定复方新诺明中的磺胺甲胺异恶唑和甲 …

在磺胺甲基异恶唑的激发峰２６９．４ｎｍ处记录一阶导数发射光谱，采用峰一谷法测量导数信号，在甲氧苄胺嘧啶存在下，不经分离和掩蔽甲基异恶唑的测定；用二阶导数激发光谱，在磺胺甲基异恶唑存在下，实现甲氧苄胺密啶的测定，磺胺甲基异恶唑的线性范围０－４．０μｇ／ｍＬ，甲氧苄胺嘧啶的线性范围是０－３．０μｇ／ｍＬ。     

一阶导数分光光度法测定蜂王浆中蜂王酸的含量

本文提出用一阶导数分光光度法消除蜂王浆中基体干扰直接测定蜂王浆中蜂王酸含量的新方法，此法不需分离手续，快速、灵敏、简便、准确，线性范围在０～１５μｇ／ｍＬ，相对标准偏差为１．２１％，回收率在９６％～１０２％。     

维生素K3的电化学研究

采用单扫示波极谱法，ＶＫ３在０．１ｍｏｌ／ＬＮａＣｌ底液中，于－０．４６Ｖ（ＳＣＥ）处有一良好的二阶导数峰，峰高与浓度在５×１０－７～２×１０－５ｍｏｌ／Ｌ范围内成线性关系，检测限为２．５×１０－７ｍｏｌ／Ｌ．当ｐＨ值小于３．６０时，ＶＫ３与氢离子作用，于零伏左右有一准可逆的２ｅ－＋Ｈ＋波；当ｐＨ值大于３．６０时，用低扫速的卷积伏安法观察，可发现ＶＫ３有双锋，说明有反应中间体存在，在水合介质中其反应机理是可逆的逐级双电子过程．此外，还对底液中溶解氧的影响进行了讨论．     

玻碳汞膜电极伏安法测定氟哌酸

本文提出一个使用玻碳薄汞膜电极测定氟哌酸的伏安法。在ｐＨ５．６￣７的乙酸￣乙酸钠缓冲溶液中，氟哌酸在－１５００ｍｖ有一个灵敏的导数阴极波，用于胶囊中氟哌酸含量的测定，结果满意。氟哌酸浓度在０．２￣５００ｍｇ／Ｌ范围内与峰高呈线性，检测限为０．２ｍｇ／Ｌ，加标回收率在９７．２￣１０４％间，对含量为０．１ｇ／粒的氟哌酸胶囊重复测定，ＲＳＤ（ｎ＝５）为０．６７％和１．２６％。方法简便，结果准确。     

毛细管气相色谱法测定706代血浆中残留甲醇、乙二醇的含量

本文采用内标法，以丙二醇为内标物，应用上分１００２型气相层析仪测定羟乙基淀粉代血浆中残留甲醇和乙醇的含量。选用天津试剂二厂弹性石英交联聚乙二醇—２０Ｍ毛细管色谱柱，以氢火焰离子化检测器检测，氮气为载体，分流进样．当甲醇和丙二醇内标物浓度比为０．０２：１～０．３２：１，乙二醇和丙二醇内标物浓度比为１．０：１～４．０：１时，被测物质峰面积与浓度呈线性关系，测定了甲醇和乙二醇的相对定量校正因子．甲醇平均测定回收率为９８．７９％，相对标准偏差ＣＶ＝０．０１３％，乙二醇的平均回收率为９７．７７％，ＣＶ＝０．０１１％．     

铁－α－安息香肟的新吸附催化波

本文给出了铁－α－安息香肟络合物在Ｎａ２ＣＯ３－ＮａＨＣＯ３底液中的极谱吸附催化波．在该条件下，峰电位Ｅｐ＝－０．５８Ｖ（ｖｓ．ＳＣＥ）．铁在０～０．５μｇｍＬ－１范围内浓度和导数峰高呈线性关系．检测限为：５×１０－４μｇｍＬ－１．具有良好的稳定性和选择性．测定了头发及自来水中的痕量铁     

高灵敏显色剂二阶导数分光光度法测定小麦中铜的研究

研究了用ｍｅｓｏ－四（对磺基苯）－卟啉为试剂，二阶导数分光光度法测定小麦中铜含量的分析方法及最佳条件。测定时波长在４１６～４４０ｎｍ之间，振幅为４ｎｍ，以Ｈ３ＰＯ４为掩蔽剂与很好地消除了Ｆｅ３＋的干扰。在ＰＨ＝３．０～５．５时，配合物的λｍａｘ＝４３２ｎｍ，线性范围为５～３０μｇ·Ｌ－１，回收率在１０２～１０６％之间，相对标准偏差为２．２４％。用该法测定了小麦中铜含量，结果令人满意。     

一种提取含噪声信号中重叠峰位置的新方法

以二阶B-样条小波为分析小波，提出了一种提取分析化学中含噪声重叠峰位置的新方法——连续样条小波变换法．在合适的尺度下，处理后的信号类似于信号的四阶导数．结果表明，采用连续样条小波变换法能使峰变窄，并能提高信号的信噪比，同时还能从含噪声重叠信号中直接得到重叠峰的数目及其相应的峰位置．     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that