芦荟甙的伏安行为及其应用研究

芦荟甙在０．０５ｍｏｌ·Ｌ＾－１硫酸溶液中出现一灵敏的吸附伏安峰,峰电位为０．２３Ｖ（ｖｓ．Ａｇ／Ｃｌ）。峰电流与芦荟甙的浓度在２．０×１０＾－８～４．０×１０＾－７ｍｏｌ·Ｌ＾－１和４．０×１０＾－７～６．０×１０＾－６ｍｏｌ·Ｌ＾－１范围内成线性关系,检出限为５．０×１０＾－９ｍｏｌ·Ｌ＾－１（富集时间为１５０ｓ）。用线性扫描和循环估安法研究了体系的电化学行为,并应用于芦荟原胶中芦荟甙的的测定     

吸附溶出伏安法测定水中痕量钴

介绍测定痕量钴的一种方法。在０．０１ｍｏｌ／Ｌ ＮＨ３·Ｈ２Ｏ－ＮＨ４Ｃｌ和１．０×１０＾－６ｍｏｌ／Ｌ酸性铬兰Ｋ（ＡＣＢＫ）溶液中，Ｃｏ（Ⅱ）产生很灵敏的还原波，其峰电位是－０．５２Ｖ（ｖｓ、ＳＣＥ）．Ｃｏ（Ⅱ）的浓度在２．０×１０＾－８￣５．０×１０＾－７ｍｏｌ／Ｌ的范围内与峰电流成直线关系，检测限是５．０×１０＾－９ｍｏｌ／Ｌ。这一方法用于测定水中痕量钴，结果令人满意。     

锇—钼酸盐—碱性染料显色反应的研究

在聚乙烯醇存在下，锇与钼酸铵和碱性染料罗丹明Ｂ，丁基罗丹明Ｂ，耐尔蓝形成离子缔合物，不同碱性染料所形成的缔合物服从比耳定律的浓度范围和摩尔吸光系分别是：０－１．２μｇ／２５ｍｌ和ε５７０ｎｍ＝２．６２×１０＾６Ｌ．ｍｏｌ＾－１ｃｍ＾－１；０－１．０μｇ／２５ｍｌ和ε５７０ｎｍ＝２．８６×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ／２５ｍｌ和ε５８５ｎｍ＝２．８１×１０＾６Ｌ．ｃｍ＾－１；０－１．８μｇ     

几种含硫有机化合物与铜的络合物的极谱行为研究

高胱氨酸、６－巯基嘌呤和硫尿嘧啶均能与铜离子作用而在汞电极上产生两个吸附波、在柠檬酸钠溶液中，高胱氨酸与铜的络合物在－０．０６Ｖ处产生的阳极化波较为灵敏，其检测限为２×１０＾－８ｍｏｌ／Ｌ高胱氨酸，线性范围为８×１０－６～１×１０＾－５ｍｏｌ／Ｌ．６－巯基嘌呤和硫尿嘧啶在乙二胺介质中与铜产生的络合物波较好，前者在－０．８３Ｖ处和后者在－０．４４Ｖ处的阴极波较适合于分析，它们的检测限分别为８×１０＾     

次黄嘌呤在铜电极上的伏安特性研究

研究了次黄嘌呤在铜电极上的电化学行为。实验发现,以１．９６×１０＾－３￣４×１０＾－４ｍｏｌ·Ｌ＾－１ＮａＯＨ作支持电解质时,在－０．２５￣－０．４０Ｖ的电位范围内有一灵敏的阴极峰,它是吸附于铜电极表面的Ｈｘａ与Ｃｕ＾＋络合物的溶出伏安峰,在选择的实验条件下,峰高与Ｈｘａ的浓度在１．４６×１０＾－６￣２×１０＾－３ｍｏｌ·Ｌ＾－１范围内呈良好的线性关系,最低检测限为５．６×１０＾－８ｍｏｌ·Ｌ＾－     

和厚朴酚的吸附伏安法研究

和厚朴酚在０．１ｍｏｌ·Ｌ＾－ＮＨ３－ＮＨ４Ｃｌ底液中,出现一灵敏吸附伏安还原峰,Ｅｐ＝－０．２３Ｖ（ｖｓ．Ａｇ／ＡｇＣｌ）。当富集时间为３ｍｉｎ时,峰电流与和厚朴酚浓度在１．０×１０＾－８￣１．０×１０＾－７ｍｏｌ·Ｌ＾－１范围内呈线性关系,检测限为３．０×１０＾－９ｍｏｌ·Ｌ＾－１,可用于中药厚朴的测定。     

安眠酮的吸附极谱波研究

在ｐＨ４．５缓冲溶液中，安眠酮在－１．１７Ｖ处产生一灵敏吸附极谱波，利用此波可测定微量安眠酮，线性范围为１．０×１０＾－７￣１．０×１０＾－６ｍｏｌ·Ｌ＾－１，检测下限为９．０×１０＾－８ｍｏｌ·Ｌ＾－１，所提出的方法用于片剂及血清中安眠酮的测定，结果满意。     

导数示波极谱法测定大气中微量的二硫化碳

研究了导数示波极谱法测定大气中微量的二硫化碳。在０．６９００ｍｏｌ．Ｌ＾－１乙醇０．０９７０ｍｏｌ．Ｌ＾－１二乙胺－０．００１ ５ｍｏｌ．Ｌ＾－１ＥＤＴＡ底液中,二硫化碳产生一灵敏的峰电流。峰电位为－０．６４Ｖ（ｖｓ．ＳＣＥ）．二硫化碳浓度在１．００×１０＾－８ｍｏｌ．Ｌ＾－１－３．００×１０＾－５ｍｏｌ．Ｌ＾－１范围内,浓度与峰电流具有线性关系。检测限为１．００×１０＾－８ｍｏｌ．Ｌ＾－１．用本     

安定在碳糊电极上的电化学特性

在０．０５０ｍｏｌ／Ｌ ＨＣｌ和０．０１５ｍｏｌ／Ｌ ＫＮＯ３溶液中,安定在碳糊是极上于－０．７７Ｖ左右产生一灵敏的吸附阴极溶出伏安峰。线性范畴为１．０×１０＾－７￣４．０×１０＾－５ｍｏｌ／Ｌ,检测下限为５．０×１０＾－８ｍｏｌ／Ｌ,测定了血清中的安定含量,结果满意,循环伏安实验结果证实安定在碳糊电极上的吸附为反应物吸附。     

铜与丙酮醛双（N,N‘—二丁基）缩氨基硫脲显色反应的研究

在ｐＨ＝５－１２的乙醇水溶液中,Ｃｕ６２＋与丙酮醛双,Ｎ．Ｎ‘－缩氨基硫脲可形成１：１型络合物,其λｍａｘ＝４８８ｎｍ,ε４８８＝１．０９×１０＾４Ｌ．ｍｏｌ＾－１．Ｃｕ＾２＋浓度在０－５．０ｍｇ／Ｌ内服从比耳定律;若用氯仿萃取后测定,其ε４８８＝１．７７×１０＾５Ｌ．ｍｏｌ＾－１ｃｍ＾－２,Ｃｕ＾２＋浓度在０－０．５０ｍｇ／Ｌ内服从比耳定律。     

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.     

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.     

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.     

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.     

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.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

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。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

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.