水杨酸丁酯—Lu^3＋胶束体系荧光法测定铽

系统地探讨了水杨酸乙、丁、戊酯－ＴｒｏｔｏｎＸ－１００体系荧光法测定Ｔｂ＾３＋、Ｄｙ＾３＋的最佳条件，发现Ｌｕ＾３＋或Ｇｄ＾３＋的共享存能使Ｔｂ＾３＋、Ｄｙ＾３＋的特征荧光增敏。其中水杨酸丁酯－Ｌｕ＾３＋增敏体系的灵敏度最高，测定Ｔｂ＾３＋、Ｄｙ＾３＋的检测限分别达到０．２和０．８ｇμ／Ｌ。应用本法成功的测定了Ｌｕ２Ｏ３、Ｇｄ２Ｏ３中０．００ｘ％的Ｔｂ４Ｏ７的含量。     

掺杂Eu^3＋的磷钨酸钠玻璃的合成及发光特性

本工作采用高温固相反应法合成掺杂１％Ｅｕ＾３＋离子的不同Ｐ２Ｏ５／ＷＯ３比例的磷钨酸钠玻璃，测定在３９４和４６４ｎｍ波长激发下的荧光光谱，探讨了参杂Ｅｕ＾３＋离子的磷钨酸钠玻璃的发光特性。．     

吡嗪－2－羧酸体系导数荧光法同时测定铕、铽

研究了吡嗪－２－羧酸与ＥＵ３＋、Ｔｂ３＋形成配合物的发光机理、配合比、探讨了导数荧光技术同时测定Ｅｕ３＋、Ｔｂ３＋的最佳条件和其他稀土离子共存的影响。Ｅｕ３＋、Ｔｂ３＋检测限分别达到４．７和５．４ｎｇ·ｍｌ－１，利用本方法成功地测定了稀土试样中铕、铽的含量。取得满意的结果。     

铬黑T作显色剂分光光度法测铁

在ＰＨ≈１０的氨－氯化铵缓冲溶液中,Ｆｅ＾３＋与铬黑Ｔ形成１：３的暗红色配合物,其最大吸收波长在４８８ｎｍ处,ε值约为２．３＊１０＾４,线性范围为０－３０μｇ／２５ｍｌ。此方法可用于工业盐酸,普通硅酸盐水泥等样品中铁含量的测定,其结果与火焰原子吸收法较好吻合。     

痕量氟的Al^3＋—Calcein配合物荧光熄灭测定法

本文建立了痕量氟的Ａｌ＾３＋－Ｃａｌｃｅｉｎ配合物荧光熄灭测定法。该法激发波长４８０ｎｍ，发射波长５０３ｎｍ，线性范围２－１５０μｇ／Ｌ，灵敏度为２μｇ／ＬＦ＾－。１００μｇ／ＬＦ＾－时标准偏差为１．３μｇ／ＬＤ＾－，是现有的最灵敏方法之一。     

铕—二苯甲酰甲烷—邻菲罗啉—CTAB体系的荧光研究

在阳离子表面活性剂ＣＴＡＢ存在下，研究了铕－二苯甲酰甲烷－邻菲罗啉三元配合物在水溶液中荧光发射的性质。采用３７０ｎｍ光波激发，配合物的最大特征荧光发射波长为６１４ｎｍ。当ＣＴＡＢ的浓度达到０．４５ｍｍｏｌ·Ｌ＾－１时，配合物的荧光强度达到最大，Ｅｕ＾３＋浓度在０￣０．１ｎｇ·Ｌ＾－１范围内，它与荧光强度有良好的线性关系。实验表明，检出下限可达１ｆｇ·Ｌ＾－１。     

变物性对水平同心套管中自然对流换热的影响

研究了变物性对水平同心套管夹层中自然对流换热的影响。计算时Ｒａ达到了１０＾６,温差率θ０＝（Ｔｂ－Ｔｃ）／Ｔｃ分别为０．２、０．５、１．０和２．０半径比从１．５０、２．２８、３．３３到５．００计算时采用质量平均温度Ｔｍ作为参考温度,得到了速度场和温度场的分布。     

紫外光度法测定废水中叠氮根含量的研究

该文介绍了应用紫外分光光度法测定废水中叠氮根离子含量的一种新方法，在缓冲溶液ＫＨ２ＰＯ４－ＮａＨＰｏ４介质中，有表面活性剂Ｎ－氯代十六烷基吡啶存在时，Ｎ３＾－与ＣＳ２反应的产物ＣＳ２Ｎ３＾－在３２１ｎｍ波长处有吸收峰，峰高与Ｎ３＾－离子浓度在０．５￣６．０ｍｇ／Ｌ范围内呈线性关系，因此可用紫外分光光度法对Ｎ３＾－含量进行测定。该方法简单，实用，抗干扰能力强，测定下限为０．５ｍｇ／Ｌ，可以用于起爆药     

Tb~（3＋），Ce~（3＋）离子在Al_6Si_2O_（13）中的光致发光

采用溶胶－凝胶法合成了以Ａｌ６Ｓｉ２Ｏ１３为基质，掺杂Ｔｂ３＋，Ｃｅ３＋的发光材料．经ＸＲＤ结构分析表明，晶体结构属于正交晶系，其晶胞参数为ａ＝０．７５９５ｎｍ，ｂ＝０．７７５６ｎｍ，ｃ＝０．２８８２ｎｍ．测定了发光材料的激发和发射光谱，研究了从溶胶向凝胶及凝胶向发光体的转变过程．通过实验确定了材料的最佳组成．     

土壤中有效磷的快速测定

用ｃ（ＮＨ４Ｆ）＝０．０１５ｍｏｌ／Ｌ的ＮＨ４Ｆ和ｃ（ＨＣｌ）＝０．３ｍｏｌ／Ｌ的ＬＣｌ提土壤样品中有效磷,以钼锑抗分光光度法测定有效磷的含量。在ｃ（Ｈ２ＳＯ４）＝０．２～０．３ｍｏｌ／Ｌ的Ｈ２ＳＯ４和Ｓｂ＾３＋存在下,到与钼酸铵反应形成磷锑钼杂多酸,该杂多酸在常温下被抗坏血酸还原为磷钼蓝络合物,它的最大吸收波长于７００ｎｍ处,磷量在０．１～１４００μｇ／Ｌ内服从比尔定律,检出限为０．０２４μｇ／     

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.     

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.     

The Analects and the Moment in Peking——The influence of a Confucian education system on the personality formation,the way of thinking and the fate of the main characters

0.Preface China has long been boasting of its colorful and immense culture which comprises of Taoism,Confucianism and Buddhism.The interwoven influence among the religions on Chinese way of thinking,on the nation＇s behavior in their social life throughout the long history is beyond list.