催化动力学分光光度法测定超痕量铜(Ⅱ)的研究

在硫酸介质中,痕量铜(Ⅱ)能灵敏地催化高碘酸钾氧化靛红La褪色。系统地研究了指示反应的最优化实验条件,建立了测定痕量铜(Ⅱ)的新方法。方法检出限为4×10-12g/ml铜(Ⅱ)。方法检测范围0～0.1μg铜(Ⅱ)/25ml。用以测定矿泉水中的痕量铜(Ⅱ),获得了较好的结果。     

催化荧光法测定食品中痕量铜

本文研究了在氨性介质中,铜(Ⅱ)催化过氧化氢氧化荧光素褪色,使其荧光减弱的指示反应.建立了催化荧光法测定痕量铜的新方法.方法检出限为0.1ng/ml,测定范围为0～0.14μg/25ml.方法简便快速,可直接用于食品中痕量铜的测定,结果满意.     

催化褪色法测定溶剂中痕量铜（Ⅱ）的研究

探讨了氨水介质中痕量铜(Ⅱ)催化过氧化氢氧化邻苯二酚紫的褪色反应及其动力学条件,建立了测定乙醇和氯仿中痕量铜(Ⅱ)的新方法,测定范围为0—40ngCu~(2+)/25ml,方法灵敏度为1.0×10~(12)gCu~(2+)/ml,回收率97%—99%,测定结果稳定.     

以潘生丁为指示剂催化荧光法测定痕量铜的研究

本文研究了在弱碱性介质中,铜(Ⅱ)催化过氧化氢氧化潘生丁褪色,使荧光减弱的指示反应.建立了催化荧光法测定痕量铜的新方法.铜量在0～0.3μg/25ml范围内呈线性关系,检出限为0.8ng/ml.应用于水样和人发中铜的测定,结果满意.     

铜(Ⅱ)—麦塔喇红—过氧化氢体系催化光度法测痕量铜的研究

本文研究了在NH_3-NH_4Cl缓冲体系中,痕量铜(Ⅱ)催化过氧化氢氧化麦塔剌红的褪色反应。建立了一种测量痕量铜的新催化光度法,线性范围为0-120ng/ml,检出限为1.64×10~(-10)g/ml,并用于铝合金标样,环境水质标样和人发样中痕量铜的测定。     

煌焦油兰──过氧化氢体系催化光度法测痕量铜(Ⅱ)的研究

本文研究了在氨性介质中，痕量铜（Ⅱ）催化过氧化氢氧化煌焦油兰褪色反应及其动力条件，建立了一种催化光度法测痕量铜（Ⅱ）的新方法，线性范围为002－10μg／25ml，检出限为39×10－10g／ml．用于环境水标样，铝合金标样中痕量铜（Ⅱ）的测定，结果满意．     

催化动力学褪色光度法测定痕量铜(Ⅱ)的研究

基于加热和HAC-NaAC缓冲溶液存在下,痕量铜(Ⅱ)能催化高碘酸钠氧化孔雀绿的褪色反应,从而建立了催化高碘酸钠氧化孔雀绿褪色光测定痕量铜(Ⅱ)的新方法.该方法的线性范围4.00-16.00ng/mL铜(Ⅱ),检出限为4.70×10-9g/mL,用于茶叶,菇类中痕量铜的测定,回收率约在97.0%--103.5%之间,结果满意.     

催化动力学光度法测定痕量铜--Cu(Ⅱ)-罗丹明B-H2O2体系

研究了在弱酸性介质中微量铜催化H2O2氧化罗丹明B褪色的指示反应,建立了催化动力学测定铜(Ⅱ)的新方法。方法检测限为1.5μg/L,测定的线性范围0-3.75μg/25ml,本法已用于人发样及水样中的痕量铜的测定。     

过氧化氢-茜素体系催化光度法测定痕量铜的研究

研究了催化动力学褪色光度法测定痕量铜(Ⅱ)的新体系,反应介质为NH3·H2O-NH4Cl缓冲溶液(pH=10.0),催化体系为痕量Cu(Ⅱ)催化H2O2氧化茜素的褪色反应.考察了反应体系的适宜条件、动力学性质及28种干扰离子的影响,建立了一种催化动力学光度法测定痕量铜的新指示反应.本法的线性范围为0～1.2×10-7 g/mL,其灵敏度远远高于普通光度法,检出极限为1.76×10-10g/mL,可应用于农产品和蒙药中铜的测定,相对标准偏差为1.1%～3.2%.     

用新的指示反应催化光度法测定痕量铜

本文研究了铜的一种新的指示反应。在氨水介质中,以硫脲为活化剂,Cu(Ⅱ)对加速过氧化氢氧化碱性品红褪色反应有强烈的催化作用,由此建立了一种测定痕量Cu(Ⅱ)的催化光度新方法。该法检测限为1.2ng/ml,测定范围为0—0.6ug/ml,应用于实际样品分析结果满意。     

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.     

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。     

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.