萃取催化动力学光度法测定痕量锰

研究了在pH9．7的介质中,利用Mn（2＋）催化过氧化氢氧化水杨醛显色的指示反应,用萃取平衡控制反应时间及反应程度,通过测量500nm下水相的吸光度,建立了萃取催化光度法测定痕量锰的新方法方法的线性范围为0．020－0．20μg／ml,检出限为0．010μg／ml用于水样中痕量锰的测定,结果满意。     

痕量锰的共沉淀分离富集和测定的研究

本研究了用PAN[1-(2-吡啶偶氮)-2-荼酚]共沉淀分离富集人发中的痕量锰．用微量注射进样火焰原子吸收光谱(FAAS)测定的方法。在pH10．5的试样溶液中．不需另加载体．PAN能定量地共沉淀痕量锰。溶液中锰的浓度在0-0．25μg／ml范围内时．标准曲线呈线性。人发中共存的其它元素不干扰测定。锰的标准加入回收率在96-104％之间。12次重复测定锰含量为2．72μg／g的发样的变异系数为4．8％。方法的特征浓度为1．0×10^-3μg／ml.本法简便稳定．用于人发中痕量锰的测定．获得了满意的结果．     

液相色谱－串联质谱法测定饮用水中的丙烯酰胺

建立了用液相色谱－串联质谱法测定饮用水中丙烯酰胺的方法。该法使用Cole-ParmerPTFE滤膜过滤样品,采用AcquityHSST3（1．8μm,2．1X50mm）柱分离,以0．1％甲酸和甲醇为流动相（体积比95：5）分离。采用UPLC／MS／MS电喷雾电离正离子模式（ESI＋）,多反应检测（MRM）,以外标法定量分析。该方法在0．10μg／L到0．60μg／L有良好线性范围。最低检测下限（LOD）0．10μg／L。加标回收率范围为88．9％-106．7％。相对标准偏差均低于8.2％。方法适用与水中丙烯酰胺的测定,具有灵敏度高、重现性好的特点,在水质监测中有重要作用。     

KBrO3氧化二溴羧基偶氮胂褪色光度法测定Ti(Ⅳ)

基于稀H2SO3介质中,痕量钛（Ⅳ）催化KBrO3氧化二溴羧基偶氮胂（DBCAA）的褪色反应,建立了测定痕量钛（Ⅳ）的催化动力学光度法．方法检出限为0．15μg／L,线性范围为0．0～8．0μg／L．结合溶剂萃取分离,可用于测定人发、植物、茶叶及岩石样品中的痕量钛（Ⅳ）．     

用反相流动注射催化动力学光度法测定微量元素碘

基于在磷酸介质中I^-对溴酸钾氧化维多利亚蓝（B）褪色反应的催化作用,建立了一种用反相流动注射催化动力学光度法测定微量元素碘的新分析体系,该方法的线性范围为0．2～4．0μg／mL,检出限为0．12μg／mL,相关系数为0．9982．用该方法测定碘盐中微量I^-,结果令人满意．     

萘酚绿B催化动力学光度法测定痕量钒

以磷酸介质中，硫酸铵存在下，微量钒(V)对溴酸钾氧化萘酚绿B褪色反应具有的催化作用，建立了测定微量钒的新催化动力学光度法．测定线性范围为0．2～2．2μg／L，方法用于人发和水样中微量钒的测定，结果满意。     

分光光度法测定矿石中痕量铅

用双硫腙显色分光光度法测定铁矿石中痕量铅，该方法具有简单、快速、灵敏等特点，用以测定铁矿石中的痕量铅，获得了满意的结果．检出限为0．06μg／mL，线陛范围为0．01μg／mL～1．0μg／mLPb^2＋，相关系数为0．9996，回收率89％～99％．     

催化动力学光度法测定面粉中痕量铜

研究了在盐酸介质中，铜(Ⅱ)催化碘酸钾氧化偶氮胂Ⅰ褪色反应的适宜条件与影响因素，建立了动力学光度法测定痕量铜的新方法．方法的线性范围为0-120μg/L，检出限为0．1686μg/L．该催化反应用于面粉中铜(Ⅱ)的测定，结果满意．     

催化动力学荧光法测定痕量铁新体系的研究

在pH=4.0的HAc-NaAc缓冲溶液介质中,对铁催化高碘酸钾氧化二氯荧光素的反应进行了研究,建立了一种荧光光度催化法测定痕量铁的新方法,并将其应用于测定蔬菜中铁含量．结果表明,在实验确定的最佳条件下,该方法的线性范围为0～64μg／L,检出限为4．949×10^6g／L,相对标准偏差为0．22％,回收率为95．6％～102．2％．该方法用于测定蔬菜中铁含量的结果令人满意．     

催化动力学光度法测定痕量锰──KIO_4-Mn(Ⅱ)-Phen-溴甲酚绿体系

基于在弱酸介质中，锰（Ⅱ）催化高碘酸钾氧化溴甲酚绿的反应，建立了动力学分光光度法测定痕量锰（Ⅱ）的新方法，方法的检出限为578×10－1gg／ml，测定线性范围为0～0.30μg／15ml，直接用于大米、面粉和自来水中痕量标的测定，均获得满意的结果。     

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.