新显色剂5-(8-喹啉侧氮)-2,3-二羟基吡啶分光光度法测定微量钴

用作者合成的新试剂5-(8-喹啉偶氮)-2,3一二羟基吡啶作显色剂,以分光光度法测定微量钴,在pH9.3的硼砂缓冲溶液中,配合物的最大吸收波长位于624nm,钴量在0～20μg/25ml范围内符合比尔定律,摩尔吸光系数为9.0×104C·mol-1·cm-1.方法简便,快速,应用于维生素B12和镍盐中钴的测定,获得满意结果.     

新试剂MBTAHQ的合成及与镍的显色反应研究

合成了新显色剂5-(6-甲氧基苯并噻唑偶氮)-8-羟基喹啉(MBTAHQ),分子式C17H12N4O2S,相对分子质量336.37,熔点227～228℃.详细研究了该试剂与镍显色反应的条件及分光光度性能.在弱酸性介质中,有非离子表面活性剂存在下,试剂与镍形成21的紫红色络合物,最大吸收波长位于575 nm处,表观摩尔吸光系数为1.46×105 L@mol-1@cm-1.镍的浓度在0～240μg/L范围内服从比尔定律.显色体系灵敏度高,应用于铝合金中镍含量的测定,结果满意.     

新显色剂5-(8-喹啉侧氮)-2,3一二羟基吡啶分光光度法测定微量钴

用作者合成的新试剂 5 - (8-喹啉偶氮 ) - 2 ,3-二羟基吡啶作显色剂 ,以分光光度法测定微量钴 ,在 pH9 3的硼砂缓冲溶液中 ,配合物的最大吸收波长位于 6 2 4nm ,钴量在 0～ 2 0 μg/ 2 5ml范围内符合比尔定律 ,摩尔吸光系数为 9 0×1 0 4C·mol-1·cm-1.方法简便 ,快速 ,应用于维生素B12 和镍盐中钴的测定 ,获得满意结果     

新试剂DCOBA8Q5S与Al的荧光性能的研制和应用

本文研究了新试剂7－（2，4）－二羧甲氧基－5－羧基苯（偶氮）－8－羟基喹啉－5－磺酸与Al^3+的配合反应，结果表明，试剂在HAL／NaAC缓液体系中与Ll^3+形成荧光配合物。最大激发峰512nm最大荧光发射峰波长为570nm，络合物组成比为R：AL＝2：1，铝离子含量在0－1ug/25mL时符合比尔定律。本文拟用该方法对茶叶样中含量进行测定，结果令人满意，检测下限为5．04&;#215;10^-6g/L。     

新显色剂1-羟基-2-(5-NO2-2-吡啶偶氮) -8-氨基-3,6-萘二磺酸与钴显色反应的研究

对新显色剂 1 羟基 2 (5 NO2 2 吡啶偶氮 ) 8 氨基 3 ,6 萘二磺酸 (简称 5 NO2 PAH)与钴离子显色的适宜条件及其共存离子的影响进行了研究 ,建立了 5 NO2 PAH测定钴的新显色反应体系 .结果表明 ,在 pH =8.4～ 1 0 .0范围内 ,钴与试剂形成稳定的 1∶2配合物 ,其最大吸收峰位于 690nm ,表观摩尔吸光系数εCo=6.3 6× 1 0 4 L/(mol·cm) ,钴的浓度在 0～ 7μg/1 0mL范围内遵守比尔定律 .方法已用于VB12 和含钴分子筛等实际样品中钴含量的测定     

新试剂DCOBA8Q5S与A1的荧光性能的研制和应用

本文研究了新试剂7—(2、4)一二羧甲氧基—5—羧基苯(偶氮)—8—羟基喹啉—5—磺酸与Al~(3+)的配合反应,结果表明,试剂在HAL/NaAC缓液体系中与Ll~(3+)形成荧光配合物。最大激发峰512nm最大荧光发射峰波长为570nm,络合物组成比为R:AL=2:1,铝离子含量在0～1ug/25mL时符合比尔定律。本文拟用该方法对茶叶样中含量进行测定,结果令人满意。检测下限为5.04×10~(-6)g/L     

2-[2’-（5-硝基-吡啶）-偶氮]-1，8-二羟基萘-3，6-二磺酸与镍显色反应的研究与应用

研究了显色剂2-[2’-（5-硝基一吡啶）-偶氮]-1,8一二羟基萘-3,6-二磺酸（简称为5-NO2-PACA）光度法测定微量镍的方法。在pH=11．5的NH3-NH4C1的缓冲介质中Ni^2＋与5-N02-PACA在室温下很快形成1：1的蓝色配合物,最大吸收波长为635nm,表观摩尔吸光系数ε=1．00×10^5L·mol^-1·cm^-1,Ni^2＋浓度在0—20μg／25mL范围内符合朗伯一比尔定律,该方法用于测定蔬菜（黄瓜、青椒）中微量镍,结果满意。     

Mo(Ⅵ)-8-羟基喹啉-5-磺酸-氯酸钠体系络合吸附催化波

提出了 Mo(VI)-HQSA(8-羟基喹啉-5-磺酸)-ClO_3~-的络合吸附催化体系,灵敏度较高,Mo(VI)的测定下限为2×10~(-10)mol/L,并应用于水中痕量 Mo(VI)的测定.用多种电化学测试手段研究体系的性质和反应机理.实验表明为络合吸附催化波.恒电解法证明,电极反应电子数为1,是络合物中 Mo(VI)还原为 Mo(V).在经典极谱仪上,测得催化反应的速率常数 k_(25℃)为7.9×10~2mol~(-1)·L·s~(-1).     

罗丹明B-7碘-8-羟基喹啉-5-磺酸胶束体系荧光熄灭法测定钒

研究了在HAcNH4 Ac介质中钒罗丹明B 7碘 8羟基喹啉 5磺酸表面活性剂四元体系的荧光特性 ,提出了以罗丹明B 7碘 8羟基喹啉 5磺酸溴代十六烷基三甲铵荧光熄灭法测定钒的方法 .该法测定V(Ⅴ )的线性范围为 0 .1～ 6.0 μg/L ,检出限为 0 .0 0 68μg /L .采用适当掩蔽剂 ,测定了自来水中的微量元素钒 ,获得了满意的结果     

新试剂5-(对磺酸基苯偶氮)-8-羟基喹哪啶与铀(VI)显色反应及应用

研究了新试剂5-(对磺酸基苯偶氮)-8-羟基喹哪啶(SPHQ)与铀(VI)的显色反应,在pH=5.5的醋酸-醋酸钠缓冲介质中,SPHQ与铀(VI)形成21稳定红色配合物.最大吸收波长位于550nm处,表观摩尔系数为5.95×104 L.mol-1.cm-1.铀(VI)含量在0-30μg/25ml 范围内符合比尔定律.方法用于分析环境水样中微量的铀,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.     

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.     

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.