Ru(phen)32+-SO32--Ce(Ⅳ)体系化学发光法测定葡萄酒中的亚硫酸盐总量

提出了Ru(phen)32+-SO32+-Ce(Ⅳ)体系化学发光法测定溶液中亚硫酸盐的方法.SO32-浓度与化学发光强度在1.0×10-7～1.0×10-4mol/L范围内成正比,检出限为1.97×10-7mol/L(S/N=3),1.0×10-4mol/LSO32溶液重复6次测定结果的相对标准偏差为4.9%.该方法用于测定白葡萄酒中亚硫酸盐总含量为4.006×10-5mol/L,加标回收结果令人满意.     

Ru(phen)_3~(2+)-SO_3~(2-)-Ce(IV)体系化学发光法测定葡萄酒中的亚硫酸盐总量

提出了Ru(phen) 3 2 + -SO3 2 --Ce(IV)体系化学发光法测定溶液中亚硫酸盐的方法 SO3 2 -浓度与化学发光强度在 1 0× 10 -7～ 1 0× 10 -4mol/L范围内成正比 ,检出限为 1 97× 10 -7mol/L(S/N =3) ,1 0× 10 -4mol/LSO3 2 -溶液重复 6次测定结果的相对标准偏差为 4 9% 该方法用于测定白葡萄酒中亚硫酸盐总含量为 4 0 0 6× 10 -5mol/L ,加标回收结果令人满意     

流动注射化学发光分析法测定邻苯三酚

在碱性介质中,铁氰化钾直接氧化邻苯三酚产生化学发光信号,结合流动注射技术建立了一种测定邻苯三酚的化学发光新方法.该方法的相对发光强度与邻苯三酚的浓度在1.0×10-4-9.0×10-3 mol／L范围内呈线性关系,检出限为7.52×10-5 mol／L,对浓度为1.0×10-3 mol／L的邻苯三酚平行测定11次,相对标准偏差为1.58%,应用于湖水中的邻苯三酚的测定,结果满意.     

化学发光法测定痕量酚

基于在硫酸介质中 ,高锰酸钾与痕量酚之间反应能产生较强的化学发光的实验事实 ,建立了测定酚类的化学发光分析新方法 .该法线性范围为 8.0× 10 - 6- 2 .0× 10 - 4mol/L ;检出限为 1.2×10 - 6mol/L ;对 5.0× 10 - 5mol/L的苯酚进行连续 11次平行测定 ,相对标准偏差为 3.4 % .将该法应用于环境水样中酚含量的测定 ,结果良好 .     

三邻菲咯啉合亚钌-亚硫酸根-氯酸钾体系化学发光法测定葡萄酒中亚硫酸盐总量

提出了Ru(phen) 32 +-SO32 - -KClO3(phen =1 ,1 0菲咯啉 )体系化学发光法测定溶液中亚硫酸盐含量的方法 .SO32 - 浓度与化学发光强度在 1 .0× 1 0 - 6～ 1 .0× 1 0 - 3 mol/L范围内成正比 ,检出限为 2 .32× 1 0 - 6mol/L (S/N =3) ,1 .0× 1 0 - 4 mol/LSO32 - 溶液重复 6次测定结果的相对标准偏差为 3.8% .该方法成功地用于白葡萄酒中的亚硫酸盐总含量的测定 ,结果令人满意 .     

流动注射化学发光法测定盐酸异丙嗪

在0.015mol/L的硫酸介质中,硫酸铈氧化盐酸异丙嗪产生化学发光,详细研究了反应的影响因素,在优化的实验条件下盐酸异丙嗪测定的线性范围为1.0×10-7～1.5×10-5g/mL,检出限为4.0×10-8g/mL,对5.0×10-6g/mL的盐酸异丙嗪进行11次测定,其RSD为2.6%.将本法用于盐酸异丙嗪药片的分析,并与药典规定的方法进行对照,结果令人满意.     

流动注射化学发光增强法测定酪氨酸

在Na2CO3-NaHCO3介质中,酪氨酸对Luminol-K3Fe(CN)6化学发光体系有很强的增敏作用.据此建立了流动注射化学发光增强法测定酪氨酸的方法.发光信号的增强值(ΔI)与酪氨酸的浓度在5.0×10-5～4.0×10-7mol/L的范围内呈良好的线性关系,检出限为1×10-7mol/L(S/N=3),对于1.0×10-6mol/L的酪氨酸测定相对标准偏差为2.4%(N=11).该法用于测定医用氨基酸注射液中的酪氨酸,结果令人满意.     

过氧化草酸酯化学发光检测DNA荧光探针

根据过氧化草酸酯与双氧水作用产生的高能中间体激发荧光物质发光的原理,研究了利用过氧化草酸酯TCPO-H2O2化学发光体系测定Cy5标记的DNA探针的新方法,探讨了溶剂、酸度、催化剂及发光溶液浓度对化学发光信号的影响,确立了最佳分析条件.其线性范围为8.4×10-9~2.8×10-6mol/L,检出限(3σ)为2.8×10-9mol/L.据此建立了操作简便、灵敏度高的测定Cy5标记的DNA探针的新方法.     

抗坏血酸在半胱氨酸自组装膜上的电化学行为及应用

半胱氨酸自组装修饰金修饰电极对抗坏血酸(Vc)具有很高的电催化氧化活性.在pH 2.0的0.1 mol/L缓冲溶液中,可得到一对准可逆的氧化还原峰.电极反应受扩散控制.氧化峰电流与抗坏血酸浓度在5.0×10-6～1.1×10-3 mol/L范围内成线性关系,检测限为1.0×10-6 mol/L.该分析方法应用于果汁中的抗坏血酸分析,结果令人满意.     

呋喃妥因的伏安法测定

应用循环伏安法、微分脉冲伏安法对呋喃妥因在玻碳电极上的伏安行为及其测定进行了研究 .实验发现 ,在 0 .10 mol/ L的 HCl底液中 ,对其进行微分脉冲阴极溶出伏安扫描 ,于 - 0 .0 7V(vs.SCE)产生一还原峰可用于呋喃妥因的定量测定 .该还原峰的微分脉冲伏安峰电流与呋喃妥因的浓度在 5.0 0× 10 -7～ 3.0 0× 10 -5mol/ L范围内呈良好的线性关系 .对 1.0 0× 10 -5mol/ L的呋喃妥因溶液中进行 10次实验 ,该峰的峰电流相对标准偏差为 2 .6 8% .本方法检测限为 2× 10 -8mol/ L.     

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。     

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.     

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.