加入阴、阳离子对高铁酸盐溶液稳定性的影响

将20种阴离子和11种阳离子分别加于pH=13、浓度为1.6×10-3mol/L的高铁酸盐溶液,发现IO4-、SiO32-、Li 、Ti4 等对溶液中的FeO42-有稳定作用;IO3-、ClO4-、Sn2 、Ba2 等对溶液中的FeO42-的稳定具有破坏作用.这一结果有助于提高高铁酸盐的稳定性,并对高铁酸盐正极材料的组成和添加剂的选取提供了实验依据.     

高铁酸盐对偶氮类染料的降解脱色研究

以电化学法制备的高铁酸盐对甲基橙、酸性铬蓝、铬黑T等偶氮类染料进行降解脱色.实验结果表明,经高铁酸盐处理后,偶氮染料红外谱图的主要谱峰消失,代之以CO32-的振动吸收峰;紫外光谱分析表明,染料的特征吸收峰逐渐减小直至消失.经对比,发现复合混凝剂FeO42-/Al(OH)4-比FeO42-对染料有更佳的降解脱色效果.     

高铁酸盐/Al(OH)3对偶氮类染料的降解脱色研究

以电化学循环伏安法研究了FeO42-、甲基橙、酸性铬蓝以及铬黑T等偶氮类染料的氧化还原电位.实验结果表明FeO42-有足够高的氧化电位来氧化偶氮类染料中的生色基团.用紫外-可见光谱法分析了FeO42-对甲基橙、酸性铬蓝、铬黑T等偶氮类染料的降解脱色行为.经高铁酸盐处理后偶氮染料类废水溶液中的有机成分逐渐减少,脱色率高于...     

未纯化高铁酸盐原液处理含硫废水的研究

用次氯酸盐氧化法制得的高铁酸盐,与次氯酸盐的碱性混合溶液,直接用于去除水样中的S^2-,比纯高铁酸盐,次氯酸盐效果更佳,将之用于25mg/L s^2-含量的油田采出水的净化脱硫,投放Na2FeO4 24．9mg/L,可达油田回注水标准,投放Na2FeO4 19.92mg/L,并外加微量助剂,可达到饮用水标准。     

亚铬酸盐法测定高铁酸钾之探讨

采用间接滴定原理,用亚铬酸盐法测定高铁酸钾。针对传统高铁酸盐分析方法的不足,.对滴定分析条件进行了优化研究,分析了测定过程中溶解固体、酸化、酸度、温度及亚铁浓度的选择等影响因素,给出高铁酸钾纯度、产率、浓度的计算方法,改进后的滴定法测定FeO42-的精确度得到明显提高,精度可提高5%。     

双阴极室隔膜电解制备高铁酸盐及其应用

采用双阴极室隔膜电解槽电解制备高铁酸钾,以铁丝网作为阳极材料,石墨碳棒作为阴极材料,两极室用Nafion117阳离子交换膜隔开.探索不同NaOH浓度、电解液成分、电流密度以及助剂对高铁酸盐产率的影响.并用制得的高铁酸盐降解苯胺,考察了pH值、反应时间、苯胺初始浓度以及高铁酸盐投加量对苯胺去除率的影响.助剂KIO 4、石墨和ZnCl 2的添加无法提高高铁酸盐的生成.在pH=10、n（苯胺）∶n（Fe）=1∶10、处理时间30 min的条件下,苯胺的去除率可达80.60%.     

阳离子聚丙烯酰胺-羧甲基纤维素电解质膜的制备及应用

以Fe3 为交联剂,制备了阳离子聚丙烯酰胺(CPAM)-羧甲基纤维素(CMC)聚合物电解质膜.用红外光谱和扫描电镜对其成分与形态进行了表征,并将其应用于电解制备高铁酸盐.实验结果表明,CPAM-CMC聚合物电解质膜能有效地阻止FeO42-向阴极室扩散,同时阴极室中生成的OH-及时地补充了阳极室中OH-的消耗.     

高铁絮凝剂的电合成及其在染料废水处理中的应用

以铂为阴极，铁（铝）为阳极，以Nafion117胺型SPE阴离子交换膜为隔膜，在饱和NaOH溶液中电解制备正六价的高铁酸盐絮凝剂（高铁/铝混凝剂）。在酸性溶液中，FeO2^2-氧化还原电位高达19V，具有强氧化性，可使有机染料降解。分光光度法和重铬酸钾法分析结果表明，经高铁絮凝剂和高铁/铝混凝剂处理后，甲基橙等染料降解脱色效果明显，对染料废水CODcr的去除率可达60%，     

复合高铁酸盐处理含Ag（CN）^-2、Zn（CN）^2-4配离子模拟废水的研究

用复合高铁酸盐处理含Ag（CN）^-2和Zn（CN）^2-4的配水，并讨论了不同反应条件对处理效果的影响。结果表明，重金属氰根配离子、重金属离子和氰离子的去除率都能达到96％以上。在水中的残留量都远低于国家排放标准。     

沉淀法分离Zn（Ⅱ）、Mn（Ⅱ）制备ZnO和MnO2的研究

在Zn2+、Mn2+混合溶液中,通过加入过量的氨和碳酸氢铵,用沉淀法将Zn2+、Mn2+离子分离,并制备了ZnO和化学MnO2.研究了氨和碳酸氢铵加入量、反应温度、静置时间等条件对沉淀分离效果的影响;通过正交设计实验得到了Zn2+、Mn2+分离的适宜条件为:NH3的用量比生成Zn(NH3)42+配合物的理论用量多20%,NH4HCO3 为理论用量,反应温度T=40 ℃,静置时间t =20 min.获得的ZnO和化学MnO2样品经分析纯度分别为98.6%和96.5%.     

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。     

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.