表面活性剂对水玻璃砂性能的影响

为比较表面活性剂和化学改性剂对水玻璃的改性效果,使用了表面活性剂十二烷基磺酸钠和化学改性剂聚丙烯酰胺对水玻璃进行改性.实验结果表明,水玻璃的黏度随表面活性剂和化学改性剂的加入量增加而减小.当表面活性剂加入量为0.6%(质量分数)时,水玻璃砂的抗压强度最高,与化学改性剂相比,表面活性剂的改性效果有所提高.当改性水玻璃加入量为4%(质量分数)时,在吹气时间短时十二烷基磺酸钠对水玻璃砂溃散强度的改善效果优于聚丙烯酰胺,而在吹气时间长时,聚丙烯酰胺对水玻璃砂溃散强度的改善效果优于十二烷基磺酸钠.     

表面活性剂对水玻璃砂性能影响研究

为了比较表面活性剂和化学改性剂对水玻璃的改性效果,使用了表面活性剂十二烷基磺酸钠和化学改性剂聚丙烯酰胺对水玻璃进行改性。实验结果表明：水玻璃的粘度随表面活性剂和化学改性剂的加入量而减小。当表面活性剂加入量为0.6%时,水玻璃砂的抗压强度最高,跟化学改性剂相比,表面活性剂的改性效果有所提高。当改性水玻璃加入量为4%时,在低吹气时间时十二烷基磺酸钠对水玻璃砂溃散强度的改善优于聚丙烯酰胺,而在高吹气时间时,聚丙烯酰胺对水玻璃砂溃散强度的改善优于十二烷基磺酸钠。     

改性海泡石填充不饱和聚酯复合材料的热性能研究

采用表面活性剂对海泡石进行改性，用DTA分析研究了改性剂种类及海泡石用量对不饱和聚酯复合材料热性能的影响．试验结果表明，海泡石的加入可显著改善不饱和聚酯复合材料的热性能，且阳离子表面活性剂改性海泡石填充效果较好．海泡石的最佳用量在8％-11％左右．     

改性纳米碳酸钙在硬质PVC中的应用性能

在172 d的贮存期内,对经表面活性剂改性的纳米碳酸钙的粒径变化进行了考察,并对其在硬质PVC中的应用性能进行了测试.结果显示,经合适的表面活性剂改性的纳米碳酸钙具有较好的贮存稳定性.经表面活性剂改性的纳米碳酸钙应用于硬质PVC之后,测试其力学性能,结果显示,添加纳米碳酸钙的PVC,其力学性能优于添加普通活性轻钙的.添加量相同时,添加纳米碳酸钙的PVC的拉伸强度比添加普通活性轻钙的高10%~15%;CaCO3质量分数<30%时,断裂伸长率提高一倍以上;冲击强度最大可提高2倍以上.如以同样的力学性能为指标,则纳米碳酸钙在硬质PVC中的添加量可显著地提高.     

新型钛酸酯偶联剂的应用研究

设计及合成了一类新型的钛酸酯偶联剂AEOT,用于改性超细CaCO3,系统研究了改性CaCO3的表面性能以及改性CaCO3/PVC复合体系的综合力学性能,并用扫描电子显微镜(SEM)对CaCO3/PVC复合材料的微观结构进行了分析,发现以分子量大的AEOT-15为改性剂对CaCO3进行表面活化处理,可显著改善CaCO3/PVC复合材料的综合力学性能.     

改性膨润土对水中敌百虫和敌敌畏的吸附性能研究

研究了用季铵盐阳离子表面活性剂四甲基氯化铵（TMAC）、四乙基氯化铵（TEAC）和十六烷基三甲基溴化铵（CTMAB）改性的膨润土对有机磷农药敌百虫和敌敌畏的吸附性能。结果表明，用阳离子表面活性剂改性的膨润土的层间距和有机碳含量与改性时所用表面活性剂种类有关；改性膨润土对水中敌百虫和敌敌畏的吸附能力优于原土，并且吸附量随阳离子表面活性剂碳链的增长而增大；同一长链阳离子表面活性剂改性的膨润土对敌敌畏的吸附能力大于敌百虫；温度升高不利于敌百虫和敌敌畏在改性膨润土上的吸附。     

碳氟表面活性剂改性活性炭对罗丹明染料的吸附性能

以十六烷基三甲基溴化铵、十二烷基硫酸钠、曲拉通、阴离子碳氟表面活性剂FS-62和非离子碳氟表面活性剂FS-3100为改性剂对颗粒活性炭进行改性,并将改性活性炭用于模拟废水中罗丹明B染料的吸附脱色性能研究。考察了活性炭吸附过程中改性剂种类、改性活性炭用量、吸附时间、体系温度等因素对活性炭吸附性能的影响。正交实验结果表明,碳氟表面活性剂FS-62改性活性炭用量为0.3 g/L、吸附时间为40 min、体系温度为70℃条件下,改性活性炭对罗丹明染料的脱色率较高。利用扫描电子显微镜分析了活性炭改性前后的形貌特征,并初步探究了FS-62改性活性炭对罗丹明染料的脱色吸附反应动力学特性。     

碱式碳酸镁的形貌对软质聚氯乙烯力学性能的影响

为了研究碱式碳酸镁(BMC)的形貌对软质聚氯乙烯(PVC)力学性能的影响,文中以六水氯化镁(MgCl_2·6H_2O)为前驱体分别合成了片状(s-BMC)和花球状(g-BMC)两种不同形貌的BMC,采用自制的聚醚型钛酸酯偶联剂(eTi_(4000))对它们进行了表面改性。并将改性前后的BMC分别加入软质PVC中,通过熔融共混法制备了一系列BMC/PVC复合材料,分析了BMC的形貌和表面改性对BMC/PVC复合材料力学性能影响。结果表明:eTi_(4000)改性可以提高sBMC和g-BMC的疏水性,且能进一步提高复合材料的力学性能。无论改性与否,s-BMC的增强效果均优于g-BMC;当BMC添加量为50份时,eTi_(4000)-s-BMC/PVC复合材料的杨氏模量和屈服强度分别达83. 5 MPa和14. 9 MPa,较基体PVC提高了509. 5%和238. 6%,力学性能得到较大幅度提升。s-BMC和eTi4000-s-BMC对软质PVC的增强效果具有重要实用价值。     

用改性粉煤灰处理表面活性剂废水的研究

研究了处理表面活性剂废水最佳改性剂、改性条件及处理的效果.通过实验方法确定HC l∶H2SO4（2∶1）的混酸为改性剂处理表面活性剂废水效果最佳;最佳改性条件为：改性剂与粉煤灰的用量为20 mL∶10 g,室温下搅拌60 m in;改性粉煤灰处理表面活性剂废水的最佳条件为：灰水比为10∶200（g∶mL）、pH值为7、室温条件下搅拌时间为40 m in;处理表面活性剂废水的去除率为：阴离子表面活性剂、阳离子表面活性剂、非离子表面活性剂的分别达到了95.50%、87.74%、94.20%.     

硫酸钙晶须的表面改性研究

采用硼酸酯表面活性剂SBW-181对硫酸钙晶须进行了单因素条件改性试验,分别考察了改性剂用量、改性温度、改性时间和搅拌速率等工艺因素对硫酸钙晶须表面改性的影响.试验结果表明:硼酸酯表面活性剂SBW-181对硫酸钙晶须的改性效果较好,在最佳工艺条件下,改性产品的活化指数为0.996,接触角为103.4°.建立了硼酸酯表面活性剂SBW-181与硫酸钙晶须的作用模型.得出的结论对硫酸钙晶须表面改性的工业化生产具有重要的指导意义,并为硫酸钙晶须的应用研究奠定了理论基础.     

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.