复合催干剂的研制

介绍了五种三元复合催干剂的制备及在醇酸清漆中的性能 ,结果表明该复合催干剂性能优异 ,可代替传统的钴锰铅钙锌五元体系 ,并简化工艺 ,降低成本 ,其中环保无铅化配方值得大力推广。     

改性氧化淀粉胶粘剂的制备

介绍了以NaClO氧化玉米淀粉粘合剂的制备工艺，采用聚乙稀醇及膨润土作催干剂，再加填料、防腐剂等．提高了干燥速度，有效地解决了该胶稳定性差、贮存期短的问题．     

红外差谱法用于涂料催干剂的结构鉴定

本文应用红外差谱技术，计算机检索技术及多组分定量软件对聚氨酯涂料催干剂进行定性和定量分析。     

WKF复合淀粉粘合剂的研制

本介绍了在一般淀粉粘合剂的基础上，采用氧化改性法，通过添加快干剂、活化剂及催干剂，制备WKF复合淀粉粘合剂的配方、工艺流程，阐述了快千机理。     

有机酸皂化法制备高效稀土元素Ce油漆催干剂的研究

文章采用有机酸皂化法制备了高效稀土元素Ce油漆催干剂。文章系统地研究了高效稀土元素Ce油漆催干剂的制备方法,以及反应温度、反应时间、pH值等因素对催干剂性能的影响。结果表明:采用异辛酸、NaOH、CeCl3、200#溶剂、水及相应助剂为主要原料制备的高效稀土催干剂,其各项技术指标都达到国家标准,能够满足高档涂料的使用要求;反应温度、时间和pH值对催干剂的金属含量具有明显影响,当反应的温度在81℃;皂化反应时间为240min、pH值为9.0;置换反应时间在180min、PH值为5.5时,催干剂金属含量可达6.3g。     

异辛酸锰的合成研究

对漆料催干剂异辛酸锰的多步合成条件进行了分析研究,提出了用既是沉淀剂又是皂化剂的氢氧化钡代替氢氧化钠,同时投料,同时反应,一步直接合成目标产品的合成路线.产品产率较好,催干效果优良.此法简化了工艺流程,缩短了合成时间,有利于提高产量,增加效益,合成全过程无铅等有毒金属的使用和排放,对环境无污染,对人体无伤害.     

代钴/铅稀土复合催干剂的研制

随着涂料工业的发展,漆用催干剂的品种正在更新。用稀土催干剂全部取代传统的铅锰锌钙催干剂,不仅有利于消除铅污染,而且可充分利用稀土资源。然而,稀土催干剂必须和钴催干剂同时使用,如此仍然无法摆脱钴金属资源日益枯竭、价格昂贵和依赖进     

单组分聚氨酯清漆的研制

本文研制的单组分聚氨酯清漆是由豆油、季成四醇、苯酐，经醇解、酯化，再与甲苯二异氰酸酯反应，加入催干剂制备而成。该涂料与醇酸树脂涂料相比，具有干燥时间短、耐磨性好、光泽高，耐水解性及耐酸、盐、碱性较好的特点。     

南—RMC油漆催干剂

一、引言油漆催干剂是一种能促使漆膜干燥的物质,俗名燥液。它能促进干性油膜的吸氧及聚合作用。例如:亚麻仁油未加催干剂时,其涂膜要6～8日后才干结,且干后不爽。加入催干剂后,在15小时后即可干结成膜,油膜光滑爽快不粘手,干燥成膜的时间,比没有催干剂快,这样便于施工,又防止了灰沙雨露的沾污和破坏。一般使用的油漆催干剂,主要是钴、锰、铅、锌、钙的环烷酸盐。俗称钴皂、锰皂、铅皂……上述五种金属皂。按照它们在油漆催干剂中的作用可分为二类,即氧化聚合催干剂——钴皂、锰皂、铅皂和辅助催干剂——锌皂、钙皂。     

双乙酰合成新工艺研究Ⅰ．缩合法合成双乙酰

本文用亚硝酸乙酯与２－丁酮缩合制备双乙酰－肟。由于肟的水解反应为可逆反应，本文拟定了双乙酰－肟边水解边蒸馏新工艺，结果表明，该工艺较传统的先水解后蒸馏的双乙酰合成法重量收率提高８％左右。本文还对双乙酰－肟水解的可能机理提出了建议。     

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.