胡卢巴胶粗粉的流变性研究

通过测定和分析浓度、温度、剪切力、酸碱、冻融等变化对胡卢巴胶粗粉溶液粘度的影响及与黄原胶的协效性, 对胡卢巴胶粗粉的流变性进行了研究． 研究结果表明： 胡卢巴胶粗粉的粘度随浓度的升高而升高; 胡卢巴胶粗粉可分为冷水溶和热水溶两部分; 胶粘度随ｐＨ 值的降低而有所降低,随ｐＨ 值的升高呈跳跃式变化; 冷冻解冻变化使胶粘度稍有下降; 胡卢巴胶粗粉溶液为非牛顿流体,胡卢巴胶粗粉与黄源胶没有协效性     

苦豆子种子多糖与黄原胶的协效性研究

对苦豆子(SophoraalopecuroidesL )种子多糖(苦豆子胶)与黄原胶的协效性进行了研究.结果表明,不同配比的苦豆子胶与黄原胶混合后,其协效性不同,其中苦豆子胶与黄原胶的重量比为7∶3时,二者的协效性最高,混合液的粘度为黄原胶单溶液粘度的2倍左右,混合溶液为非牛顿流体,具有良好的触变性.研究结论是:苦豆子胶可作为黄原胶的复配胶应用于食品等工业领域.     

NK—01黄原胶和长角豆半乳甘露聚糖分子间的协效性研究

NK-01黄原胶和长角豆半乳甘露聚糖是两种天然生物多糖。两种多糖以适宜比例混和,溶液浓度达0.1%时,其溶液粘度分别是相同浓度单一多糖溶液粘度的13倍和40倍。当浓度增至0.2%时,溶液成凝胶,而相同浓度单一多糖溶液不成凝胶。表明两种多糖混和后经分子间相互作用,呈现极显著的协效增粘性和协效凝胶性。但其协效性受pH、无机盐和温度的显著影响。     

槐豆胶的急性毒性试验及槐豆胶与长角豆胶、瓜胶流变性的比较研究

用槐豆胶对小白鼠进行了急性毒性试验，并对槐豆胶与长角豆胶、瓜胶的粘度及与黄原胶的协效性进行了对比研究．试验表明，槐豆胶对雌性、雄性小白鼠经口试验均为无毒，并且槐豆胶粘度比长角豆胶稍低，比瓜胶高；槐豆胶、长角豆胶与黄原胶都有强烈的协效增稠性和协效凝胶性，而瓜胶则无此反应．由此表明，槐豆胶可作为食品添加剂，在一定程度上代替长角豆胶和瓜胶，应用于食品工业．     

槐豆胶的急性毒性试验及槐豆胶与长角豆胶,瓜胶流变…

用槐豆胶对小白鼠进行了急性毒性试验，并对槐豆胶与长角豆胶、瓜胶的粘度及与黄原胶的协效性进行了对经研究，试验表明，槐豆胶以雌性，雄性小白鼠经口试验均为无毒，并且槐豆胶粘度比长角豆胶稍低，比瓜胶高，槐豆胶，长产胶与黄原胶都有强烈的协效增稠性和协效交性，而瓜胶则无此反应，由此表明，槐豆胶可作为食品添加剂，在一定程度上代替长角豆胶和瓜胶，应用于食品工业。     

亚麻饼粕中亚麻胶的提取及其理化性质研究

采用水浸提法从亚麻饼粕中提取亚麻胶.通过单因素实验和正交试验,得到提取亚麻胶的最佳条件:料液比为1∶125,温度为70℃,提取时间为90 min,洗胶次数为1次.在此条件下亚麻胶的提取率可达32.0%.同时,研究了浓度、pH值、温度对亚麻胶溶液粘度及浓度对乳化率的影响.     

马铃薯羧甲基淀粉糊化特性研究

对马铃薯羧甲基淀粉糊性质进行了详细的研究,包括不同取代度羧甲基淀粉糊化温度,糊的冻融稳定性、透明度、抗霉生长能力及温度、浓度、回旋速度、pH值和介质对羧甲基淀粉糊粘度性质的影响.结果表明,马铃薯羧甲基淀粉具有低温易糊化,糊凝沉性弱,冻融稳定性好,抗霉能力强和透明度高的优良性质.氯化钠及钙离子对马铃薯羧甲基淀粉粘度性质有较大的影响.     

铝酸钠溶液的粘度

研究了溶液的温度、氧化铝质量浓度、苛性比αk等因素对铝酸钠溶液粘度的影响.研究结果表明:低温、高浓度、高苛性比及过饱和度较高的溶液粘度较大,反之则较小.这主要是因为溶液的温度、浓度和苛性比等因素影响了溶液中Al(OH)4-4与聚合铝酸根离子间的相互转变,从而影响了溶液的粘度;对实验数据进行多元线性拟合得到了溶液粘度与温度、浓度及苛性比的定量关系:lnη=-1.554 1.139αk 0.0187 2ρ-0.0503T.     

多糖复配技术对凝胶性能的影响

研究了魔芋葡甘露聚糖、卡拉胶、黄原胶等三种多糖之间的复配作用, 同时探讨了温度、时间、浓度、电解质各因素对凝胶性能的影响.结果表明: 多种多糖通过分子间力产生交互作用, 对多糖的凝胶性能(如凝胶强度、凝胶弹性)等具有良好的增效性.当魔芋葡甘露聚糖、卡拉胶、黄原胶三者共混质量比为1:0.4:0.2 (即 5.6%:2.2%:1.1%), 多糖总质量分数为9%, 温度为90℃、凝胶时间为10小时, K 浓度为1.0%时, 凝胶强度可达到最佳.     

鞘氨醇单胞杆菌Sphigomonas sp.WG产威兰胶的提取工艺研究

选用乙醇作为沉淀剂,对鞘氨醇单胞杆菌Sphigomonas sp.WG产威兰胶的提取工艺进行设计和优化。考察了发酵液加热处理、固液分离方式、乙醇用量、沉淀温度和沉淀时间对威兰胶提取量的影响,同时研究了3种不同干燥方式对威兰胶溶液粘度的影响。优化后的威兰胶醇沉工艺为:发酵液与乙醇的混合比例为1∶5.5(体积比),乙醇沉淀温度和时间分别为20℃和6 h,威兰胶沉淀物采用过滤分离,最后经真空冷冻干燥获得成品。     

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.