双水相萃取技术分离纯化生物活性物质研究——(I)魔芋葡甘露聚糖纯化及改性研究

对不同方法纯化魔芋葡甘露聚糖进行了研究,酶法结合乙醇沉淀法是最佳提纯魔芋葡甘露聚糖的方法。对提纯的魔芋葡甘露聚糖进行了改性,对比了改进魔芋葡甘露聚糖、魔芋葡甘露聚糖和魔芋精粉的溶胶特性和稳定性,其中以改性魔芋葡甘露聚糖的溶胶特性和稳定性最佳。     

十二烷基硫酸钠催化合成氯乙酸异丙酯

研究了十二烷基硫酸钠催化氯乙酸与异丙醇酯化反应中各种因素对酯化率的影响．在醇酸摩尔比1．2／l、催化剂用量1．0％(以酸的摩尔数计量)、反应时间2．5h、反应温度为回流温度以及5mL苯作为带水剂的反应条件下，酯化率可达97．2％．与其他酯化催化剂相比较，十二烷基硫酸钠的催化活性与硫酸氢钠、对甲苯磺酸等Bronsted酸相当，比大多数Lewis酸的催化活性高．由FTIR方法推测出十二烷基硫酸钠水解生成的硫酸氢钠在催化过程中起到了关键性作用．     

有机膨润土的制备及其测试表征

为使膨润土能够在塑料中应用,需对膨润土有机化处理．以山东潍坊膨润土为原料,采用湿法提纯得到高纯度的膨润土,经无水碳酸钠钠化后选择不同的改性剂对其有机化处理,最终制备出有机膨润土,经测试分析表明：采用湿法提纯后,在65℃下加入质量分数为10％的Na2CO3恒温反应2h可得到钠基膨润土;在70℃条件下加入质量分数为20％的十八烷基苄基二甲基氯化铵和己内酰胺复合改性剂,调节pH为6后反应1．5h抽滤、干燥、粉碎后可得到改性效果优良的有机膨润土,其层间距可达到2．44nm．     

聚乙二醇催化合成取代苯氧乙酸

水做溶剂，聚乙二醇-800做催化剂，苯酚的衍生物与氯乙酸在碱性条件下，加热回流制备取代苯氧乙酸．当反应物的浓度是3．5mol／L，苯酚衍生物与氯乙酸的摩尔比是1：1．1，反应时间是1h，合成了4种取代的苯氧乙酸，都获得了高产率．其中，4．氯苯氧乙酸产率95．2％，2，4-二氯苯氧乙酸产率91．4％．     

功能性魔芋酸乳制备工艺的优化

研究以魔芋精粉和鲜牛奶为原料制备功能性酸奶的工艺优化,采用磷酸法提纯魔芋精粉并以直投式发酵剂进行发酵。在单因素实验的基础上,通过Box-Benhnken响应面法得出功能性魔芋酸乳制备的最佳工艺条件为：糖添加量6．14％,发酵剂添加量6.71％,魔芋精粉添加量0．43％,发酵时间4h。直投式发酵剂具有类型多、活力强的优点,采用此发酵剂制备魔芋酸乳的过程简单,容易推广。     

高锰酸钾改性煤基活性炭催化合成环己酮乙二醇缩酮

以高锰酸钾改性煤基活性炭为催化剂合成了环己酮乙二醇缩酮，并获得了较好的合成条件，即n（环己酮）；n（乙二醇）=1：1．5，催化剂用量为总反应物料质量的3．3％（环己酮质量的6．5％），以8．0mL环己烷为带水剂，反应时间为2．5h，产率为89．6％．实验结果表明，该催化剂容易获得，可回收使用。具有较高的催化活性．     

TiSiW12O40/TiO2催化合成氯乙酸正丁酯

首次以固载杂多酸盐TiSiW12O40/TiO2为多相催化剂，通过氯乙酸和正丁酸反应合成了氯乙酸正丁酯，并探讨了诸因素对产率的影响。实验表明：TiSiW12O40/TiO2具有良好的催化活性，醇酸物质的量比为1．4：1，催化剂用量为反应物料总量的2．0％，反应时间0．5h，反应温度130－139℃，产率可达66．51％。     

化学冷烫剂的制法

化学冷烫剂是一种无毒无害的冷烫剂,并且冷烫时间短、不用电、对毛发无断无叉的一种较安全、使用方便的理想烫发剂。1制法（1）氯乙酸2kg氯乙酸中加入5kg水,并不断搅拌下使氯乙酸溶解,待完全溶解后滴加纯碱溶液（用适量的水把纯碱溶解）,调节氯乙酸溶液的pH值至6－7为止。（2）硫脉硫腺1．6kg中加水skg,并倒入搪瓷桶中,加热,再加入已中和好的氯乙酸溶液,继续升温至85－90℃,不断搅拌半小时,然后用倾斜法留下沉淀物。归）氰化钡氰化钡s．zxg中加入固体烧碱1．65kg（30％烧碱溶液5．skg左右）,放在搪瓷桶中,再加入硫腺溶液15kg,…     

关于魔芋防病丰产栽培技术

洋县位于陕西省南部汉中市东端，年平均气温14．5℃，降水量799．2mm，相对湿度77％，日照时数1840．3h。魔芋是丘陵山区发展经济的优势产业，全县常年种植魔芋1333．33hm^2，总产2万t。     

药用高分子辅料魔芋葡甘露聚糖的实验研究

目的:介绍魔芋葡甘露聚糖的实验研究,探讨其应用开发前景.方法:以魔芋粉为原料,对葡甘露聚糖的粗提、精制、纯化、物化性质、含量测定、毒性试验以及应用等方面的研究结果进行总结.结果:魔芋葡甘露聚糖理化性质稳定,安全性较高.结论:葡甘露聚糖可作为药用辅料开发,尤其在速释制剂辅料和辅助用药方面,值得进一步研究.     

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。     

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.