单体3,5-二(4-叠氮丁氧基)苯甲酸甲酯的合成与表征

目的：单体分子3,5-二（4-叠氮基丁基）苯甲酸甲酯的合成与表征。方法：采用3,5-二羟基苯甲酸甲酯与叠氮化钠发生亲核取代反应及与卤代烷发生“Williamson”醚化反应,从而形成合成单体分子,该分子叫做3,5-二（4-叠氮基丁基）苯甲酸甲酯。通过1H NMR和FTIR对合成单体进行结构表征。结果：在大量的1,4-二溴丁烷中添加3,5-二羟基苯甲酸甲酯的DMF溶液,反应48个小时后,得到产物3,5-二(4-叠氮丁氧基)苯甲酸甲酯和3,5-二(4-溴丁氧基)苯甲酸甲酯。结论：3,5-二羟基苯甲酸甲酯与叠氮化钠发生亲核取代反应及与卤代烷发生“Williamson”醚化反应,能够形成3,5-二（4-叠氮基丁基）苯甲酸甲酯。     

3,5-二羟基苯甲醇的合成工艺改进

以3,5-二羟基苯甲酸为原料,经酰化、硼氢化钠,碘还原体系还原,合成了3,5-二羟基苯甲醇.改进后的工艺操作简便,成本低廉,有利于工业化生产.     

3,5-二羟基苯甲醇简便合成方法砥究

以3,5-二羟基苯甲酸为原料,经酰化、硼氢化钠还原体系还原,合成了3,5-二羟基苯甲醇.该方法成本较低,后处理简单,无环境污染,为标题化合物提供了一条较为简便的合成方法.     

氮氧化吡啶-2-甲醛缩3,5-二苄氧基苯甲酰腙及其Zn(Ⅱ)配合物的合成、表征与生物活性

合成了氮氧化吡啶-2-甲醛缩3,5-二苄氧基苯甲酰腙及其Zn配合物,通过元素分析、质谱、红外光谱、核磁共振氢谱、摩尔电导等对化合物进行了表征,测试了配体和配合物的抗菌活性.结果表明Zn配合物的形成,改善了配体氮氧化吡啶-2-甲醛缩3,5-二苄氧基苯甲酰腙的抗菌活性.     

一种合成3,5-二(吡啶-4-甲氧基)苯甲酸的新方法

以3,5-二羟基苯甲酸乙酯为原料,在一定的条件下与4-氯甲基吡啶盐酸盐反应,合成3,5-二(吡啶-4-甲氧基)苯甲酸.研究发现,当使用N,N-二甲基甲酰胺(DMF)作为反应溶剂时,目标产物的产率可达到65%.同时,通过傅立叶变换红外光谱(FT-IR)、核磁共振氢谱(1H NMR)等技术手段对目标产物3,5-二(吡啶-4-甲氧基)苯甲酸的结构进行表征.     

Cu(Ⅱ)、8-羟基喹啉和羟基苯甲酸三元配合物的合成与表征

合成了Cu(Ⅱ)、8-羟基喹啉和羟基苯甲酸三元配合物,通过元素分析、摩尔电导、红外光谱、X-射线粉末衍射、热分析等手段对其性质进行了表征.     

光稳定剂3,5-二叔丁基-4-羟基-苯甲酸-2,4-二叔丁基苯基酯的合成

研究了以3,5-二叔丁基-4-羟基-苯甲酸和2,4-二叔丁基苯酚为原料,SOCl2为酰化试剂,一锅法合成光稳定剂3,5-二叔丁基-4-羟基-苯甲酸-2,4-二叔丁基苯基酯的工艺.通过实验考察了投料比、温度及酰化试剂用量对反应的影响,确定了较佳的工艺条件:3,5-二叔丁基-4-羟基-苯甲酸与2,4-二叔丁基苯酚的物质的量比为1∶1.1;酰化剂SOCl2与3,5-二叔丁基-4-羟基-苯甲酸的物质的量比为1.2∶1;反应温度为70℃;反应时间为11 h.还考察了结晶溶剂的种类、用量和温度对产品质量和收率的影响,得到了较佳的结晶工艺条件:V(正丁醇)/m(初产物)为1.4 m L/g;结晶温度为25℃.产品总收率可达83.0%.     

超分子8-羟基喹啉/3,5-二硝基水杨酸的合成、晶体结构及抑菌活性

以8-羟基喹啉和3,5-二硝基水杨酸合成了一种黄色的超分子化合物,用X-射线衍射法确定了其晶体结构,大量的分子内和分子间氢键使此超分子化合物结构得以稳定。抑菌活性测试发现此超分子化合物的抑菌活性明显高于8-羟基喹啉和3,5-二硝基水杨酸,其中对枯草芽孢杆菌的抑菌效果最好。     

多羟基对苯二甲酸合成工艺研究

多羟基对苯二甲酸类化合物在功能材料及医药上的应用研究得到广泛关注.选择了2,6-二羟基对苯二甲酸的合成工艺进行研究,得到了较佳的工艺参数,常压Kolbe-Schmitt以3,5-二羟基苯甲酸与甲酸钾为原料反应,反应温度为180-190℃,反应时间4小时,m(3,5-二羟基苯甲酸):m(HCOOK)=1:5.46,收率为87,32%.其工艺具有操作简便,安全,环境友好的特点,适合于工业化.     

新型二氮冠醚臂式衍生物的合成与表征

合成了对羟基苯甲酸乙酯双侧臂取代的二氮杂18-冠-6衍生物L1,在盐酸中水解得到了对羟基苯甲酸双侧臂取代的二氮杂18-冠-6衍生物L2,用元素分析、红外光谱和核磁共振谱对新大环化合物进行了表征.     

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.