间苯二酚二-(2-氯-4-羟基苯基)醚的合成与抑菌活性初步研究

为了寻求优良的苯醚类新化合物抑菌剂,本文设计合成了新化合物间苯二酚二-(2-氯-4-羟基苯基)醚,其结构经1HNMR、IR、MS和元素分析证实,并且对其抑菌活性进行了初步测试,初步研究结果表明:此化合物对大肠杆菌,金黄色葡萄球菌,白色念珠菌,白色葡萄球菌,变形杆菌,卡他双球菌,青枯假单胞菌具有一定的抗菌活性。     

3-N-正烷基氨甲基-2,3-二氢萘并[2,1-b]吡喃-4-酮盐酸盐的合成

本文报告了3-N-正烷基氨甲基-2,3-二氢萘并[2,1-b]吡喃-4-酮盐酸盐(正烷基分别为甲基、乙基、正丁基、正己基)四种新化合物的合成。     

新型二氢化茚-咪唑衍生物的合成及生物活性研究

从1-茚酮出发,通过简洁的路线合成了15个结构新颖的二氢化茚-咪唑衍生物,并对合成的新化合物进行了抗肿瘤活性和抑菌活性的筛选.生物活性结果表明,化合物7、15、16和18具有较好的抗肿瘤细胞毒活性,其中化合物15对白血病(HL-60)、肝癌(SMMC-7721)及肺癌(A-549)的细胞毒活性甚至优于阳性药物DDP;化合物7、10、14、15、16和17对金黄色葡萄球菌(S.aureus)和枯草芽孢杆菌(B.sutbilis)均具有较好的抑菌活性,化合物8对金黄色葡萄球菌显示出较好的选择性抑制活性.     

天然产物Medicagenin 2的全合成及抑菌活性研究

以廉价的2,4-二羟基苯乙酮和对羟基苯甲醛为原料,经过苯环上的双异戊烯基化,酚羟基的保护,羟醛缩合和去保护基等反应,以30.3%的总收率完成天然产物Medicagenin 2的全合成.新化合物的结构都经过~1H-NMR, IR, MS确认.     

3-氨基-二氢噻吩-2-酮类Schiff碱的合成

目的研究合成新生物活性化合物。方法DL-高半胱氨酸硫内酯(3-氨基-二氢噻吩-2-酮)盐酸盐与取代苯甲醛反应,通过优化反应条件,得到3-氨基-二氢噻吩-2-酮类Schiff碱,新化合物结构进行了IR,1H NMR和元素分析。结果合成了6个未见文献报道的新Schiff碱类化合物。结论本文报道的合成方法具有反应条件温和,操作简便易于进行的优点。     

N-杂环-2，2-二甲基环丙烷甲酰胺类化合物的合成及表征

以2，2-二甲基环丙烷甲酸类化合物为先导化合物，合成了7种新的N-杂环2，2-二甲基环丙烷甲酰胺类化合物，所有新化合物经元素分析、^1H NMR确证，7种新化合物的产率较高，为43％～72％．     

4,4′-烃基亚甲基-双[3-(2,3,4,5-四氟苯基)-1-苯基-5-吡唑啉酮]的合成、结构及抑菌活性

由2,3,4,5-四氟苯甲酸为原料,经过酰氯化,与丙二酸二乙酯缩合,部分水解并脱羧,经环化合成了新化合物3-(2,3,4,5-四氟苯基)-1-苯基-5-吡唑啉酮,然后在微波辐射下与醛反应制备了4个新的4,4′-烃基亚甲基-双[3-(2,3,4,5-四氟苯基)-1-苯基-5-吡唑啉酮]化合物,并通过元素分析、IR、1HNMR及X-射线单晶衍射分析表征了其结构.化合物4c的晶体属三方晶系,R-3空间群.生物活性测试表明,该系列化合物对大肠杆菌有较好的抑制作用.     

N-(4-对氟苯基-4-芳胺基)-丁基-N′-二苯甲基哌嗪及其衍生物的合成

本文合成了N-对氟苯甲酰丙基-N′-二苯甲基哌嗪,并用它和芳香胺进行还原胺化反应,制备了一组标题化合物及其盐酸盐,目的是为了修饰心血管药物N-对氟苯甲酰丙基-N′-二苯甲基哌嗪的结构。这些化合物均为未见报导的新化合物,其结构得到了IR,~1H-NMR及MS等光谱证实。同时发现,在还原胺化反应中,亲核试剂芳胺的取代基对反应速度有明显的影响。     

植物病毒病化学防治剂1,7-二(取代苯基)二乙撑三胺的结构改造

以对烟草花叶病毒 TMV具有较好抑制作用的 1, 7-二 (取代苯基 )二乙撑三胺为先导化合物,合成了 4个未见文献报道的新化合物,这些新化合物有一定的抗病毒活性,其中化合物 (2)的活性最高,对烟草花叶病毒的抑制百分率达到 55％ .     

1-苯基-和1,2-二苯基-4-对氟苯甲酰丙基吡唑二酮-3,5的合成及其质谱研究

氟哌啶是一种具有较好“协同作用”的镇静药,我们曾将氟哌啶中的对氟苯甲酰丙基接到巴比吐酸类的结构上,合成了一类新的化合物。本论文是继上述工作之后,将对氟苯甲酰丙基接到吡唑酮结构的五员环上,又得到了两个新化合物,其合成方法:将2-对氟苯基-2-丙基-1,3-二噁戊烷接到丙二酸二乙酯上,然后在乙醇钠-乙醇作用下,分别与氧化偶氮苯和苯肼反应,得到的两个中间体再分别经适当的条件,进行酸性水解,即得到两个新化合物。经红外光谱、核磁共振光谱和质谱鉴定,证明这两个新化合物结构与我们预先给定的结构是一样的。     

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.