二元芳胺的双重氮盐与二茂铁的反应

由二茂铁与二元芳胺的双重氮盐的芳基化反应,得到了几种二茂铁衍生物。由双重氮化的联苯胺得到橙色的4-二茂铁基联苯,m.p.162.5—163.5℃,和橙紅色的4,4′-双二茂铁基联苯,260℃分介,产率分別为7.4％和8.5％。由隣联二茴香胺的双重氮盐得到4-二茂铁基-3,3′-二甲氧基联苯,m.p.162—164℃;产率9％。由对苯二胺的双重氮盐得到苯基二茂铁,产率9％。     

双二茂铁基醇与甲苯二异氰酸酯合成聚氨酯及其性质研究

将含有双二茂铁基的二元仲酵与甲苯二异氰酸酯反应,合成相应的聚氨酯,研究了反应时间对反应产物分子量的影响.通过元素分析、红外光谱、核磁共振对聚合物的结构进行表征,用凝胶渗透色谱(GPC)测定了聚合物的分子量,用差热-热重(DTA-TGA)研究了聚合物的热性能,用循环伏安法测定了聚合物的氧化还原性质.研究结果表明,含双二茂铁基聚氨酯的热稳定性比没有引入双二茂铁基的聚氨酯有明显提高,与双二茂铁基丙烷相比,其在相同电化学反应条件下更易被氧化.     

偕-双(丙基二茂铁基)烷烃燃速催化剂的研究

合成和表征了三种新型燃速催化剂:偕-双(丙基二茂铁基)甲烷,2,2-双(丙基二茂铁基)丙烷和2,2一双(丙基二茂铁基)丁烷,研究了上述化合物和偕-双(甲基及乙基二茂铁基)烷烃衍生物的电化学性能,探讨取代基和偶联基团对其催化性能的影响,对它们的迁移性与国内目前常用的叔丁基二茂铁(TBF)做了比较试验。     

含丙基桥联双二茂铁的α,β-不饱和羰基衍生物的合成及电化学性质

甲酰基丙基桥联双二茂铁和乙酰基丙基桥联双二茂铁分别与不同的芳香族羰基化合物在氢氧化钠催化下进行Aldol缩合,可简便地得到含丙基桥联双二茂铁的α,β-不饱和羰基衍生物,产率均在86%以上.产物结构经1HNMR,IR及质谱进行了表征.用循环伏安法对标题化合物的电化学性质进行了研究,电化学数据表明该类化合物均呈现出双核甚至多核电化学不等价性特征.     

6-丙酰基-6′-丁酰基(2,2-双二茂铁基丙烷)及其还原产物的合成与表征

以2,2-双二茂铁基丙烷为原料,经两步酰化合成6-丙酰基-6'-丁酰基(2,2-双二茂铁基丙烷),酰化产物分别以LiAlH4和Zn-Hg作为还原剂进行还原,得到相应的6,6'-不同α-羟烷基和6,6'-不同烷基取代的衍生物,利用元素分析、IR及1HNMR对化合物结构进行了表征.     

1,4-二(4-甲酰氯基苯甲酰基)苯的合成与表征

以甲苯、对苯二甲酰氯(TPC)为原料,无水三氯化铝为催化剂,通过亲电取代反应合成1,4-二(4-甲基苯甲酰基)苯(DMBB),产率为82%.在吡啶/水混合体系中用高锰酸钾将DMBB氧化得到1,4-二(4-甲羧基苯甲酰基)苯(DMBA),产率为85%.DMBA与二氯亚砜在DMF催化下反应合成1,4-二(4-甲酰氯苯甲酰基)苯(DMBC),产率为85%.3步总产率为59%.用FT-IR、1H NMR和元素分析等对化合物进行了表征.研究表明:化合物具有预期的结构和较高的纯度.     

某些二茂铁基—甲酰二茂铁烷衍生物的紫外光谱研究

报道了某些甲酰二茂铁基丙烷及其α，β－不饱和酮衍生物的紫外光谱特征，即在２０２～２０６ｎｍ处与已知的二茂铁取代衍生物相比有不同寻常的强吸收，空间电子效应为其主要影响因素     

手性二茂铁基β-氨基醇的合成及其在醛酮对映选择性反应中的应用

从二茂铁和廉价易得的L-缬氨酸、苯丙氨酸出发,合成了4个手性氨基醇衍生的二茂铁基β-氨基醇.研究了它们对醛的不对称加成和前手性酮不对称氢转移反应的对映选择性.特别在钌催化的苯乙酮的不对称氢转移反应中,二茂铁基氨基醇4b以最好99.1%的产率和74.2% e.e.值,得到产物R-1-苯-1-乙醇.而用与4b对应的α-胺基膦氧化物5催化时,化学产率和e.e.值分别为51.5%和41.1%.     

手性二茂铁基β-氨基醇的合成及其在催化硼氢化钠／碘对潜手性酮的不对称还原反应中的应用

从二茂铁和廉价易得的L-缬氨酸、苯丙氨酸出发,合成了4个手性氨基醇衍生的二茂铁基β-氨基醇. 研究了它们在催化硼氢化钠/碘对苯乙酮的不对称还原反应的对映选择性. 结果表明:二茂铁基氨基醇4、5和6都能诱导得到优势加成产物R-1-苯基-1-乙醇. 其中4b以最好89%的产率和65% e.e.值得到产物,而用与4b对应的α-胺基膦氧化物5和6催化时,化学产率和e.e.值分别为81%和38%, 82% 和32%.     

两种二茂铁Schiff碱衍生物的合成及其表征

在温和条件下合成了2种新的二茂铁基Schiff碱衍生物, 甲酰基二茂铁缩2,4-二硝基苯腙(Ⅰ)及乙酰基二茂铁缩2,4-二硝基苯腙(Ⅱ), 采用现代谱学手段如元素分析、红外光谱、紫外光谱、核磁共振氢谱等对其进行表征.     

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.