生命科学中的微催化作用研究：多糖的提取和信息催化作用

生命科学中的微催化作用研究多糖的提取和信息催化作用①廖代伟何苏雄林银钟陈鸿博陆健年黄遵楠黑美军曲榕（厦门大学化学系物理化学研究所固体表面物理化学国家重点实验室厦门３６１００５）关于糖化学的现代研究进展，最近，郭忠武等［１］作了很好的综述．业已提出了细...     

NC208型甲醇合成催化剂

ＮＣ２０８型甲醇合成催化剂＠杨意泉￥厦门大学化学系固体表面物理化学国家重点实验室ＮＣ２０８型甲醇合成催化剂杨意泉（厦门大学化学系固体表面物理化学国家重点实验室厦门３６１００５）ＮＣ２０８型甲醇合成催化剂是由厦门大学化学系和南化公司催化剂厂联合研制成功的．１...     

生命科学中的微催化作用研究──人参皂甙的提取和人参二醇的量子化学计算

生命科学中的微催化作用研究人参皂甙的提取和人参二醇的量子化学计算①廖代伟陆健年林银钟何苏雄黄遵楠（厦门大学物理化学研究所化学系厦门３６１００５）要在原子或分子水平上深入了解催化作用，除了传统的着眼于宏观的工业催化剂和工业催化过程的研制开发外，应更重视...     

休克尔矩阵图形方法研究金属表面的电荷密度与键级关系

休克尔矩阵图形方法研究金属表面的电荷密度与键级关系王银桂，杜俊民（厦门大学化学系）（国家海洋局第三海洋研究所）近几年，有关低维金属以及金属氧化物和硫化物导体材料的相结构与电荷密度（ＣＤＷ）的相互联系的报道愈来愈多￣［１，２，３］．我们曾在前义讨论了低...     

硫酸溶液中铂电极表面氧吸附过程的光电子能谱研究

硫酸溶液中铂电极表面氧吸附过程的光电子能谱研究徐富春，陈声培，薛国庆，孙世刚（分析测试中心，化学系，物化所，固体表面物理化学国家重点实验室，甘肃张掖师专化生系）电催化反应包含一系列表面吸附与脱附过程［１］．这些过程与电极表面结构密切相关。因此，深入研...     

氢在镍晶面上的吸附态研究

应用EHMO法研究镍上吸附氢的各种可能吸附态.结果表明,晶面上吸附氢原子(H~*)的势能变化均呈Morse函数形式,而由结合能计算值确定的相对有利吸附位,优先吸附面以及吸附热和扩散活化能等方面大体均能说明多数实验事实.     

用￣1HNMR法测定氘代溴苯的含量

用￣１ＨＮＭＲ法测定氘代溴苯的含量＠吴玉蓉＠陈民助＠吕实＠艾克惠用１ＨＮＭＲ法测定氘代溴苯的含量吴玉蓉陈民助吕实艾克惠（化学系）溴苯－ｄ５是合成氘代聚乙烯的中间体，为了研究氘聚乙烯的合成方法和工艺条件，氘溴苯产率的测定十分重要．我们探讨了用１ＨＮＭＲ谱测定...     

陶瓷湿敏元件老化机理探索

对陶瓷湿敏元件的老化机理作了分析,认为湿敏陶瓷都是由金属氧化物晶体构成,这些金属氧化物具有明显的离子性,易吸附有极性的媒质,除了能吸附水分子外,也能吸附有极性的污染物,形成憎水性表面,造成元件暂时性老化.同时在吸湿、脱湿过程中,多孔陶瓷表面会发生溶解、析晶和蒸发、凝结,使陶瓷表面态发生变化,表面活性降低,造成永久性老化.文中还着重介绍了提高陶瓷湿敏元件稳定性的措施.     

氢甲酰化铑催化剂立体化学的量子化学研究

氢甲酰化铑催化剂立体化学的量子化学研究廖代伟，林银钟，黄遵楠，彭亦如（化学系物理化学研究所固体表面物理化学国家重点实验室）均相和多相氢甲酸化反应及其催化剂自本世纪三、四十年代以来一直是催化界活跃的研究课题之一［１］．最近，徐奕德等［２］发表了关于氢甲...     

纳米晶304不锈钢腐蚀表面氧化物价态谱表征

采用X射线光电子能谱(XPS),对比研究了纳米晶304不锈钢(BN-SS304)和普通304不锈钢(CP-SS304)在6mol/L盐酸溶液中室温浸泡5d后表面氧化物纵向分布的价带谱。纳米晶304不锈钢价态谱曲线的强度高于普通304不锈钢的价态谱曲线,且纳米晶304不锈钢的价态谱曲线变化不明显,说明纳米晶304不锈钢氧化膜成分和电子结构稳定,也可能是由纳米晶304不锈钢致密的氧化膜引起的。普通304不锈钢表面氧化膜的价态谱曲线变化明显,有的峰位甚至消失,说明普通304不锈钢氧化膜疏松和有氧吸附,也可能是吸附的氧与其他原子作用影响峰位变化。这也为理解纳米晶304不锈钢在盐酸溶液中腐蚀的微观机制提供依据。     

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.     

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.     

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.