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| 1 | Geochemical characterization of Cretaceous sandstones from the Southern Benue Trough, Nigeria显示文摘Geochemical studies of sandstones from the three lithostratigraphic successions in the southern Benue Trough of Nigeria were undertaken for a geochemical characterization of the sandstones, and to assess their strati-graphic and source evolution. Major and trace elements data were obtained from outcrop sandstone samples. The SiO2/Al2O3, Fe2O3/K2O ratios and CaO contents have been used to characterize the Cretaceous sandstones into Al-rich and high and low Fe2O3/K2O ratio sandstones. Results indicate that there are geochemical features that display stratigraphic trends across the succession from the Asu River Group, Eze-Aku Group to the proto-Niger Delta succession which may imply a discontinuous evolution from different source terrains of Precambrian and Mesozoic ages that supplied the sediments. The Asu River Group sandstones have lower SiO2, Al2O3, Fe2O3 and higher MgO; the Eze-Aku sandstones have higher TiO2, CaO, alkalis and lower MgO while the proto-Niger Delta sandstones have higher SiO2, Al2O3, Fe2O3 and lower alkalis and CaO. These discontinuities signify the influence of tectonic impulses that af- fected the southern Benue Trough during the Cretaceous time. Changes in ratios of TiO2/Al2O3, Fe2O3, Cr and Zr suggest an increasingly mafic contribution to the depositional basin with time. The chemical index of alteration increases with time, possibly suggesting that a more intense weathering regime in the hinterland developed with time. | Odigi M.I. Amajor L.C. | 2009 | Chinese Journal Of Geochemistry2009,28,1: | 9 |
| 2 | 激光显微探针^(40)Ar/^(39)Ar定年系统显示文摘K-Ar定年中的^(40)Ar/^(39)Ar方法,使样品经快中子辐射,产生^(39)K(n,P)^(39)Ar反应,经适当校正后的^(40)Ar/^(39)Ar,用以下公式计算出年龄:T=1/λln[1+J×^(40)Ar/^(39)Ar]其中,λ为^(40)K的衰变常数(5.543×10^(-10)a^(-1)),J为转化系数,对^(39)K(n,p)^(39)Ar是通过与未知样品一同照射的已知年龄的样品计算求得的.激光显微探针^(40)Ar/^(39)Ar是在常规^(40)Ar/^(39)Ar方法上发展起来的,它与常规^(40)Ar/^(39)Ar相比,具有更多的优点:精度更高,用样量更少,由此解决了由于样品不均匀引起的问题. | 穆治国 M.I.卡尔宾柯 | 1994 | 科学通报1994,39,8: | 7 |
| 3 | 三角形穿孔翅片对自然对流传热的强化作用显示文摘研究一种设置水平矩形翅片对自然对流传热的强化作用,翅片内含三角形穿孔,三角形的底边平行并朝向翅片顶端.比较了这种多孔翅片和同等实心翅片的热耗散率.考虑的参数包括翅片及其穿孔的几何尺寸和热性能.讨论了翅片穿孔后引起的传热强化和翅片重量的减轻.结果表明,在某些三角形穿孔和穿孔间距的值域内,穿孔翅片改进了同等情况实心翅片的热耗散.当翅片导热率及其厚度增大时,穿孔翅片的传热也强化. | A.H.艾尔伊莎 M.I.艾尔威甸 林建忠 吴承平 | 2008 | 应用数学和力学2008,29,8: | 5 |
| 4 | INDUCTION PLASMA REACTIVE DEPOSITION OF TUNGSTEN CARBIDE FROM TUNGSTEN METAL POWDER显示文摘Experimental results are reported on the primary carburization reaction between the tungsten powder and methane in the induction plasma, and the secondary carburiza tion of the deposit on substrate at high temperature. Optical microscopy and scanning electron microscopy were used to examine the microstructures of starting tungsten powder, carburized powder, and deposit. X-ray diffraction analysis, thermal gravimet ric analysis and microhardness measurement were used to characterize the structures and properties of the powder and the deposit. It is found that the primary carbur ization reaction in the induction plasma starts from the surface of tungsten particles when the particles are melted. Tungsten particles are partially carburized inside the reactive plasma. Complete carburization is achieved through the secondary carburiza tion reaction of the deposit on substrate at high temperature. | X.L. Jiang Institute of Surface and Coatings Technology, Central South University, Changsha 410083, China M.I. Boulos Department of Chemical Engineering, University of Sherbrooke, Sherbrooke, J1K 2R1, Canada | 2001 | Acta Metallurgica Sinica(English Letters)2001,14,5: | 4 |
| 5 | Thermal and Magnetic Peculiarities of Metal-Containing Carbon Nano-Phase Formed in the Reaction of Fine-Dispersed Aluminium with Dichlorethane in Paraffin Medium显示文摘 | Hikmet C. Ibrahimov Joerg F. Friedrich Etibar H. Ismailov Eldar B. Zeynalov Aygun Z. Aliyeva Nadir M.I. Seidov Musa I. Rustamov | 2012 | 材料科学与工程(中英文A版)2012,2,2: | 3 |
| 6 | Response surface analysis and simulation as a tool for bioprocess design and optimization显示文摘 | S.J. Kalil F. Maugeri M.I. Rodrigues | 2000 | Process Biochemistry2000,,6: | 3 |
| 7 | Direct Numerical Simulation of Convective Heat Transfer in a Zero-Pressure-Gradient Boundary Layer with Supercritical Water显示文摘Experimental research has long shown that forced-convective heat transfer in wall-bounded turbulent flows of fluids in the supercritical thermodynamic state is not accurately predicted by correlations that have been developed for single-phase fluids in the subcritical thermodynamic state. In the present computational study, the statistical properties of turbulent flow as well as the development of coherent flow structures in a zero-pressuregradient flat-plate boundary layer are investigated in the absence of body forces, where the working fluid is in the supercritical thermodynamic state. The simulated boundary layers are developed to a friction Reynolds number of 250 for two heat-flux to mass-flux ratios corresponding to cases where normal heat transfer and improved heat transfer are observed. In the case where improved heat transfer is observed, spanwise spacing of the near-wall coherent flow structures is reduced due to a relatively less stable flow environment resulting from the lower magnitudes of the wall-normal viscosity-gradient profile. | C. Azih J.R. Brinkerhoff M.I. Yaras | 2012 | Journal of Thermal Science2012,21,1: | 2 |
| 8 | Tomato Fusarium wilt suppressiveness. The relationship between the organic plant growth media and their microbial communities as characterised by Biolog ?显示文摘 | C. Borrero J. Ordovás M.I. Trillas M. Avilés | 2006 | Soil Biology and Biochemistry2006,,7: | 2 |
| 9 | Antioxidant activities of Sechium edule (Jacq.) Swartz extracts显示文摘 | A.A.L. Ordo?ez J.D. Gomez M.A. Vattuone M.I. lsla | 2005 | Food Chemistry2005,,3: | 2 |
| 10 | 古代奥林匹克运动会史话显示文摘第一章古代和现代一八七○年九月一日,也就是在拿破仑三世向普鲁士宣战后不到八个星期的日子,法国在色当的战役中遭到了惨败。九月四日法兰西宣布废除帝制,成立资产阶级共和国,十天后,巴黎宣布了投降,紧接着,普鲁士又侵占了法国的阿尔萨斯和洛林两地区。这一系列的失败给法国带来了极度的和长期的黑暗,但是,这也给现代奥运会的产生提供了温床。据说拿破仑一世的代表队在伊顿的一些运动场上输掉了那些决定性的比赛。这种不幸情况的产生是由于当时在法兰西的公立学校中,教学大纲的制定过分强调了智育而忽视了体育,同时学校中没有体育场,学生几乎没有参加体育锻炼和比赛的机会。正因为如此,男爵顾拜旦感到十分担忧。在色当失守的时候,他年仅八岁,但是一达到法定的年龄,他就开始为改变法兰西人的体质作出了不懈的努力。 | M.I.芬利 H.W.普拉克特 阮光明 | 1980 | 上海体育学院学报1980,4,2: | 2 |
| 11 | 二甲基二硫氨基甲酸钠对有色金属硫化矿选择性浮选作用的研究显示文摘采用无沫浮选试验研究二甲基二硫氨基内对有色金属硫化矿的浮选机理,用紫外分光光度计测定药剂在矿物表面的吸附量,应用红外光谱、批描电子显微镜查明浮选矿物表面的吸附成分和性质,研究二甲基二硫氨基甲酸钠从硫化矿物表面解吸丁基黄药的能力以及在矿物表面形成的各种疏水层。研究结果为铅锌矿、铜镍磁黄铁矿的浮选建立新药剂制度提供依据。 | V.A.格林金 M.I.曼特塞维奇 周廷熙 | 1999 | 国外金属矿选矿1999,36,9: | 2 |
| 12 | Comparison of semirobust and robust partial least squares procedures显示文摘 | M.I. Griep I.N. Wakeling P. Vankeerberghen D.L. Massart | 1995 | Chemometrics and Intelligent Laboratory Systems1995,,1: | 2 |
| 13 | determinant buying attitude:Mean-ing and Measurement显示文摘 | J.H.Myers M.I. Alpert | | 0,,: | 1 |
| 14 | Thermal analysis and design of a volumetric solar absorber depending on the porosity显示文摘 | M.I. Roldán O. Smirnova T. Fend J.L. Casas E. Zarza | 2014 | Renewable Energy2014,,: | 1 |
| 15 | Application of region-based segmentation and neural network edge detection to skin lesions显示文摘 | M.I. Rajab M.S. Woolfson S.P. Morgan | 2003 | Computerized Medical Imaging and Graphics2003,,1: | 1 |
| 16 | Sulfate reduction during the acidification of sucrose at pH 5 under thermophilic (55<ce:hsp sp='0.25'/>°C) conditions. II: Effect of sulfide and COD/ SO 4 2 - ratio显示文摘 | S.I.C. Lopes M.I. Capela P.N.L. Lens | 2010 | Bioresource Technology2010,,12: | 1 |
| 17 | High-resolution electron microscopy of microstructure of SrTiO 3 /BaZrO 3 bilayer thin films on MgO substrates显示文摘 | S.B. Mi C.L. Jia M.I. Faley U. Poppe K. Urban | 2007 | Journal of Crystal Growth2007,,2: | 1 |
| 18 | Effect of COD/SO 4 2? ratio and sulfide on thermophilic (55<ce:hsp sp='0.16'/>°C) sulfate reduction during the acidification of sucrose at pH 6显示文摘 | S.I.C. Lopes X. Wang M.I. Capela P.N.L. Lens | 2007 | Water Research2007,,11: | 1 |
| 19 | Carbothermic reduction kinetics of nanocrystallite Fe 2 O 3 /NiO composites for the production of Fe/Ni alloy显示文摘 | K.S. Abdel-Halim M.H. Khedr M.I. Nasr M.Sh. Abdel-wahab | 2008 | Journal of Alloys and Compounds2008,,1: | 1 |
| 20 | Olive oil and health: Summary of the II international conference on olive oil and health consensus report, Jaén and Córdoba (Spain) 2008显示文摘 | J. López-Miranda F. Pérez-Jiménez E. Ros R. De Caterina L. Badimón M.I. Covas E. Escrich J.M. Ordovás F. Soriguer R. Abiá C. Alarcón de la Lastra M. Battino D. Corella J. Chamorro-Quirós J. Delgado-Lista D. Giugliano K. Esposito R. Estruch J.M. Fernandez- | 2009 | Nutrition Metabolism and Cardiovascular Diseases2009,,4: | 1 |