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Browsing ELibrary by Title
Now showing items 1167-1186 of 21879
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(2003)Microwave techniques are widely used in acid digestion of solid samples. Their use in the extraction of organic analytes from environmental samples is less widespread, despite commercial devices being available for this ...
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(1998)For contouring the relief of small palaeontological or sedimentological objects the method of Shadow Moire Topography, already successfully applied in other fields, is recommended. When a whitened three-dimensional object ...
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(2001)In order to examine contamination in the Chungnam Coal Mine area, rock, stream sediment and water samples were collected and analyzed for trace elements. In order to compile the drainage-based geochemical maps, catchment ...
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(2000)Garnet-biotite experiments now exist from Ferry and Spear (1978, FS), Perchuk and Lavrent'eva (1983, PL), and Gessmann et al. (1997, GE). Recent garnet Margules parameters exist from Berman and Aranovich (1996, BA), Ganguly ...
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(2002)A new technique for the analysis of low-frequency seismic recordings is introduced with which constraints on the Earth's large-scale aspherical structure can be obtained. The technique, which we call 'regionalized multiplet ...
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(2000)A curvilinear regression method earlier developed by us [Varadachari, C., Kudrat, M., Ghosh, K., 1994. Evaluation of standard free energies of formation of clay minerals by an improved regression method. Clays Clay Miner. ...
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(2001)Electron transport properties of single crystal and polycrystalline natural mineral galena (PbS) samples from the Trepča mine, Yugoslavia, were determined using the photoacoustic frequency transmission technique. Their ...
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(2004)The theory (or method) of similarity and modeling is widely applied in science and in technical applications (Venikov 1976). If a limited amount of experimental data is at disposal and if they are processed in a dimensionfree ...
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(2004)We present an application of the spectral-element method to model axisymmetric flows in rapidly rotating domains. The primitive equations are discretized in space with local tensorized bases of high-order polynomials and ...
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(1995)U-Xe and U-Kr ages of pitchblendes and uraninites are compared with isotopic U-Pb ages and chemical U-Pb ages calculated from electron microprobe data. It is shown that the U-Xe and U-Kr systems are helpful for the ...
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(1997)A fast EDXRF analysis by using radioisotope, 241Am as an exciting source and high-purity Ge as a planar detector in heavy rare earth separation processes by solvent extraction has been investigated. Applying the method, ...
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(2002)The isotope composition of Ph is difficult to determine accurately due to the lack of a stable normalisation ratio. Double and triple-spike addition techniques provide one solution and presently yield the most accurate ...
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(2002)Volcanic tremor and long-period (LP) events are characterized by sharp spectral peaks that generally result from resonance effects at the source and which concentrate most of the radiated energy. The understanding of these ...
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(2003)High-resolution and ultra-high-resolution X-ray computed tomography are rapid, non-destructive and extremely powerful techniques for three-dimensional examination and measurement of a great variety of geological materials ...
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(2001)The world is faced with increasing demands for high-quality drinking water and for removal of contaminants from municipal, agricultural, and industrial wastewaters. Treatment is required to obtain drinking water from most ...
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(2002)This paper illustrates the potentialities and the innovative character of surface analysis techniques such as nuclear microprobe analysis (NMA) and X-ray photoelectron spectroscopy (XPS) in the research field of humic ...
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APPLICATIONS OF NONSTATIONARY STOCHASTIC THEORY TO SOLUTE TRANSPORT IN MULTI-SCALE GEOLOGICAL MEDIA (2003)In this study, we make use of a nonstationary stochastic theory in studying solute flux through spatially nonstationary flows in porous media. The nonstationarity of flow stems from various sources, such as multi-scale, ...
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(2002)Petroleum geochemistry improves exploration efficiency by accounting for many of the variables that control the volumes of crude oil and natural gas available for entrapment, including source-rock distribution, richness ...
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(1997)New analytical techniques are utilized that permit the precise and accurate measurement of Pt-190-Os-186 isotope systematics. These techniques are applied to three different systems: sulfide ores associated with the 251.2 ...
Now showing items 1167-1186 of 21879