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Browsing ELibrary by Title
Now showing items 7481-7500 of 21768
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(2003)Synchrotron X-ray photoelectron As 3d and S 2p spectra of gersdorffite reveal that the surface monolayer includes two types of surface anionic species, As-S dimers and As-S multimers (probably tetramers), the latter being ...
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(2000)Monitoring of subsoil volumetric radon activity in the Paratunka geothermal field began in late October 1997. The aim of this work was to find correlation between the Rn behavior and the geodynamic environment in Kamchatka. ...
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(1997)Clay fractions and glauconite (clays) lose 30-80% of the 39Ar produced by the nuclear transformation 39K(n, p)39Ar during irradiation in a reactor. As a result it has not been possible to date clays by the 40Ar-39Ar ...
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(2000)Shock recovery experiments of plagioclase feldspar in contact with pyroxene, shock-loaded at 36-53 GPa, showed that monomineralic glass of plagioclase was mixed with brecciated pyroxenes with virtual absence of mixed-mineral ...
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(2002)The progress in cladistics promoted the revival of the concept of the monophyletic origin of mammals. The discovery of the Early Cretaceous monotreme Steropodon in Australia gave impetus to the development of these ideas. ...
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(2004)Compounds of the meta-autunite group containing monovalent cations (Li, Na, K, Rb, Cs, Ag, TI) have been synthesized by diffusion in gels or by hydrothermal methods, and their crystal structures determined. Single-crystal ...
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(2002)Both the density of terrestrial hot spots and their associated buoyancy flux show non-random distributions. These distributions are bimodal and symmetric about the equator with maxima occurring between 20 and 30° latitude. ...
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(2002)The currently adopted rainfall-based design flood estimation techniques, for example the Design Event Approach, do not account for the probabilistic nature of the key variables except for the rainfall depth. This arbitrary ...
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(1996)The thermodynamic and structural properties of H2OCO2 mixtures along two supercritical isotherms at 773.15 and 1073.15 K in the pressure range from 0.2 to 30 kbar have been investigated by the NVT and NPT Monte Carlo ...
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(2003)The ordering of Al3+, Fe3+, and Mg2+ cations along the octahedral sheet in dioctahedral 2:1 phyllosilicates was studied theoretically. The distribution of Fe3+/Mg2+ was studied in the octahedral sheet and is compared with ...
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(2003)In this study, a Monte Carlo simulation method is applied to study groundwater flow and solute transport in heterogeneous, dual-porosity media. Both the hydraulic conductivity and the interregional mass diffusion rate are ...
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(1989)The authors have discovered in the Katanga-Tetere interfluve extensive reserves of mordenite, produced by post-sedimentary transformation of ashy tuffs of intermediate composition. The particle-size distribution of the ash ...
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(2002)Examines the chemical distinction between epidote and clinozoisite. Efficacy of optical mineralogy for chemical analysis; Contribution of Daniel E. Kile, geologists, on the definition of chemical composition of the minerals; ...
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(2003)The morphology, systematics, and ecology of bivalves are discussed. Changes in the taxonomic composition and morphogenesis of this group in the Phanerozoic are traced. Several ethological-trophic groups are characterized, ...
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(2002)The morphogenesis and homologies of the major skeletal structures of crinoids and similar Early Paleozoic echinoderms are analyzed on the basis of comparative morphological analysis. The study of symmetry and asymmetry in ...
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(2001)Microorganisms of the Baikal Rift are of peculiar interest owing to their isolated evolution and the ancient origin of Lake Baikal. Samples of rocks sedimented at various stages of the Baikal Rift development have been ...
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(2004)Morphological and histological aspects of conodont element regeneration are considered on the basis of material from the Late Devonian and Early Carboniferous. It is shown that the regeneration mechanism of conodonts ...
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(2002)We relate reverse fault scarp morphology formed by several earthquake dislocations to the average deformation rate, using a morphological dating model based on a diffusion analogue of erosion. Our scarp degradation model ...
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(2001)The air photographs of the craters of Kamchatkan volcanoes, collected during the last three decades, were decoded, photogrammetrically processed, and interpreted to recognize the features and phenomena which can be used ...
Now showing items 7481-7500 of 21768