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Browsing Геология России by Title
Now showing items 7265-7284 of 39195
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(2002)The influence of metal ions, e.g. Co(II), Cu(II), Mn(II), Ni(II), Fe(II), on free radical concentration in humic acids isolated from soil, peat and compost was investigated by electron paramagnetic resonance (EPR). The ...
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(2000)The kinetics of calcite growth in the presence of Mg2 has been studied by both a pH free drift method and by visual observation. Our experiments show that the calcite growth rate is reduced by the presence of Mg2+. The ...
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INFLUENCE OF MICROHARDNESS OF BASIC MINERALS OF FERRUGINOUS QUARTZITES ON TECHNOLOGICAL PROPERTIES (2001)More than half an capital expenditure and operation costs is connected with crushing and grinding the ore in overall process of its treatment. Large consumption of electric energy is also required for crushing and grinding ...
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(2002)The potential for Mn oxides to modify the biogeochemical behavior of U during reduction by the subsurface bacterium Shewanella putrefaciens strain CN32 was investigated using synthetic Mn(III/IV) oxides (pyrolusite [β-MnO2], ...
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(1995)Deuterium-enriched amino acids occur in the Murchison carbonaceous chrondrite. This meteorite underwent a period of aqueous alteration with isotopically light water. With the objective of setting limits on the conditions ...
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(2004)Long-term direct current (DC) resistivity monitoring surveys are carried out to investigate structures and processes in the subsurface which are coupled to changes in electrical conductivity. Examples would be leaching ...
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(2001)We use Magnetic Resonance Imaging (MRI) to image the imbibition of water by capillary action in a right-cylindrical sample of a porous sedimentary rock with low iron content. In the method some 55 repeat images are taken ...
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(2005)The hydration state of a <2 μm fraction of Ca-saturated SWy-2 montmorillonite was characterised after rapid equilibration (3 hours) under pH-controlled conditions (0.1–12.6 pH range). The solution composition was monitored ...
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(2006)We measured hydrogen isotope compositions (δD) of high-molecular-weight n-alkanes (C27-C33) from grasses grown in greenhouses and collected from the US Great Plains. In both cases, n-alkanes from C4 grasses are enriched ...
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(2003)In order to accommodate growth of a grain, an equivalent volume of the surrounding material must be removed by deformation, displacement, or diffusion. Under certain conditions of stress, fluid pressure, and pore fluid ...
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(2003)The inter-well partitioning tracer test seemingly provides an attractive way of investigating the presence of non-aqueous phase liquids (NAPLs) in aquifers. Although the feasibility of this rather new technique has been ...
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(2003)The behaviour of an instrumented unstable slope in a profile of weathered overconsolidated clay has been analysed. Available field investigation data and laboratory tests were integrated in a coupled hydromechanical model ...
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(2003)The water retention properties of a calcareous soil containing rock fragments have been determined in the laboratory thanks to pressure plate measurements done on both the fine earth and the rock fragments from the soil. ...
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(2003)The daily GPS height series of the Medicina station were analyzed for the period July 1996-September 2001. The station is located in the middle Po Plain on fine-grained alluvial deposits. A seasonal oscillation in the order ...
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(1996)In a earlier paper (Su and Harsh, 1994), we presented a free energy of formation for imogolite based on solubility studies and including a formation constant for a monomeric, soluble aluminosilicate complex (Browne and ...
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(1997)Ligand-controlled dissolution of δ-Al2O3 and goethite in the presence of 8-hydroxyquinoline-5-sulfonate (HQS) has been observed as a function of the solution saturation state at constant pH and temperature. A continuous ...
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(1999)Metals sorbed to or coprecipitated with ferrihydrite can significantly inhibit transformation to more crystalline endproducts. We hypothesized that metals with a higher stability constant for a metal-ferrihydrite surface ...
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(2002)The influence of strain rate on the buckle folding behavior of an elasto-viscous layer-matrix model is explored by adopting an end-rotation method, which is capable of excluding the influence of initial geometric perturbation, ...
Now showing items 7265-7284 of 39195