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Browsing ELibrary by Title
Now showing items 5743-5762 of 21253
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(2003)The influence of F substitution on the local structure of Al in the tetrahedral and octahedral sheets of synthetic Al-rich phlogopite samples with nominal gel compositions of K(Mg3-xAlx)[Al1+xSi3-xO10] (OH)y(F)2-y between ...
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(2004)The influence of grinding on colour and particle-size properties of talc and smectite from a white bentonite were studied and compared with a fine-grained calcite from a chalk. Grinding decreased the grain size of all three ...
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(1996)The most important solution chemical controls on weathering rates are the pH and concentration of chelating ligands. Here, data from controlled laboratory experiments are used to highlight pertinent differences between ...
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(2001)Influence of molecularly sorbed reagents on formation of flotation complex of particle-bubble has been investigated. Results of the investigations have shown that presence of the reagents leads to increase in speed of fluid ...
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(2001)The paper considers the influence of deep and subsurface heterogeneities on the parameters of seismic signals from earthquakes. Evaluation of degree of influence of the above heterogeneities on the calculated parameters ...
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(2003)To understand the behavior of octahedral hydroxyl-stretching modes (VOH) as a function of increasing tetrahedral layer charge, infrared and Raman spectroscopic studies were carried out on a series of synthetic saponites. ...
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(1998)Evidence is presented to support the hypothesis that the natural impulsive electromagnetic field of the Earth (NIEMFE) involves pulses of lithospheric origin that are generated by seismic and microseismic ground motion. ...
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(2003)Several mechanisms have been proposed to explain the interactions between proteins and mineral surfaces, among them a combination of electrostatic, stereochemical interactions and molecular recognition between the protein ...
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(2002)The influence of melt on the creep behavior of olivine–basalt aggregates under hydrous conditions has been investigated by performing a series of high-temperature triaxial compression experiments. Samples with melt fractions ...
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(2004)Abstract The magnetic susceptibility of ordered and partially disordered manganogrunerites (composition Ca0.1Mn1.9Mg1.25Fe3.562+Fe0.383+Si7.81O22(OH)2 and Ca0.24Mn1.57Mg2.27Fe2.762+Fe0.323+Si7.84O22(OH)2) has been measured ...
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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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(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 ...
Now showing items 5743-5762 of 21253