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Browsing ELibrary by Title
Now showing items 6667-6686 of 21934
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(2002)Trend analysis is widely used for detecting changes in hydrological data. Parametric methods for this employ pre-specified models and associated tests to assess significance, whereas non-parametric methods generally apply ...
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(2002)The substitution in layered double hydroxide-like phases (LDH) of composition (Co2+1-y Cu2+y)2Al3+(OH)6Cl · n H2O (0 y 1) was studied by X-ray diffraction and X-ray absorption spectroscopy. It was found that the lamellar ...
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(1989)The special features of this investigation are as follows: 1) we use readily accessible data; 2) the prediction is truly local, and the locations of the fields are determined within about 75 km; 3) the effectiveness of the ...
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(1990)The prediction of petroleum and natural gas fields (especially very large ones) is a very interesting scientific problem and a highly important economic tasks. Other publications by the present writers using examples from ...
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(2004)Pyrope-knorringite garnets, Mg3(Al1-X Cr3+X)2Si3O12 with X=0.25, 0.50, and 1.00, were synthesized between 9 and 16 GPa and 1300 and 1600 °C, using multianvil high-pressure techniques. The garnets with X=0.25 and 0.50 are ...
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(1997)Stratigraphic investigations of the Precambrian in Karelia and the Kola Peninsula, which are the type area for the pre-Riphean part of the Proterozoic of northern Eurasia, demonstrate a priority of local stratigraphic ...
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(2001)Recent seismological observations reveal the presence of seismic anisotropy in localized regions at the base of the mantle within an otherwise isotropic lower mantle. These regions can be placed in a tectonic context, ...
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(2001)The incorporation of hydrogen (deuterium) into the coesite structure was investigated at pressures from 3.1 to 7.5 GPa and temperatures of 700, 800, and 1100 °C. Hydrogen could only be incorporated into the coesite structure ...
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(1999)The use of a direct crystallographic technique is reported for locating Cr atomic sites in a mullite containing 11.5 wt% Cr 2 O 3 by monitoring variations in characteristic X-ray emission rates as a function of fast electron ...
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(1998)The loess/paleosol sequences of Central Asia are continuous terrestrial records of the Quaternary period and enable detailed comparison with paleoclimatic archives such as marine and ice core records in order to reconstruct ...
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(1999)Loess rocks are widespread on the Earth. They occupy about 10% of global land area. Their thickness reaches up to 300 m in places and even more. Loess rocks differ in the different parts of the Earth. The 'warm' and the ...
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(1988)According to the Second Law of Thermodynamics, 'natural processes tend from less probable to more probable states,' and we use the entropy of a system as a measure of the thermodynamic probability P of its state. For this ...
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(2003)A paradox of volcanology is that the most fundamental part of its knowledge – the observation of volcanic processes and objects – is less strict and less well organized compared with experimental and theoretical approaches ...
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(2003)Base-hydrolyzed sterols and long-chain alcohols of a marine eustigmatophyte, Nannochloropsis gaditana have been studied. Sterol composition of N. gaditana is similar to that of other member of this genus, with predominance ...
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(1996)Data from literature have been verified and new estimates have been obtained for the total volumes of erupted material, average productivities, life spans, and other parameters of Kamchatkan volcanic centers that operated ...
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(2004)A series of Cr-substituted goethites with (Cr:Fe molar ratio up to 0.12) were prepared. Thermal analysis of the solids indicates the formation of cation-deficient compounds that are more stable towards the transformation ...
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(2001)Measurements performed by means of tiltmeters and extensometers in special-purpose underground observatories are an important part of the research on the crustal kinematic parameters in the northern Tien Shan. Long runs ...
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(2001)Measurements performed by means of tiltmeters and expansometers in special-purpose underground observatories are important part of the research of the crustal kinematic parameters in the northern Tien Shan. Long runs of ...
Now showing items 6667-6686 of 21934