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Browsing ELibrary by Title
Now showing items 8184-8203 of 22185
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NORMAL ALKANES IN METEORITES: MOLECULAR δ13C VALUES INDICATE AN ORIGIN BY TERRESTRIAL CONTAMINATION (2001)In the time period since 1961, n-alkanes (straight-chain hydrocarbons) have been detected in varying amounts in many meteorites. Proposed origins for these compounds have included extraterrestrial biotic, extraterrestrial ...
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(2004)The problem of developing a normal model of the electric conductivity of the continental lithosphere is currently at the level of discussion, despite more than half a century of the deep electromagnetic sounding. In the ...
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(2003)Burial histories of the eastern, central and western parts of the Northern Caucasus basin are reconstructed on the basis of well data and seismic sections. Subsidence began in the Early Triassic after the Late Carbonifer ...
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(1996)This paper continues the description of volcanic activity at the Northern group of Kamchatkan volcanoes since 1935. The period described embraces the years of 1990, 1991, and 1992. The paper describes the evoluton of ...
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(2003)The possibility that ice-free areas existed during the late Weichselian glaciation of the Svalbard archipelago has been debated for several decades. This study reveals the first geologic evidence that nunataks existed on ...
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(2001)Multichannel seismic reflection data, acquired by MAGE in 1990, provide the first view of the geological structure of the East Siberian Sea between 76.5–80N and 152–164E. This northwestern part of the East Siberian Margin ...
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(2002)The theoretical scaling of near-field peak ground acceleration and peak ground velocity with moment magnitude, Mw , is found using an L model of rupture. This scaling matches well with the magnitude scaling of recent ...
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(1991)Five novel ethylene-linked polymethyl-substituted phenyl/naphthyl or naphthyl/naphthyl hydrocarbons have been identified in aromatic hydrocarbon fractions of immature Tertiary coals using liquid chromatography, gas ...
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(2003)The main developments taking place in Nuclear Magnetic Resonance Spectroscopy (NMR) of quadrupolar (spin 1 > 1/2) nuclei with half integer spins in solids, particularly clays and other layered materials, have been reviewed. ...
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(2005)Stable isotopes and trace elements in foraminifera shells are important for determining the paleochemistry of the ocean, and Mg/Ca ratios and delta(18)O values in foraminifera have recently been used to determine simultaneously ...
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(1996)Five out of seven marine microalgal species investigated were found to biosynthesize nonhydrolysable, mainly aliphatic, biomacromolecules (algaenans). The molecular structure of the algaenan isolated from the microalga ...
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(2006)Новое плауновидное Novgorodendron conophorum gen. et sp. nov., по морфологии листовых подушек занимающее промежуточное положение между семействами Sublepidodendraceae Chaloner et Boureau и Lepidodendraceae Endlicher, описано ...
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(2001)Based on tephrochronological studies the Novo-Bakening Volcano was dated Early Holocene, and its Holocene activity was reconstructed. A composite section was compiled for the tephra of the area with the description of ...
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(2004)The paper reviews the work done in the course of the COST 271 Action concerned with the development of tools and methods for forecasting, nowcasting and warning of ionospheric propagation conditions. Three broad categories ...
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(1997)When Li-saturated montmorillonite is heated to 200-300 ~ the Li ions migrate from inter- layer positions to sites in the layer structure. However, the identity of these sites has not been clearly established. Here we have ...
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(2002)The proton Magnetic Resonance Sounding (MRS) is a geophysical technique specially designed for hydrogeological applications. It is based on the principle of Nuclear Magnetic Resonance (NMR) and allows the non-invasive ...
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(2003)Zunyite [Al13Si5O20(OH,F 18Cl] possesses an unusual combination of an Al13O16(OH)24 Keggin structure and a Si5O16 pentamer unit. We used 19F, 27Al, 29Si MAS and 27Al MQMAS NMR spectroscopy of a series of samples with varying ...
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(2004)This review describes nuclear waste forms for high-level waste (HLW), that is, glasses, ceramics, and glass-ceramics, as well as for low- and intermediate-level waste (LILW), that is, cement, bitumen, glass, glassy slags, ...
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(1989)When gold interacts under natural conditions with microorganisms, it is either concentrated, or dispersed. Our experiments have already shown that heterotrophic microorganisms can generate 'new' gold both on its original ...
Now showing items 8184-8203 of 22185