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Browsing ELibrary by Title
Now showing items 1434-1453 of 21821
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(2000)A study combining information from infrared spectroscopy and adsorption experiments was carried out to investigate phthalate, trimellitate, and pyromellitate complexes at the goethite (α-FeOOH)/water interface. Infrared ...
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(2001)The difference between the climates of the Bering Land Bridge and Asiatic (western) Beringia 18–20 ka ago is discussed. The climatic reconstructions of the Bering Land Bridge and western Beringia are based upon two methods. ...
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(1997)Soils contain a diverse and complex set of chemicals and minerals. Being an 'open system', both in the chemical and nuclear sense, soils have defied quantitative nuclear dating. However, based on the published studies of ...
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(2002)Beryllium is an element thought to be largely associated with igneous and hydrothermal processes and the world’s major economic Be deposits are largely igneous or hydrothermal. However, metamorphic rocks also play a major ...
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(2002)This chapter addresses the portion of the geochemical cycle of beryllium that entails its transfer through the continental crust by the generation and migration of silicic magmas, which will be referred to loosely as ...
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(2004)By using accelerator mass spectrometry we have measured the 10Be concentrations of 86 Australasian tektites. Corrected to the time of tektite production ∼0.8 My ago, the 10Be concentrations (106 atom/g) range from 59 for ...
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BEZYMYANNYI ERUPTION ON MARCH 30, 1956 (KAMCHATKA): SEQUENCE OF EVENTS AND DEBRIS-AVALANCHE DEPOSITS (1998)A detailed reexamination of the deposits and comparison with the descriptions of the eruption revealed that on March 30, 1956, a collapse and a landslide 0.5 km3 in volume took place on the eastern slope of Bezymyannyi ...
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(1998)We investigate bias in surface-wave magnitude using the complete ISC and NEIC datasets from 1978 to 1993. We conclude that although there are some small differences between the ISC and NEIC magnitudes, there is no major ...
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(2001)Current biodiversity estimates suggest that modern coral reefs house between 4 and 5% of all described species, although increasingly sophisticated molecular techniques may reveal the actual diversity to be far higher. The ...
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(2001)The content and distribution of biogenic components (CaCO3 and SiO2am) and elements (Corg, N and P) and some metals (Fe and Mn) were investigated in the marine Holocene sediments of the Baltic Sea including the Curonian ...
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(1988)The golets zone in the mountains of southern Siberia occupies the summit belt of upland regions. Golets plants are enriched in many trace elements; the coefficient of biologic absorption, as calculated to the clarke for ...
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(1998)Dissimilatory iron-reducing bacteria (DIRB) couple the oxidation of organic matter or H2 to the reduction of iron oxides. The factors controlling the rate and extent of these reduction reactions and the resulting solid ...
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(2004)Manganese(IV) oxides produced through microbial activity, i.e., bio-genic Mn oxides or Mn biooxides, are believed to be the most abundant and highly reactive Mn oxide phases in the environment. They mediate redox reactions ...
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(2000)The biogeochemical signature of riverine matter in the Russian Arctic was investigated to establish a background for tracing terrestrial organic material in the Arctic Ocean. Elemental and lignin compositions of particulate ...
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(1989)In the past few years much attention has been given to studying the degree of preservation of the initial composition of the fossil skeletons of invertebrates. This is due to the fact that without corrective allowance for ...
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(2001)Data presented herein form part of a pilot study to reconstruct palaeoenvironment using isotopic data from 200 ka collagen and skeletal remains. To date such a study has only been possible on materials of up to 120 ka, due ...
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(1989)Studies of Au uptake by 194 plants and plant parts have permitted their classification into four groups according to their value for biogeochemical prospecting. Group 1, “nonbarrier”, contains 33 (17%) plant parts which ...
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(2003)Recent changes in our understanding of the mechanisms of chemical exchange and benthic flux in coastal systems has led to a paradigm shift in our assessment of chemical inputs to the ocean (Moore, 1999; Boudreau et al., ...
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(2001)Analysis of more than 25 000 plant samples, mostly rotted stumps and cones of Scots pine (Pinus sylvestris), has resulted in the discovery of several new types of platinum group metal (PGM) mineralization in weathered ...
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(1989)Work done between 1978 and 1985 on shows with high-grade silver-ore bodies revealed over 10 new barrier-free plant substances - the wood of 'old', including rotted stumps of Scotch pine, Dahurian and Siberian larch, Siberian ...
Now showing items 1434-1453 of 21821