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Browsing ELibrary by Title
Now showing items 7192-7211 of 21934
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(2000)Differences in pH between silicate–biofilm interfaces and bulk medium (ΔpH=pHinterface−pHbulk) were detectable with commercial microelectrodes in cultures grown in unbuffered medium (|ΔpH|=0.27–1.08) for an arthrobacter ...
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(2002)Analytical techniques with high sensitivity and high spatial resolution are crucial for understanding the chemical properties of complex earth materials and environmental samples, and these so-called 'microprobes' have ...
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(2004)Microphytological remains from Riphean deposits of the Mezen syneclise (Leshukon depression) have been Eudied in 115 core samples characterizing in detail a sedimentary section penetrated by deep borehole Srednyaya Nyafta ...
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(2001)Silicided microfossils from the Middle Riphean Svetlyi Formation of the Riphean hypostratotype in the Uchur-Maya region of southeastern Siberia are described for the first time. Cherts are discovered to enclose only simple ...
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(2002)Organic-walled microfossils from the Riphean hypostratotype of Siberia (the Uchur-Maya region), which represent the Early Riphean Uchur (Omakhta) and Late Riphean Ui (Kandyk and Ust'-Kirba) microbiotas, are considered. The ...
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(2003)New materials studied (over 200 samples) and published data critically analyzed are used to specify composition of organic-walled microfossils and to elucidate their vertical and lateral distribution in the Upper Riphean ...
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(1994)Silicified shallow-water marine carbonate deposits of the Proterozoic Debengda Formation (the Olenek Uplift, northeastern Siberia) contain well preserved microfossils. One or two distinct assemblages consists only of ...
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(1989)The microfossils of the genus Obruchevella, established by Ye. A. Reytlinger in the lower Paleozoic and Vendian deposits of the Siberian craton and for a long time unknown elsewhere, have recently attracted ever-increasing ...
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(2003)First-order reversal curve (FORC) diagrams have been experimentally shown to be a better way of discriminating domain states in a sample compared to the straightforward use of major hysteresis loops. In order to better ...
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(2003)Glacial deposits at the margins of the ice cap of the northern island of the Novaya Zemlya archipelago, Russia, contain numerous spherules and rare scoriaceous particles thought to be extraterrestrial. The 1 Kyr old glacier ...
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(1988)The authors investigated the lithology and geochemistry of the deposits of the diamond sequence in the interval from limestone L1 to coal 14 in area with various degrees of postdiagenetic alteration (the metamorphic grade ...
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(1989)We are the first to have obtained information concerning the effect of thermophilic organisms on the behavior of gold. The air of our work was to find microbic and algal-bacterial coenoses and ascertain their role in ...
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(2004)This study deals with the reticulate microornamentation of Late Devonian and Early Carboniferous conodont elements. This ornamentation pattern is considered to represent the imprint of secreting epithelial cells. The basic ...
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(2004)The absence of new mineral material from the Moon has caused a loss of interest in the mineralogical problems of the Earth's nearest neighbor. However, the application of new high-precision apparatus for study of the lunar ...
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(2005)Noctilucent clouds play an important role in the physics of the summer polar mesopause. They consist of tiny ice crystals with characteristic dimensions smaller than 200 nm. However, neither exact shape of particles nor ...
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(1998)The BET and micropore surface areas of different size fractions of four different unweathered alkali feldspars were calculated using gas adsorption data. BET surface area decreased with increasing grain size. Micropore ...
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(2005)The frameworks of zeolites and related crystalline microporous oxide materials, such as aluminophosphates, silicoaluminophosphates and metaloaluminophosphates, are built up of tetrahedrally coordinated (e.g., Si, Al, P) ...
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(2002)High-resolution compositional mapping and dating of monazite on the electron microprobe is a powerful addition to microstructural analysis and an increasingly important tool for tectonic analysis. Microprobe monazite ...
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(2003)We report in situ measurements of O-isotopic compositions of magnetite, olivine and pyroxene in chondrules of the Ningqiang anomalous carbonaceous chondrite. The petrographic setting of Ningqiang magnetite is similar to ...
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(2003)Current radiometric remote sensing technology enables high resolution data of vegetation biomass to be obtained in the form of the Normalized Difference Vegetation Index (NDVI). The present study uses such data to examine ...
Now showing items 7192-7211 of 21934