Browsing ELibrary by Title
- DSpace Home
- →
- Геология России
- →
- ELibrary
- →
- Browsing ELibrary by Title
JavaScript is disabled for your browser. Some features of this site may not work without it.
Browsing ELibrary by Title
Now showing items 7621-7640 of 22924
-
(2004)The effect of microorganisms on the fate of Cd introduced into the soil as cadmium oxide (CdO) was investigated. Cadmium oxide (875 µg Cd per gram of soil) was added to γ-irradiated (sterile) and non-sterile soils. The ...
-
(1997)Numerous early diagenetic siderite concretions previously described have been interpreted as the results of microbially mediated reactions. Interpretation of oxygen isotope data for such material requires an understanding ...
-
(2003)Microbial sulfate reduction is thought to stimulate carbonate precipitation in modern stromatolites, yet whether this metabolism was important in shaping Precambrian stromatolites is unknown. Here we use geochemical modeling ...
-
(2001)The importance of different anaerobic processes leading to CH4 production in rice paddies is quantified by a combination of experiments and model. A mechanistic model is presented that describes competition for acetate and ...
-
(2003)Fossil bacterial remains from black carbonate shales of the Sinsk Formation from the Lower Cambrian of the Siberian Platform are studied. The main types of fossil microbial remains found in these strata are described.
-
(2002)Although the flux of molecular O2 between the atmosphere and the subsurface is intrinsically linked to the net soil production of greenhouse gasses, few studies have focused on the controls affecting the isotopic composition ...
-
(1997)This experimental study investigated the processes by which microbes interact with oxyhydroxide mineral surface coatings using an approach designed to better represent the conditions of natural subsurface environments. The ...
-
(1997)Previous studies of ordinary chondrites (OC) reported isolated microchondrules within the fine-grained or clastic matrix of many type-3 samples; larger sets of microchondrules have also been found as rare clasts in type-3 ...
-
(2004)Microcodium is a problematic calcitic microfeature of many calcretes and calcareous paleosols in the Cretaceous and Tertiary continental and marine successions of the peri-Tethyan realm. The main controversy about the ...
-
(1990)The matter that ascends toward mid-ocean ridge because of large-scale mantle circulation (on the order of the dimensions of the lithospheric plates) undergoes partial fusion. The result is the accumulation of a layer of a ...
-
(1988)This article presents and discusses the results of analyses of microcrystalline chrome spinellids from rocks of the alkalic ultramafic series in the Maymecha-Kotuy and the Karelia-Kola regions and from kimberlites, chiefly ...
-
(1985)The very fine-grained (≃1 μm) polygonal microcrystalline texture occurring in the groundmass of pseudotachylite veins in the Harris meta-anorthosite and its variation with position are described and an origin by crystallization ...
-
(1999)In situ noble gas analyses using a laser microprobe with a beam diameter of 50-100 μm were performed on thin slices of Murchison and Yamato (Y-) 791198 CM carbonaceous chondrites in order to see microdistribution of ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
-
(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 ...
Now showing items 7621-7640 of 22924