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see ArchaebacteriaArchaebacteria
, diverse group of bacteria (prokaryotes), sometimes called the archaea and considered a major group unto themselves. Archaebacteria are contrasted with the Eubacteria, from which they differ biochemically in the arrangement of the bases in their ribosomal RNA and
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Comparative characteristics of physical properties of rocks from the Archaean complex occurring deeper than 6842 metres are of particular interest.
The icy orb known as Enceladus may boast ideal living conditions for single-celled microorganisms known as archaeans found in some of the most extreme environments on Earth, they reported in the science journal Nature Communications.
Cox, "Progressive fault triggering and fluid flow in aftershock domains: Examples from mineralized Archaean fault systems," Earth and Planetary Science Letters, vol.
The topics include the nitrogen cycle in the Archaean as an intricate interplay of enzymatic and abiotic reactions, the organization of respiratory electron transport chains in nitrate-reducing and nitrifying bacteria, the transport and assimilation of inorganic nitrogen in bacteria, the assembly of respiratory proteins of the nitrogen cycle, the physiology and regulatory mechanisms of nitric oxide metabolism, and nitrous oxide production in the terrestrial environment.
The study area is underlaid by the Archaean crystalline rocks with undulating topography (Fig.1).
One shows a microbial community from an anaerobic lake from the Archaean Eon, and the other shows a community from a current aerobic lake.
Kilimapesa Gold's project is situated in the Migori Archaean Greenstone Belt
Topics include: Plutonism versus Neptunism, the sanukitoid series, the geochemistry of Archaean plagioclase-rich granites as a marker of source enrichment and depth of melting, chemical structure in granitic magmas, and more.
Lens-like bodies of Archaean megacrystic anorthosite (e.g., Fiskenoesset, Bad Vermillion Lake), for example, likely formed through flotation of plagioclase phenocrysts during in situ fractional crystallization of basaltic parental magma (Windley et al.
During this period in its history, known as the Archaean, the Earth was covered by a poisonous smog of methane, ammonia and other toxic gases.