Archaea

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Archaea

Evolutionary biology
One of the three domains of living organisms: Archaea, Bacteria and Eukaryota. While Archaea are single-celled, they are unlike bacteria given their independent evolutionary history. Archaea differ from Eukaryota in their ribosomal structure and the presence—in some—of introns in the genome, as well as other features (e.g., different membrane composition).
 
Molecular biology
Archaea are of interest in biotechnology as they have unique biochemical features (e.g., enzymes of theromophiles, such as Taq polymerase, the “workhorse” enzyme of PCR) and are extremely stable at high temperatures. Archaea include metabolic oddities (e.g., extreme halophiles, which live in extremely salty environments), methanogens (which produce methane) and sulphur-dependant extreme thermophiles (which can live in extremely hot environments).

Archaea phyla
• Crenarchaeota
• Euryarchaeota
• Korarchaeota
• Nanoarchaeota
• Thaumarchaeota (recently proposed)

Archaea

( formerly
References in periodicals archive ?
According to Archea and Patterson (1985), architects and environmental designers seem to have shied away from the idea of crime prevention through environmental design, because they were not convinced that architecture could or should be a vehicle for attaining social objectives; however, many scholars and researchers agree that the built environment, although not the basic determinant, can at least function as a modifier to human behavior (Canter, 1977; Gutman, 1976; Hillier and Hanson, 1984).
Chief among factors contributing to falls is inadequate step geometry, he claims, citing research conducted by John Archea, who has studied stair design and safety and co-wrote stair-safety guidelines for the National Bureau of Standards.
Archea (1977) has developed a detailed theoretical model of physical and spatial forces affecting one's exposure to and disclosure of organizational information, other individuals, acceptable behaviors, strategically revealed identities, and evaluations of status and social influence.
1 Aug 10, 2009: ARCHEA Biogas Subsidiary Signs Two New Service Contracts with Nachhaltige Energien for Biomass Power Plant in Quenstedt, Germany 120
Contract notice: Triennial conservation and restoration contract of the archea museum collections - years 2018 - 2019 - 2020the museum is putting in place a three-year program of stabilization, cleaning and protection of its archaeological collections from 2018.
Other examples of fine sculpture include an alabaster statuette of Venus offered by Archea Ancient Art.
Mercury resistance ability has not only been reported in bacteria but also in different archea, protozoa and yeast (Schelert et al.
4] by methanogens, which are microorganisms from the Archea group that are normally found in the rumen ecosystem (Baker, 1999).
Small jolts of electricity are given to single-celled microorganisms known as archea, which prompts them to remove CO2 from the air and turn it into methane, released as tiny bubbles.
Looking at the sequences, one could argue that, while the CCA-adding enzymes in Archea are related to those in the two other kingdoms, they are also characteristically different.
Elsag Bailey's ARCHEA Document Application Management and its Slamnet ICR System offer a distributed a document processing architecture for document and data capture and reading, and for image and document management.