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pro vyhledávání: '"Roar L. Irgens"'
Autor:
Roar L. Irgens
Publikováno v:
Bergey's Manual of Systematics of Archaea and Bacteria. :1-3
Publikováno v:
Archives of Microbiology. 155:137-142
A gram-negative, rod-shaped, gas-vacuolate, aerobic, heterotrophic bacterium was isolated from Spirit Lake, Washington. It was further characterized by phase-contrast and electron microscopy and phenotypic tests. The isolate does not utilize carbohyd
Autor:
Roar L. Irgens, Laurie J. Chadwick
Publikováno v:
Applied and Environmental Microbiology. 57:594-596
A hydrogen gas (H 2 )-producing strain of Ectothiorhodospira vacuolata isolated from Soap Lake, Washington, possessed nitrogenase activity. Increasing evolution of H 2 with decreasing ammonium chloride concentrations provided evidence that nitrogenas
Autor:
Roar L. Irgens
Publikováno v:
International Journal of Systematic Bacteriology. 27:38-43
Two gram-negative, gas-vacuolated, aerotolerant, heterotrophic bacteria were isolated from the anaerobic digester of the Gottingen Waste Treatment Plant, Gottingen, Federal Republic of Germany. Pure white colonies of these organisms were picked from
Publikováno v:
Current Microbiology. 18:261-265
Several strains of heterotrophic, gas vacuolate bacteria were isolated from marine waters of Antarctica. To our knowledge these are the first marine forms of gas vacuolate bacteria to be reported. Current isolates are all Gram-negative rods. All isol
Publikováno v:
FEMS Microbiology Letters. 53:101-111
Chitinolytic bacteria were enumerated and isolated from marine waters and sediments along the highly productive Antarctic Peninsula. Chitinolytic bacteria were found in low concentrations (approximately 1 cell per ml) in the water column and at much
Publikováno v:
Applied and Environmental Microbiology. 55:1033-1036
Gas-vacuolate heterotrophic bacteria from marine habitats are reported here for the first time. They have been isolated from Antarctic sea ice microbial communities and the underlying water column. The predominant gas-vacuolate bacterium from the sea
Autor:
Roar L. Irgens
Publikováno v:
Current Microbiology. 8:183-186
Thioacetamide (TAA), CH3CSNH2, is an unstable sulfur compound which upon addition of acid decomposes into acetic acid, ammonia, and hydrogen sulfide (H2S). This characteristic may be taken advantage of when doing plate counts or isolation streaks of
Autor:
Roar L. Irgens, H. Orin Halvorson
Publikováno v:
Applied Microbiology. 13:373-386
In the conventional treatment of sewage, the solids are normally disposed of by anaerobic digestion. This leaves a considerable amount of plant nutrients, such as nitrogen and phosphate, as soluble compounds which will eventually find their way into
Publikováno v:
FEMS Microbiology Letters. 3:139-141