| comprehensive control (or elimination) of hepatitis b virus transmission in the united states. | in the united states, the reported rate of hepatitis b has declined by over 50% since 1987, probably as a result of vaccination programmes, behavioural changes, refinements in blood screening procedures, and the availability of virus inactivated blood components. the majority of new hepatitis b infections occur in 20-39 year olds, and perinatal transmission is uncommon except in certain at risk groups. initial efforts to control hepatitis b in the us were targeted at high risk groups, including ... | 1996 | 8786049 |
| [yeast biodiversity in hydromorphic soils with reference to grass-sphagnum swamp in western siberia and the hammocky tundra region( barrow, alaska)]. | the microbiological analysis of 78 samples taken from a boreal bog in western siberia and from a tundra wetland soil in alaska showed the presence of 23 yeast species belonging to the genera bullera, candida, cryptococcus, debaryomyces, hanseniaspora, metschnikowia, mrakia, pichia, rhodotorula, saccharomyces, sporobolomyces, torulaspora, and trichosporon. peat samples from the boreal bog were dominated by eurytopic anamorphic basidiomycetous species, such as rhodotorula mucilaginosa and sporobol ... | 2001 | 11763794 |
| methanogenium marinum sp. nov., a h2-using methanogen from skan bay, alaska, and kinetics of h2 utilization. | a methanogen, strain ak-1, was isolated from permanently cold marine sediments, 38- to 45-cm below the sediment surface at skan bay, alaska. the cells were highly irregular, nonmotile coccoids (diameter, 1 to 1.2 microm), occurring singly. cells grew by reducing co2 with h2 or formate as electron donor. growth on formate was much slower than that on h2. acetate, methanol, ethanol, 1- or 2-propanol, 1- or 2-butanol and trimethylamine were not catabolized. the cells required acetate, thiamine, rib ... | 2002 | 12448725 |
| isolation and characterization of methylotrophic methanogens from anoxic marine sediments in skan bay, alaska: description of methanococcoides alaskense sp. nov., and emended description of methanosarcina baltica. | three novel strains of methylotrophic methanogens were isolated from skan bay, alaska, by using anaerobic cultivation techniques. the water was 65 m deep at the sampling site. strains ak-4 (=ocm 774), ak-5t (=ocm 775t=dsm 17273t) and ak-9 (=ocm 793) were isolated from the sulfate-reducing zone of the sediments. each of the strains was a non-motile coccus and occurred singly. cells grew with trimethylamine as a catabolic substrate and strain ak-4 could also catabolize methanol. yeast extract and ... | 2005 | 16280522 |