Ronald Oremland (Former Employee)
Science and Products
Filter Total Items: 120
Anaerobic oxidation of arsenite in Mono Lake water and by a facultative, arsenite-oxidizing chemoautotroph, strain MLHE-1 Anaerobic oxidation of arsenite in Mono Lake water and by a facultative, arsenite-oxidizing chemoautotroph, strain MLHE-1
Arsenite [As(III)]-enriched anoxic bottom water from Mono Lake, California, produced arsenate [As(V)] during incubation with either nitrate or nitrite. No such oxidation occurred in killed controls or in live samples incubated without added nitrate or nitrite. A small amount of biological As(III) oxidation was observed in samples amended with Fe(III) chelated with nitrolotriacetic acid...
Authors
Ronald S. Oremland, S.E. Hoeft, J.M. Santini, N. Bano, R.A. Hollibaugh, J.T. Hollibaugh
Bacterial respiration of arsenate and its significance in the environment Bacterial respiration of arsenate and its significance in the environment
No abstract available.
Authors
Ronald S. Oremland, Diane Newman, B.W. Kail, J.F. Stolz
Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics
Pure cultures of methylotrophs and methanotrophs are known to oxidize methyl bromide (MeBr); however, their ability to oxidize tropospheric concentrations (parts per trillion by volume [pptv]) has not been tested. Methylotrophs and methanotrophs were able to consume MeBr provided at levels that mimicked the tropospheric mixing ratio of MeBr (12 pptv) at equilibrium with surface waters (...
Authors
K.D. Goodwin, R.K. Varner, P.M. Crill, Ronald S. Oremland
Diversity of anaerobic halophilic microorganisms Diversity of anaerobic halophilic microorganisms
Life in the presence of high salt concentrations is compatible with life in the absence of oxygen. Halophilic and halotolerant anaerobic prokaryotes are found both in the archaeal and in the bacterial domain, and they display a great metabolic diversity. Many of the representatives of the Halobacteriales (Archaea), which are generally considered aerobes, have the potential of anaerobic...
Authors
Aharon Oren, Ronald S. Oremland
Methyl-mercury degradation pathways: A comparison among three mercury impacted ecosystems Methyl-mercury degradation pathways: A comparison among three mercury impacted ecosystems
We examined microbial methylmercury (MeHg) degradation in sediment of the Florida Everglades, Carson River (NV), and San Carlos Creek (CA), three freshwater environments that differ in the extent and type of mercury contamination and sediment biogeochemistry. Degradation rate constant (kdeg) values increased with total mercury (Hgt) contamination both among and within ecosystems. The...
Authors
M. Marvin-DiPasquale, J. Agee, C. Mcgowan, R.S. Oremland, M. Thomas, D. Krabbenhoft, C.C. Gilmour
Science and Products
Filter Total Items: 120
Anaerobic oxidation of arsenite in Mono Lake water and by a facultative, arsenite-oxidizing chemoautotroph, strain MLHE-1 Anaerobic oxidation of arsenite in Mono Lake water and by a facultative, arsenite-oxidizing chemoautotroph, strain MLHE-1
Arsenite [As(III)]-enriched anoxic bottom water from Mono Lake, California, produced arsenate [As(V)] during incubation with either nitrate or nitrite. No such oxidation occurred in killed controls or in live samples incubated without added nitrate or nitrite. A small amount of biological As(III) oxidation was observed in samples amended with Fe(III) chelated with nitrolotriacetic acid...
Authors
Ronald S. Oremland, S.E. Hoeft, J.M. Santini, N. Bano, R.A. Hollibaugh, J.T. Hollibaugh
Bacterial respiration of arsenate and its significance in the environment Bacterial respiration of arsenate and its significance in the environment
No abstract available.
Authors
Ronald S. Oremland, Diane Newman, B.W. Kail, J.F. Stolz
Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics Consumption of tropospheric levels of methyl bromide by C1 compound-utilizing bacteria and comparison to saturation kinetics
Pure cultures of methylotrophs and methanotrophs are known to oxidize methyl bromide (MeBr); however, their ability to oxidize tropospheric concentrations (parts per trillion by volume [pptv]) has not been tested. Methylotrophs and methanotrophs were able to consume MeBr provided at levels that mimicked the tropospheric mixing ratio of MeBr (12 pptv) at equilibrium with surface waters (...
Authors
K.D. Goodwin, R.K. Varner, P.M. Crill, Ronald S. Oremland
Diversity of anaerobic halophilic microorganisms Diversity of anaerobic halophilic microorganisms
Life in the presence of high salt concentrations is compatible with life in the absence of oxygen. Halophilic and halotolerant anaerobic prokaryotes are found both in the archaeal and in the bacterial domain, and they display a great metabolic diversity. Many of the representatives of the Halobacteriales (Archaea), which are generally considered aerobes, have the potential of anaerobic...
Authors
Aharon Oren, Ronald S. Oremland
Methyl-mercury degradation pathways: A comparison among three mercury impacted ecosystems Methyl-mercury degradation pathways: A comparison among three mercury impacted ecosystems
We examined microbial methylmercury (MeHg) degradation in sediment of the Florida Everglades, Carson River (NV), and San Carlos Creek (CA), three freshwater environments that differ in the extent and type of mercury contamination and sediment biogeochemistry. Degradation rate constant (kdeg) values increased with total mercury (Hgt) contamination both among and within ecosystems. The...
Authors
M. Marvin-DiPasquale, J. Agee, C. Mcgowan, R.S. Oremland, M. Thomas, D. Krabbenhoft, C.C. Gilmour