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Sulfate reduction and methanogenesis in marine sediments
Methanogenesis and sulfate-reduction were followed in laboratory incubations of sediments taken from tropical seagrass beds. Methanogenesis and sulfate-reduction occurred simultaneously in sediments… Expand
Demethylation of dimethylsulfoniopropionate and production of thiols in anoxic marine sediments.
Dimethylsulfoniopropionate (DMSP) is a natural product of algae and aquatic plants, particularly those from saline environments. We investigated whether DMSP could serve as a precursor of thiols in… Expand
Relationship between productivity and N2 (C2H2) fixation in a Thalassia testudinum community1
N2 (C2H2) fixation and primary production were measured in communities of Thalassia testudinum at two sites in Bimini Harbor (Bahamas). Production was determined by uptake of [14C]NaHCO3, by leaf… Expand
A new mechanism for the aerobic catabolism of dimethyl sulfide.
Aerobic degradation of dimethyl sulfide (DMS), previously described for thiobacilli and hyphomicrobia, involves catabolism to sulfide via methanethiol (CH3SH). Methyl groups are sequentially… Expand
Depletion of adenosine triphosphate inDesulfovibrio by oxyanions of group VI elements
Oxyanions of elements from group VI of the periodic table, i.e., analogs of SO42−, destroyed adenosine 5′-triphosphate (ATP) in cells of sulfate-respiring bacteria (Desulfovibrio spp.), probably via… Expand
New routes for aerobic biodegradation of dimethylsulfoniopropionate.
Dimethylsulfoniopropionate (DMSP), an osmolyte in marine plants, is biodegraded by cleavage of dimethyl sulfide (DMS) or by demethylation to 3-methiolpropionate (MMPA) and 3-mercaptopropionate (MPA).… Expand
Metabolism of methylated osmolytes by aerobic bacteria from Mono Lake, a moderately hypersaline, alkaline environment
Three strains of aerobic bacteria were isolated from water and sediment samples of Mono Lake, a moderately hypersaline (90 ppt), alkaline (pH 9.7) lake in California. The organisms, Gram-negative… Expand
Anaerobic degradation of the benzene nucleus by a facultatively anaerobic microorganism.
A bacterium was isolated by elective culture with p-hydroxybenzoate as substrate and nitrate as electron acceptor. It grew either aerobically or anaerobically, by nitrate respiration, on a range of… Expand
New facultative Thiobacillus and a reevaluation of the heterotrophic potential of Thiobacillus novellus.
A new facultatively autotrophic Thiobacillus has been isolated in pure culture. The general physiological characteristics of the organism are described together with a redescription of Thiobacillus… Expand
Inhibition of methanogenesis in marine sediments by acetylene and ethylene: validity of the acetylene reduction assay for anaerobic microcosms.
Methanogenesis was irreversibly inhibited in sediments by concentrations of acetylene employed in nitrogen fixation assays (1 to 20%, vol/vol). Ethylene, but not ethane, also stopped methane… Expand