@article {671,
	title = {Metabolism of acetate, methanol, and methylated amines in intertidal sediments of lowes cove, maine.},
	journal = {Appl Environ Microbiol},
	volume = {45},
	year = {1983},
	month = {1983 Jun},
	pages = {1848-53},
	abstract = {The fates and the rates of metabolism of acetate, trimethylamine, methylamine, and methanol were examined to determine the significance of these compounds as in situ methane precursors in surface sediments of an intertidal zone in Maine. Concentrations of these potential methane precursors were generally <3 muM, with the exception of sediments containing fragments of the seaweed Ascophyllum nodosum, in which acetate was 96 muM. [2-C]acetate turnover in all samples was rapid (turnover time <2 h), with CO(2) as the primary product. [C]trimethylamine and methylamine turnover times were slower (>8 h) and were characterized by formation of both CH(4) and CO(2). Ratios of CH(4)/CO(2) from [C]trimethylamine and methylamine in uninhibited sediments indicated that a significant fraction of these substrates were catabolized via a non-methanogenic process. Data from inhibition experiments involving sodium molybdate and 2-bromoethanesulfonic acid supported this interpretation. [C]methanol was oxidized relatively slowly compared with the other substrates and was catabolized mainly to CO(2). Results from experiments with molybdate and 2-bromoethanesulfonic acid suggested that methanol was oxidized primarily through sulfate reduction. In Lowes Cove sediments, trimethylamine accounted for 35.1 to 61.1\% of total methane production.},
	issn = {0099-2240},
	author = {King, G M and Klug, M J and Lovley, D R}
}
@article {672,
	title = {Methanogenesis from methanol and methylamines and acetogenesis from hydrogen and carbon dioxide in the sediments of a eutrophic lake.},
	journal = {Appl Environ Microbiol},
	volume = {45},
	year = {1983},
	month = {1983 Apr},
	pages = {1310-5},
	abstract = {C-tracer techniques were used to examine the metabolism of methanol and methylamines and acetogenesis from hydrogen and carbon dioxide in sediments from the profundal and littoral zones of eutrophic Wintergreen Lake, Michigan. Methanogens were primarily responsible for the metabolism of methanol, monomethylamine, and trimethylamine and maintained the pool size of these substrates below 10 muM in both sediment types. Methanol and methylamines were the precursors for less than 5 and 1\%, respectively, of the total methane produced. Methanol and methylamines continued to be metabolized to methane when the sulfate concentration in the sediment was increased to 20 mM. Less than 2\% of the total acetate production was derived from carbon dioxide reduction. Hydrogen consumption by hydrogen-oxidizing acetogens was 5\% or less of the total hydrogen uptake by acetogens and methanogens. These results, in conjunction with previous studies, emphasize that acetate and hydrogen are the major methane precursors and that methanogens are the predominant hydrogen consumers in the sediments of this eutrophic lake.},
	issn = {0099-2240},
	author = {Lovley, D R and Klug, M J}
}
