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Hydroxide decomposition of dimethylsulfoniopropionate to form dimethylsulfideThe kinetics of DMS production resulting from reaction of OH(-) with DMSP were investigated as a function of hydroxide concentration and temperature. The reaction was first-order with respect to DMSP and OH(-). The second order rate constant at 20+/-1 C is 0.0044/M/sec. The activation energy for this reaction is 14.4 kcal/mode. The investigation indicates that the rate of reaction of DMSP with OH(-) is very slow at the pH of seawater, suggesting that DMSP, which may be a major precursor of DMS in seawater, decomposes in the ocean by other mechanisms. A bacterium which produces DMS from DMSP quantitatively at rates many orders of magnitude higher than indicated by OH(-1) decomposition has been cultured, suggesting that enzymatic processes accelerate the production of DMS from DMSP in seawater.
Document ID
19880035944
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Dacey, John W. H.
(Woods Hole Oceanographic Inst. MA, United States)
Blough, Neil V.
(Woods Hole Oceanographic Institution MA, United States)
Date Acquired
August 13, 2013
Publication Date
December 1, 1987
Publication Information
Publication: Geophysical Research Letters
Volume: 14
ISSN: 0094-8276
Subject Category
Oceanography
Accession Number
88A23171
Funding Number(s)
CONTRACT_GRANT: NAGW-606
CONTRACT_GRANT: NSF OCE-84-16203
Distribution Limits
Public
Copyright
Other

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