955 resultados para New York Electrical Contractors Association.
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Saucer-shaped iron-manganese crusts occur adjacent to gravel shoal areas in Oneida lake in central New York. The crusts usually have a crude concentric banding owing to an alternation of orange, iron-rich layers and black, iron-poor layers. Materials from both types of layers are x-ray amorphous. The Oneida lake crusts, like most other freshwater manganese nodules, contain about the same Mn concentration as marine manganese nodules, but are usually higher in Fe and lower in trace metals than their marine equivalents. Although Fe and Mn may be precipitating directly from the lake water, it is more likely that the oxidate crusts are the result of precipitation of Fe and Mn when reduced sediment pore water comes in contact with well oxygenated bottom waters. Organisms, particularly bacteria, may play a role in the formation of the crusts, but to date no evidence of this has been found.
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"Final report, grant MC-R-360011."
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Mode of access: Internet.
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References: p. 35.
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"Reprinted from Journal of the New England Water Works Association, vol. XXV, no. 3."
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Contract no. DE-AM-03-76SF0015.
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Supplement has separate t.-p. and pagination.
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C.R. Richards, chairman.
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No volumes were issued in 1884-86? 1889, 1891, 1893-94, 1897, 1908; 1927/28 issued in 1 vol.
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Paper read at the eleventh annual convention of the National association of comptrollers and accounting officers, held at Syracuse, N.Y., June 1, 1916.