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Preparative free-flow electrophoresis as a method of fractionation of natural organic materials
J.A. Leenheer, Ronald L. Malcolm
1973, Water Supply Paper 1817-D
Preparative free-flow electrophoresis was found to be an efficient method of conducting large-scale fractionations of the natural organic polyelectrolytes occurring in many surface waters and soils. The method of free-flow electrophoresis obviates, the problem of adsorption upon a supporting medium and permits the use of high potential gradients and currents...
Map showing mined areas of the Boulder-Weld coal field, Colorado
Roger B. Colton, R.L. Lowrie
1973, Miscellaneous Field Studies Map 513
Compiled by Raymond E. Lowrie, U.S. Bureau of Mines (1966), and revised by Roger B. Colton, U.S. Geological Survey, assisted by Harold R. Fitch, 1972.In the revision of this map, many mine maps and two unpublished general small-scale maps of the area by F. H. Canis (deceased) and Samuel Tescher...