THE PREPARATION OF A GRADED SERIES OF ULTRAFILTERS AND MEASUREMENT OF THEIR PORE SIZES.
A simple procedure for making a series of membranes of graded pore sizes is presented with data for permeability of the membrane series to water and to colloidal sols of known particle sizes. A convenient ultrafiltration apparatus for operation under aseptic conditions is described.
Krueger
A P
AP
Department of Bacteriology and Experimental Pathology, Stanford University, California.
Ritter
R C
RC