Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 17 July 1970:
Vol. 169. no. 3942, pp. 296 - 298
DOI: 10.1126/science.169.3942.296
Prev | Table of Contents | Next

Articles

Charge-Mosaic Membranes: Dialytic Separation of Electrolytes from Nonelectrolytes and Amino Acids

John N. Weinstein 1 and S. Roy Caplan 1

1 Biophysical Laboratory, Harvard Medical School, Boston, Massachussetts 02115

Charge-mosaic membranes were used for dialytic separations of potassium chloride from low-molecular-weight nonelectrolytes and neutral amino acids. The permeability ratio (potassium chloride to uncharged species) ranged from about 6 in the case of methanol to about 86 in that of mannitol. A theoretical model predicts that optimum rates of dialysis should be achieved by dialyzing against salt concentrations other than zero; this prediction was confirmed by experiment. These observations suggest potential applications of mosaics in laboratory separations, industrial processing, and hemodialysis.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
A New Charge-Mosaic Membrane from a Multiblock Copolymer.
T. FUJIMOTO, K. OHKOSHI, Y. MIYAKI, and M. NAGASAWA (1984)
Science 224, 74-76
   Abstract »    PDF »


To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)