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Science 20 August 1965:
Vol. 149. no. 3686, pp. 867 - 869
DOI: 10.1126/science.149.3686.867
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Articles

Osmotic Flow in a Rigid Porous Membrane

Alexander Mauro 1

1 Rockefeller Institute, New York

The concept of an internal pressure gradient in a rigid porous membrane has been proposed as the basis for osmotic flow. The origin of the pressure in terms of the theory of the chemical potential implies also the existence of states of negative pressure, that is, tension. These states have been observed experimentally by means of a Hepp-type osmometer.

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