Electronic Resource
Springer
Cellular and molecular life sciences
2 (1946), S. 132-137
ISSN:
1420-9071
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The permeability of cells to dissolved molecules is given by the permeation constant ofCollander (cm·h−1), whilst the permeability to water is measured by a filter constant (cm·Atm.−1·h−1). Therefore these constants are not comparable, and it is impossible to calculate quantitative data on the semipermeability of a cell. In this paper the permeation process is considered as a counterdiffusion of dissolved molecules into the cell and water out of the cell. From the two resulting diffusion equations formulae and a graphic method are derived, which permit to calculate the permeation constant of water, when the permeation constant of a given substance entering the cell is known. These constants are comparable and their ratio is a conclusive measure of the semipermeability.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02163917
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