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Temperature dependence of the sedimentation velocity of human erythrocytes

Beutel, U.

Acta Biologica et Medica Germanica 35(10): 1393-1397

1976

ISSN/ISBN: 0001-5318
PMID: 1020570
Document Number: 97883
The sedimentation velocity of yeast cells and human erythrocytes as a function of temperature was studied in a range from 6 degrees C to 40 degrees C. Whereas this function for yeast cells can be described by an exponential function the measurements with erythorcytes show minima at 10 degrees C and 20 degrees C, respectively, and maxima at 13 degrees C and 38 degrees C. Changes of the density or the shape of the cells cannot be the reason for these effects. Viscosity measurements on erythrocyte suspensions as a function of temperature also show deviations from the exponential function between 18 degrees C and 24 degrees C. The results explain that alterations of the membrane viscosity and phase transitions of the membrane lipids influence the sedimentation velocity of erythrocytes.

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