Temperature directly affects the rate of irradiation-induced mass loss from phosphatidylcholine multilayers

We monitored the mass thickness of egg yolk phosphatidylcholine multilayers at several temperatures during electron irradiation. The rate of irradiation-induced mass loss was reduced substantially when this specimen was cooled to liquid nitrogen temperature from room temperature. Additional cooling...

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Bibliographic Details
Published in:Ultramicroscopy 1991-06, Vol.35 (3), p.351-356
Main Authors: Lamvik, M.K., Magid, A.D., Davilla, S.D., Córdova, L.
Format: Article
Language:English
Subjects:
Animals
Egg Yolk
Electrons
Microscopy, Electron - standards
Phosphatidylcholines - chemistry
Phosphatidylcholines - radiation effects
Temperature
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Summary:We monitored the mass thickness of egg yolk phosphatidylcholine multilayers at several temperatures during electron irradiation. The rate of irradiation-induced mass loss was reduced substantially when this specimen was cooled to liquid nitrogen temperature from room temperature. Additional cooling to liquid helium temperature caused an additional reduction of mass-loss rate. The characteristic doses D(1/e), which are the slopes of the logarithm of the differential mass thickness against dose, were approximately 7 × 10 3 e/nm 2 at 290 K, 8 × 10 4 e/nm 2 at 130 K, and 1.4 × 10 5 e/nm 2 at
ISSN:0304-3991
1879-2723
DOI:10.1016/0304-3991(91)90087-M