Document Detail

Irradiation of Langmuir-Blodgett multilayer preparations of phospholipids and a fatty acid. 1: Effect of UV radiation.
MedLine Citation:
PMID:  1362756     Owner:  NLM     Status:  MEDLINE    
Langmuir-Blodgett (LB) preparations containing stacked monolayers of phospholipids or stearic acid were irradiated with UV light and the electric conductance perpendicular to the planes of the monolayers was measured. There was no observable change of conductance when LB preparations of stearic acid were irradiated. For LB preparations of phospholipids, a rise of conductance, dependent on dose rate, was observed, reaching an equilibrium level after a few hours. After irradiation the conductance fell with a temperature-dependent time constant, and eventually reached a final level a little above the initial value. A three-state model is proposed for the LB phospholipid preparations. This suggests that the absorption of one photon raises a molecule from the ground to an excited state; and the absorption of a second photon carries it into a damaged but repairable or metastable state.
W Fatani; D Rosen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of radiation biology     Volume:  62     ISSN:  0955-3002     ISO Abbreviation:  Int. J. Radiat. Biol.     Publication Date:  1992 Dec 
Date Detail:
Created Date:  1993-03-04     Completed Date:  1993-03-04     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8809243     Medline TA:  Int J Radiat Biol     Country:  ENGLAND    
Other Details:
Languages:  eng     Pagination:  645-51     Citation Subset:  IM; S    
Department of Crystallography, Birkbeck College, London, UK.
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MeSH Terms
Cell Membrane / physiology,  radiation effects*
Electric Conductivity / radiation effects
Models, Biological*
Phospholipids / radiation effects
Stearic Acids / radiation effects
Ultraviolet Rays*
Reg. No./Substance:
0/Phospholipids; 0/Stearic Acids; 57-11-4/stearic acid

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