Il Nuovo Cimento D

, Volume 2, Issue 4, pp 1203–1212 | Cite as

Spin exchange in nitroxide-charged membrane models: an ESR method for detecting photodynamic effects

  • C. Emiliani
  • S. Cannistraro
Article
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Summary

An electron spin resonance (ESR) method for detecting the photodynamic effects induced in membrane models is described. The method is based on the study of the spin exchange line broadening occurring in nitroxide-charged liposomes before and after visible irradiation in the prsence of various photosensitizing molecules.

PACS. 87.20

Membrane biophysics 

Riassunto

Si descrive un metodo per la rivelazione degli effetti fotodinamici indotti in modelli di membrane, utilizzante la spettroscopia di risonanza elettronica di spin (ESR). Il metodo è basato sullo studio dell'allargamento di riga dovuto all'interazione di scambio di spin che si ha in liposomi caricati con molecole di nitrosside, prima e dopo l'irraggiamento con luce visibile in presenza di vari fotosensibilizzanti.

Резюме

Описывается метод электронного спинового резонанса для обнау-жения фотодинамическх эффекктов, индуцированных в мембранных моделях. Метод основан на изучении уширения линии, обусловленного спиовым обменом, в липо-сомах с молекулами закиси азота перед и после облучения в видимой части спектра в присутствии различных фоточувствительных молекул.

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Copyright information

© Società Italiana di Fisica 1983

Authors and Affiliations

  • C. Emiliani
    • 1
  • S. Cannistraro
    • 1
  1. 1.Gruppo di Biofisica MolecolareDipartimento di Fisica dell'UniversitàPerugia

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