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Submitted on: 23 September 2007.
Revised on: 28 November 2007.
Accepted on: 22 December 2007.
___________________ANNALES DE CHIMIE-SCIENCE DES MATERIAUX
Submitted on: 05 January 2000.
Revised on: 04 April 2000.
Accepted on: 09 May 2000.
___________________ANNALES DE CHIMIE-SCIENCE DES MATERIAUX
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