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Submitted on: 22 December 2007.
Revised on: 19 March 2008.
Accepted on: 02 May 2008.
___________________BIOPOLYMERS---WILEY
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Submitted on: 09 June 2016.
Revised on: 13 July 2016.
Accepted on: 25 July 2016.
___________________BIOPOLYMERS---WILEY