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Submitted on: 06 February 2000.
Revised on: 20 April 2000.
Accepted on: 18 June 2000.
___________________Biofuels Bioproducts & Biorefining-Biofpr
Submitted on: 14 January 2011.
Revised on: 23 April 2011.
Accepted on: 16 June 2011.
___________________Biofuels Bioproducts & Biorefining-Biofpr
Submitted on: 15 December 2010.
Revised on: 12 January 2011.
Accepted on: 08 February 2011.
___________________Biofuels Bioproducts & Biorefining-Biofpr