Submitted on: 10 May 1998.
Revised on: 07 August 1998.
Accepted on: 28 September 1998.
___________________JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
Submitted on: 11 December 2016.
Revised on: 15 March 2017.
Accepted on: 01 May 2017.
___________________JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
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Submitted on: 01 September 2011.
Revised on: 09 October 2011.
Accepted on: 26 October 2011.
___________________JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY