Submitted on: 13 September 2001.
Revised on: 27 November 2001.
Accepted on: 29 December 2001.
___________________JOURNAL OF CHEMICAL RESEARCH---SAGE PUBLICATIONS LTD
Submitted on: 10 August 2006.
Revised on: 24 November 2006.
Accepted on: 08 December 2006.
___________________JOURNAL OF CHEMICAL RESEARCH---SAGE PUBLICATIONS LTD
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Submitted on: 19 March 1999.
Revised on: 12 June 1999.
Accepted on: 23 June 1999.
___________________JOURNAL OF CHEMICAL RESEARCH---SAGE PUBLICATIONS LTD
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