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Submitted on: 22 October 1998.
Revised on: 16 January 1999.
Accepted on: 10 March 1999.
___________________Journal of the Iranian Chemical Society
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Submitted on: 01 August 2021.
Revised on: 12 October 2021.
Accepted on: 03 December 2021.
___________________Journal of the Iranian Chemical Society
Submitted on: 19 June 2009.
Revised on: 09 September 2009.
Accepted on: 14 October 2009.
___________________Journal of the Iranian Chemical Society