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Submitted on: 11 January 2004.
Revised on: 01 February 2004.
Accepted on: 20 March 2004.
___________________Journal of Chemistry---HINDAWI LTD
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Submitted on: 06 August 2000.
Revised on: 18 September 2000.
Accepted on: 07 November 2000.
___________________Journal of Chemistry---HINDAWI LTD
Submitted on: 03 July 2020.
Revised on: 13 October 2020.
Accepted on: 07 November 2020.
___________________Journal of Chemistry---HINDAWI LTD
Submitted on: 05 January 2018.
Revised on: 04 April 2018.
Accepted on: 22 April 2018.
___________________Journal of Chemistry---HINDAWI LTD
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