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Submitted on: 23 November 2007.
Revised on: 20 March 2008.
Accepted on: 08 May 2008.
___________________International Journal of Smart and Nano Materials
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Submitted on: 18 April 1998.
Revised on: 12 May 1998.
Accepted on: 23 June 1998.
___________________International Journal of Smart and Nano Materials
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