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Submitted on: 12 December 2001.
Revised on: 12 February 2002.
Accepted on: 12 March 2002.
___________________Digest Journal of Nanomaterials and Biostructures
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Submitted on: 29 December 2002.
Revised on: 25 February 2003.
Accepted on: 31 March 2003.
___________________Digest Journal of Nanomaterials and Biostructures
Submitted on: 25 February 2000.
Revised on: 15 April 2000.
Accepted on: 25 May 2000.
___________________Digest Journal of Nanomaterials and Biostructures
Submitted on: 28 September 2002.
Revised on: 19 October 2002.
Accepted on: 22 November 2002.
___________________Digest Journal of Nanomaterials and Biostructures