Submitted on: 12 May 2011.
Revised on: 28 June 2011.
Accepted on: 12 August 2011.
___________________Aerosol Science and Engineering
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Submitted on: 17 November 1999.
Revised on: 26 January 2000.
Accepted on: 17 March 2000.
___________________Aerosol Science and Engineering
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