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Submitted on: 09 December 2004.
Revised on: 11 January 2005.
Accepted on: 16 February 2005.
___________________Eurasian Chemico-Technological Journal
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Submitted on: 21 July 2022.
Revised on: 03 September 2022.
Accepted on: 27 October 2022.
___________________Eurasian Chemico-Technological Journal
Submitted on: 25 February 2012.
Revised on: 28 March 2012.
Accepted on: 14 May 2012.
___________________Eurasian Chemico-Technological Journal
Submitted on: 17 November 1998.
Revised on: 06 March 1999.
Accepted on: 12 April 1999.
___________________Eurasian Chemico-Technological Journal