http://reply.papertrans.cn/2/192/19191/19191-21.png
Submitted on: 10 August 2005.
Revised on: 07 October 2005.
Accepted on: 02 November 2005.
___________________Journal of Saudi Chemical Society
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Submitted on: 19 January 1999.
Revised on: 13 May 1999.
Accepted on: 23 June 1999.
___________________Journal of Saudi Chemical Society
http://reply.papertrans.cn/2/192/19191/19191-25.png
Submitted on: 04 July 2007.
Revised on: 04 October 2007.
Accepted on: 22 October 2007.
___________________Journal of Saudi Chemical Society
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http://reply.papertrans.cn/2/192/19191/19191-29.png
Submitted on: 19 July 2006.
Revised on: 25 October 2006.
Accepted on: 07 November 2006.
___________________Journal of Saudi Chemical Society