Submitted on: 04 March 2013.
Revised on: 31 May 2013.
Accepted on: 14 June 2013.
___________________Journal of Radiation Research and Applied Sciences
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Submitted on: 01 March 2006.
Revised on: 14 May 2006.
Accepted on: 08 June 2006.
___________________Journal of Radiation Research and Applied Sciences
Submitted on: 17 January 2001.
Revised on: 30 April 2001.
Accepted on: 07 June 2001.
___________________Journal of Radiation Research and Applied Sciences
http://reply.papertrans.cn/2/191/19046/19046-35.png
Submitted on: 17 April 2006.
Revised on: 01 July 2006.
Accepted on: 16 July 2006.
___________________Journal of Radiation Research and Applied Sciences