- Address correspondence and reprint requests to Laura Leticia Valdez Velázquez, PhD, Faculty of Chemical Sciences, University of Colima, Km 9 Carretera Colima-Coquimatlán, Coquimatlán, Colima, México 28400. E-mail: .
- Received March 27, 2013
- Accepted June 6, 2013
- First published September 1, 2013.
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