Corresponding author. Tel.: +66 874843723.
E-mail addresses: rattanaphol.m@rmutp.ac.th, pholm123@hotmail.com
(R. Mongkholrattanasit).
0926-6690/$ – see front matter © 2013 Elsevier B.V. All rights reserved. http://dx.doi.org/10.1016/j.indcrop.2013.04.041