This researchwas supported by the Commission on Higher Education
(Research Group Development Grant to Prasert Sobhon). The
Thailand Research Fund (Royal Golden Jubilee Ph.D. Program to
Yotsawan Tinikul). A.J. Mercier was supported by the Natural Sciences
and EngineeringResearchCouncil of Canada.Wewould like to
express our special thanks toMs. Ruchanok Cheotacha, Ms. Jaruwan
Poljaroen, and Mr. Ittipon Phoungpetchara for useful suggestions.