1. MTEC, National Science and Technology Development Agency (NSTDA), 114 Thailand Science Park (TSP), Phahonyothin Rd., PathumThani; 12120 Thailand
2. Rubber Technology Research Centre (RTEC), Faculty of Science; Mahidol University, Salaya Campus, Phutthamonthon 4 Rd., Salaya; Nakhon Pathom 73170 Thailand