This thesis has done very well because they have received from Dr. Thamthiwat kindly Professor Dr. Nararatwanchai. 1. the Chairman, Dr. jaras Gunners pour voltage. Chairman of the second examination, Dr. chemist female Ah ya can Rika Yu LAN. Major Advisor Assistant Professor saiwichai The Advisor together, concepts and instructions, guidelines and support to conduct research of this thesis performed until done. User research, grateful for your kindness is highly.
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