1. Department of Chemical Engineering, National Tsing Hua University, Hsin-Chu, Taiwan 30013, R.O.C.; Department of Anatomy, Chang Gung University, Kwei-San, Taoyuan, 333, Taiwan, R.O.C.; Department of Engineering and System Science, National Tsing Hua University, Hsin-Chu, Taiwan 30013, R.O.C.; and National Synchrotron Radiation Research Center, Hsin-Chu, Taiwan 300, R.O.C.