The Synthesis of Europium-Doped Calcium Carbonate by an Eco-Method as Free Radical Generator Under Low-Intensity Ultrasonic Irradiation for Body Sculpture oleh Che-Yung Kuan, Che-Yung Kuan, Yu-Ying Lin, Yu-Ying Lin, I-Hsuan Yang, I-Hsuan Yang, Ching-Yun Chen, Chih-Ying Chi, Chih-Ying Chi, Chih-Ying Chi, Chi-Han Li, Chi-Han Li, Zhi-Yu Chen, Zhi-Yu Chen, Li-Ze Lin, Chun-Chen Yang, Feng-Huei Lin, Feng-Huei Lin