Inquiring Disappearance of Purplish Red Pigment in Steamed Twisted Rolls with Red Pitaya Juice
YU Xin1, WANG Qiu2, WANG Xi3
1. YuMing Senior High School, Dalian 116023, China;
2. School of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian 116029, China;
3. Benxi No.1 Senior High School, Benxi 117000, China
