Porphyra yezoensis was purchased from Nantong Lanbo Industry
Co. Ltd. (Jiangsu, China). Polysaccharide from P. yezoensis (PSPY)
was prepared as described in our previous study (Zhou & Ma, 2006).
The effect of microwave intensity (60 and 240 mA), with or without
H2O2 solution, on the degradation of PSPY (0.5%, w/w) at 85 ◦C was
examined.
2.4. Measurement of browning