where u0 is the whole content of acetyl of native KGM, u is the content of acetyl when they were partially removed by controlling reaction conductions. Thus, the content of acetyl of native KGM was counted as u0 ¼ 1.82%, and different DDs of KGM samples were obtained and coded as Da0 (native KGM), Da1 (DD/% ¼ 34.13 0.21), Da2 (DD/% ¼ 65.84 0.34), and Da3 (DD/% ¼ 98.29 0.17). All the data are averages of experiments performed at least in duplicate