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After the addition of ascorbic acid or calcium ascorbate to the rSGF, the changes in rSGF pH and total acid were measured until 240 min. pH (A) and total acid (B) of rSGF; pH (C) and total acid (D) of rSGFw/P (rSGF with pepsin). Data are expressed as the mean±SEM (n=5). ***p<0.001 vs. distilled water (DW).
