There were no significant differences in the
overall appearance. The LP2 and BP2 treatments yielded the lowest
(pb0.05) color scores due to lower (pb0.05) L⁎ and a⁎ values as
compared to the other treatments. However, the addition of BP had
positive effects on flavor and warmed-over flavor during storage due
to the strong aroma of BP. A previous study found that hamburgers
with added grape fiber had improved flavor and tenderness (Sáyago-
Ayerdi, Brenes, & Goñi, 2009). Significant differences (pb0.05) were
observed from day 4 to day 7. There were no differences in overall
acceptability among the treatments, and increasing storage time
resulted in reduced overall acceptability. There were no significant
differences in overall acceptability among the treatments on addition
of LP and BP.