In this study, both pectin (0.84 g L-galacturonic acid/g dried
sample) and insoluble fiber were successfully separated from soy
hulls through acid and alkali hydrolysis. SHP had superior effects on
reduction in cooking loss and modification of textural properties of
meat emulsions. The meat emulsions formulated with insoluble
fibers (LSH or ALSH) showed similar physicochemical and textural
properties. In addition, the improvement effect of insoluble fibers
on cooking loss and hardness, which likely associated with the
increase in insoluble fiber content and/or improvement of dispersibility,
was greater than the direct addition of soy hulls.
Therefore, our results suggest that soy hulls can be further utilized
as a value-added source for pectin and insoluble fiber. Moreover,
both pectin and insoluble fiber from soy hulls through acid and
alkali hydrolysis could be used as novel functional non-meat ingredients.
Further studies determining antioxidant property of the
soy hull fibers and their impacts on sensory attributes of emulsified
meat products would be warranted.