Conclusion
The influence of yeast content and frozen storage time of sweet
dough was studied. The frozen storage time had a significant effect
on the dough’s hardness, DS springiness and viscoelasticity.
DY frozen sweet dough (higher yeast content) gave dough with
a higher specific volume due to higher yeast activity, whereas the
specific volume decreased during frozen storage.
This present study revealed that the yeast content of SY dough
(0 day) is equivalent to that DY frozen dough stored for 27 days.
The rheological parameters were not influenced by yeast level.
However, hardness and DS increased and springiness and tand decreased
since four weeks of frozen storage. These modifications of
the rheological properties could be explained by ice crystals
growth induces a water redistribution causing mechanical damage
to the gluten network of frozen sweet doughs. Indeed, after four
weeks of storage a decrease in the amount of a-helix correlated