Effect of freezing and frozen storage of doughs on bread quality

The effects of freezing and storage in frozen conditions on bread quality, crumb properties, and aggregative behavior of glutenins were analyzed. The effect of different additives on bread quality was also studied. The result s obtained showed that freezing and storage at -18 degreesC decreased the b read quality. Samples stored in frozen conditions supplemented with diacety l-tartaric acid ester of monoglycerides, gluten, and guar gum produced brea ds of greater volume and more open crumb structure than those prepared with the base formulation (without additives). All additives analyzed increased the proof time. Crumb firmness increased with dough frozen storage and bre ad aging time at 4 degreesC. A decrease in the amount of glutenin subunits of high molecular mass was observed by electrophoresis analysis of the SDS- soluble proteins aggregates extracted from the frozen dough. This result su ggested that the protein matrix of bread underwent depolymerization during storage in frozen conditions.