The influence of frozen and canned storage on the chemical freshness parameters, determined in golden kingclip (Genypterus blacodes)

Changes in pH, total volatile basic nitrogen (TVB-N) and K-value were determined in golden kingclip species (Genypterus blacodes) frozen and stored at -18 °C and -30 °C for 6 months and golden kingclip canned fish in two different filling media. In frozen fish, pH values ranged from 6.4 to 6.8 and TVB-N varied from 8 to 14 mg of N/100 g. In canned fish, pH values varied from 6.5 to 7.0 and TVB-N from 9 to 22 mg of N/100 g. In frozen fish, the K-value was the most demanding index for determining freshness, namely, below 20%, while in canned fish it varied from 8% to 55%

Effect of quinoa and potato flours on the thermomechanical and breadmaking properties ofwheat flour

The thermomechanical properties of dough and the physical characteristics of bread from quinoa-wheat and potato-wheat composite flours at 10 and 20% substitution level were evaluated. The functional properties of flours were measured by the water absorption index (WAI), water solubility index (WSI) and swelling power (SP). The thermomechanical properties of wheat and composite flours were assessed using a Mixolab and the baking quality characteristics of breads were weight, height, width, and specific volume. The results showed that the higher values of WAI (4.48), WSI (7.45%), and SP (4.84) were for potato flour. The quinoa-wheat composite flour presented lower setback and cooking stability data, which are a good indicator of shelf life of bread. On the other hand, the potato-wheat composite flour showed lower stability, minimum torque and peak torque, and higher water absorption. Weight, height, width, and specific volume of wheat bread were most similar to samples of potato-wheat composite flour at 10% substitution level