Ranendra K. Majumdar

Gel properties of sutchi catfish (Pangasius hypophthalmus) surimi as affected by selected washing process and number of washing cycles

The gel properties of sutchi catfish surimi prepared by conventional washing and alkaline–saline washing method were studied for four washing cycles. Decrease (p < 0.05) in myoglobin content was found in alkaline washing process compared to conventional washing at each washing cycle. The highest hardness, breaking force and deformation was observed in gels prepared from alkaline–saline washing method. Whiteness in conventional washed surimi gels increased non-significantly (p < 0.05) compared to alkaline–saline-washed surimi gels. Protein bands on Sodium dodecyl sulfate polyacrylamide gel electrophoresis indicated that the protein extractability was more in alkaline–saline washing and disappearance of bands in conventional washing method was observed between 116 and 45 kDa indicating less yield of protein.

Textural and sensory characteristics of retort-processed freshwater prawn (Macrobrachium rosenbergii) in curry medium

ABSTRACT Freshwater prawn in curry was thermally processed to three F0 values of 6, 8, and 9 at 116°C. Total process times for F0 values of 6, 8, and 9 were 53, 57, and 63 min, respectively. The cook value (CV) obtained at F0 values of 6, 8, and 9 was 87.53, 107.93, and 117.55 min, respectively. Instrumental texture profile analysis revealed that except springiness, the values of hardness, gumminess, and chewiness decreased as the F0 values increased. CIELAB values of L*, b*, and a* increased as the F0 values were increased. The organoleptic evaluation scored the highest for the product processed to F0 7 min.

Influence of Previous Washing Process and Storage Time on Chemical Composition and Sensory Quality of Thai Pangas (Pangasius sutchi) Minced Muscle During Frozen Storage

ABSTRACT This work focuses on the effect of a washing process followed by frozen storage (3 months; −18°C) on the quality of minced pangas muscle. A previous washing step has led to a positive effect on fish quality according to marked decreases in expressible moisture (28%), volatile amines (25.7%), free fatty acids (24.5%), and thiobarbituric acid reactive substances (29%). However, such indexes showed quality loss throughout the frozen storage. Amongst quality indexes, special attention should be given to the expressible moisture value and the water holding capacity, as being closely related to the gel-forming ability in order to obtain surimi-type commercial products.