2009

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Browsing 2009 by Author "Ninan, G."

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    Effect of hydrocolloids on the functional properties of batter mix used for the preparation of coated shrimps
    (Society of Fisheries Technologists (India), Cochin, 2009) Abbas, A.R.; Ninan, G.; Joseph, A.C.; Ravishankar, C.N.
    n the present study, the effect of the addition of three different hydrocolloids viz. Guar Gum (GG), Carboxy Methyl Cellulose (CMC) and Carboxy Methyl Chitosan (CMT) on the functional properties of batter mix used for the preparation of coated shrimps was investigated. The maximum viscosity was noticed in batter containing GG at 1:2 dilution followed by batters containing CMC and CMT. Among the three batter systems, GG based batter showed highest shear thinning behavior and indicated maximum viscosity at lower dilutions and lower shear rates. Compared to the other two batters, GG based batter indicated maximum water retention capacity irrespective of temperatures and dilutions. In coated shrimps, the highest pick up was observed with GG-based batter, followed by CMC and CMT based batters. Thus, in terms of functional properties and batter consistency, GG based batter mix was found to be superior to the other two batter mixes.
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    Optimization of gelatin extraction from the skin of freshwater carps by response surface methodology
    (Society of Fisheries Technologists (Indian), 2009) Ninan, G.; Joseph, J.; Zynudheen, A.A.; Mathew, P.T.; Geethalakshmi, V.
    Response Surface Methodology (RSM) was used to determine the optimum operating conditions for extracting the gelatin from the skin of three species of freshwater carps viz., Rohu(Labeo rohita), Common Carp (Cyprinus carpio) and Grass Carp (Ctenopharyngodon idella). From the screening experiments, four independent variables viz., alkali pretreatment concentration, acid pretreatment concentration, pretreatment time and extraction temperature were identified as the critical variables that had significant effect on the extraction of gelatin from the skin of these species. The responses studied were gel strength and yield. The optimum gelatin extraction conditions from the skin of three species based on the responses were 51.35 minutes (pre-treatment time) and 49.33C (extraction temperature) for Rohu skin; 60 minutes (pre-treatment time) and 57.97C (extraction temperature) for Common Carp skin; 60 minutes (pre-treatment time) and 40C (extraction temperature) for Grass Carp skin. The gelatin from the skin of the freshwater carps showed high yield, medium gel strength and high viscosity.