Isochronal temperature profiles of 20% cowpea flour slurries showed conduction heating while the estimated Rayleigh numbers predicted natural convection heating; apparently, the flour particles suppressed convection. Magnitudes of f h of cowpea gels increased linearly with fat content, decreased with moisture content, and were independent of the cowpea flour particle size. The heating curve of a 10% cowpea flour slurry at 121°C showed one break due to gelation of protein and starch at about 66°C and another due to loss of rigidity at about 87°C.
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Okechukwu et al. (1991) studied this question.
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