SUMMARY
Nutritional evaluation and accelerated storage at 37ºC of fried bean and corn mixtures
Nutritive value of corn and beans is limited by the deficiency in some aminoacids; so, the combination of both of them might be very advantageous from a nutritional point of view. A research with the following purposes was done: to improve the biological value of corn and bean through the formulation of mixes of fried kernels; and, to know the shelf life of the mixes during an accelerated storage period. Fried kernels mixes, in a ratio of 50:50%, from three varieties of bean (Pinto 114, Suave 85 and Tortola Inia) and dent yellow corn were made; protein value of the mixes was evaluated. Mixes were store at 37ºC during 15 days, determining every five days, their peroxides and moisture content and their water activity. All the mixes got values of NPR-Rel higher than 80%; the best one was Suave 85/corn with a value of 88.2% which indicates an improving of the protein quality. The stored products showed along the whole period, low values for peroxides (3.25- 6.12 meq/Kg oil) which might allow a shelf life of 90 days at room temperature; also, moisture content and water activity were low assuring microbial stability.

Key words: Net protein ratio, bean/corn mixes, accelerated storage, peroxides.



Recibido: 20/09/2001
Aceptado: 30/08/2002

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