RESUMO
The efficiency of the dehulling process of sorghum grain was studied in a laboratory abrasive stone mill. Residual tannins as tannic acid and cathequin equivalent, as well as color measurements of the product were determined as control parameters of the procedure. Besides, fiber, ash and fat contents as well as other variables were evaluated. Assays were performed at three stone speeds and at different operation times. According to the results obtained, a stone speed of 1,700 rpm and a 12-minute period, are the best operating conditions, while measurements of color of the product constitute the best method for controlling the dehulling process.
Assuntos
Grão Comestível , Tecnologia de Alimentos , Taninos/análise , Grão Comestível/análise , Taninos Hidrolisáveis/análise , Fatores de TempoRESUMO
The effects of thermal treatment, dry heat and steam on the physiologically active substances: urease and trypsin inhibitors of soybean products, were evaluated by means of urease activity and trypsin inhibitor activity. The parameters time and temperature, moisture and particle size were considered. From these analyses it can be concluded that the best conditions to obtain optimum soybean products were 25% of initial moisture content, exposed to steam (97 degrees C) during four to eight minutes.