Efeitos da radiação gama nas qualidades nutricionais, sensoriais e na resistência a Lasioderma serricorne (F.) e Plodia interpunctella (H.) em grãos de soja Glycine max (L.) / Effects of the gamma radiation in nutritional, sensory qualities and resistance of Lasioderma serricorne (F.) e Plodia interpunctella (H.) in soybean grains Glycine max (L.).
AUTOR(ES)
Taís Carolina Franqueira de Toledo
DATA DE PUBLICAÇÃO
2010
RESUMO
With the increasement of the world population, criative strategies will be necessary to increase food prodution. To achieve this chalenge, new cultivars have been development, though different tecniques and with characteristics to improve the production. To maintain food conservation, several methods can be used. The use of Cobalto-60 radiation is a secure and useful method to increase the life time of foods. Due to the commercial and nutritional importance of soybean, some alterations must be studied. This study has the objective to determinate this alterations caused by irradiation (with doses of 2, 4 and 8 kGy) in grain of two different cultivars of soybean (BRS 213 e Embrapa 48), this study includes chemical analysis of lipid profile, isoflavones, total, free and protein-bound polyphenols, analysis sensory descriptive quantitative, biological assay for the determination of protein quality and insects assay for determination of break of resistance in the grains and desinfestation. Two cultivars presented similar lipid profile, and the irradiation promoted small reduction in the amounts of linoleic and linolenic acids. Regard to the isoflavones, the radiation treatment promoted increase in the amounts of the glycosides with dose of 2 kGy and decrease with doses of 4 and 8 kGy promoted increase in the antioxidant capacity and reduced protein-bound polyphenols. The alterations in the sensory qualities of the grains were regarding appearance and texture. It was proven the efficiency of the irradiation in the desinfestation of the grains and loss of the natural resistance. Samples irradiated with 4 and 8 kGy approached of the indices for apparent protein quality to the pattern casein. The results of this study indicating that radiation treatment of soybean offers considerable promise as an effective desinfestations process, without impairing the quality of the valuable soybean protein and with low sensory alteration
ASSUNTO(S)
sensorial evaluation isoflavones perfil lipídico pest resistance irradiação gama lipid profile gamma radiation soja isoflavonas soybean análise sensorial resistência a insetos
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