title: [Effect of home-processing in the preparation of pinto beans (Phaseolus vulgaris L.) on the tannin content and nutritive value of proteins].
abstract: A 3(2) factor design was carried out in order to investigate the different home-cooking treatments applied in the preparation of pinto beans (Phaseolus vulgaris L.) on the nutritive value of their protein. The factors studied were previous soaking, type of cooking and addition of cooking broth. Biological evaluation of the protein was performed, and the protein efficiency ratio (PER) and apparent digestibility of the protein (DAP) values were obtained. The tannin content was measured in hulls, cotyledons and in the cooking broths of each experimental treatment. The most significant effect of the PER value was the type of cooking (P less than 0.0001), followed by the addition of cooking broth (P less than 0.05) as well as a significant interaction between cooking method and addition of broth (P less than 0.025). Soaking did not have significant effects per se or through its interactions in relation to PER. The highest values for PER and DAP were obtained with the boiling treatment without broth. The detrimental effect of the cooking broth can be explained by its tannin content (108.5-272.25 mg Eq. catechin/100g).
authors: Centro de Investigación en Alimentación y Desarrollo, A.C. (CIAD, A.C.), Hermosillo, Sonora, México.
authors: F
authors: F
authors: Goycoolea
authors: E
authors: E
authors: González de Mejía
authors: J M
authors: JM
authors: Barrón
authors: M E
authors: ME
authors: Valencia
mesh_terms: D000704:Analysis of Variance; D007887:Fabaceae / Q000737:chemistry*; D005511:Food Handling / Q000379:methods*; D006358:Hot Temperature; D009753:Nutritive Value; D014674:Plant Proteins, Dietary / Q000032:analysis*; D010946:Plants, Medicinal; D013634:Tannins / Q000032:analysis*
chemical_list: D014674:Plant Proteins, Dietary; D013634:Tannins
vernacular_title: Efecto de los tratamientos caseros en la preparación de frijol pinto (Phaseolus vulgaris L.) sobre el contenido de taninos y valor nutritivo de las protéinas.