Production of soluble enzymatic protein hydrolysate from industrially defatted nondehulled sunflower meal
1991
Parrado, J. | Bautista, J. | Machado, A.
Industrially defatted nondehulled sunflower meal (SFM) with a protein content of 27.7% and polyphenol and soluble carbohydrate contents of 6.1% and 4.0%, respectively, can be separated by a flotation/sedimentation process into three fractions: proteinaceous (PF), soluble (SF), and lignocellulosic (LCF). The PF is washed at pH 4.5 with water in a three-step extraction process. This enhances production of a protein concentrate (PC) containing 58.3% protein and significantly reduced polyphenol and soluble carbohydrate contents of 1.5% and 0.6%, respectively. Hydrolysis of this concentrate by the neutral protease Kerase to 18.8% degree of hydrolysis transforms the concentrate into a protein hydrolysate containing 77.6% protein and low polyphenol and soluble carbohydrate contents 1.1% and 2.2%, respectively. Due to its composition and solubility at practically all pH values, this product has high potential (1) for dietetic purposes as a food ingredient or whipping agent in the food industry and (2) as a nitrogen source for media formulation in the fermentation industry.
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