Emulsifying Properties of Food Proteins: Bovine Mi cellar Casein
Tóm tắt
The capacity of micellar casein isolated from bovine milk to stabilize oil in water (0:w) emulsions was studied. Emulsion surface area per unit mass of protein, i.e., emulsifying activity (EA), was highest at a protein concentration of 1% and o:w ratio of 1:9. The surface concentration of micellar casein was related to the o:w ratio being highest at an o:w of 4:6. Interfacial surface area decreased at pH 6.7 reflecting micellar stability and improved with increasing pH apparently because of destabilization of the casein micelle. Emulsion stability was high when the EA was high. The apparent viscosity of the emulsions was inversely related to EA.
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Tài liệu tham khảo
Bielow CC., 1967, Average hydrophobicity of proteins and the relationship between it and protein structure, J. Theor. Biol, 16
Cantor C.R., 1960, “Biophysical Chemistry II”
Darling D.F., 1982, Recent advances in the destabilization of dairy emulsions, J. Dairy Res, 49
Dickinson E., 1982, “Colloids in Foods”, 377
Graham D.E., 1979, Proteins at liquid interfaces, 1. Kinetics of adsorption and surface denaturation J. Cold Interface Sci, 70
Halling P.J., 1981, Protein‐stabilized foam and emulsions, CRC Crit. Rev. Food Sci. Nutr, 15
Haque Z., 1988, Emulsifying properties of food proteins: Development of a standardized method, J. Food Sci
Haque Z.andKinsella J.E.1988b.Emulsifying properties of o proteins: Bovine serum albumin.J. Food Sci. (In press).
Haque Z., 1984, Lipophilization of α3—Casein. 3. Purification and physiochemical properties of novel amphipathic fatty‐acyl peptides, J Agric. Food Chem, 32
Kinsella J.E., 1984, Milk proteins: Physicochemical and functional properties, Crit Rev. Food Sci. & Nutr, 21
Kinsella J.E., 1987, “Proteins at Inter faces”
Jenness R., 1962, Preparation and properties of a salt solution which simulates milk ultrafiltrate, Neth. Milk & Dairy J, 16
McMahon D.J., 1984, Effect of calcium, phosphate and bulk culture media on milk coagulation proerties, J. Dairy Sci, 67
Morr C.V., 1982, “Development in Dairy; Chemistry‐l”, 375
Morr C.V., 1981, “Protein Functionality in Foods”
Ogden L.V., 1973, Homogenization induced clustering of fat globules in cream and model systems, Dissertation Abstracts International B, 34
Pearce K.N., 1978, Emulsifying properties of proteins: Evaluation of a turbidimetric technique, J. 1.gnc. Food Chem, 26
Schmidt D.G., 1982, “Development in Dairy Chemistry — 1”, 61
Tornberg E., 1978, Functional characterization of protein stabilized emulsions: Standard emulsifying procedure, J. Food Sci, 5
Tornberg E., 1978, Functional characterization of protein stabilized emulsions: Creaming stability, J. Food Sci, 43
Vliet T., 1978, Interactions between adsorzed macromolecules: Measurements on emulsions and liquid films, J. Colloid Interface Sci, 65
Vincent B., 1974, Effect of adsorbed polymers on dispersion stability, Adv. Colloid Interface Sci, 4
Walstra P., 1984, “Dairy Chemistry and Physics”, 229
Wang C‐S., 1975, Lowry determination of protein in the presence of Triton X‐100, Anal. Biochem, 63