1992
DOI: 10.1051/lait:1992636
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Aptitude à la gélification thermique de la β-lactoglobuline : influence du pH, de l'environnement ionique et de la présence des autres protéines du lactosérum

Abstract: -La gélification thermique de la~-Iactoglobuline (P-Lg) a été étudiée par des mesures rhéologiques en régime dynamique en fonction du pH (3,0 à 9,0-10,0), de la concentration en sels minéraux (NaCI, CaCI 2) et de la présence d'a-lactalbumine (a-La), de caséinomacropêptide (CMP) ou de sérum albumine bovine (SAS). La température (Tm) à partir de laquelle le module élastique (G') devient mesurable, diminue de 87,S à 77,S oC de pH 3,0 à 5,0; de pH 5,0 à 9,0, la Tm diminue de 77,S à 60 oC dans le cas de la solution… Show more

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Cited by 16 publications
(5 citation statements)
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“…obtained in the presence of NaCl were higher than in the presence of CaCl 2 . This is consistent with results reported by other authors [9]. In a given mineral environment, significant differences were observed between different mixtures, without any clear correlation between final and protein nature.…”
Section: Effect Of Mineral and Protein Composition On Gel Propertiessupporting
confidence: 93%
“…obtained in the presence of NaCl were higher than in the presence of CaCl 2 . This is consistent with results reported by other authors [9]. In a given mineral environment, significant differences were observed between different mixtures, without any clear correlation between final and protein nature.…”
Section: Effect Of Mineral and Protein Composition On Gel Propertiessupporting
confidence: 93%
“…Even if more than 98% of the~-LG remains soluble, its presence is problematic at a high protein concentration, as gelation properties of WPC at pH values lower than 4.5 and at temperatures above 50 "C are essentially due to this protein (Gault and Fauquant, 1992). The texture of the sediment and the efficiency of the separation of soluble and precipitated phases differ according to the total solid concentration.…”
Section: Influence Ofprotein Concentration' On the Sediment Texturementioning
confidence: 99%
“…The formation of a gel is the result of an equilibrium between intermolecular attractive forces, and intermolecular repulsive forces between charges of the same sign. This equilibrium depends mainly on protein concentration and environment characteristics, such as pH, ionic strength, and the presence of other food components (Gault & Fauquant, 1992;Tolstoguzov, 1993).…”
Section: Introductionmentioning
confidence: 99%