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Titre :
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NIR spectra in relation to viscoelastic properties of mixtures of Na-kappa-Carrageenan, locust bean gum and casein
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Auteurs :
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L. Lundin ;
B. Stenlof ;
A. Hermansson
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Type de document :
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article/chapitre/communication
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Année de publication :
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1998
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Format :
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p. 189-193
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Langues :
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= Anglais
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Catégories :
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CHIMIE
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Mots-clés :
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CASEINE
;
MELANGE
;
VISCOELASTICITE
;
SPECTROSCOPIE
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Résumé :
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Near-infrared spectral data were correlated with the viscoelastic property storage modulus, G', for mixtures of five biopolymers using multivariate analysis. Gels containing Na-kappa-carrageenan (0.5-1.0%) mixed with locust bean gums with two different mannose to galactose ratios, alpha-casein and/or kappa-casein (0-0.5%, polymer concentration) in 0.25 M NaCl were studied. Forty-two experiments based on a multivariate, central composite circumscribed design (CCC) were performed. Partial least square (PLS) regression was used to find a model relation between NIR transmittance spectra, recorded at 15 °C in the wavelength interval 40-2500 nm, and the G' for the biopolymer gels at 15 °C. Depending on sample composition, the G' varies between 0 and 3500 Pa. Cross-validation using a designed data set led to a model based on 11 principal components with a correlation coefficient of 0.85 and a root mean square error of prediction of 540 Pa.
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Source :
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Food Hydrocolloids, vol Vol.12
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