NIR spectra in relation to viscoelastic properties of mixtures of Na-?-Carrageenan, locust bean gum and casein

• Near-infrared spectral data were correlated with the viscoelastic property storage modulus, G?, for mixtures of five biopolymers using multivariate analysis. Gels containing Na-?-carrageenan (0.5-1.0%) mixed with locust bean gums with two different mannose to galactose ratios, ?-casein and/or ?-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 400-2500 nm, and the G? for the biopolymer gels at 15°C. Depending on sample composition, the G? varies between 0 and 3500Pa. 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. © 1998 Published by Elsevier Science Ltd. All rights reserved.

Ämnesord

LANTBRUKSVETENSKAPER  -- Lantbruksvetenskap, skogsbruk och fiske -- Livsmedelsvetenskap (hsv//swe)

AGRICULTURAL SCIENCES  -- Agriculture, Forestry and Fisheries -- Food Science (hsv//eng)

Nyckelord

Food Engineering

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