Water sorption of Amaranthus Cruentus l. seeds modelled by G.A.B. equation?

A.M. PAGANO; R.H. MASCHERONI

INTERNATIONAL JOURNAL OF FOOD PROPERTIES

TAYLOR & FRANCIS INC

Lugar: Londres; Año: 2003 vol. 6 p. 369 - 390

1094-2912

The GAB (Guggenheim, Andersen, and de Boer) equation was adjusted to literature data of sorption of Amaranthus cruentus L. (Me vs. aw for adsorption and desorption) determined at 25, 30, 35, 40, 45, 50, 55, 65, 70, and 90
C, in the range of water activity from 0.029 to 0.979. To quantify the goodness of fit, the correlation coefficient (R2), the sum of squares (RSS), the standard error of the estimate (Sy), the mean relative deviation (MRD) and the plots of residuals were analysed. The three theoretical parameters of the GAB model (Mo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range ofAmaranthus cruentus L. (Me vs. aw for adsorption and desorption) determined at 25, 30, 35, 40, 45, 50, 55, 65, 70, and 90
C, in the range of water activity from 0.029 to 0.979. To quantify the goodness of fit, the correlation coefficient (R2), the sum of squares (RSS), the standard error of the estimate (Sy), the mean relative deviation (MRD) and the plots of residuals were analysed. The three theoretical parameters of the GAB model (Mo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range of
C, in the range of water activity from 0.029 to 0.979. To quantify the goodness of fit, the correlation coefficient (R2), the sum of squares (RSS), the standard error of the estimate (Sy), the mean relative deviation (MRD) and the plots of residuals were analysed. The three theoretical parameters of the GAB model (Mo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range ofR2), the sum of squares (RSS), the standard error of the estimate (Sy), the mean relative deviation (MRD) and the plots of residuals were analysed. The three theoretical parameters of the GAB model (Mo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range ofSy), the mean relative deviation (MRD) and the plots of residuals were analysed. The three theoretical parameters of the GAB model (Mo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range ofMo, C, and K) gave a good correlation (R2>0.9817, RSS<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range of<0.0297, MRD<0.138, Sy<0.0143, and random residuals-plots) in the range of aw from 0.029 to 0.979, of interest in seed storage and processing. However this correlation does not consider the effect of temperature (T) on coefficient values. In a second stage, parameters Mo and K were adjusted at each temperature. Very low variances were obtained in the range 25?65
C for desorption and in the range 25?55
C for adsorption. These results suggested that Mo and K remain almost constant and a correlation with T is not justified.w from 0.029 to 0.979, of interest in seed storage and processing. However this correlation does not consider the effect of temperature (T) on coefficient values. In a second stage, parameters Mo and K were adjusted at each temperature. Very low variances were obtained in the range 25?65
C for desorption and in the range 25?55
C for adsorption. These results suggested that Mo and K remain almost constant and a correlation with T is not justified.T) on coefficient values. In a second stage, parameters Mo and K were adjusted at each temperature. Very low variances were obtained in the range 25?65
C for desorption and in the range 25?55
C for adsorption. These results suggested that Mo and K remain almost constant and a correlation with T is not justified.Mo and K were adjusted at each temperature. Very low variances were obtained in the range 25?65
C for desorption and in the range 25?55
C for adsorption. These results suggested that Mo and K remain almost constant and a correlation with T is not justified.
C for desorption and in the range 25?55
C for adsorption. These results suggested that Mo and K remain almost constant and a correlation with T is not justified.Mo and K remain almost constant and a correlation with T is not justified.T is not justified.