|
|
vol. 9, nr. 3 (2007)
|
Parameter selection of equations of water vapour adsorption kinetics by cocoa instant powder and its igredients
|
|
|
Ewa Ostrowska-Ligęza
, Andrzej Lenart
|
|
| (get PDF )
|
|
|
Department of Food Engineering and Process Management, Warsaw Agricultural University (SGGW)
ul. Nowoursynowska 159C, 02-776 Warszawa
|
|
|
vol. 9 (2007), nr. 3,
pp. 719-731
|
|
|
abstract:
The purpose of the research was analysis of material composition and water activity influence on the kinetics of water vapour adsorption. The materials were powders: crystal and powder sugars, pure cocoa, milk powder and maltodextrin. Kinetics of water adsorption were determined at three levels of water activity of the environment (0.34; 0.65; 0.90). Two exponential equations were determined: simplified and compound. Both equations well fitted the adsorption curves at three levels of water activity.
|
|
keywords:
powdered cocoa drink, water vapour adsorption, water activity, kinetics of water adsorption
|
|
original in:
Polish
|
|
|
|
|
|
