Premium
WATER ADSORPTION PROPERTIES of COATED and NONCOATED POPCORNS
Author(s) -
MASKAN MEDENI,
GÖGÜŞ FAHRETFIN
Publication year - 1999
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/j.1745-4549.1999.tb00400.x
Subject(s) - sugar , adsorption , water activity , water content , moisture , consistency (knowledge bases) , thermodynamics , chemistry , sorption , coating , materials science , mathematics , food science , physics , geology , organic chemistry , geometry , geotechnical engineering
The addition of sugar for coating changed the sorption behavior of popcorn and made it more hygroscopic above a w value of 0.65. the isotherms for noncoated popcorn exhibited a slight sigmoid shape and for coated showed the shape characteristics of high sugar containing foods. the crossing of both popcorn samples was observed at 0.65 a w. the BET, the Smith and the GAB models were found to fit the adsorption data of noncoated popcorn; however, the BET and the Iglesias & Chirife models gave a good fit to the data of coated popcorn. the monolayer moisture content values estimated for both samples were considered to be correct values because of low standard error of estimates and their consistency with the literature values. the isosteric heat of noncoated popcorn was higher than the coated popcorn in the entire moisture content range considered for computation.