%0 Journal Article
%T ISOTERMAS DE DESORCION DE HUMEDAD EN PITAHAYA AMARILLA (Selenicereus megalanthus)
%A AYALA-APONTE
%A ALFREDO A.
%A SERNA COCK
%A LILIANA
%A RODRIGUEZ
%A GLORIA
%J Biotecnolog¨ªa en el Sector Agropecuario y Agroindustrial
%D 2012
%I Universidad del Cauca
%X moisture desorption isotherms for yellow pitahaya fruits were studied at 15, 25, and 35¡ãc using the gravimetric method for a 0.111-0.901 water activity range. experimental values were adjusted by using the gab, henderson, smith, oswin y chung y fost models. the isosteric heat of adsorption (qst) was determined using the clausius-clapeyron equation. the results showed that yellow pitahaya fruits exhibit type iii adsorption isotherms and that the equilibrium moisture content (emc) is temperature-dependent. for the same water activity value, the emc decreased when temperature increased. the gab model presented the best fit to the experimental values. the qst dropped from 61.43 a 45.11 kj/mol when the emc increased from 0.08 to 0.56 g water/g dry matter, respectively.
%K cactaceae
%K mathematical models
%K isosteric heat of sorption.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S1692-35612012000200016&lng=en&nrm=iso&tlng=en