Drying kinetics for some fruits: Predicting of porosity and color during dehydration.

Tsami, E; Katsioti, M

dc.contributor.author	Tsami, E	en
dc.contributor.author	Katsioti, M	en
dc.date.accessioned	2014-03-01T01:49:51Z
dc.date.available	2014-03-01T01:49:51Z
dc.date.issued	2000	en
dc.identifier.issn	0737-3937	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25941
dc.subject	drying model	en
dc.subject	porosity	en
dc.subject	color	en
dc.subject	sorption	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	SORPTION ISOTHERMS	en
dc.subject.other	VEGETABLES	en
dc.subject.other	SHRINKAGE	en
dc.title	Drying kinetics for some fruits: Predicting of porosity and color during dehydration.	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	Drying kinetics of four fruits (prune, quince, fig and strawberry) were studied by using a simple mass transfer mathematical model involving a characteristic parameter (K) as a function of process variables. The model was tested with data produced in a laboratory air dryer, using non-linear regression analysis. The investigation involved three values of sample thickness (5, 10, 15mm) and three different air temperatures (50, 60, 70 degrees C). The parameters of the model were found to be greatly affected by sample thickness and air temperature. The effect of moisture content on the porosity of three fruits (namely avocado, prune and strawberry) was also investigated. A simple mathematical model was used to correlate porosity with moisture content. It was found that porosity increased with decreasing moisture content. Samples of three fruits (avocado, prune and strawberry) were investigated to estimate color changes during conventional drying at 70 degrees C. A first order kinetic model was fitted to experimental data with great success. It is found that the color of avocado and strawberry change while the color of prune remains the same.	en
heal.publisher	MARCEL DEKKER INC	en
heal.journalName	DRYING TECHNOLOGY	en
dc.identifier.isi	ISI:000088287500012	en
dc.identifier.volume	18	en
dc.identifier.issue	7	en
dc.identifier.spage	1559	en
dc.identifier.epage	1581	en