Moisture sorption isotherms - Experimental and mathematical investigations of orange (Citrus sinensis) peel and leaves
Identifieur interne : 001592 ( Main/Exploration ); précédent : 001591; suivant : 001593Moisture sorption isotherms - Experimental and mathematical investigations of orange (Citrus sinensis) peel and leaves
Auteurs : ASMA KAMMOUN BEJAR [Tunisie] ; NOURHENE BOUDHRIOUA MIHOUBI [Tunisie] ; Nabil Kechaou [Tunisie]Source :
- Food chemistry [ 0308-8146 ] ; 2012.
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Abstract
The aims of this work were to determine chemical composition and sorption isotherms of Tunisian orange peel and leaves of the "Maltaise" variety. These by-products were found to be rich in fibre, soluble sugars, protein, minerals and phenols. The equilibrium moisture contents of "Maltaise" peel and leaves were measured using the static gravimetric method at three temperatures (40, 50 and 60 °C) and in wide range of water activity (0.109-0.891). Desorption and adsorption data of peel and leaves were best fitted by the Peleg model at 40, 50 and 60 °C. The net isosteric heats of desorption and adsorption were determined from sorption isotherms. For both peel and leaves, the net isosteric heat of desorption was higher than the net isosteric heat of adsorption and both decreased continuously with increasing of the equilibrium moisture content.
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These by-products were found to be rich in fibre, soluble sugars, protein, minerals and phenols. The equilibrium moisture contents of "Maltaise" peel and leaves were measured using the static gravimetric method at three temperatures (40, 50 and 60 °C) and in wide range of water activity (0.109-0.891). Desorption and adsorption data of peel and leaves were best fitted by the Peleg model at 40, 50 and 60 °C. The net isosteric heats of desorption and adsorption were determined from sorption isotherms. For both peel and leaves, the net isosteric heat of desorption was higher than the net isosteric heat of adsorption and both decreased continuously with increasing of the equilibrium moisture content.</div></front></TEI><affiliations><list><country><li>Tunisie</li></country></list><tree><country name="Tunisie"><noRegion><name sortKey="Asma Kammoun Bejar" sort="Asma Kammoun Bejar" uniqKey="Asma Kammoun Bejar" last="Asma Kammoun Bejar">ASMA KAMMOUN BEJAR</name></noRegion><name sortKey="Kechaou, Nabil" sort="Kechaou, Nabil" uniqKey="Kechaou N" first="Nabil" last="Kechaou">Nabil Kechaou</name><name sortKey="Nourhene Boudhrioua Mihoubi" sort="Nourhene Boudhrioua Mihoubi" uniqKey="Nourhene Boudhrioua Mihoubi" last="Nourhene Boudhrioua Mihoubi">NOURHENE BOUDHRIOUA MIHOUBI</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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