Dielectric investigation of the hydration mechanism in potato starch

Vartzeli-Nikaki, P; Kripotou, S; Konsta, AA

dc.contributor.author	Vartzeli-Nikaki, P	en
dc.contributor.author	Kripotou, S	en
dc.contributor.author	Konsta, AA	en
dc.date.accessioned	2014-03-01T02:42:05Z
dc.date.available	2014-03-01T02:42:05Z
dc.date.issued	2002	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/30778
dc.subject	Experimental Data	en
dc.subject	Potato	en
dc.subject	Sorption Isotherm	en
dc.subject	Water Content	en
dc.subject.other	Adsorption isotherms	en
dc.subject.other	Dielectric properties	en
dc.subject.other	Hydration	en
dc.subject.other	Numerical methods	en
dc.subject.other	Plants (botany)	en
dc.subject.other	Relaxation processes	en
dc.subject.other	Spectroscopic analysis	en
dc.subject.other	Water	en
dc.subject.other	Equilibrium water sorption isotherm	en
dc.subject.other	Physicochemical technique	en
dc.subject.other	Potato starch	en
dc.subject.other	Thermally Stimulated Depolarization Current	en
dc.subject.other	Water sorption measurement	en
dc.subject.other	Starch	en
dc.title	Dielectric investigation of the hydration mechanism in potato starch	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1109/ISE.2002.1043012	en
heal.identifier.secondary	http://dx.doi.org/10.1109/ISE.2002.1043012	en
heal.publicationDate	2002	en
heal.abstract	The hydration mechanism of various polysaccharides of plant origin has been investigated by means of several physicochemical and dielectric techniques. In this work, we present, more particularly, results obtained with potato starch samples, using (a) equilibrium water sorption isotherms and (b) Thermally Stimulated Depolarization Currents (TSDC) techniques in the temperature range 77 - 300 K. The water content of our samples, defined as the ratio of weight of sorbed water to the weight of dry sample, varied between 2.4% and 41%. The results of equilibrium water sorption measurements were analyzed by fitting experimental data to the Guggenheim-Anderson-De Boer (GAB) equation. Two main relaxation regions are observed in TSDC spectra; the dependence of their characteristics on the water content is investigated and their origin is interpreted on the basis of results obtained in the first part of this work.	en
heal.journalName	Proceedings - International Symposium on Electrets	en
dc.identifier.doi	10.1109/ISE.2002.1043012	en
dc.identifier.spage	338	en
dc.identifier.epage	341	en