A dielectric study of the state of water in plant stems

Pissis, P; Angnostopoulou-konsta, A; Apekis, L

dc.contributor.author	Pissis, P	en
dc.contributor.author	Angnostopoulou-konsta, A	en
dc.contributor.author	Apekis, L	en
dc.date.accessioned	2014-03-01T01:06:43Z
dc.date.available	2014-03-01T01:06:43Z
dc.date.issued	1987	en
dc.identifier.issn	0022-0957	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/9588
dc.subject	Dielectric properties	en
dc.subject	Free and bound water	en
dc.subject	Water content.	en
dc.subject.classification	Plant Sciences	en
dc.title	A dielectric study of the state of water in plant stems	en
heal.type	journalArticle	en
heal.identifier.primary	10.1093/jxb/38.9.1528	en
heal.identifier.secondary	http://dx.doi.org/10.1093/jxb/38.9.1528	en
heal.language	English	en
heal.publicationDate	1987	en
heal.abstract	Pissis, P., Anagnostopoulou-Konsta, A. and Apekis, L. 1987. A dielectric study of the state of water in plant stems.-J. exp. Bot. 38: 1528-1540.We report on thermally stimulated depolarization current (TSDC) measurements on plant stems of six different species in the temperature range of 77-300 K and over a wide range of water contents, in an attempt to determine the binding modes of water molecules. The measurements revealed the existence of three dielectric dispersions. The first dispersion at low temperatures is attributed to the reorientation of loosely bound water molecules. The origin of the second dispersion at intermediate temperatures is not yet clear. It is either due to the reorientation of tightly bound water molecules or to the relaxation of some botanical materials rather than water. Finally, the third dispersion, at high temperatures, is attributed to water-assisted space charge polarization connected with dc ionic conductivity. The amount of tightly bound water is estimated to be about 0·2-g-g{squared minus}1 of dry material or about 30% of the total water content, the rest being mainly loosely bound water. Little or none of the water behaves dielectrically like pure water. © 1987 Oxford University Press.	en
heal.publisher	OXFORD UNIV PRESS UNITED KINGDOM	en
heal.journalName	Journal of Experimental Botany	en
dc.identifier.doi	10.1093/jxb/38.9.1528	en
dc.identifier.isi	ISI:A1987K170600013	en
dc.identifier.volume	38	en
dc.identifier.issue	9	en
dc.identifier.spage	1528	en
dc.identifier.epage	1540	en