A dielectric study of the state of water in plant stems

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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.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

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