Hydration dependence of molecular mobility in phospholipid bilayers

Pissis, P; Enders, A; Nimtz, G

dc.contributor.author	Pissis, P	en
dc.contributor.author	Enders, A	en
dc.contributor.author	Nimtz, G	en
dc.date.accessioned	2014-03-01T01:09:25Z
dc.date.available	2014-03-01T01:09:25Z
dc.date.issued	1993	en
dc.identifier.issn	0301-0104	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/10971
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-21144459624&partnerID=40&md5=8e8a855b5222fd8fc81060605d807c6b	en
dc.subject.classification	Chemistry, Physical	en
dc.subject.classification	Physics, Atomic, Molecular & Chemical	en
dc.subject.other	FROZEN AQUEOUS-SOLUTIONS	en
dc.subject.other	DIELECTRIC-RELAXATION	en
dc.subject.other	DEPOLARIZATION THERMOCURRENTS	en
dc.subject.other	DYNAMIC PROPERTIES	en
dc.subject.other	WATER MULTILAYERS	en
dc.subject.other	MEMBRANES	en
dc.subject.other	TIME	en
dc.subject.other	TEMPERATURES	en
dc.subject.other	SYSTEMS	en
dc.subject.other	GLUCOSE	en
dc.title	Hydration dependence of molecular mobility in phospholipid bilayers	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1993	en
heal.abstract	Dielectric measurements on di-myristoil-phosphatidylcholine (DMPC)-water bilayers at different water contents up to 0.50 w/w (dry basis) corresponding to approximately 18 mol of water per mol of DMPC by means of the thermally stimulated depolarization currents (TSDC) method in the temperature range 77-320 K show three broad peaks. For fully hydrated samples the peaks are at about 140, 210 and 230 K. Using special peak resolving thermal sampling and partial heating techniques the complex thermograms were analyzed and the spectra of activation energies were determined. In the order of increasing temperature the peaks were attributed to the relaxation of loosely bound water molecules, the rotation of the head groups and, tentatively, space charge polarization. The measurements show that water in excess of 0.08 corresponding to 3 mol of water per mol of DMPC forms clusters, in agreement with the results of water adsorption isotherms measurements. © 1993.	en
heal.publisher	ELSEVIER SCIENCE BV	en
heal.journalName	Chemical Physics	en
dc.identifier.isi	ISI:A1993KV22300025	en
dc.identifier.volume	171	en
dc.identifier.issue	1-2	en
dc.identifier.spage	285	en
dc.identifier.epage	292	en