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@ARTICLE{Peters:838939,
author = {Peters, J. and Marion, J. and Becher, F. J. and Trapp, M.
and Gutberlet, T. and Bicout, D. J. and Heimburg, T.},
title = {{T}hermodynamics of lipid multi-lamellar vesicles in
presence of sterols at high hydrostatic pressure},
journal = {Scientific reports},
volume = {7},
number = {1},
issn = {2045-2322},
address = {London},
publisher = {Nature Publishing Group},
reportid = {FZJ-2017-07442},
pages = {15339},
year = {2017},
abstract = {We compared the effect of cholesterol at different
concentration on the phase behaviour of
DMPC(1,2-dimyristoyl-sn-glycero-3-phosphocholine)
multilamellar vesicles. We used pressure
perturbationdifferential scanning calorimetry (PPC) that
studies a system on the whole by giving access to
relevantthermodynamic quantities, and elastic incoherent
neutron scattering (EINS) that probes local motionsof a
system at the atomic level by allowing extraction of
dynamical parameters. PPC revealed thatthe volume expansion
coefficient of DMPC and DMPC/Cholesterol samples with 13 and
25 $mol\%cholesterol$ is a linear function of the heat
capacity measured by differential scanning
calorimetry.Neutron backscattering spectroscopy showed that
the mean square displacements of H atoms doexhibit an
increase with temperature and a decrease under increasing
pressure. Cholesterol added atconcentrations of 25 and 50
$mol\%$ led to suppression of the main phase transition.
Taking advantage ofthese results, the present study aims (i)
to show that calorimetry and EINS using the Bicout and
Zaccaimodel equally permit to get access to thermodynamic
quantities characterizing pure DMPC and DMPC/cholesterol
mixtures, thus directly confirming the theoretical method,
and (ii) to validate our approachas function of temperature
and of pressure, as both are equally important and
complementarythermodynamic variables.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / Neutronenstreuung ; JCNS-1 /
JCNS-2},
ddc = {000},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-1-20110106 / I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)NOSPEC-20140101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:29127413},
UT = {WOS:000414917800079},
doi = {10.1038/s41598-017-15582-4},
url = {https://juser.fz-juelich.de/record/838939},
}