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@ARTICLE{Tang:256547,
author = {Tang, Jennifer and Alsop, Richard and Schmalzl, Karin and
Epand, Richard and Rheinstädter, Maikel},
title = {{S}trong {S}tatic {M}agnetic {F}ields {I}ncrease the {G}el
{S}ignal in {P}artially {H}ydrated {DPPC}/{DMPC}
{M}embranes},
journal = {Membranes},
volume = {5},
number = {4},
issn = {2077-0375},
address = {Basel},
publisher = {MDPI},
reportid = {FZJ-2015-06431},
pages = {532 - 552},
year = {2015},
abstract = {NIt was recently reported that static magnetic fields
increase lipid order in the hydrophobic membrane core of
dehydrated native plant plasma membranes [Poinapen, Soft
Matter 9:6804-6813, 2013]. As plasma membranes are
multicomponent, highly complex structures, in order to
elucidate the origin of this effect, we prepared model
membranes consisting of a lipid species with low and high
melting temperature. By controlling the temperature,
bilayers coexisting of small gel and fluid domains were
prepared as a basic model for the plasma membrane core. We
studied molecular order in mixed lipid membranes made of
dimyristoyl-sn-glycero-3-phosphocholine (DMPC) and
dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) using neutron
diffraction in the presence of strong static magnetic fields
up to 3.5 T. The contribution of the hydrophobic membrane
core was highlighted through deuterium labeling the lipid
acyl chains. There was no observable effect on lipid
organization in fluid or gel domains at high hydration of
the membranes. However, lipid order was found to be enhanced
at a reduced relative humidity of $43\%:$ a magnetic field
of 3.5 T led to an increase of the gel signal in the
diffraction patterns of $5\%.$ While all biological
materials have weak diamagnetic properties, the
corresponding energy is too small to compete against thermal
disorder or viscous effects in the case of lipid molecules.
We tentatively propose that the interaction between the
fatty acid chains’ electric moment and the external
magnetic field is driving the lipid tails in the hydrophobic
membrane core into a better ordered state.},
cin = {JCNS-2 / PGI-4 / JARA-FIT / JCNS-ILL},
ddc = {570},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
$I:(DE-82)080009_20140620$ / I:(DE-Juel1)JCNS-ILL-20110128},
pnm = {144 - Controlling Collective States (POF3-144) / 524 -
Controlling Collective States (POF3-524) / 6212 - Quantum
Condensed Matter: Magnetism, Superconductivity (POF3-621) /
6213 - Materials and Processes for Energy and Transport
Technologies (POF3-621) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (POF3-623)},
pid = {G:(DE-HGF)POF3-144 / G:(DE-HGF)POF3-524 /
G:(DE-HGF)POF3-6212 / G:(DE-HGF)POF3-6213 /
G:(DE-HGF)POF3-6G4},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000367793700003},
pubmed = {pmid:26426063},
doi = {10.3390/membranes5040532},
url = {https://juser.fz-juelich.de/record/256547},
}