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High hydrostatic pressure effects investigated by neutron scattering on lipid multilamellar vesicles

The effects of high hydrostatic pressure on the structure and dynamics of model membrane systems were investigated using neutron scattering. Diffraction experiments show shifts of the pre- and main-phase transitions of multilamellar vesicles of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) to h...

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Hauptverfasser: Trapp, Marcus (VerfasserIn) , Marion, Jérémie (VerfasserIn) , Tehei, Moeava (VerfasserIn) , Demé, Bruno (VerfasserIn) , Gutberlet, Thomas (VerfasserIn) , Peters, Judith (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 28 Oct 2013
In: Physical chemistry, chemical physics
Year: 2013, Jahrgang: 15, Heft: 48, Pages: 20951-20956
ISSN:1463-9084
DOI:10.1039/C3CP52762J
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1039/C3CP52762J
Verlag, lizenzpflichtig, Volltext: https://pubs.rsc.org/en/content/articlelanding/2013/cp/c3cp52762j
Volltext
Verfasserangaben:Marcus Trapp, Jérémie Marion, Moeava Tehei, Bruno Demé, Thomas Gutberlet and Judith Peters
Beschreibung
Zusammenfassung:The effects of high hydrostatic pressure on the structure and dynamics of model membrane systems were investigated using neutron scattering. Diffraction experiments show shifts of the pre- and main-phase transitions of multilamellar vesicles of 1,2-dimyristoyl-sn-glycero-3-phosphocholine (DMPC) to higher temperatures with increased pressure which are close to results observed previously by other techniques, namely (10.4 ± 1.0) K kbar−1 and (20.0 ± 0.5) K kbar−1 for the two transitions. Backscattering spectroscopy reveals that the mean square displacements in the liquid phase are about 10% smaller at 300 bar and about 20% smaller at 600 bar compared to atmospheric pressure, whereas in the gel phase below the main phase transition the mean square displacements show a smaller difference in the dynamics of the three pressure values within the studied pressure range.
Beschreibung:Gesehen am 10.02.2022
Beschreibung:Online Resource
ISSN:1463-9084
DOI:10.1039/C3CP52762J

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