000188219 001__ 188219 000188219 005__ 20250129094406.0 000188219 0247_ $$2doi$$a10.1103/PhysRevE.91.022716 000188219 0247_ $$2ISSN$$a1063-651X 000188219 0247_ $$2ISSN$$a1095-3787 000188219 0247_ $$2ISSN$$a1539-3755 000188219 0247_ $$2ISSN$$a1550-2376 000188219 0247_ $$2WOS$$aWOS:000350107200006 000188219 0247_ $$2Handle$$a2128/9220 000188219 0247_ $$2altmetric$$aaltmetric:2438924 000188219 037__ $$aFZJ-2015-01661 000188219 082__ $$a530 000188219 1001_ $$0P:(DE-Juel1)157910$$aJaksch, Sebastian$$b0$$eCorresponding Author$$ufzj 000188219 245__ $$aInfluence of ibuprofen on phospholipid membranes 000188219 260__ $$aCollege Park, Md.$$bAPS$$c2015 000188219 264_1 $$2Crossref$$3online$$bAmerican Physical Society (APS)$$c2015-02-24 000188219 264_1 $$2Crossref$$3print$$bAmerican Physical Society (APS)$$c2015-02-01 000188219 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1425394219_24703 000188219 3367_ $$2DataCite$$aOutput Types/Journal article 000188219 3367_ $$00$$2EndNote$$aJournal Article 000188219 3367_ $$2BibTeX$$aARTICLE 000188219 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000188219 3367_ $$2DRIVER$$aarticle 000188219 520__ $$aA basic understanding of biological membranes is of paramount importance as these membranes comprise the very building blocks of life itself. Cells depend in their function on a range of properties of the membrane, which are important for the stability and function of the cell, information and nutrient transport, waste disposal, and finally the admission of drugs into the cell and also the deflection of bacteria and viruses. We have investigated the influence of ibuprofen on the structure and dynamics of L-α-phosphatidylcholine (SoyPC) membranes by means of grazing incidence small-angle neutron scattering, neutron reflectometry, and grazing incidence neutron spin echo spectroscopy. From the results of these experiments, we were able to determine that ibuprofen induces a two-step structuring behavior in the SoyPC films, where the structure evolves from the purely lamellar phase for pure SoyPC over a superposition of two hexagonal phases to a purely hexagonal phase at high concentrations. A relaxation, which is visible when no ibuprofen is present in the membrane, vanishes upon addition of ibuprofen. This we attribute to a stiffening of the membrane. 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