OLIVEIRA RAFAEL GUSTAVO
Congresos y reuniones científicas
Título:
Mechanics of Glycolipid Membrane Stacks Studied by Neutron Scattering
Autor/es:
SCHNECK, E.; REHFELDT, F.; RAFAEL GUSTAVO OLIVEIRA; GEGE, C.; DEMÉ, B.; TANAKA, M.
Lugar:
Berlin, Germany
Reunión:
Congreso; Jornadas 2008 de la Sociedad de Fisica de Alemania; 2008
Institución organizadora:
Deutsche Physikalische Gesellschaft
Resumen:
Solid-supported glycolipid membrane multilayers, acting as well defined model systems for the study of saccharide-mediated intermembrane interactions, were studied by specular and off-specular neutron scattering. Experiments were carried out at controlled temperatures
and humidities, as well as under bulk water using a self-developed liquid cell. Force-distance relationships were recorded by measuring at various osmotic pressures. Mechanical properties of the studied membranes (i.e. bending moduli and inter-membrane compression moduli) were extracted by comparing scattering signals to reciprocal space maps simulated in the framework of smectic crystal theory. The results demonstrate that distinct variations in the oligosaccharide headgroup structures of the glycolipid molecules can result in significant changes in bending modulus and inter-membrane interactions.
and humidities, as well as under bulk water using a self-developed liquid cell. Force-distance relationships were recorded by measuring at various osmotic pressures. Mechanical properties of the studied membranes (i.e. bending moduli and inter-membrane compression moduli) were extracted by comparing scattering signals to reciprocal space maps simulated in the framework of smectic crystal theory. The results demonstrate that distinct variations in the oligosaccharide headgroup structures of the glycolipid molecules can result in significant changes in bending modulus and inter-membrane interactions.
