Surfactants are one of the most important product categories in chemical industry. Consumer care is a prominent area in the wide variety of commercial applications. In this study, the localization of dyes within surfactant micelles is studied utilizing small-angle neutron scattering (SANS) combined with contrast variation using deuterated surfactant molecules. Additional NMR measurements...
Diffusion of proteins is essential for transport and regulation in biology. Changes in the short time diffusion - where hydrodynamic and electrostatic interactions dominate whilst protein-protein collisions can be neglected - influence the long time diffusion. For monodisperse protein solutions, systematic studies in the short-time regime confirm a comprehensive picture in good agreement with...
Saponins are ususally plant derived amphiphiles which exhibit strong physiological effects. In the present contribution we discuss the saponin ß-aescin with respect to its interaction with model membranes made of the negatively charged lipid 1,2-dioleoyl-sn-glycero-3-phosphoglycerol (DOPG). The study is conducted at a pH value at which aescin is negatively charged as well, and mixtures up to...
Small-angle scattering is a commonly used tool to analyze the dispersion of nanoparticles in all kinds of matrices. Besides some obvious cases, the associated structure factor is often complex and cannot be reduced to a simple interparticle interaction, like excluded volume only. In recent experiments, we have encountered a surprising absence of structure factors (S(q) = 1) in scattering from...
