Université de Fribourg

The pH induced sol-gel transition in skim milk revisited. a detailed study using time-resolved light and X-ray scattering experiments

Moitzi, Christian ; Menzel, Andreas ; Schurtenberger, Peter ; Stradner, Anna

In: Langmuir, 2011, vol. 27, no. 6, p. 2195–2203

We present a detailed study of the evolution of the size, structure and stability of casein micelles upon acidification of skim milk typically applied in yogurt-making processes using a combination of time-resolved light and small-angle X-ray scattering experiments. While most of the available light scattering studies on casein acidification have been restricted to transparent and therefore...

Université de Fribourg

Morphology and orientational behavior of silica-coated spindle-type hematite particles in a magnetic field probed by small-angle x-ray scattering

Reufer, Mathias ; Dietsch, Hervé ; Gasser, Urs ; Hirt, Ann ; Menzel, Andreas ; Schurtenberger, Peter

In: Journal of Physical Chemistry B, 2010, vol. 114, no. 14, p. 4763-4769

Form factor and magnetic properties of silica-coated spindle-type hematite nanoparticles are determined from SAXS measurements with applied magnetic field and magnetometry measurements. The particle size, polydispersity and porosity are determined using a core−shell model for the form factor. The particles are found to align with their long axis perpendicular to the applied field. The...