Preview: Forthcoming article in Journal of Applied Crystallography
Forthcoming article in Journal of Applied Crystallography
Journal of Applied Crystallography covers a wide range of crystallographic topics from the viewpoints of both techniques and theory. The journal presents articles on the application of crystallographic techniques and on the related apparatus and computer
Raoult's law revisited: accurately predicting equilibrium relative humidity points for humidity control experiments
The equilibrium relative humidity values for a number of the most commonly used precipitants in biological macromolecule crystallization have been measured using a new humidity control device. A simple argument in statistical mechanics demonstrates that the equilibrium vapour pressure of a solvent is proportional to its mole fraction in an ideal solution (Raoult's law). The same argument can be extended to the case where the solvent and solute molecules are of different sizes.
Combined scanning X-ray diffraction and holographic imaging of cardiomyocytes
This article presents scanning small-angle X-ray scattering (SAXS) experiments performed on the actomyosin assemblies in freeze-dried cardiac muscle cells by scanning the sample through a sub-micrometre focused beam. The scanning SAXS experiments were advantageously combined with full-field holographic imaging to complement the X-ray diffraction with real-space imaging.
SAXS analysis of single- and multi-core iron oxide magnetic nanoparticles
Comprehensive characterization of the morphology of single-core and multi-core magnetic nanoparticle systems for future use as reference materials for magnetic properties was performed using a combination of small-angle X-ray scattering and static light scattering. The composition of the nanoparticle iron oxide cores was determined using XANES.
Application of combined multivariate techniques for the description of time-resolved powder X-ray diffraction data
A method combining different multivariate techniques is applied to the analysis of large datasets of time-resolved X-ray powder diffraction patterns. The method is based on time-window statistical total correlation spectroscopy, which, together with evolving factor analysis and multivariate curve resolution, allows for the identification and the description of the time evolution of the crystalline as well as the amorphous fractions in the sample, in a semi-automated fashion.
Energy-resolved small-angle neutron scattering from steel
A new analysis technique for energy-resolved small-angle neutron scattering is proposed. The precipitate dimensions in steel determined from fitting the observed neutron attenuation spectra agree with those calculated from conventional fitting of the corresponding small-angle neutron scattering profiles.