Systematische Fehler bei Enzymbestimmungen

Ohne ZusammenfassungDie ausführliche Veröffentlichung ist erfolgt in Z. Klin. Chem. Klin. Biochem. 6, 259 (1968).     

A hydrodynamic model for profile steepening at resonance absorption

The self-consistent modification of an inhomogeneous plasma density profile near the critical layer due to the ponderomotive force of an obliquely incident p-polarized electromagnetic wave is calculated within a simple hydrodynamic plasma model.     

Lehrbuch der Chemischen Physik

Ohne Zusammenfassung     

Subharmonic transition to turbulence in channel flow

A direct numerical simulation of subharmonic transition to turbulence in channel flow has been performed. The stages of primary and secondary instability have been identified in the results leading to a staggered pattern of A-shaped vortices. The associated staggered symmetry has been found to persist up to rather late stages of the breakdown process. This symmetry rapidly disappears in the final stage of transition and a developed turbulent flow is attained. A pronounced difference in the development between the two channel halves is observed which is consistent with the predictions of secondary instability theory.     

Inhomogeneous fluids of colloidal hard dumbbells: fundamental measure theory and Monte Carlo simulations

Recently, a density functional theory for hard particles with shape anisotropy was developed, the extended deconvolution fundamental measure theory (edFMT). We apply edFMT to hard dumbbells, arguably the simplest non-convex shape and readily available experimentally in the form of colloids. We obtain good agreement between edFMT and Monte Carlo simulations for fluids of dumbbells in a slit and for the same system under gravity. This indicates that edFMT can be successfully applied to nearly all colloidal shapes, not just for the convex shapes for which edFMT was originally derived. A theory, such as edFMT, that allows a fast and general way of mapping the phase behavior of anisotropic colloids, can act as a useful guide for the design of colloidal shapes for various applications.     

Photoionization mass spectrometry of kinetic energy-selected ions. The translational energy distribution of N /N2 in the inner-shell ionization energy range

An ion retarding potential difference (IRPD) method has been used to investigate the ion yield and kinetic energy distributions of N⁺/N₂ produced by photoionization mass specrometry using synchrotron radiation. Photoion yield curves of energy selected N⁺ ions are deduced. Translational energy distribution of N⁺ at energies of the N(1s)→π*, N(1s)→(nl)¹ and above the N(1s)⁻¹ threshold are determined. Comparison is made with previous photoin-photoelectron coincidence work using time-of-flight (TOF) measurements.