We have attempted to reproduce differences in low resolution nuclear magnetic resonance (NMR) T2 spin-spin relaxation times between homeopathically potentised and unpotentised Nitric acid (nit-ac) solutions previously reported by Conte, et al. Using similar instrumentation and experimental protocols, we have shown that it is likely that Conte's original results are attributable to experimental artifact originating in the glassware used for the manufacture of the NMR tubes.

Numerical results for low-field galvanomagnetic transport in a typical modulation-doped n-AIGaAs/GaAs heterostructure are presented. These results are predictions of a theoretical analysis of the quasi-two-dimensional system given in the previous paper. First, data on characteristics of the heterojunction, such as the extent of long-range band bending, the carrier wavefunction, the Fermi energy and the channel carrier density, are displayed and shown to provide a realistic description of the heterojunction. Second, the lowest-order departures of the carrier distribution from its equilibrium values are given in the form of effective relaxation times. The latter exhibit the expected jumps at multiples of the optical phonon energy, one signature of optical phonon emission. Third, the variation with magnetic field and the dependence on temperature of Hall quantities were examined within the assumptions of the heterojunction model. The results appear to represent the ideal situation reasonably well despite some uncertainty in fixing parameters for comparison with available calculations and experiments.