The Effects of Anisotropic Scattering on Electron Transport

The recently developed theory of Lin et al. has been used to make a systematic study of calculated electron drift velocities and diffusion coefficients. Differences between the usual two-term solution and the converged results are calculated for a number of cases to demonstrate the effects of anisotropic scattering on the interpretation of swarm experiments.

Equivalence of microbiological and hydroxylamine methods of analysis for ampicillin dosage forms

Ampicillin formulations were assayed by microbiological and hydroxylamine methods to determine whether thehydroxylamine analytical method is a suitable substitute for the microbiological method. Paired assay results by the 2 analytical methods were obtained on different strengths of tablet, capsule, and suspension, formulations containing ampicillin and ampicillin degradation compounds. Several statistical tests were used to assess the equivalence of the paired assay results. The data analyses indicate that the hydroxylamine method is a suitable substitute for the microbiological method for potency assays and stability studies of ampicillin formulations. The hydroxylamine method yielded slightly higher assay results than the microbiological method for severely degraded formulations.