Ulrich Zweifel

Structure/activity relationships of the genotoxic potencies of sixteen pyrrolizidine alkaloids assayed for the induction of somatic mutation and recombination in wing cells of Drosophila melanogaster

H. Frei, Jürg Lüthy, Julia Brauchli et al. · Chemico-Biological Interactions · 1992 · 98 citations

Pharmacy, Pharmacology, Toxicology +12

Transfer of orally administered 3H-seneciphylline into cow's milk

Urs Candrian, Ulrich Zweifel, J. Luethy et al. · Journal of Agricultural and Food Chemistry · 1991 · 19 citations

Pharmacy, Food Science, Pharmacokinetics +7

Differential toxicity of cocaine and its isomers, (+)-cocaine and (−)-Ψ-cocaine, is associated with stereoselective hydrolysis by hepatic carboxylesterases in cultured rat hepatocytes

Russell B. Melchert, Christian Göldlin, Ulrich Zweifel et al. · Chemico-Biological Interactions · 1992 · 13 citations

Pharmacy, Pharmacology, Toxicology +14