Stephen T. Lee

TL;DR: The results from this study demonstrate that there is a stereoselective difference in the in vitro potencies of the enantiomers of coniine that directly correlates with the relative toxicities of theEnantiomers in vivo.

TL;DR: A simple extraction and rapid reversed phase high-performance liquid chromatography-electrospray ionization-mass spectrometry method was developed for quantifying the major saponins in switchgrass samples and differences in the relative concentrations of different saponin were observed between switchgrass cultivars and plant parts.

TL;DR: The presence of steroidal saponins in two samples of switchgrass that has been implicated in the poisonings of sheep and horses is shown and diosgenin was determined to be the major sapogenin in both switchgrass samples.

TL;DR: Several lupines present on western U.S. rangelands contain alkaloids that are teratogenic to livestock and cause congenital birth defects in calves (crooked calf disease).

TL;DR: Ten species of Palicourea were identified that contained MFA, two previously reported and eight newly reported here; these are closely related to each other, though some other related species did not contain MFA.