Androgen sulphate formation in male and female rats

1. After large doses of androsterone, epiandrosterone, dehydroepiandrosterone and testosterone, female rats excreted more of the dose conjugated with sulphuric acid than did the males. 2. Androgens were also incubated with liver slices from male and female rats. Slices from females conjugated androgens with sulphuric acid to a greater extent than did slices from males. 3. The amount of unchanged androgen present in the faeces of orally dosed animals was 4-35% of the dose.     

Cytocatalytic evolution in plants

Low fertility and vigor, and requirements of ecological niches distinct from diploids are not universal characteristics of autoploids. InClaytonia, Hedyotis, Oldenlandia, and other genera, occurrence and frequency of both polyploids and aneuploids within species populations suggest a greater role of such mutations in the evolution of vascular plants than heretofore presumed.