Chemosystematic Notes on the Asteraceae II. Acyclic Sesquiterpenes

Acyclic sesquiterpenes released by Candida albicans inhibit growth of dermatophytes.

It is unresolved as to whether fungi that share a common skin habitat might in principal interact. In in vitro screening tests with Candida albicans, Trichophytum rubrum and other common dermatophytes, we found C. albicans releases volatile compounds that inhibit growth of the dermatophytes. By applying (enantioselective) gas chromatography combined with mass spectrometry we identified 8 compou...

Phenolics as Chemosystematic Markers in and for the Genus Crepis (Asteraceae, Cichorieae)

In contrast to the huge variety of sesquiterpene lactones reported, only a limited number of flavonoids and phenolic acids are known from the genus Crepis. Compounds detected in the course of this investigation encompass flavonoids luteolin, luteolin 7-O-glucoside, luteolin 7-O-gentiobioside, luteolin 7-Oglucuronide, and luteolin 4’-O-glucoside and caffeic acid derivatives chlorogenic acid, 3,5...

The Isolation and Characterization of Triterpene Saponins from Silphium and the Chemosystematic and Biological Significance of Saponins in the Asteraceae

This paper presents an overview of Dr. Mabry’s accomplishments in his career as a natural product chemist, first at the University of Zürich as a post-doctorate and since 1962 as a faculty member at the University of Texas at Austin in the Department of Botany until the late 1990’s when the Biological Sciences programs at UT-Austin were completely reorganized; then until his retirement in 2006,...

Notes on the Proof of Weil Ii

1.1. Fundamental groups. Let FET/X be the category of schemes finite étale over X. Choose x̄ a geometric point of X. The fiber functor Fx̄ : FET → SET is defined as Fx̄(Y ) = HomX(x̄, Y ). Then the étale fundamental group is defined as π1(X, x̄) = AutFx̄ π1(X, x̄) is a profinite group. If f : X → Y is a morphism, then it induces f∗ : π1(X, x̄) → π1(Y, f(x̄)). In the following, we will often omit the ”ba...

Notes on Sandflies. Part II