A preliminary study of our group demonstrated a promising antioxidant and anticholinesterase activity of three Hippeastrum species (Amaryllidaceae) by bioautography method (Giordani et al.
In previous investigations, this alkaloid also showed inhibitory activity of AChE by bioautography method (Silva, 2005).
localizes antimicrobial activity on a chromatogram using three approaches such as direct bioautography
, contact bioautography
and agar over lay bioautography
(Hamburger and Cordell, 1987, Rahalison et al.
In comparison to bioautography other techniques provide at best, information on antimicrobial activity, they, however, do not give any qualitative information about the active components.
Consequently tannins were removed prior to the bioautography analysis.