A chromogenic bioassay was utilized to determine the antithrombin activity
of methylene chloride and methanol extracts prepared from 50 plants of Azor
es. Extracts of the six plants Hedychium gardneranum, Tropaeolum majus, Gun
nera tinctoria, Hedera helix, Festuca jubata and Laurus azorica demonstrate
d activity of 78% or higher in this bioassay system. (C) 2000 Elsevier Scie
nce Ireland Ltd. All rights reserved.