Acetone powder from dormant seeds of Ricinus communis L : Lipase activity and presence of toxic and allergenic compounds
2007
Cavalcanti, Elisa D.C. | Maciel, Fabio M. | Villeneuve, Pierre | Lago, Regina C.A. | Machado, Olga L.T. | Freire, Denise M.G.
The influence of several factors on the hydrolytic activity of lipase, present in the acetone powder from dormant castor seeds (Ricinus communis) was evaluated. The enzyme showed a marked specificity for short-chain substrates. The best reaction conditions were an acid medium, Triton X-100 as the emulsifying agent and a temperature of 30°C. The lipase activity of the acetone powder of different castor oil genotypes showed great variability and storage stability of up to 90%. The toxicology analysis of the acetone powder from genotype Nordestina BRS 149 showed a higher ricin (toxic component) content, a lower 2S albumin (allergenic compound) content, and similar allergenic potential compared with untreated seeds. (Résumé d'auteur)
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