SANTANA, Gregório Mateus.; PAES, Juarez Benigno.; MORAIS, Rayssa de Medeiros.; LIMA, Carlos Roberto de.; PEREIRA, Andréia Vieira.; SOUZA, Ademilson Daniel de.
Résumé:
The tannins are complex phenolic substances of vegetal origin used in tanning of hides and medicine uses
can represent from 2 to 40% of the dry mass of bark of several forestry species. In these research were
analyzed the levels of tannins in two forest species present in Lameirão Farm vegetavam, located in the
municipality of Santa Terezinha, Paraíba, Brazil.. The samples were air dried and windmill type Willey and
classified of 16 mesh (1.00 mm) and 60 mesh. The obtained material was homogenised and the moisture
content obtained to enable the calculations in a dry basis, of tannin present in each sample. the tannin was
determined by Stiasny’s method. The research assessed the potential of two forest species of occurrence in
the brazilian semi-arid region Were utilized 25 g dry weight of sawdust. The Anadenanthera colubrina
var.cebil presented 23,3% of total solids and Piptadenia estipulaceae, 11%. The Stiasny’s index of
Anadenanthera colubrina var.cebil was 58.8% and P. estipulaceae, 11.8%. According to the highest level of
total solid and the largest Stiasny’s index, the tannin condensed of A. colubrina was 13.95% being greater
than that of P. estipulaceae. The A. colubrina presents good potential as producing of tannins.
