Desenvolvimento de produto seco por aspersão obtido a partir das cascas do caule de libidibia ferrea martius var. ferrea (fabaceae)

Abstract

Libidibia ferrea popularly known as jucá or pau-ferro is widely used in popular medicine for treatment of diabetes. The tannins are majority chemical constituents. Pharmacological studies, with the stem bark, showed main activities: antimicrobial, hypotensive, vasodilator and hypoglycemiant. This species are inserted in National Formulary Herbal Medicine. The goal of this work is the technological development and characterization of spray dried products from aqueous solution of the stem bark of L. ferrea. The vegetable material of L. ferrea was collected at different times and places from Manaus-AM, being characterized in order to establish parameters for quality control of this species. The dried products were produced using a 23 factorial design, where the independent variable was the type of adjuvant (colloidal silicon dioxide, microcrystalline cellulose and arabic gum) and the dependents variables were biological and technological characteristics of the products obtained. The dried products were evaluated as yielding, residual moisture, rheological properties, morphology, particle size, porosity and behavior in controlled environment with a relative humidity of 65%. In addition, it was evaluated the ability of in vitro inhibition of angiotensin converting enzyme (ACE) and α-glucosidase of the products obtained. Additionally, it was developed and validated an analytical method in liquid chromatography (HPLC) to quantify polyphenols in L. ferrea raw material. The results of raw material characterization demonstrate that were within the limits recommended by the Brazilian Pharmacopoeia. However, there were statistically significant quantitative differences among the samples studied suggesting that climatic conditions change the physico-chemistries characteristics of this species and therefore may influence the quality, efficacy and safety of the products. The HPLC method was validate and it was efficient for the quantification of gallic acid. Considering the dried products the work showed that the adjuvants studied did not contribute to increase the efficiency of dry operation when compared to the dry extract without adjuvant or improve the rheological characteristics. Evaluation of in vitro activity demonstrates that all products from L. ferrea inhibited significantly the enzyme α-glucosidase, however they were no efficient against ACE