Measurement of Tannic Substances in Forest Species

Imagem de Miniatura

Data

2018-01-01

Autores

Medeiros, Jordania Xavier de
Calegari, Leandro
Silva, Girlanio [UNESP]
Oliveira, Elisabeth
Pimenta, Alexandre

Título da Revista

ISSN da Revista

Título de Volume

Editor

Univ Federal Rural Rio De Janeiro, Inst Florestas

Resumo

This study aimed to quantify the tannic content of the barks and fruit of angico-vermelho, jurema-preta and acacia-negra using skin powder as detanizador agent. Materials from these species were ground and classified, with 12.5g of air dried particles subjected to extraction using a steam jacket type extractor to obtain 1000 ml of solution, using a completely randomized analytic design. The solution was evaluated using four treatments: angico bark; jurema bark; acacia bark and angico fruit. Three replicates per treatment were realized and subrepetitions were analyzed in triplicate. The results were interpreted by comparison of means with Tukey test at 5% significance. Best results in terms of total solids content, were observed in acacia bark (67.2%), differing statistically for angico bark (63.5%). The soluble solids content, in turn, was superior to angico bark (60.3%), differing statistically from acacia bark (49.8%). No statistically significant differences for tannin content were observed between acacia and angico barks, which presented values of 28.4 and 26.8%, respectively.

Descrição

Palavras-chave

skin powder, extractive, vegetable tannins

Como citar

Floresta E Ambiente. Rio De Janeiro: Univ Federal Rural Rio De Janeiro, Inst Florestas, v. 25, n. 3, 8 p., 2018.

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