Polyphenol Content, Antioxidant, and Antibiotic Activities of Pinus Caribaea Morelet Forestry Coproducts

Context and objective In the context of valorization of wood waste from the timber industry, this work aims to study the chemical composition and to evaluate the biological capacities of coproducts from Pinus caribaea Morelet. Methods With this mind, sawdust, bark, and knot-wood from P caribaea were analyzed by high-performance liquid chromatography-mass spectrometry. The antioxidant activities of extracts and reference compounds were assessed in vitro using 2 methods: 2.2-diphenyl-1-picrylhydrazyl and 2.2 '-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid). For antimicrobial evaluation, coproduct extracts were assayed against Staphylococcus aureus, Staphylococcus epidermidis, Escherichia coli, and Candida albicans. Results Despite the variable composition of sawdust, bark, and knot-wood, the composition of P caribaea is typical of the Pinus genus, with the presence of flavonoids, stilbenes, and lignans. Seven compounds were elucidated: 2 lignans (nortrachelogenin and matairesinol), 3 flavonoids (pinocembrin, pinobanksin, pinobanksin 3-acetate), 2 stilbenes (pinosylvin, pinosylvin monomethyl ether), and 1 phenolic acid (caffeic acid). Conclusion The ethanolic extracts of bark and knots showed significant antioxidant activity. The knots showed significant antibacterial properties against S epidermidis.