Characterization of bark extractives of different industrial Indonesian wood species for potential valorization

Barks are available as waste material and by-product of wood industry. They have been reported to contain interesting molecules and show some bioactivity such as antioxidant and antifungal. This study aimed at evaluating the amounts of extractives in Acacia mangium (acacia), Paraserianthes falcataria (sengon) and Swietenia mahagoni (mahoni) barks, to evaluate their extractive contents and the presence of potential valuable molecules. The extraction method used soxhlet with four different solvents. Antioxidant activity assays were carried out using methyl linoleate and 2,2-diphenyl-1-picrilhidrazyl (DPPH) and the antifungal activity was determinate by fungal growth inhibitions assays. 5.3%–18.5% extraction yields were obtained. All acetone and toluene ethanol extracts show high antioxidant activity by DPPH. The highest antioxidant value obtained by DPPH was obtained for mahoni bark acetone extract with 3.9mg/L of EC50, followed by mahoni bark toluene ethanol 6.8mg/L, acacia bark acetone 7mg/L, and acacia bark toluene ethanol extract 7.4mg/L. Sengon bark extracts had the greatest antifungal activity inhibition. The greatest antioxidant and antifungal activity were obtained with phenolic compounds which were contained in the extracts.

» Author: Nursinta Arifiani Rosdiana, Stéphane Dumarçay, Christine Gérardin, Hubert Chapuis, Francisco José Santiago-Medina, Rita Kartika Sari, Wasrin Syafii, Eric Gelhaye, Phila Raharivelomanana, Rozi Mohammed, Philippe Gérardin

» Reference: Industrial Crops and Products, Volume 108

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This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement N° 690103