TITLE:
Phenolic Profile and Antioxidant Activities of Oil Cake Extracts of Anisophyllea boehmii and Pycnanthus angolensis from Burundi
AUTHORS:
Jonathan Niyukuri, Séverin Sindayikengera, Albert Iribagiza, Emmanuel Banzubaze, Manirakiza Josiane, Ntunzwenimana Mélance
KEYWORDS:
Anisophyllea boehmii, Antioxidant, Burundi, Pcynanthus angolensis, Polyphenols
JOURNAL NAME:
Food and Nutrition Sciences,
Vol.16 No.11,
November
28,
2025
ABSTRACT: This research aims to valorize two wild species: Anisophyllea boehmii and Pycnanthus angolensis from Burundi forests. The antioxidant activities were estimated using 2, 2-diphenyl-b-picrylhydrazyl free radical scavenger and the reducing power assay whereas total polyphenolic (TPC), flavonoids (TFC), and condensed tannins (CTC) contents were examined by colorimetric methods. High-Performance Liquid Chromatography-Mass Spectrometry analysis revealed 14 phenolic compounds in A. boehmii seeds, and 11 were identified. Fifteen phenolic compounds were found in P. angolensis seeds; among them, 12 compounds were identified. Proximate analysis revealed high contents of carbohydrates and proteins, respectively, 63.0% ± 4% and 24.1% ± 3% DM oilcake of A. boehmii, and 59.4% ± 2.4% and 25.6% ± 2.2% DM oilcake of P. angolensis. Both species revealed TPCs and effectiveness antiradical (EA) very interesting and they were respectively 874.97 ± 20.45 GAE/100g and 100 ± 5.6 ml/µg·mim for A. boehmii while 1089.89 ± 293.40 GAE/100g and 13.3 ± 0.5 ml/µg·mim were found in P. angolensis extract. This powerful antioxidant activity observed in both species may be due to the tannin compounds for A. boehmii and flavonoid compounds for P. angolensis. This study suggests that both species analyzed may be a potentially source of natural antioxidants.