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Abstract
Sacha inchi (Plukenetia volubilis L.) is an oilseed plant that yields a highly nutritious oil. However, its husks and seed shells are under-utilized byproducts. In this study, ethanolic extracts of sacha inchi husks (SI-husk) and seed shells (SI-shell) were obtained using ultrasound-assisted extraction, and the influence of temperature and solvent-to-solid ratio on the yields was evaluated. The total phenolic content, phenolic profile, antioxidant activity, and antimicrobial activity against Gram-positive and Gram-negative bacteria were investigated. Under the selected extraction conditions for SI-husk (60°C, 1:8 s/s, 280 W, 120 min) and SI-shell (60°C, 1:3 s/s, 280 W, 120 min), the total phenolic content was found to be 80.18 ± 0.32 and 50.94 ± 0.48 mg GAE/g, respectively. Cyanidin, naringenin, and kaempferol were principally found in SI-husk (79.4%) and vanillic acid in SI-shell (79.9%). Both extracts exhibited antioxidant activity, with ORAC values of 360.36 ± 0.21 and 228.11 ± 0.14 µmol TE/g, respectively. SI-husk (1 mg) exhibited antibacterial activity against Staphylococcus aureus, with an inhibition zone of 10.5 ± 1.8 mm. Our results provide new insights into sacha inchi byproducts as sources of bioactive compounds with potential health benefits.
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Copyright (c) 2024 Nicole Valeria Polanía Cuellar, Indira Paola Hern´ández Peñaranda, Deicy Villalba Rey, Katherin Natalia Acuña Rodríguez, Franci Nathalie Gómez Jaimes