Effect of Temperature and Molarity on the Evaluation of Antimicrobial, Cytotoxic, and Antioxidant Activities of the Bio-Oil from Açaí Seed (Euterpe oleracea, Mart.)

Iago Castro da Silva; Pamela Suelen da Silva Seabra; Kely Campos Navegantes Lima; Ricardo Barbosa Bezerra Filho; Alanna Lorena P. dos Santos; Amanda Caroline dos Santos Monteiro; Giovanna Quintero Pamplona; Alexandre Guilherme da Silva Dias; Rayane Caroline dos Santos Pereira; Leticia Araujo Costa; Thays Jhessica Mota Pinheiro; Lauro Henrique Hamoy Guerreiro; Nélio Teixeira Machado; Marta Chagas Monteiro

doi:10.20944/preprints202408.0184.v1

Preprint Article Version 1 This version is not peer-reviewed

Version 1 : Received: 1 August 2024 / Approved: 2 August 2024 / Online: 2 August 2024 (16:44:45 CEST)

Açaí, a fruit from the Amazon, is valuable both economically and nutritionally. Its seeds, often discarded, can be transformed into bio-oil through pyrolysis (a thermochemical degradation process of residual biomass), providing a sustainable alternative to fossil fuels. This study investigates how temperature and molarity influence the antimicrobial, antioxidant, and cytotoxic activities of the produced bio-oil. Tests were conducted using Gas Chromatography-Mass Spectrometry (GC-MS) and assays to evaluate antimicrobial, antioxidant, and cytotoxic activities at different temperatures (350, 400, and 450 °C) and molarities (0.5 M, 1.0 M, and 2.0 M). Phenolic compounds were the most abundant in the bio-oil (55.70%), followed by cyclic and aromatic hydrocarbons (11.89%) and linear hydrocarbons (9.64%). Despite a reduction in oxygenated compounds, the bio-oil maintained bacteriostatic activity against Escherichia coli and Staphylococcus aureus across various temperature ranges, particularly at 350 °C. Antioxidant activity was highest at 350 °C and at lower molarities. Additionally, lower concentrations of acid impregnation exhibited cytotoxic effects at higher temperatures. Thus, bio-oil from açaí seeds produced via pyrolysis demonstrates potential for antioxidant and antimicrobial activities, suggesting viability for further testing at dilutions with lower cytotoxicity.

Açaí; Bio-oil; Pyrolysis

Medicine and Pharmacology, Pharmacy

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Effect of Temperature and Molarity on the Evaluation of Antimicrobial, Cytotoxic, and Antioxidant Activities of the Bio-Oil from Açaí Seed (Euterpe oleracea, Mart.)

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