Graduate Program in Materials Science and Engineering, Technology Development Center, Federal University of Pelotas, Pelotas 96010-610, Brazil.
Chemical Engineering Department, Federal University of Santa Maria, Santa Maria 97105-900, Brazil.
Molecules. 2022 Oct 13;27(20):6876. doi: 10.3390/molecules27206876.
The study of the recovery of bioactive compounds from natural resources and its implications in several areas is very significant for the scientific community. This work aimed to study Brazilian agroindustrial wastes' antioxidant and antimicrobial activities using green extraction. Olive leaves, jaboticaba peel, araçá peel, and pecan nut shells were evaluated under four conditions: (1) convective-drying and aqueous extraction, (2) convective-drying and ethanolic extraction, (3) freeze-drying and aqueous extraction, and (4) freeze-drying and ethanolic extraction. The results demonstrated that all samples showed high antioxidant potential, and the highest antioxidant activity was obtained for the extract of pecan nut shell. As for the quantification of compounds by HPLC, the olive leaf presented the highest content of phenolic compounds in the extract, mainly oleuropein. Finally, the antimicrobial activity analysis revealed the extracts' bactericidal potential against and . The present study shows that green extraction can extract bioactive compounds with antioxidant and antimicrobial properties, highlighting the importance of choosing the drying method and solvent for future uses of these natural resources by the industry.
从自然资源中回收生物活性化合物的研究及其在多个领域的应用对科学界意义重大。本工作旨在使用绿色提取法研究巴西农业工业废物的抗氧化和抗菌活性。评估了四种条件下的橄榄叶、嘉宝果果皮、树番茄果皮和山核桃壳：（1）对流干燥和水提，（2）对流干燥和乙醇提取，（3）冷冻干燥和水提，以及（4）冷冻干燥和乙醇提取。结果表明，所有样品均表现出高抗氧化潜力，山核桃壳提取物的抗氧化活性最高。至于通过 HPLC 定量化合物，橄榄叶提取物中的酚类化合物含量最高，主要是橄榄苦苷。最后，抗菌活性分析表明提取物对 和 具有杀菌潜力。本研究表明，绿色提取可以提取具有抗氧化和抗菌特性的生物活性化合物，突出了选择干燥方法和溶剂的重要性，以用于未来工业对这些自然资源的利用。
