期刊
FOOD BIOSCIENCE
卷 50, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.fbio.2022.101997
关键词
Agro-industrial waste; Tangential filtration; Membrane separation; Bioactive compounds; Antioxidant activity
资金
- National Council for Scientific and Technological Development (CNPq - Brazil) [RYC-2015-18795]
- Coordination for the Improvement of Higher Level Personnel (CAPES - Brazil)
- Spanish Ministry of Economy and Competitiveness (MINECO)
- University of Granada
- [407877/2018-5]
In this study, the concentration of guava leaf extract was carried out using nanofiltration technology, which resulted in an increase in phenolic compounds and antioxidant activity. The results suggest that nanofiltration is an efficient method for the recovery and concentration of bioactive compounds, and can be used to obtain functional products and enhance the added value of agro-industrial residues.
Guava leaves (Psidium guajava) are popularly known due to their effects antidiabetic, antihypertensive, anti-inflammatory, antidiarrheal, and functional properties. Processes for the concentration of these extracts are necessary since their pharmacological effects are dose-dependent. In this work, guava leaves aqueous extract (GE) concentration was carried out in nanofiltration (NF) equipment. Process performance was evaluated in terms of permeate flux, flux decline modeling, and extract quality (compounds characterization, total phenolic content and antioxidant activity). NF allowed an increase in phenolic compounds next to 20-times, retention coefficients of total phenolic compounds (99%) and enhanced antioxidant capacity (an increase of 4 and 9-fold for ABTS and DPPH, respectively) compared to the initial GE. Forty-two phenolic compounds were identified, being catechin (594.56 mg mL-1) and vescalagin (295.39 mg mL-1) the main compounds. All phenolics pre-sented a significant increase (p < 0.05) after the concentration suggesting that NF is efficient for the recovery and concentration of bioactive compounds and poses as an alternative to obtain functional products and improve added value in agro-industrial residues.
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