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Spontaneous fermentation improves the physicochemical characteristics, bioactive compounds, and antioxidant activity of acerola (Malpighia emarginata D.C.) and guava (Psidium guajava L.) fruit processing by-products

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Abstract

This study aimed to investigate the effects of spontaneous fermentation on physicochemical characteristics, bioactive compounds, and antioxidant activity of acerola and guava fruit industrial by-products. Viable cell counts of lactic acid bacterial (LAB) in acerola and guava by-products were ≥ 5.0 log CFU/mL from 24 h up to 120 h of fermentation. Fermented acerola and guava by-products had increased luminosity and decreased contrast. Contents of total soluble solids and pH decreased, and titrable acidity increased in acerola and guava by-products during fermentation. Ascorbic acid contents decreased in acerola by-product and increased in guava by-product during fermentation. Different phenolic compounds were found in acerola and guava by-products during fermentation. Fermented acerola and guava by-products had increased contents of total flavonoids, total phenolics, and antioxidant activity. The contents of total flavonoids and total phenolics positively correlated with antioxidant activity in fermented acerola and guava by-products. These results indicate that spontaneous fermentation could be a strategy to improve the contents of bioactive compounds and the antioxidant activity of acerola and guava by-products, adding value and functionalities to these agro-industrial residues.

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Acknowledgements

The authors thank the CAPES—Coordination for the Improvement of Higher Education Personnel (Brazil) for partially funding this research (Grant number: 001).

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SDO: Conceptualization, Methodology, Formal Analysis, Writing—Original Draft Preparation and Writing—Review and Editing. ELS: Methodology, Formal Analysis, Writing—Review and Editing, Supervision, and Resources. CMA: Methodology and Formal Analysis. ACSM: Methodology and Formal Analysis. GSCB: Methodology and Formal Analysis. MSL: Methodology and Formal Analysis. VBV: Methodology and Formal Analysis. EFG: Methodology and Formal Analysis. MLC: Methodology and Formal Analysis. ALS: Writing—Review and Editing. MEGO: Conceptualization, Data Curation, Resources, Writing—Original Draft Preparation, Writing—Review and Editing, Supervision and Project administration. All authors critically revised the document and agreed on its content.

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Correspondence to Maria Elieidy Gomes de Oliveira.

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Partial financial support was received from CAPES—Coordination for the Improvement of Higher Education Personnel (Brazil), grant number: 001.

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Human participants or animals were not involved in this research.

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de Oliveira, S.D., de Souza, E.L., Araújo, C.M. et al. Spontaneous fermentation improves the physicochemical characteristics, bioactive compounds, and antioxidant activity of acerola (Malpighia emarginata D.C.) and guava (Psidium guajava L.) fruit processing by-products. 3 Biotech 13, 315 (2023). https://doi.org/10.1007/s13205-023-03738-1

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  • DOI: https://doi.org/10.1007/s13205-023-03738-1

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