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Evaluation of the antioxidant capacity of bioactive compounds and determination of proline in honeys from Pará

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Abstract

Honey is a viscous food, being a complex mixture of substances, among them the main components of honey are: water, minerals, sugars, organic acids, and proteins (enzymes and amino acids). Honey has in its composition compounds that can provide antioxidant properties such as phenolic compounds. This work aimed to evaluate the nutritional composition, the antioxidant capacity of bioactive compounds and to quantify proline in honeys from Pará. Chemical (moisture, protein and ash), physicochemical (hydroxymethylfurfural, reducing and non-reducing sugars, acidity, pH and electrical conductivity) and physical (color) analysis were conducted. Phenolic compounds, flavonoids, antioxidant capacity (ABTS*+ and FRAP), and proline were also evaluated. 62.5% of Apis bee honeys were not within the moisture standards, for stingless bees, there is no official legislation. All the honeys analyzed were within the limit of the legislation in relation to the amount of HMF. High amounts of protein were found, in relation to the consulted literature. The phenolic compounds varied from 4.27 to 145.43 mg/100 g, the flavonoids varied from 2.75 to 18.76 mg/100 g, with higher values than in the literature consulted. The antioxidant capacity by ABTS*+ and FRAP methods had excellent values, being superior to the various works with honey from Brazil and the world. The proline ranged from 6.25 to 144.70 mg/kg. With these results, it was proven that amazonian honeys have antioxidant activity, but the honey harvest needs to be improved, so as not to harm the nutritional components found in its composition.

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Acknowledgements

Acknowledgments to UEPA (University of the State of Pará) for the structure offered, to the Chemistry Laboratory of UEPA-CCNT Belém, FAPESPA, for the scientific initiation scholarship and FAPIC (Federation of Beekeepers of Pará), for the samples given for the realization of this work.

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Correspondence to Iuri Ferreira da Costa.

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da Costa, I.F., Toro, M.J.U. Evaluation of the antioxidant capacity of bioactive compounds and determination of proline in honeys from Pará. J Food Sci Technol 58, 1900–1908 (2021). https://doi.org/10.1007/s13197-020-04701-1

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  • DOI: https://doi.org/10.1007/s13197-020-04701-1

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