首页|Physicochemical characterization and biological potential of Japanese quince polyphenol extract treated by different drying techniques
Physicochemical characterization and biological potential of Japanese quince polyphenol extract treated by different drying techniques
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NSTL
Elsevier
The aim of this study was to determine the effect of different drying methods - freeze drying, spray drying and vacuum drying (at 50, 70, 90 degrees C) - on the quality factors of Japanese quince polyphenol extract, including physical parameters, phenolic compounds, and in vitro biological activities (antioxidant, anti-diabetic, anti-obesity, and anticholinesterase). The highest content of bioactive compounds was observed in samples after freeze drying (total phenolic content - 912.7 g/kg dry weight [dw]; flavan-3-ols - 467.3 g/kg dw). The anti-oxidant activity measured by Oxygen Radical Absorbance Capacity (ORAC) assay was the highest for samples vacuum dried at 70 degrees C (1455.5 mol Trolox/kg dw). Moreover, strong anti-diabetic properties were obtained after vacuum drying, and the samples subjected to freeze drying and spray drying showed the most favorable anti-cholinergic potential. Unfavorable changes in color, formation of 5-hydroxymethylfurfural (5-HMF) and degradation of phenolics were noted along with the increasing drying temperature in vacuum drying. For vac-uum drying, the most optimal temperature is 70 degrees C, as the final product obtained in this way is characterized by favorable physical properties, a beneficial content of biological compounds, a low concentration of undesirable 5-hydroxymethylfurfural and satisfactory biological properties.
NSTL
Elsevier
