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      Spray drying encapsulation of stevia extract with maltodextrin and evaluation of the physicochemical and functional properties of produced powders.

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          Abstract

          This work aimed to formulate and perform physicochemical and functional characterization of maltodextrin microcapsules containing ethanolic extract of stevia, rich in antioxidant compounds, encapsulated by a spray-drying process with two maltodextrins (DE10 and DE19). The powders were named M10 and M19, respectively. We analyzed the physicochemical parameters, antidiabetic activity, cytotoxicity, bioaccessibility of the compounds by in vitro digestion, as well as the structure of the microcapsules by scanning electron microscopy. Microcapsules showed higher solubility (∼35%), lower moisture content (∼29%), and the maltodextrin DE10 had higher efficiency as an encapsulating agent (87%) when compared to DE19 (76%) and showed well-defined spherical structures. The microencapsulation preserved the content of phenolic compounds and antioxidant activity present in the extract (7.2% and 87.5%, respectively). The bioaccessibility of these microencapsulated compounds and antioxidant activity were higher under different conditions of in vitro digestion (mouth, gastric, and intestinal conditions) and showed no cytotoxic effects. We identified 41 compounds (by UHPLC-MS/MS-Qtof) related to the nutritional benefits offered by stevia and the microencapsulation technique can be recommended to preserve bioactive compounds. PRACTICAL APPLICATION: Ethanol extract from stevia leaves contains antioxidant phytochemicals related to the nutritional benefits of stevia. However, this extract presents low solubility and consequently low bioaccessibility under in vitro digestion. The microencapsulation process protects the bioactive compounds of the different pH from digestion and improves the physical-chemical parameters of the extract, increasing its applicability as a possible food additive.

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          Author and article information

          Journal
          J Food Sci
          Journal of food science
          Wiley
          1750-3841
          0022-1147
          Oct 2020
          : 85
          : 10
          Affiliations
          [1 ] Postgraduate Program in Food Science, State University of Maringá (UEM), 5790, Colombo Avenue, Zip-code 87020-900, Maringá, Paraná, Brazil.
          [2 ] Biochemistry Department, State University of Maringá (UEM), 5790, Colombo Avenue, Zip-code 87020-900, Maringá, Paraná, Brazil.
          [3 ] Physiological Sciences Department, State University of Maringá (UEM), 5790, Colombo Avenue, Zip-code 87020-900, Maringá, Paraná, Brazil.
          [4 ] Laboratory of Biomolecules and Mass Spectrometry, Chemistry Department, State University of Maringá (UEM), 5790, Colombo Avenue, Zip-code 87020-900, Maringá, Paraná, Brazil.
          [5 ] Postgraduate Program in Cell Biology, State University of Maringá (UEM), 5790, Colombo Avenue, Zip-code 87020-900, Maringá, Paraná, Brazil.
          Article
          10.1111/1750-3841.15437
          32888354
          08df894b-e5e5-4de0-8647-f52584002d3e
          © 2020 Institute of Food Technologists®.
          History

          UHPLC-MS,in vitro digestion,maltodextrin,microcapsules,spray-dryer,stevia leaves

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