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Whey protein concentrate and skimmed milk powder as encapsulation agents for coffee silverskin extracts processed by spray drying

Published online by Cambridge University Press:  06 May 2024

Letícia Ribeiro Barbosa ,
Júlia d'Almeida Francisquini Open the ORCID record for Júlia d'Almeida Francisquini [Opens in a new window] ,
Ana Flávia Lawall Werneck Cerqueira ,
João Paulo Moreira ,
Luciana Poty Manso dos Santos ,
Elita Scio ,
Rodrigo Stephani ,
Ítalo Tuler Perrone ,
Humberto Moreira Húngaro  and
Mirian Pereira Rodarte
Letícia Ribeiro Barbosa
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Júlia d'Almeida Francisquini
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Ana Flávia Lawall Werneck Cerqueira
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
João Paulo Moreira
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Luciana Poty Manso dos Santos
Affiliation:
Laboratory of Bioactive Natural Products, Department of Biochemistry, Biological Sciences Institute, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil
Elita Scio
Affiliation:
Laboratory of Bioactive Natural Products, Department of Biochemistry, Biological Sciences Institute, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-900, Brazil
Rodrigo Stephani
Affiliation:
Department of Chemistry, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Ítalo Tuler Perrone*
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Humberto Moreira Húngaro
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
Mirian Pereira Rodarte
Affiliation:
Faculty of Pharmacy, Federal University of Juiz de Fora, Juiz de Fora, MG, 36036-330, Brazil
*
Corresponding author: Ítalo Tuler Perrone; Email: italotulerperrone@ufjf.br
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Abstract

We tested the hypothesis that milk proteins, through microencapsulation, guarantee protection against bioactive substances in coffee silverskin extracts. Therefore, the aim of this study was to carry out technological, nutritional and physicochemical characterisation of a coffee silverskin extract microencapsulated using instant skim milk powder and whey protein concentrate as wall materials. The aqueous extract of coffee silverskin was spray-dried using 10% (w/v) skim milk powder and whey protein concentrate. The samples were characterised by determining the water content, water activity, particle size distribution, colour analysis and total phenolic compound content as well as antioxidant activity using 2,2-diphenyl-radical 1-picrylhydrazyl scavenging methods, nitric oxide radical inhibition and morphological analysis. The product showed water activity within a range that ensured greater stability, and the reduced degradation of the dried coffee silverskin extract with whey protein concentrate resulted in better rehydration ability. The luminosity parameter was higher and the browning index was lower for the encapsulated samples than for the pure coffee silverskin extract. The phenolic compound content (29.23 ± 8.39 and 34.00 ± 8.38 mg gallic acid equivalents/g for the coffee silverskin extract using skimmed milk powder and whey protein concentrate, respectively) and the antioxidant activity of the new product confirmed its potential as a natural source of antioxidant phenolic compounds. We conclude that the dairy matrices associated with spray drying preserved the bioactive and antioxidant activities of coffee silverskin extracts.

Keywords

Bioactive compoundscoffee wastedairy productsspray-dryer
Type
Research Article
Information
Journal of Dairy Research , First View , pp. 1 - 3
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Hannah Dairy Research Foundation

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