The research of antioxidants and natural pigments to replace synthetic molecules is increasingly considering wastes from plant food supply chains. Red chicory (RCH) and red cabbage (RCA) are rich sources of polyphenols (PP), especially anthocyanins, well know natural pigments possessing strong antioxidant capacity and beneficial health effects. The aim of this work was to compare different solvents for PP extraction and to evaluate the effect of spray-drying encapsulation using modified starch on PP, antioxidant capacity (AOC) and color properties.Methanol:water (70:30) showed the best extraction capacity, while ethanol:water (70:30) extracts displayed the highest thermal stability. Ethanol:water extracts were spray-dried with a yield of 95-99% for both crops, while the efficiency of PP encapsulation was 79% (RCA) and 88% (RCH). Encapsulation improved retention of PP and AOC upon thermal treatment (RCH: 20-30%, RCA: 44-55%) without altering color properties. This process can be employed for the development of functional foods and supplements.

Microencapsulation by spray-drying of polyphenols extracted from red chicory and red cabbage: Effects on stability and color properties

Zanoni, Francesca;Primiterra, Martina;Zoccatelli, Gianni
2020-01-01

Abstract

The research of antioxidants and natural pigments to replace synthetic molecules is increasingly considering wastes from plant food supply chains. Red chicory (RCH) and red cabbage (RCA) are rich sources of polyphenols (PP), especially anthocyanins, well know natural pigments possessing strong antioxidant capacity and beneficial health effects. The aim of this work was to compare different solvents for PP extraction and to evaluate the effect of spray-drying encapsulation using modified starch on PP, antioxidant capacity (AOC) and color properties.Methanol:water (70:30) showed the best extraction capacity, while ethanol:water (70:30) extracts displayed the highest thermal stability. Ethanol:water extracts were spray-dried with a yield of 95-99% for both crops, while the efficiency of PP encapsulation was 79% (RCA) and 88% (RCH). Encapsulation improved retention of PP and AOC upon thermal treatment (RCH: 20-30%, RCA: 44-55%) without altering color properties. This process can be employed for the development of functional foods and supplements.
2020
Antioxidant capacity (AOC); Microencapsulation; Polyphenols; Red cabbage (Brassica oleracea L. var capitata f. rubra); Red chicory (Chicorium intibus L.); Spray-drying
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/1010364
Citazioni
  • ???jsp.display-item.citation.pmc??? 5
  • Scopus 64
  • ???jsp.display-item.citation.isi??? 56
social impact