Microencapsulation of Yerba mate extract: The efficacy of polysaccharide/protein hydrocolloids on physical, microstructural, functional, and antioxidant properties

Amir Akbarmehr; Seyed Hadi Peighambardoust; Maral Soltanzadeh; Seid Mahdi Jafari; Khashayar Sarabandi

doi:10.1016/j.ijbiomac.2023.123678

Microencapsulation of Yerba mate extract: The efficacy of polysaccharide/protein hydrocolloids on physical, microstructural, functional, and antioxidant properties

Int J Biol Macromol. 2023 Apr 15:234:123678. doi: 10.1016/j.ijbiomac.2023.123678. Epub 2023 Feb 15.

Authors

Amir Akbarmehr¹, Seyed Hadi Peighambardoust², Maral Soltanzadeh¹, Seid Mahdi Jafari³, Khashayar Sarabandi⁴

Affiliations

¹ Department of Food Science, College of Agriculture, University of Tabriz, Tabriz 5166616471, Iran.
² Department of Food Science, College of Agriculture, University of Tabriz, Tabriz 5166616471, Iran. Electronic address: peighambardoust@tabrizu.ac.ir.
³ Faculty of Food Science & Technology, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.
⁴ Department of Food Science & Technology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran. Electronic address: Sarabandi_21@yahoo.com.

PMID: 36796563
DOI: 10.1016/j.ijbiomac.2023.123678

Abstract

Effects of hydrolyzed whey protein concentrate (WPC) and its combination with polysaccharides as wall material in spray-drying microencapsulation of Yerba mate extract (YME) have not been investigated yet. Therefore, it is hypothesized that the surface-active properties of WPC or WPC-hydrolysate may improve different properties of spray-dried microcapsules (such as physicochemical, structural, functional and morphological properties) compared to neat MD and GA. Thus, the objective of current study was to produce microcapsules loaded with YME by different carrier combinations. Effect of maltodextrin (MD), maltodextrin-gum Arabic (MD-GA), maltodextrin-whey protein concentrate (MD-WPC), and maltodextrin-hydrolyzed WPC (MD-HWPC) as encapsulating hydrocolloids was studied on physicochemical, functional, structural, antioxidant and morphological characteristics of the spray-dried YME. The type of carrier significantly affected spray dying yield. Enzymatic hydrolysis by improving the surface activity of WPC increased its efficiency as a carrier and produced particles with high production yield (about 68 %) and excellent physical, functional, hygroscopicity and flowability indices. Chemical structure characterization by FTIR indicated the placement of phenolic compounds of the extract in the carrier matrix. FE-SEM study showed that the microcapsules produced with polysaccharide-based carriers were completely wrinkled, whereas, the surface morphology of particles was improved when protein-based carriers were applied. Among the produced samples, the highest amount of TPC (3.26 mg GAE/mL), inhibition of DPPH (76.4 %), ABTS (88.1 %) and hydroxyl (78.1 %) free radicals were related to microencapsulated extract with MD-HWPC. The results of this research can be used to stabilize plant extracts and produce powders with appropriate physicochemical properties and biological activity.

Keywords: Antioxidant activity; Chemical structure; Encapsulation; Spray-drying; Yerba-mate extract.

MeSH terms

Antioxidants* / chemistry
Antioxidants* / pharmacology
Capsules / chemistry
Colloids
Gum Arabic / chemistry
Ilex paraguariensis*
Plant Extracts / chemistry
Plant Extracts / pharmacology
Whey Proteins

Substances

Antioxidants
Capsules
Whey Proteins
Gum Arabic
Colloids
Plant Extracts