RESUMEN
Aquafaba is chickpea cooking water. It has great functional properties since it consists of starch and protein. High pressure processing (HPP) is proven to modify the functionality of starch by keeping its integrity. The objective of this study was to check if HPP can improve structural and functional properties of canned aquafaba. HPP treatments were given at pressure levels: 200, 259, 400, 542, and 600 MPa with holding time between 5 and 30 min. After HPP, part of the samples was freeze dried for crystallinity and particle size analysis and the fresh part used for rheological, functional properties, and colour. HPP enhanced functional properties, mostly foaming stability which increased from 50.5 to 67 min. Rheological properties were enhanced mainly for consistency coefficient from 0.6 to 1.4 Pa.s. Crystallinity dropped slightly compared to control sample, while the colour got brighter, from 27.5 to 49.6. Processing time and pressure intensity did not contribute in increasing particle size. The combination of high intensity and long pressurization time resulted the smallest particle size (90 µm).
RESUMEN
The present work aimed to encapsulate the thyme essential oil (TEO) in ß-cyclodextrin (BCD) and γ-cyclodextrin (GCD) complexes in two selected cyclodextrin (CD) to TEO ratios (85/15 and 80/20 w/w) and compare the physicochemical, antioxidant, and antimicrobial properties of the encapsulated powders. The inclusion complexes between CD and TEO were prepared by blending aqueous CD and TEO in ethanol followed by freeze-drying. The powder properties were assessed by measuring particle size and microstructure using SEM, FTIR, and XRD. The median values of the particle sizes (GCD: 92.0 ± 4.69 and BCD: 46.2 ± 2.56-mm) significantly influenced the encapsulation efficiency, resulting in a higher encapsulation efficiency of the GCD (92.02 ± 10.79%) than that of the BCD (56.30 ± 12.19%). The encapsulated GCD/TEO (80/20) showed higher antioxidant activity and an antimicrobial inhibitory effect against Listeria monocytogenes and Salmonella enterica sv. typhimurium. Overall, the GCD acts as a superior wall material to the BCD in the TEO encapsulation.