Antioxidants from Hyeronima macrocarpa Berries Loaded on Nanocellulose: Thermal and Antioxidant Stability

Abstract

This study investigated the effect of different storage temperatures (35–55 °C) on the bioactive substances and antioxidant properties of Hyeronima macrocarpa berries loaded on nanocellulose. NC was extracted from banana pseudo-stems and presented an interesting surface and porosity properties. The acidified ethanol extract showed better anthocyanin extraction (1317 mg C3G eq./100 g FW) and was used for the preparation of the powdered product, which presented an intense and uniform magenta color, with CIELAB parameters of L* = 59.16, a* = 35.61, and b* = 7.08. The powder exhibited significant stability at storage temperatures of 35 and 45 °C, in which there was no significant loss of anthocyanins or a decrease in antioxidant capacity. In addition, the color was stable for up to 4 months without adding any preservative agent. The anthocyanin-rich extract of H. macrocarpa reached an estimated shelf-life of 315 days (stored at 35 °C), as a result of the impregnation process between the extract and NC, with the ability to protect the bioactives from degradation, due to NC surface properties.

Extraction and characterization of cellulose from cotton flower burr: a noble cellulose source from agro-waste

“…The peaks at 1735 cm − 1 and 1248 cm − 1 link to the stretching vibration of the carbonyl (C = O) group of the acetyl and urate groups present in the hemicellulose [29,30]. This band also indicates the ester group within the carboxylic functional group of phenolic acids like ferulic and p-coumaric, which are part of lignin [29,31]. However, the EC exhibits only characteristic bands associated with pure cellulose material.…”