Advanced Coatings with Antioxidant and Antibacterial Activity for Kumquat Preservation

Abstract

An active coating is one of the best ways to maintain the good quality and sensory properties of fruits. A new active coating was prepared by incorporating curcumin and phloretin into the konjac glucomannan matrix (KGM-Cur-Phl). The fourier infrared spectroscopy, rheology and differential scanning calorimetry confirmed the successful fabrication of this coating. This coating showed excellent antioxidant activity revealed by the 95.03% of ABTS radicals scavenging ratio and 99.67% of DPPH radicals scavenging ratio. The result of bacteria growth curves showed that it could effectively inhibit the growth of Staphylococcus aureus, Escherichia coli, Listeria monocytogenes and Salmonella typhimurium. The results of firmness, titratable acid and pH showed that it effectively prolonged the shelf life of kumquat. A novel konjac glucomannan-based active coating was provided.

Characterization of Microbial Cellulose Generated in Fermented Moringa and Coated with Flaxseed Mucilage

“…Segwatibe et al (2023) found 50% inhibition of the DPPH radical in moringa leaf extracts;Mondal et al (2022) reported 48.23% in a coating with crude algae extracts Li et al (2022). reported up to 95.03% inhibition by adding curcumin and phloretin to a konjac glucomannan matrix.The total content of phenolic compounds ranged from 103.89 to 112.30 mg GAE/mL, higher in RCD.…”