Exploring the effect of utilising organic acid solutions in ultrasound-assisted extraction of pectin from apple pomace, and its potential for biomedical purposes

Exploiting residual cocoa biomass to extract advanced materials as building blocks for manufacturing nanoparticles aimed at alleviating formation-induced oxidative stress on human dermal fibroblasts

“… 40 On the other hand, the most critical differences in the vibrations of the spectra of CPHs, commercial pectin, and extracted pectin were evidenced in peaks associated with the degree of esterification (174 3 cm −1 and 1631 cm −1 ), gallic acid (1120–990 cm −1 ), and PEC structure cycle (1300–1000 cm −1 ), as well as in the regions of 1780–1720 cm −1 related to COOH and 1640–1600 cm −1 to COO–. 41 Notably, the pectin obtained by the alkaline method does not present prominent peaks in the regions of 1780–1720 cm −1 and 1640–1600 cm −1 , which explains its low degree of esterification. The chemometric analysis of the three types of pectin showed a distinct clustering trend for each pectin ( Fig.…”