Structural determination of pectin

New pectin derivative (Pec-MA) was obtained in specific reaction conditions. The presence of maleoyl groups in Pec-MA structure was confirmed by 1H NMR and FTIR spectroscopy. The substitution degree of Pec-MA (DS = 24%) was determined by 1H NMR.

7p vihermione 06-01-2023 9 3   Download

Pectins are traditionally divided into two groups, high methoxy and low methoxy. The groupings determine the charge of the pectin and the gelation mechanism. The addition of monovalent ions changed the rheological behavior to resemble that of a strong gel whose properties depended on the type and concentration of the ions.

8p vihermione 06-01-2023 8 2   Download

Pectin is a heterogeneous complex polysaccharide found in the primary cell wall of most cells. In this work, lowmethoxyl pectin was extracted from pumpkin (Cucurbita moschata). The obtained pectin was characterized by GPC FTIR and NMR spectra. The obtain results showed that structural feature of the pectin is a main chain of poly-α(1→4)- D-galacturonic acid and occasionally interrupted by α(1→2)-linked α-L-rhamnopyranose residues and branches Galp is linked to GalpA at C-2 position.

5p cothumenhmong11 06-05-2021 30 2   Download