The mixtures of starch and pectin were isolated by sequential extraction of the pulp and peel of black radish taproots Raphanus sativus L. with cold, hot and acidified water, solutions of ammonium oxalate, sodium carbonate and sodium hydroxide. The polysaccharide fractions obtained with ammonium oxalate solutions from the pulp and peel of the taproots gave the highest yields. The pectin was the main polysaccharide component. The yield of pectin (calculated on dry matter) from the pulp was 9.5%, from the peel -10.5%. The polysaccharide fractions obtained from pulp with hot water and ammonium oxalate solutions were subjected to sequential enzymatic degradation by amyloglucosidase and polygalacturonase, followed by fractionation on DEAE-cellulose. NMR spectra showed that rhamnogalacturonan-I (RG-I) and galacturonan (HG) regions are in structure of pectin. RG-I has unbranched structure, since there are no signals of 2,4-rhamnose residues in NMR spectra.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2023.137692 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Modification of iron-containing silicate tailings with oxalic acid to develop a long-efficacy utilization peroxymonosulfate-based system for the efficient decomplexation and removal of Cr(III)-ethylenediamine tetraacetic acid.
J Colloid Interface Sci
December 2024
Department of Environmental Science and Engineering, College of Environment and Resources, Xiangtan University, Xiangtan 411105, China.
Ferrous oxalate (FeCO)-based composite has been recognized as an eminent catalyst for Cr(III)-ethylenediamine tetraacetic acid (Cr(III)-EDTA) decomplexation. However, their practical application has been limited by low cycling capacity and an ambiguous mechanism. In this research, a composite catalyst consisting of biotite loaded with nano FeCO (CFS90) was prepared directly from iron-containing silicate tailing.
View Article and Find Full Text PDFOrganic acid-assisted heat treatment enhances the xanthine oxidase inhibitory activity of Flos Sophorae Immaturus tea.
J Food Sci
December 2024
School of Food Science and Technology, Jiangnan University, Wuxi, China.
Abundant polyphenols in Flos Sophorae Immaturus tea (FSIt) exhibited xanthine oxidase (XO) inhibitory activity. However, the XO inhibitory activity of FSIt was closely related to the processing methods. Herein, organic acids were employed as catalysts for polyphenol conversion during heat treatment and applied to enhance the XO inhibitory activity of FSIt; the potential mechanisms were clarified by polyphenols degradation and conversion analysis, omission experiment, and interaction assay.
View Article and Find Full Text PDFpH and Pectinase Dual-Responsive Zinc Oxide Core-Shell Nanopesticide: Efficient Control of Sclerotinia Disease and Reduction of Environmental Risks.
Nanomaterials (Basel)
December 2024
College of Chemistry and Materials Science, Jinan University, Guangzhou 510632, China.
is one of the fungi that cause plant diseases. It damages plants by secreting large amounts of oxalic acid and cell wall-degrading enzymes. To meet this challenge, we designed a new pH/enzyme dual-responsive nanopesticide Pro@ZnO@Pectin (PZP).
View Article and Find Full Text PDFLinoleic Acid Enhances Renal Tubular Epithelial Cells Autophagy Caused by Calcium Oxalate Monohydrate Crystals.
J Cell Mol Med
December 2024
Suzhou Medical College of Soochow University, Suzhou, Jiangsu, China.
High intake of dietary linoleic acid may increase the incidence of many diseases. The aim of this research is to examine the impact of linoleic acid on the damage caused by calcium oxalate kidney stones on renal tubular epithelial cells. Calcium oxalate monohydrate (COM) crystals were prepared and used to treat HK-2 cells, which were further treated with different concentrations of linoleic acid in vitro.
View Article and Find Full Text PDFDeep eutectic solvent pretreatment of oil palm biomass: Promoted lignin pyrolysis and enzymatic digestibility of solid residues.
Int J Biol Macromol
December 2024
Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China. Electronic address:
Herein, choline chloride/oxalic acid (ChCl/OA) and choline chloride/oxalic acid/ethylene glycol (ChCl/OA/EG) pretreatments of oil palm empty fruit bunches (EFB) and mesocarp fibers (MSF) were conducted to achieve protection of the lignin structure, while improving the enzymatic efficiency of the solid residues. Under the operating conditions of 90 °C and 6 h, ChCl/OA/EG demonstrated a higher lignin extraction selectivity and obtained solid residues with higher hemicellulose content compared to ChCl/OA. The digestibility of glucan and xylan in solid residues obtained using ChCl/OA/EG achieved 98.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!