The aim of this research was to graft gallic acid (GA) onto high methoxyl pectin (HMP) through the redox-pair of ascorbic acid (Aa) and hydrogen peroxide (HO) with one- and two-pot procedures. The effectiveness of the both procedures and the chemical, physical and antioxidant properties of the obtained HMP-GA were evaluated. HMP-GA (23.3 ± 0.21 mg GA Equivalent (GAE)/g) and HMP-GA (32.3 ± 0.52 mg GAE/g) were best obtained at HO/Aa molar ratio-HMP/GA weight ratio of 9.0-0.5 and 16.0-0.5, respectively. The UV-Vis and FT-IR spectra and along with their derivative and thermal gravimetric analyses, revealed differences between HMP-GA and HMP-GA. The latter exhibited a greater antioxidant capacity than the former in single electron transfer (ET), hydrogen atom transfer (HAT), and ET-HAT mixed assays. The chemical differences can be attributed to side reactions that may have interfered with the grafting reaction. Consequently, HMP-GA, possessing unique antioxidant and prebiotic properties, can be synthesized through redox-pair procedures.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.foodchem.2024.139865 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Core-shell hydrogel with synergistic super absorption and long-term acid resistance stability: a novel gastric retention drug delivery carrier.
J Mater Chem B
January 2025
College of Materials Science and Engineering, Zhejiang University of Technology, Huzhou 313000, P. R. China.
Traditional natural polysaccharide-based hydrogels, when used as drug carriers, often struggle to maintain long-term stability in the extremely harsh gastric environment. This results in unstable drug release and significant challenges in bioavailability. To address this issue, this study utilized inexpensive and safe natural polysaccharides-chitosan (CS) and high methoxyl pectin (HM)-as raw materials.
View Article and Find Full Text PDFIn Vitro Biological Evaluation and In Silico Studies of a New Anthraquinone From Zingiber Cassumunar Roxb. in Type 2 Diabetes Management.
Chem Biodivers
January 2025
Faculty of Chemistry, University of Science, Ho Chi Minh City, Vietnam.
A novel diphenyl-anthraquinone compound, cassuquinone A (CA), was isolated from the rhizomes of Zingiber cassumunar. Structural elucidation was accomplished using detailed nuclear magnetic resonance and high-resolution mass spectroscopy-electrospray ionization techniques, revealing a symmetrical anthraquinone core with methoxylated aromatic rings. CA exhibited potent α-glucosidase (AR) inhibitory activity with an IC₅₀ of 11.
View Article and Find Full Text PDFOptimization and characterization of physicochemical, morphological, structural, thermal, and rheological properties of microwave-assisted extracted pectin from Dillenia indica fruit.
Int J Biol Macromol
January 2025
Department of Food Engineering and Technology, Tezpur University, Napaam, Sonitpur, Tezpur, Assam, India. Electronic address:
Microwave-assisted extraction of pectin from Dillenia indica (DI) fruit was optimized using Box-Behnken design to maximize yield and quality. Parameters such as solid:solvent (1:10-1:30), microwave power (200-600 W), and extraction time (4-10 min) were varied to determine the optimal conditions. Through experimentation, the optimized extraction parameters were identified as 1:23.
View Article and Find Full Text PDFSynergistically Halogenated and Methoxylated Thiophene Additive Enables High-Performance Organic Solar Cells.
Small
January 2025
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing, 400714, P. R. China.
Morphology control plays a key role for improving efficiency and stability of bulk heterojunctions (BHJ) organic solar cells (OSCs). Halogenation and methoxylation are two separate ways successfully adopted in additives for morphology optimization. In this work, these two strategies are combined together.
View Article and Find Full Text PDFNovel insights into released hydrochar particle derived from typical high nitrogen waste biomass: Special properties, microstructure and formation mechanism.
Waste Manag
December 2024
Key Laboratory of Agro-Environment in Downstream of Yangtze Plain/Scientific Observing and Experimental Station of Arable Land Conservation (Jiangsu), Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China. Electronic address:
Article Synopsis
- Hydrothermal carbonization (HTC) transforms waste biomass, particularly high nitrogen feedstocks like kitchen garbage and blue-green algae, into valuable resources, but the characteristics of small hydrochar particles remain underexplored.
- Hydrochar particles show unique properties such as poor porosity, moderate pH, negative charge, and high hydrophobicity, which differ from the original hydrochar and secondary char derived from simpler biomasses.
- The study identifies complex formation mechanisms through various chemical reactions in the hydrochar microparticles, highlighting their potential as soil fertilizers and decontaminants while emphasizing that effectiveness is influenced by HTC temperature and type of biomass used.
Want 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!