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06:39
Double-Staining Method to Detect Pectin in Plant-Fungus Interaction
Published on: February 4, 2022
Functionalization of pectin by periodate oxidation.
Bhuvanesh Gupta1, Mythili Tummalapalli, B L Deopura
1Department of Textile Technology, Indian Institute of Technology, Hauz Khas, New Delhi 110 016, India. bgupta@textile.iitd.ernet.in
Carbohydrate Polymers
|August 31, 2013
Summary
Citrus pectin was oxidized with periodic acid to create a dialdehyde material. Optimal conditions like temperature, pH, and solvent composition were identified, revealing simultaneous degradation during oxidation.
Area of Science:
- Food Chemistry
- Polymer Chemistry
- Materials Science
Background:
- High methoxy citrus pectin is a widely available polysaccharide.
- Functionalization of pectin can lead to novel biomaterials.
- Oxidation is a key method for modifying pectin's chemical structure.
Purpose of the Study:
- To prepare a dialdehyde functionalized pectin material.
- To investigate the impact of various reaction parameters on pectin oxidation.
- To characterize the oxidized pectin using FTIR spectroscopy.
Main Methods:
- Oxidation of high methoxy citrus pectin using periodic acid.
- Systematic variation of reaction time, temperature, pH, periodic acid concentration, and solvent composition (water-ethanol).
- Analysis of aldehyde content, intrinsic viscosity, and FTIR spectra.
Main Results:
- Aldehyde content increased with reaction time, temperature, and periodic acid concentration.
- Simultaneous degradation of pectin was observed, indicated by decreased intrinsic viscosity.
- Lower pH and water-ethanol solvent systems (with increased ethanol) favored higher aldehyde generation.
- FTIR spectra confirmed the presence of carbonyl groups (1734 cm⁻¹) and partial ionization of carboxyl groups (1614 cm⁻¹).
Conclusions:
- Reaction conditions significantly influence the yield of dialdehyde pectin.
- Optimizing oxidation parameters is crucial for maximizing functionalization while minimizing degradation.
- The study provides insights into the chemical modification of pectin for potential applications.
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