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Related Experiment Video

Updated: Feb 5, 2026

Plasma-Assisted Molecular Beam Epitaxy Growth of Mg3N2 and Zn3N2 Thin Films
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Pectin modification assisted by nitrogen glow discharge plasma.

Mojtaba Momeni1, Mahnaz Tabibiazar2, Sirous Khorram3

  • 1Biotechnology Research Center and Student Research Committee, Department of Food Science and Technology, Faculty of Nutrition and Food Sciences, Tabriz University of Medical Sciences, Tabriz, Iran.

International Journal of Biological Macromolecules
|September 10, 2018
PubMed
Summary

Nitrogen AC glow discharge plasma modifies high methoxy pectin (HMP), increasing its intrinsic viscosity and crystallinity. This plasma treatment offers a promising method for altering pectin's physicochemical and functional properties.

Keywords:
AC glow discharge plasmaModificationPectin

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Area of Science:

  • Food Science
  • Materials Science
  • Plasma Physics

Background:

  • High methoxy pectin (HMP) is a widely used polysaccharide with versatile applications.
  • Modifying HMP can enhance its functional properties for various industrial uses.
  • Plasma treatment is an emerging technology for material surface modification.

Purpose of the Study:

  • To investigate the effects of nitrogen AC glow discharge plasma on the physicochemical and functional properties of high methoxy pectin.
  • To determine the optimal plasma treatment conditions for pectin modification.
  • To evaluate the potential of plasma-assisted modification for pectin applications.

Main Methods:

  • High methoxy pectin (HMP) was treated with nitrogen AC glow discharge plasma.
  • Intrinsic viscosity was measured to assess structural changes.
  • Fourier Transform Infrared Spectrometry (FT-IR) was used to analyze de-esterification.
  • High Performance Size-Exclusion Chromatography (HPSEC) determined molecular weight changes.
  • Rheological properties (storage and loss modulus) and X-ray diffraction (XRD) were employed to study gel characteristics and crystallinity.

Main Results:

  • Intrinsic viscosity of plasma-treated pectin (PTP) increased within 7 minutes and then plateaued.
  • FT-IR analysis indicated an increase in carboxylate peaks, confirming de-esterification.
  • Degree of esterification (DE) decreased in PTP samples.
  • HPSEC showed a reduction in the molecular weight of PTP.
  • PTP gels exhibited higher storage and loss moduli and a narrower linear viscoelastic region.
  • XRD studies revealed increased crystallinity in PTP due to hydrogen bond formation.

Conclusions:

  • Nitrogen AC glow discharge plasma significantly influences the physicochemical and functional properties of HMP.
  • Plasma treatment leads to de-esterification, reduced molecular weight, and increased crystallinity in pectin.
  • The study demonstrates the promising potential of AC glow discharge plasma for effective pectin modification.