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Cellulose and Pectic Polysaccharides01:15

Cellulose and Pectic Polysaccharides

Every plant cell has a cell wall that protects the cell, provides structural support, and gives the cell shape. Cellulose, the main structural component of the plant cell wall, makes up over 30% of plant matter. It is the most abundant organic compound on earth.  Cellulose is an unbranched polysaccharide composed of linear chains of glucose molecules linked by β (1→4) glycosidic bonds.
As a cell matures, its cell wall specializes according to its type. For example, the parenchyma cells of...

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Extraction, Purification, Structural Characterization, and In Vitro Simulated Digestion of Polysaccharides from

Hulalai Ayideng1, Shihua Huang1, Bibinuer Yaermaimaiti1

  • 1College of Food Science and Pharmacy, Xinjiang Agricultural University, Urumqi 830052, China.

Foods (Basel, Switzerland)
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Summary

Elaeagnus angustifolia polysaccharide (EAP) extraction and digestion were studied. EAP shows low digestibility, suggesting potential prebiotic properties for gut health.

Keywords:
Elaeagnus angustifolia polysaccharidein vitro simulated digestionpolysaccharideseparation and purificationstructural characterizationultrasound-assisted extraction

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Area of Science:

  • Food Science
  • Biochemistry
  • Plant-based compounds

Background:

  • Medicinal and edible plants offer valuable resources.
  • Elaeagnus angustifolia polysaccharide (EAP) has nutritional value but unclear digestive properties.

Purpose of the Study:

  • To investigate the extraction, structural characterization, and in vitro digestion of EAP.
  • To assess EAP's potential as a functional food ingredient.

Main Methods:

  • Ultrasound-assisted extraction optimized by response surface methodology.
  • Purification using macroporous resin, deproteinization, and dialysis.
  • Characterization via UV, FT-IR, HPLC, GPC, and in vitro digestion using INFOGEST 2.0 model.

Main Results:

  • Optimized extraction yielded 2.44% crude EAP with 87.83% total sugar.
  • Purified EAP (91.07% total sugar) is a pyranose-type polysaccharide rich in glucose, mannose, and galactose.
  • Weight-average molecular weight of EAP was 1.739 × 10^5 g·mol^-1.
  • In vitro digestion showed cumulative digestibility of only 3.30%.

Conclusions:

  • EAP exhibits low gastrointestinal digestibility.
  • This resistance suggests EAP possesses potential prebiotic properties.
  • EAP can be utilized in functional foods for gut microbiota modulation.