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  11. Ultrasonic-assisted Extraction Of Polysaccharides From Schizochytrium Limacinum Meal Using Eutectic Solvents: Structural Characterization And Antioxidant Activity

Ultrasonic-Assisted Extraction of Polysaccharides from Schizochytrium limacinum Meal Using Eutectic Solvents: Structural Characterization and Antioxidant Activity

Xinyu Li1, Jiaxian Wang1, Guangrong Huang1

  • 1College of Life Sciences, China Jiliang University, Hangzhou 310018, China.

Foods (Basel, Switzerland)
|June 13, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

This study optimized ultrasonic extraction of polysaccharides from Schizochytrium limacinum meal, achieving a high yield of 9.25%. The extracted polysaccharides (SLMPs) showed significant antioxidant activity linked to their structure and composition.

Area of Science:

  • Marine Biotechnology
  • Food Science
  • Biochemistry

Background:

  • Schizochytrium limacinum meal is underutilized, despite containing polysaccharides with potential applications.
  • Polysaccharides from Schizochytrium limacinum meal (SLMPs) require structural elucidation to understand their activity.
  • Systematic investigation of SLMPs' structure-activity relationships is crucial for their development.

Purpose of the Study:

  • To optimize the extraction of SLMPs using ultrasonic-assisted eutectic-solvent-based methods.
  • To characterize the structure of SLMPs and correlate it with their antioxidant activity.
  • To establish an efficient extraction protocol for SLMPs with preserved bioactivity.

Main Methods:

  • Response-surface methodology (RSM) was used to optimize ultrasonic extraction parameters.
Keywords:
Schizochytrium limacinum mealantioxidant activitypolysaccharidesstructural characterization

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  • Purified SLMPs were analyzed for structural characteristics using FTIR, NMR, and HPGPC.
  • Antioxidant activity was assessed and correlated with molecular weight, monosaccharide composition, and SEM-derived structural features.

    • Main Results:

    • Optimized extraction conditions yielded 9.25% SLMPs, significantly higher than conventional methods (4.18%).
    • SLMPs contained glucose, galactose, and arabinose, with lower molecular weight fractions showing enhanced antioxidant activity.
    • SEM revealed porous structures in SLMPs capable of chelating redox-active functional groups.

    Conclusions:

    • Ultrasonic-assisted eutectic-solvent-based extraction is an effective method for obtaining SLMPs with high yield and preserved antioxidant properties.
    • The study provides a foundation for understanding SLMPs' structure-activity relationships, enabling their future utilization.
    • Optimized extraction conditions and characterization data support the development of SLMPs in various applications.
    ultrasonic-assisted eutectic solvent extraction