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Related Experiment Videos

Amylose crystallization from concentrated aqueous solution.

John A Creek1, Gregory R Ziegler, James Runt

  • 1The Pennsylvania State University, 116 Borland Lab, University Park, 16801, USA.

Biomacromolecules
|March 15, 2006
PubMed
Summary
This summary is machine-generated.

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Maize amylose forms spherulites when heated above 170°C and cooled below 70°C. Different cooling conditions create unique semicrystalline or gel-like structures, impacting starch morphology.

Area of Science:

  • Food Science and Technology
  • Polymer Science
  • Materials Science

Background:

  • Starch morphology significantly influences its functional properties.
  • Understanding amylose behavior is key to controlling starch-based material structures.

Purpose of the Study:

  • To investigate the formation of spherulites from maize amylose in concentrated aqueous solutions.
  • To determine the critical temperature and cooling rate parameters for spherulite formation.

Main Methods:

  • Aqueous leaching process to isolate maize amylose.
  • Controlled heating (>170°C) and subsequent cooling experiments.
  • Analysis of resulting semicrystalline and gel-like morphologies.

Main Results:

Related Experiment Videos

  • Amylose (10-20% w/w) forms spherulitic semicrystalline morphology across cooling rates of 1-250°C/min after heating >170°C.
  • A maximum quench temperature of ~70°C is required for spherulite formation.
  • Temperatures between 70-110°C yield a gel-like morphology due to phase separation kinetics.

Conclusions:

  • Temperature-dependent chain conformation critically affects maize amylose spherulite formation.
  • The interplay between liquid-liquid phase separation and crystallization kinetics governs morphology.
  • A liquid crystalline phase may influence the spherulite formation process.