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Cholesterol reduction from milk using β-cyclodextrin immobilized on glass.

Muhammad Nazir Tahir1, Chanho Kwon, Daham Jeong

  • 1Department of Bioscience and Biotechnology & Center for Biotechnology Research in UBITA, Konkuk University, Seoul 143-701, Republic of Korea.

Journal of Dairy Science
|May 1, 2013
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Summary

Chemically modified beta-cyclodextrin (β-CD) forms a stable monolayer on glass, efficiently reducing cholesterol in milk by over 73%. This immobilized β-CD maintains high efficacy over 10 cycles, offering a durable solution for cholesterol removal.

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Area of Science:

  • Materials Science
  • Biochemistry
  • Food Science

Background:

  • Cholesterol removal from milk is crucial for health and food processing.
  • Beta-cyclodextrin (β-CD) is known for its ability to complex with cholesterol.
  • Immobilizing β-CD on solid surfaces can enhance its reusability and efficiency.

Purpose of the Study:

  • To develop a stable, functionalized glass surface using β-CD for cholesterol reduction in milk.
  • To evaluate the efficiency and reusability of the immobilized β-CD system.
  • To investigate the long-term stability of the β-CD monolayer.

Main Methods:

  • Chemical modification of β-CD to β-CD-undecenyl ether.
  • Covalent attachment of modified β-CD to a glass surface.
  • Characterization using static water contact angle and X-ray photoelectron spectroscopy (XPS).
  • Cholesterol extraction experiments in milk at 25°C, 170 rpm for 4 hours.
  • Repeated use testing for 10 cycles with XPS analysis after cycles.

Main Results:

  • Successful formation of an excellent β-CD monolayer on the glass surface confirmed by contact angle and XPS.
  • Achieved 73.6% cholesterol extraction from milk in 4 hours, a record for immobilized β-CD on solid surfaces.
  • Demonstrated high reusability over 10 cycles with consistent cholesterol reduction (72±2%).
  • XPS analysis confirmed no degradation of the β-CD monolayer after 10 cycles.

Conclusions:

  • The developed β-CD immobilized on glass presents a highly efficient and stable system for cholesterol removal from milk.
  • The unique structure of β-CD contributes to the monolayer's flexibility, efficiency, and long-term stability.
  • This method offers a promising approach for practical applications in food processing and health-related industries.