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Solubilization capacity of nonionic surfactant micelles exhibiting strong influence on export of intracellular

Biyu Kang1, Xuehong Zhang, Zhenqiang Wu

  • 1School of Biological Science and Engineering, South China University of Technology, Guangzhou 510006, China.

Microbial Biotechnology
|February 22, 2013
PubMed

Insights

This study shows nonionic surfactant micelles enhance Monascus pigment extraction by improving solubility and reducing degradation. This offers a greener alternative to organic solvents for perstractive fermentation.

Area of Science:

  • Biotechnology
  • Biochemical Engineering
  • Natural Product Chemistry

Background:

  • Intracellular Monascus pigments are valuable but difficult to extract.
  • Traditional extraction methods often rely on organic solvents, posing environmental concerns.
  • Perstractive fermentation offers a potential route for direct pigment export.

Purpose of the Study:

  • To investigate the use of nonionic surfactant micelle aqueous solutions for perstractive fermentation of intracellular Monascus pigments.
  • To evaluate the impact of nonionic surfactants on pigment export and solubilization.
  • To assess the potential of this method as an eco-friendly alternative to organic solvents.

Main Methods:

  • Perstractive fermentation of Monascus pigments in various nonionic surfactant micelle aqueous solutions.
  • Analysis of cell membrane permeability changes.
  • Quantification of extracellular pigment concentration and degradation.
  • Characterization of micelle properties (type, structure, concentration).

Main Results:

  • Nonionic surfactants modified cell membrane permeability, influencing pigment export rate but not final concentration.
  • Pigment solubilization within surfactant micelles significantly increased final extracellular pigment concentration.
  • Micelle's solubilization capacity varied with surfactant type, structure, and concentration.
  • Degradation of pigments was minimized through export and micelle solubilization.

Conclusions:

  • Nonionic surfactant micelle aqueous solutions effectively enhance intracellular Monascus pigment extraction.
  • This method reduces pigment degradation and offers a viable, eco-friendly alternative to organic solvents in perstractive fermentation.
  • Optimizing surfactant properties is key to maximizing pigment yield.

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