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Hydrophobic Salt-modified Nafion for Enzyme Immobilization and Stabilization
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Diffusion resistance and enzyme activity decay in a pellet.

F H Verhoff1, W E Goldstein

  • 1Department of Chemical Engineering, West Virginia University, Morgantown, West Virginia.

Biotechnology and Bioengineering
|March 1, 1982
PubMed
Summary
This summary is machine-generated.

Diffusion limitation in immobilized pellets affects enzyme decay by altering the Thiele modulus and enzyme form poisoning. This study examines these impacts on glucose isomerase activity.

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Area of Science:

  • Biochemistry
  • Chemical Engineering
  • Enzyme Kinetics

Background:

  • Enzyme immobilization is crucial for industrial applications.
  • Diffusion limitations within immobilized enzyme systems can impact overall reaction rates and stability.
  • Understanding these limitations is key to optimizing enzyme performance.

Purpose of the Study:

  • To investigate the influence of diffusion limitation on enzyme activity decay in immobilized pellets.
  • To analyze the effects of Thiele modulus changes and enzyme form poisoning on enzyme decay.
  • To apply these findings to the specific case of glucose isomerase.

Main Methods:

  • Mathematical modeling of diffusion and reaction within immobilized enzyme pellets.
  • Analysis of Thiele modulus variations under different diffusion conditions.
  • Simulation of enzyme deactivation considering multiple enzyme forms and poisoning.

Main Results:

  • Diffusion limitation significantly affects the effective enzyme activity decay rate.
  • Changes in Thiele modulus and the poisoning of enzyme forms are identified as key consequences of diffusion limitation.
  • The study quantifies the impact of these phenomena on glucose isomerase stability.

Conclusions:

  • Diffusion limitations must be considered to accurately predict and mitigate enzyme activity decay in immobilized systems.
  • Optimizing pellet design and operating conditions can minimize diffusion-related deactivation.
  • This research provides insights for enhancing the longevity of immobilized glucose isomerase.