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Formulations for Freeze-drying of Bacteria and Their Influence on Cell Survival
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High efficient freeze-drying technology in food industry.

Yang Liu1, Zhengyu Zhang2, Liandong Hu2

  • 1School of Pharmaceutical Sciences, Zhengzhou University, Zhengzhou, China.

Critical Reviews in Food Science and Nutrition
|January 4, 2021
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Freeze-drying, combining freezing and vacuum drying, is crucial for preserving heat-sensitive drugs and foods. This review covers its principles, methods, and recent advancements in the food industry.

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Freeze-dyingfoodinfluence factorstechnology

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Area of Science:

  • Food Science and Technology
  • Chemical Engineering
  • Materials Science

Background:

  • Freeze-drying (lyophilization) is a sophisticated process involving freezing followed by vacuum sublimation.
  • It is essential for preserving the quality of heat-sensitive materials, including pharmaceuticals and food products.
  • The technology offers significant advantages in extending shelf-life and maintaining product integrity.

Purpose of the Study:

  • To provide a comprehensive summary of freeze-drying technology.
  • To review recent research progress in the application of freeze-drying within the food industry.
  • To detail the definition, principles, steps, advantages, and disadvantages of the freeze-drying process.

Main Methods:

  • Literature review of freeze-drying principles and applications.
  • Analysis of technological parameters and influencing factors in food freeze-drying.
  • Categorization of freeze-dried food products (meat, vegetables, fruits, etc.).

Main Results:

  • Freeze-drying effectively preserves sensitive compounds by minimizing thermal degradation.
  • Key parameters influencing the process include temperature, pressure, and drying time.
  • Recent advancements focus on optimizing energy efficiency and cycle times for food applications.

Conclusions:

  • Freeze-drying is a vital technology for high-value product preservation, particularly in the food sector.
  • Understanding technological parameters is critical for successful implementation and product quality.
  • Continued research is essential for further innovation and broader application of freeze-drying techniques.