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Freezing and Ice Structure Formed in Protein Gels
O Miyawaki1, T Abe1, T Yano1
1a Department of Agricultural Chemistry , The University of Tokyo , Bunkyo-ku, Tokyo 113 , Japan.
Bioscience, Biotechnology, and Biochemistry
|June 10, 2016
Summary
This study analyzed ice crystal growth in frozen soy protein and egg albumin gels. Findings show ice structure size is inversely related to freezing speed, highlighting molecular diffusion
Area of Science:
- Food science
- Materials science
- Physical chemistry
Background:
- Understanding ice crystal formation is crucial for food processing and preservation.
- Previous models for ice crystal growth have limitations in applicability.
Purpose of the Study:
- To photographically analyze ice structure in frozen soy protein curd and egg albumin gel.
- To investigate the relationship between ice structure size, freezing conditions, and heat flux.
- To validate a theoretical model for ice crystal growth.
Main Methods:
- Photographic analysis of ice structures in frozen food gels.
- Controlled freezing experiments under various conditions.
- Measurement of ice structure size at different locations relative to the cooling plate.
Main Results:
- Dendritic ice structures were observed growing parallel to heat flux.
- Mean ice structure size showed an inverse relationship with freezing front speed.
- Supercooling resulted in smaller ice structures due to rapid freezing.
Conclusions:
- Molecular diffusion plays a significant role in ice crystal growth.
- The proposed theoretical model offers a simpler basis and wider applicability than existing models.
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