A recent study conducted by researchers at the Katz School of Yeshiva University has shed new light on the science of food freezing, potentially revolutionizing food preservation techniques.
The research, published in Food Biophysics, could have far-reaching implications for the economy and global food security.
The study, titled “Inverse Relationship Between Ice Nucleation and Ice Growth Rates in Frozen Foods,” delves into the intricacies of ice formation during the freezing process. Led by Dr. Ran Drori, senior author and associate professor at Yeshiva University, the research team employed cutting-edge micro-thermography technology to examine ice nucleation and growth rates in common foods such as beef, zucchini, broccoli, and potatoes.
Surprisingly, the study revealed that beef and zucchini exhibited significantly higher ice nucleation rates compared to broccoli and potatoes. However, once freezing began, broccoli and potatoes displayed faster ice growth. This paradoxical relationship between ice nucleation and growth rates could have significant implications for food preservation strategies.
The research team, which included Shriya Jitendra Kalburge, a student in the Katz School’s M.S. in Biotechnology Management and Entrepreneurship program, also utilized computer simulations to model heat flow through food products during cooling and freezing. These simulations corroborated the experimental findings, providing a comprehensive understanding of the freezing process.
Dr. Drori emphasized the importance of this research in addressing food waste, citing USDA statistics that the United States discards nearly 120 billion pounds of food annually, valued at USD218bn. The study’s findings suggest that customized freezing processes tailored to each food’s specific properties could significantly improve food quality preservation and extend shelf life.
The research also uncovered correlations between ice growth rates and the nutritional composition of foods. Items with higher water content, such as broccoli and potatoes, demonstrated faster ice growth, while foods rich in fat and protein, like beef, froze more slowly.
Supported by the US Department of Agriculture’s National Institute of Food and Agriculture and the Katz School’s Faculty Research Initiative, this study marks a significant step forward in food preservation science. As the world grapples with issues of food security and waste reduction, the insights gained from this research could pave the way for more effective and efficient food preservation techniques, benefiting both consumers and the food industry at large.
Find out more at: https://www.yu.edu/