Uploaded November 2025 | Updated September 2026, 3 weeks ago
I explain how low temperatures slow down the metabolism and reproduction of bacteria and fungi, keeping food fresh longer. I describe how microbes use digestive enzymes to break down food, and why freezing almost completely stops their activity. I also talk about boiling and how high heat denatures proteins in microbial cells, killing them irreversibly and making food safe.
00:00: Introduction to why we use refrigeration and freezing to preserve food.
00:20: How low temperatures slow down the metabolism of microbes.
01:28: Why freezing food stops microbial activity almost completely
02:40: The irreversible effect of high temperatures on microbial enzymes.
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I explain how low temperatures slow down the metabolism and reproduction of bacteria and fungi, keeping food fresh longer. I describe how microbes use digestive enzymes to break down food, and why freezing almost completely stops their activity. I also talk about boiling and how high heat denatures proteins in microbial cells, killing them irreversibly and making food safe.
00:00: Introduction to why we use refrigeration and freezing to preserve food.
00:20: How low temperatures slow down the metabolism of microbes.
01:28: Why freezing food stops microbial activity almost completely
02:40: The irreversible effect of high temperatures on microbial enzymes.
🎈 SUPPORT - Become a Patron: patreon.com/microbehunter
🖂 NEWSLETTER - microbehunter.com/newsletter-signup
💻 WEBSITE - microbehunter.com
![[MH022] What is the best microscope?](https://i.ytimg.com/vi/NhE0VESOWdY/mqdefault.jpg "[MH022] What is the best microscope?
The best microscope is the one that you will use the most often. But on the more serious side: In this episode I will outline some of the quality considerations of microscopes, and this is not only limited to mechanical Read More ... (https://www.microbehunter.com/podcast/mh022-what-is-the-best-microscope/)")
