Slow Freeze Technique
Slow Freeze Technique - Related Videos
02:37
Cryopreservation of Murine Brain by Snap Freezing: A Technique to Rapidly Freeze Whole Mouse Brain Specimen for Histological Analysis
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2023
This video demonstrates the cryopreservation of a mouse’s brain to isolate discrete anatomical areas or specific cell populations from the tumor tissues. This technique is critical in obtaining optimal optical resolution of brain tissue morphology for subsequent analysis.
10:01
Flash-and-Freeze: A Novel Technique to Capture Membrane Dynamics with Electron Microscopy
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Cited by 7 •
2017
We developed a novel technique in electron microscopy, "flash-and-freeze," that enables the visualization of membrane dynamics with ms temporal resolution. This technique combines the optogenetic stimulation of neurons with high-pressure freezing. Here, we demonstrate the procedures and describe the protocols in detail.
11:17
Fundamental Technical Elements of Freeze-fracture/Freeze-etch in Biological Electron Microscopy
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Cited by 6 •
2014
Basic techniques and refinements of freeze-fracture processing of biological specimens and nanomaterials for examination by transmission electron microscopy are described. This technique is a preferred method for revealing ultrastructural features and specializations of biological membranes and for obtaining ultrastructural level dimensional and spatial data in materials sciences and nanotechnology products.
28:32
Flash Freezing and Cryosectioning E12.5 Mouse Brain
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Cited by 6 •
2007
Demonstrated in this video are the techniques for flash freezing and sectioning embryonic brain tissue from mouse. Useful tips for using the cryostat are given, including troubleshooting methods that can be used while cutting to ensure that the resultant tissues sections are free of cracks and other distortions.
03:12
Freezing Point Depression and Boiling Point Elevation
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2020
Boiling Point Elevation The boiling point of a liquid is the temperature at which its vapor pressure is equal to ambient atmospheric pressure. Since the vapor pressure of a solution is lowered due to the presence of nonvolatile solutes, it stands to reason that the solution’s boiling point will subsequently be increased. Vapor pressure increases with temperature, and so a solution will require a higher temperature than will pure solvent to achieve any given vapor pressure, including one...
FAQs
The key control is the cooling rate: gradual temperature reduction gives water time to leave cells before ice forms. This lowers the amount of intracellular water available to crystallize and helps protect cellular structures from damage. Maintaining this balance is central to preserving the viability of cells and tissues after storage.
Cryoprotective agents help reduce intracellular ice formation, which is a major source of damage during freezing. They also help limit injury to cell membranes as biological material passes through subzero temperatures. Their use complements controlled cooling by addressing both the water inside cells and the structural vulnerability of membranes.
Carefully managed warming helps limit recrystallization, in which existing ice structures can change during thawing, and reduces osmotic injury caused by shifts in water movement across cell membranes. The warming stage therefore contributes directly to post-storage viability rather than serving as a simple reversal of the freezing step.
The workflow begins by preparing the biological material with cryoprotective agents, followed by gradual cooling to subzero temperatures. Samples are then maintained at very low storage temperatures. When recovery is needed, they are warmed under carefully managed conditions. Each stage supports the next by limiting ice-related and osmotic damage.
This approach can preserve cultured cells, embryos, sperm, and other biological specimens. The appropriate material depends on the research or clinical context, but the shared goal is to retain viability during storage and recovery. Its range makes the technique relevant to cell-based experiments, reproductive biology, and specimen banking.
By maintaining viable biological material for later recovery, the technique supports reproducible experiments and long-term biobanking. Stored cells, embryos, sperm, and related specimens can provide consistent starting material across studies. In biology, this supports developmental biology and regenerative medicine, while also contributing to assisted reproduction applications.