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From Freezing to Hibernation

From Freezing to Hibernation. Physical Property: Freezing Antifreeze Hibernation. Water. Pure water freezes at 0 o C. Freezing Point Lowering (phys prop) 29.2 g NaCl (table salt) in 1 kg water freezes at -1.85 o C. Apply salt (NaCl, CaCl 2 ) or CMA to icy roads

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From Freezing to Hibernation

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  1. From Freezing to Hibernation Physical Property: Freezing Antifreeze Hibernation

  2. Water • Pure water freezes at 0 oC. • Freezing Point Lowering (phys prop) • 29.2 g NaCl (table salt) in 1 kg water freezes at -1.85 oC. • Apply salt (NaCl, CaCl2) or CMA to icy roads • http://www.usroads.com/journals/p/rmj/9712/rm971202.htm • Add antifreeze to car radiator water to lower FP to -50 oC

  3. Antifreeze Protein in Snow Fleas • Scientists discovered a protein in snow fleas which protect them against freezing. • If this protein can be isolated, it might be used to • inhibit ice growth by about 6 oC. • increase frost resistance in plants • Increase storage time of organs for transplant • http://www.physorg.com/news7456.html

  4. Hibernation • When animals hibernate, their body temp, heart rate and metabolism decrease dramatically. This allows them to go for long periods of time without food and water. They are in a state called “torpor”. • Potential benefits for organ transplants, trauma survivors, surgical patients. • http://www.usatoday.com/tech/science/discoveries/2006-01-23-hibernation_x.htm • http://www.d.umn.edu/biology/faculty/Andrews_page.htm

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