Monthly Archives: July 2014
Many animals look for shelter to resist winter. The North American wood frog instead, embraces it and prepares its body to resist a season completely frozen. How do they do it? First, the frog draws water out of its cells to spaces where it would do less damage if it freezes. At the same time, its liver produces large amounts of sugar that act as anti-freeze. Then, the entire animal slowly freezes from the outside until its heart stops beating. When spring arises they come back to life! On the subject, Science Line says: "As the wood frog is freezing, its heart continues pumping the protective glucose around its body, but the frog’s heart slows and eventually stops. All other organs stop functioning. The frog doesn’t use oxygen and actually appears to be dead. In fact, if you opened up a frozen frog, the organs would look like “beef jerky” and the frozen water around the organs like a “snow cone,” says Jon Costanzo, a physiological ecologist at Miami University in Ohio who studies freeze-tolerance. Any ideas on how to use nature's freezing processes to make the world a better place? We would like to share a very interesting video hosted by David Attenborough about the North American wood frog: The Miracle of the Wood Frog. Enjoy! Image taken from ScienceMag.
We like cold: we are based in Canada and manufacture a whole bunch of cooling and freezing equipment. At least, we embrace it! We are very happy to share this great story originally posted by IFLScience from a paper published in Nature Medicine about supercooling organs in order to lengthen the transplant window. To summarize, they excised livers from rats and cooled them down to 4C without completely freezing them to store later at -6C. After three days the livers were ready for transplant and recipients rats were alive for three months after the transplant. You see? Cold is actually, pretty cool! We invite you to read the original post here.