The Freezing
Restored from the Empower Network archive (2011–2017), lightly edited to meet our current advertising standards. Views are the original author’s.
The Freezing
In 1912, a naturalist and businessman named Clarence Birdseye came to the Labrador peninsula. Observing the customs of the Eskimos who saw a marvel: “The Freezing” froze caribou reindeer meat, the go surprising, because in the civilized world of course technologically more advanced than i eskimos, Frozen food became indecible. On the contrary, the meat congelda esqimal kept all the flavor.
One day, after catching a fish that solidified almost instantly right out of the water, discovered In the United States because it was working around the slow freezing of meat. while the Eskimos practiced fast. There was the rub. A sudden freeze occurs’ small crystals. and a slow, large, break the cell wall and cause degradation of food. This case shows that, overall, we are interested.
Little cold
As I test, imagine that just get up and prepare the coffee with milk EI breakfast coffee is too hot and decides accelerate the cooling process. Wait 5 minutes before pouring cold milk and then he cast wave wait 5 minutes? And most importantly, has reasons to choose one or the other strategy? Although intuition tells us that we must take milk quickly, it is best to wait first. If all you test mornings, winding Newton discovered that finding and that in his honor is called the Law of Cooling Newton: the speed with which cools a body is proportional to the difference in tempera-structure between this and the surrounding environment. So if cast milk quickly, we will have lowered it do.
Temperature
The difference with the air will be less and cool more slowly. Our ignorance on the subject is ancient and has a very clear because we do not like to spend cold, for what we do to get warm Ie who does not like to see the snow fall comfortably sitting in a warm room? Clear our car in the garage, if I could not would think the same. One of the problems facing the car drivers when low temperatures is that, if they have not been sighted, can freeze the water in the radiator, must avoid pouring an antifreeze like glycerol or ethylene glycol, which decreases the freezing point of water. funny thing is that glycerol found in many places. the biologists maintain their bacterial culture a mixture of water and glycerol (after cooling them to -20 c), and some insects produce it to spend the months of winter dormancy, withstanding temperatures down to -42 c. , Life under the ice? that despite the cracked surface of Europe, one of the satellites of Jupiter, the temperature of -170 C, data sent by the Galileo spacecraft seem to confirm that under a crust of ice several kilometers
There is a huge thick ocean of salt water has been the case of a Bombyx larvae of the spine that after found enclosed in a block of ice for months. resurrected, to put it another way, in the spring. the larvae bore red are another example. of December to February they may be subjected to temperatures refrigeration and do not pass anything. that whether, if done in summer, the larva dies. appears gradually adapt to the cold coming so that, if the Fall has warm side and suddenly a cold Liege inviernal their body not have enough time to acclimatize by many insects that die in the spring after unexpected frost. Through this mechanism · some of these arthropods have colanizaded places as cold as the arctic tundra thus, Groenlandica Gynephoro butterfly lives a hundred kilometers from the North Pole, obviously its production of antifreeze stops due to cold and the larva becomes butterfly after 14 years a human scale, that means overcoming the millennium.
Sometimes the freezing is not so bad.