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2842 No. 2842
http://singularityhub.com/2011/01/23/food-freezing-technology-preserves-human-teeth-organs-next/
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>> No. 2843
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2843
>So, what do you do to prevent ice crystals during slow freezing? Use magnets.

>magnets
>> No. 2856
>So, what do you do to prevent ice crystals during slow freezing? Use magnets.

How does that work?
>> No. 2858
>>2856
Normally when water cools down, the molecules get all chummy and lock together. The longer the cooling down takes, the bigger the crystals they can make before there's not any free water molecules left.

If the temperature drop happens quickly, the water molecule doesn't have time to form big crystals. You end up with a hodgepodge of small crystals.

Here, the magnets keep the water molecules moving around, which prevents crystal formation. It has to do with the fact that water molecules have polarity due to their charge. Moving the magnetic field around moves the molecules. When you turn off the magnetic field, it's like all the water molecules realize at the same time that "oh shit I need to be ice right now" and make crystals as fast as they can. That way, you end up with a gigantic collection of absolutely tiny crystals.

You can do something similar with unopened bottles of water. If you put a pack of them in the freezer or outside overnight in freezing temperatures, if the water is pure enough it will still be liquid. Any sudden jolt will then cause rapid crystallization (although with water bottles it will still be a slurry). video here http://www.youtube.com/watch?v=fSPzMva9_CE
>> No. 2859
>>2858
Whoops, that should read "polarity due to the partial charges on the oxygen and hydrogens."
>> No. 2870
In other medical science news which might be old or not The Skin Gun. A persons own stem skin cells are used to treat serious burn damage.

http://www.youtube.com/watch?v=eXO_ApjKPaI
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