Wednesday, January 14, 2009

A curiosity

Sometimes I mix an egg with some milk, heat it slightly then give it to the cats. Tonight the stuff they didn't lap up froze almost immediately. When it is frozen, it is almost transparent. The next time a feline comes around I nuke it and it turns white again. I wonder how, why, etc.


Kirkepiscatoid said...

Milk is actually a "colloid suspension", not a mixture or a pure liquid. It is water with emulsified fat globules suspended in it.

Actually at the bottom of the frozen milk is a small layer of the fat globules; they resuspend (but not as well) when thawed, which is why frozen milk that is thawed looks a little watery on top. When you nuke the milk, the globules get re-suspended better.

Sometimes having a previous life teaching high school science comes in handy.

PseudoPiskie said...

Sure helps to have informed friends. Thanks.