How come when you warm milk up it doesn't spoil? But it does if you leave it out.
2007-05-21 12:35:26 · 6 answers · asked by harleymeagan 2 in Food & Drink ➔ Other - Food & Drink
Bacteria grows well in milk near room temperature. Bacteria are killed off at temps approaching boiling and their growth is slowed down at fridge temps and below. If you leave milk at room temp, the bacteria will keep multiplying, but if you take it from the fridge and heat it up the bacteria won't have enough time to multiply before the temp gets too hot for them.
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2007-05-21 12:47:41 · answer #1 · answered by mattzcoz 5 · 1⤊ 0⤋
Well, all milk will eventually spoil whether it's pasteurized (heated) or not. The reason milk from the grocery keeps so long is because it's not only heated but it's also *sealed* to keep new germs from getting in.
Canning works the same way. Jars are sealed and then heated to kill whatever microbes are inside. Because the jar is closed so tightly, no other microbes can enter.
2007-05-21 19:55:52 · answer #2 · answered by benden 2 · 0⤊ 0⤋
If milk is left out bacteria takes affect which makes the milk go off, but warming it up is a quick process which does not allow the bacteris to get in, therefore it doesn't go off.
2007-05-21 19:50:25 · answer #3 · answered by Mindy 2 · 0⤊ 0⤋
because heating up milk does not have time to spoil.it is heated quickly then used right away...
2007-05-21 19:43:33 · answer #4 · answered by StarShine G 7 · 0⤊ 0⤋
cause bacteria grows and if you warm things it kills it.But if its already bad then cooking it wont help.
2007-05-21 20:05:03 · answer #5 · answered by carin 4 · 0⤊ 0⤋
Good question...Sorry, I dont know the answer to it, but I have always wondered that too...
=]
2007-05-21 19:41:54 · answer #6 · answered by Anonymous · 0⤊ 1⤋