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There are millions of bacteria in each cubic centiliter of milk or most other liquids.
Many come just from being exposed to the air, so milk starts to turn sour as soon as it is milked.
Refrigeration is a way to contain the development and reproduction of these bacteria.
Pasteurization is a way to get rid of the nefarious bacteria, but it doesn't get rid of those that cause souring, for instance. It just postpone it for a few more days compared to raw milk.
The UHT (Ultra high Temperature) process does a better job, increasing the shelf life to several weeks without requiring refrigeration, at the cost of a burned taste.
Modern milking processes limit the exposure to ambient air using vacuum pumps and a neutral gas such as nitrogen, and refrigerating the milk immediately after milking, so our milk keeps longer than it ever did.
Shopping using home delivery is also a way to ensure that the "cold chain" is not interrupted, like when you shop in a supermarket and carry refrigerated milk in an unrefrigerated caddy or the boot of the car. Each minute spent unrefrigerated means tens of thousands of bacteria reproduce.
The souring process is caused by bacteria that convert the lactose sugar of the milk into lactic acid. They do so even in the fridge, just much slower.
What else can I help you with?
What are the advantages of using powered milk?
powdered? it doesn't expire nearly as quickly. Powdered milk may also contain more protein than regular.
What is a sentence for the word expire?
This milk will expire tomorrow.You coupon will expire next week.
What is a sentence using the word expire?
there are many ways to use it, but here is one i can think of off the top of my head: 'when does that milk expire?'
How do you use the word expire in a sentence?
The milk expired yesterday.
Why does milk expire?
its because it isn't water. also you can keep milk past it's "expiration date" by putting it in the fridge.
Does fat free milk expire?
Yes it will spoil. Always check the expiry date.
Why does milk not sink into soil quickly?
Bevause of the viscosity of milk.
When did the alien acts of 1798 expire?
They either expired or were quickly repealed when Jefferson became president in 1801.
Does milk of magnesia expire and how can I tell if it is no longer safe to use?
Yes, milk of magnesia can expire. To determine if it is no longer safe to use, check the expiration date on the packaging. If there is no expiration date, look for any changes in color, texture, or odor, as these can indicate that the product has gone bad. It is recommended to discard milk of magnesia if it is past its expiration date or shows signs of spoilage.
Does milk chocolate expire, and if so, how long does it typically last before going bad?
Yes, milk chocolate can expire. It typically lasts for about 6 to 12 months before it starts to go bad. It is important to check the expiration date on the packaging and store it in a cool, dry place to ensure its freshness.
Why bone fracture heal quickly?
You drink milk
Does fruit loops get soggier in cold or warm milk?
Fruit loops cereal tends to get soggier more quickly in warm milk compared to cold milk. The warmth of the milk can speed up the process of absorbing liquid into the cereal, resulting in a softer texture more quickly.
