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/sci/ - Science & Math

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1573576 No.1573576 [Reply] [Original]

Pray tell me if you get this topic often...
If you can freeze food so it can be reusable later
What are the limitations that prevents us from freezing live humans and de-freezing them months later?

>> No.1573591

1. water in cells
2. uneven freezing

2nd point means that parts of the body are frozen and don't transport oxygen anymore whereas other parts still need oxygen and die.

>> No.1573602

When you freeze food, it sustains damage and loses some of its qualities. They teach this shit in middle school where I live.

Now imagine doing that to a living thing.

>> No.1573605

have you noticed how frozen food tastes differently than fresh food, especially those with high water content? Well, that's because the water inside and around the cells of whatever you're eating has frozen, creating crystals that pierce the membrane of cells. That's why frozen foods have this mushy taste, especially vegetables.

Well, same thing for humans, since we are made of 70+% water. Some animals, especially forest frogs, have the ability to increase the amount of sugar in their blood so that water doesn't freeze. When winter comes, the get underground and freeze completely, all bodily functions stop, brain activity included. When spring comes, everything resumes as normal.

>> No.1575444

>>1573605
Ok, next question in the scientific process then; why can't humans artificially do the same?

>> No.1575934

>>1575444
>>1573605

Large ie crystals can be mitigated by using sugar (as mentioned), which is super hydroscopic, by using alchohol (which usually kills at the amounts we would need), and by freezing VERY quickly, usually by cooling the thing to within a hair of freezing, then dropping the temperature rapidly. All of these avenues can be researched.

Incidentally, it's no coincidence that good ice cream has lots of sugar and a hint of alcohol, and that liquid nitro ice cream tastes great: small ice crystals make good ice cream.

(I swear, Good Eats has taught me more chemistry than school, despite my kickass chem teacher.)

>> No.1576105

>>1573576
you can freeze things perfectly so water molecules dont crystallize and fuck everything up, it makes you into a glass, the problem is we cant unfreeze it the same way, and they start to form crystals and damage organs,

>> No.1576122

what happens if you try to stab a glass human with a broken glass bottle?