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Originally posted by sardion2000
Yeah, they've got up to Pigs now I believe.
Q: Has an animal ever been cryopreserved and revived?
A: Small roundworms (nematodes) and possibly some insects can survive temperatures below -100°C. However, since scientists are still struggling to cryopreserve many individual organs, it should be obvious that no large animal has ever been cryopreserved and revived. Such an achievement is still likely decades in the future.
Frogs, turtles, and some other animals can survive "freezing" at temperatures a few degrees below 0°C. These animals are frozen in the sense that significant fractions of their body water converts to ice. However they are not truly cryopreserved. The fluid between ice crystals is still liquid, chemistry is slowed, not stopped, and the state can only be sustained for a few months. If these animals were cooled to temperatures required for true long-term stability (i.e. below the glass transition temperature) they would not survive. [emphasis mine]
www.alcor.org...
Originally posted by sardion2000
Yeah, they've got up to Pigs now I believe. Complete braindeath for over 2 days and revived with no apparent damage.
[The pigs] temperature is 50 degrees Fahrenheit; brain activity has ceased. Alam checks the wall clock and asks a nurse to mark the time: 11:25 am.
Alam has suspended 200 pigs for an hour each
www.wired.com...
As the temperature drops below -40°C, the cryoprotectant concentration becomes so high in the remaining unfrozen solution that ice stops growing. Cells survive suspended in the residual unfrozen liquid between ice crystals. As the temperature drops below about -100°C, this unfrozen solution containing the cells becomes a glassy solid.
www.alcor.org...
Suspended animation is the technical term for the slowing without termination of life processes by external means. Outside science fiction, the technique as applied to humans is hypothetical. Breathing, heartbeat, and other involuntary functions may still occur, but they can only be detected by artificial means. Extreme cold is used to precipitate the slowing of an individual's functions; use of this process had led to the developing science of cryonics.
Originally posted by sardion2000
Actually no, they both fall under the category of Suspended Animation.
Originally posted by ajh91
Just wondering if any mammals have been reanimated after being cryogenically frozen? [emphasis mine]
after all those pigs would still decompose if they were left in their cooled state for say a month.
Originally posted by sardion2000
They replace the blood with a bio-compatible anti-freeze liquid which seeps into the cells and prevents crystals from forming. To revive the creature, all they did was put the blood back in and raise the temperature.
I'm trying to find the link to the story on ATS and other places as it was posted about before, you may have better luck then I
[edit on 1-9-2006 by sardion2000]
Originally posted by sardion2000
If you flash freeze the bodies all you do is form "smaller" ice crystals which does even more cellular damage then the larger ones. The goal with "freezing" someone is to encase them in a single macro-crystal(which I think is an impossible goal) and the people who paid Alcor to freeze them are idiots IMHO.
after all those pigs would still decompose if they were left in their cooled state for say a month.
It really depends on how much Oxygen is available for decomposition. In this method I posted about, they do their best to remove as much oxygen from the system as possible that will not kill the patient.
In an automated pod environment, I can see the amount of time being stretched even farther(as long as the patient is woken up every so often to check for O2 depravation damage/oxidation damage).
Freezing is just a bad idea, because the more I think about it, the more idiotic it seems. It's not suspended animation, it's suspended decomposition.
Just think about it for a second. Would you rather have yourself frozen after death in a futile attempt to stave death off or would you rather have yourself put into suspended animation long before you are dead to give you and the doctors time to treat whats wrong with you?
[edit on 2-9-2006 by sardion2000]