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Microwave Ultrasound Cryonics

Control temperature with microwaves and use ultrasound to control crystallization
  [vote for,

Microwaves can in principle control temperature from inside of a body, and ultrasound has been shown to be able to "control the rate of crystal growth, ensuring small and even-sized crystals are formed, and can prevent fouling of surfaces by the newly formed crystals" (link).

A simple idea would be to combine the two, in order to slowly traverse the crystallization barrier with minimal damage, but I didn't find any attempts to that.

Mindey, Apr 03 2016

innovativeultrasonics.com http://www.innovati...ns/crystallization/
[Mindey, Apr 03 2016]

EM radiation as crystal catalyst
vaguely related [xaviergisz, Apr 06 2016]

Effects of Magnetic fields on freezing. https://onlinelibra...111/1541-4337.12202
[Mindey, Nov 05 2019]


       // Microwaves can in principle control temperature from inside of a body //   

       Do you mean a living human body by any chance ?   

       Do you understand the properties of microwave radiation and the importance of Specific Asorbtion Ratios ?   

       If not, this idea is going to end badly.
8th of 7, Apr 04 2016

       I'll just "wave" as you go by...
normzone, Apr 04 2016

       //Microwaves can in principle control temperature from inside of a body// I don't think you meant to say what you think you said.
MaxwellBuchanan, Apr 04 2016

       [8th of 7], very good point, this idea would probably bake non-uniformly, though pattern randomization, and entropic heat transfer to colder regions, at low power, would help.   

       [MaxwellBuchnan], yes, the word "control" -> "increase temperature" through microwave absorption. Or is there something else that bothers you?   

       [normzone], I would consider this is the dumbest idea I had ever come up with, but I would still find it interesting to see what happens if you freeze, even a cup of water while running ultrasound, and reducing its refrigeration rate with low power randomized pattern microwaves.   

       While you can reduce the ambient temperature very slowly without microwaves, introducing microwaves in low powered randomized pattern unfreeze at random locations, and maybe let some of the tensions within ice to even-out before they result in fractures.   

       So, I would consider this baked, if experiments of freezing at least a glass of water with different microwave and ultrasound patterns to see if you can control where the fractures occur, and how uniformly it freezes using these means... and maybe you would want not just ultrasound, but sound with more diverse wavelengths.
Mindey, Apr 05 2016

       Skip the microwaves. If it's tissue, use pumped fluid to control temperature. If it's a semisolid or liquid with no veins, you might be able to use a large pressure cylinder to shift temperature to some extent. If that's useful.   

       And the use of ultrasonics is a really good idea. Regarding freezing a cup of water, you would probably get really clear ice. Presently for making ice blocks for ice carving in large freezers, I believe they de-gas the water as much as possible and I believe sometimes people circulate the freezing water so it's flowing water that's freezing onto a large floating crystal. I imagine ultrasound would be easier to manage then trying to run a water pump in a freezer.
steam_cannon, Apr 06 2016

       Cryo-cymatics sounds so much more than cool.   

       It is possible I might have thought of microwaves+freezing to customize crystal growth as regards to tissue (and body) cryogenics. A better frozen head...   

       Another application could be improved activated carbon (charcoal) They soak charcoal with an ionic solution, let it crystallize then wash it out. With carefully sized microcrystals it could have even higher surface area.
beanangel, Jan 11 2018


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