[HN Gopher] Scientists use magnetic nanotech to safely rewarm fr...
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       Scientists use magnetic nanotech to safely rewarm frozen tissues
       for transplant
        
       Author : PaulHoule
       Score  : 130 points
       Date   : 2024-09-11 14:51 UTC (8 hours ago)
        
 (HTM) web link (phys.org)
 (TXT) w3m dump (phys.org)
        
       | CoastalCoder wrote:
       | I immediately thought about ice crystals, but the article
       | addresses that:
       | 
       | > Methods have been developed to quickly freeze organs for
       | longer-term storage without risking damage from ice crystal
       | formation, but ice crystals can also form during warming. To
       | address this problem, Yadong Yin and colleagues advanced a
       | technique known as nanowarming, pioneered by collaborator John
       | Bischof, to employ magnetic nanoparticles and magnetic fields to
       | thaw frozen tissues rapidly, evenly and safely.
        
       | hrdwdmrbl wrote:
       | It isn't mentioned, but I would think that this works for
       | cryonics... the ice crystals were one of the biggest sticking
       | points. Well, aside from the original cause of death of course
        
         | PaulHoule wrote:
         | I remember an arc in the _Dick Tracy_ comic strip in the 1980s
         | where the villain was a cryonics expert who had invented some
         | quick way to thaw out corpsicles and thus revive arch criminals
         | of the past.
         | 
         | https://dicktracy.fandom.com/wiki/Dr._Kryos_Freezdrei
        
           | robertlagrant wrote:
           | That is a stellar bad guy name.
        
         | seper8 wrote:
         | First thing that came to my mind too, always wonder whether
         | we'd ever get that far. Can we make our brains persist on ice?
        
         | excalibur wrote:
         | I would say more research needed, but it seems promising to me.
         | After we get it working for transplant organs would probably be
         | a better time to investigate this application.
        
         | idontwantthis wrote:
         | I think the harder part is freezing fast enough. Experiments
         | have been done with freezing and thawing small mammals. They
         | survived but there was a maximum size after which they couldn't
         | be frozen solid pretty much instantly.
        
       | mrcwinn wrote:
       | I have so much respect for David Chang and Christina Tosi. In
       | fact there are Milkbar "crack pies" and Momofuku noodles in my
       | kitchen as we speak.
        
       | Severian wrote:
       | So, induction heating, got it.
        
       | throw310822 wrote:
       | > The second field realigned the nanoparticles, effectively
       | tapping the brakes on heat production. The heating slowed fastest
       | in areas with more nanoparticles
       | 
       | Probably very stupid question, but can this be used also for
       | cooling? Let the nanoparticles absorb some heat, then use a
       | magnetic field to align them, then repeat?
        
         | actionfromafar wrote:
         | First I was going to say no, but now.. maybe?
         | 
         | Like a Peltier element but remotely...
        
         | m3kw9 wrote:
         | who's gonna cool the magnetic dispenser?
        
       | web007 wrote:
       | Reminds me of microwaves - one of the early uses of microwave
       | heating was to reanimate frozen hamsters:
       | 
       | https://en.wikipedia.org/wiki/Microwave_oven#Discovery
        
       | vasco wrote:
       | So all those dreams of freezing your dead body for science to
       | revive you later when it advances weren't that crazy after all.
       | Or at least this might give a renewed source of customers with
       | too much money to grifters promising eternal life.
        
         | echelon wrote:
         | If you're trying to speed run immortality, it's probably best
         | to avoid solutions to longevity that rely on your descendants
         | not turning you into an amusement park ride.
         | 
         | Lots of dead people are going to wake up in horror simulators.
         | Or as Tamagotchi.
        
           | iknowstuff wrote:
           | https://en.m.wikipedia.org/wiki/Anatomy_Park
        
         | radu_floricica wrote:
         | It was never crazy, just... early.
         | 
         | Not being able to hit Pause on a medical issue will probably
         | seem on par with doing healthcare without antibiotics. We
         | simply happen to live in the years before that.
        
       | swader999 wrote:
       | @hansolo
        
       | tke248 wrote:
       | Get this in my microwave stat!
        
       | ImHereToVote wrote:
       | Let's go!
        
       | nullc wrote:
       | Good news: You've been revived!
       | 
       | Bad news: Now you're dying of metallic nano-particle poisoning
        
         | actionfromafar wrote:
         | Chelates for that and so forth and at the end of the chain the
         | gorillas freeze to death in the winter!
        
       | trhway wrote:
       | anybody knows why portable ECMO isn't used for the organs?
        
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       (page generated 2024-09-11 23:00 UTC)