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Manfred comments on Cryo with magnetics added - Less Wrong
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The most striking problem with this paper is how easy all of the tests of viability they used are to game. There are a bunch of simple tests you can do to check for viability, and it's fairly common for non-viable tissue to produce decent-looking results on at least a couple, if you do enough. (A couple of weeks ago, I was reading a paper by Fahy which described the presence of this effect in tissue slices.)
It may be worth pointing out that they only cooled the hearts to -3 C, as well.
Yeah, -3 C was exactly as intended by the authors, since they were (supposedly) suppressing the freezing of water in the experimental group - much colder and the water in their experimental organs would have stopped being liquid :)