[ExI] Ultra-cryonics

[Eugen Leitl]

On Tue, Mar 19, 2013 at 11:11:34AM +0000, Anders Sandberg wrote:

> Chemical reaction rates follow the Arrhenius equation, r=A*exp(-E/kT),  

Beyond glass point they don't, since reactive moities are locked
in the matrix. See argon matrix for an analogous system.

> where A is a constant, E the activation energy, k the Boltzmann constant  
> constant and T the temperature. If you want the ratio between r at  
> temperature T1 and T0, it is r(T1)/r(T0) = exp(-(E/k)(1/T1 - 1/T0)). So  
> if we have a reaction where E is a few tens of kJ/mol (seems typical for  
> biochemistry) I get E/k around 1000, going from T=300 K to 77 K would  
> give us a rate reduction of 0.00006 - more than four orders of  
> magnitude. Going down to 4 K gives 107 orders of magnitude(!).