Re: calculation of dose to biota -Reply

[xat@inel.gov (Alden Tschaeche)]

Joyce Davis wrote:
> 
> In the old days the REM was sometimes defined as "Roentgen Equivalent
> Mammal" (and sometimes as "Roentgen Equivalent Man").  That led me to
> infer that the RBEs for most mammals were close enough to each other
> that at least in the first approximation,  the same one could be applied for
> all for HP work.  Reptiles and crustacea,et al, are another story
> altogether.
> 
> J P Davis
> joyced@dnfsb.gov

If by "first approximation" you mean a factor of ten, I agree.  However,
the LD50 for different mammals is different by almost that much at the
extremes.  Doesn't that indicate that indicate different RBEs for the
different speces?  Al Tschaeche xat@inel.gov