[ RadSafe ] Please Critique This Reply by Rosalie Bertell

[Philippe Duport]

Particles in the 0.001 to 0.1 micrometer behave in the same way as 
unattached radon decay products of the same size.  Aerosl particles of that 
size, owing to their high diffisivity (high diffusion coefficient) are 
deposited in the upper part of the respiratory tract (nose, larynx, trachea, 
main bronchii).  They do not reach the lower parts of the lung, certainly 
not the alveolar region.  Does this help?  Experiments with diffusion 
batteries demonstrate that fairly well.

Philippe Duport


----- Original Message ----- 
From: "Roger Helbig" <rhelbig at california.com>
To: "radsafelist" <radsafe at radlab.nl>
Sent: Tuesday, February 20, 2007 7:14 PM
Subject: [ RadSafe ] Please Critique This Reply by Rosalie Bertell


----- Original Message ----- 
From: "Rosalie Bertell" <rosaliebertell at greynun.org>
To: "'Roger Helbig'" <rhelbig at california.com>
Sent: Tuesday, February 20, 2007 8:45 AM
Subject: RE: Nichols Publish the Truth??????


Dear Roger,

My guess is that you are sending the estimates by the physicists who use the 
ICRP Respiratory Model methodology. This is only valid down to particles of 
aerodynamic diameter of
0.1 micro. DU aerosol has been shown to coalesce into particles of
aerodynamic diameter between 0.001 and 0.1 micron (nano particles).
Therefore they miss some of the most serious effects.

Dr. Rosalie Bertell.


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