[ RadSafe ] coal ash toxicity contribution from uranyl( Threshhold?)

[Jerry Cohen]

The existence of a threshold, or lack thereof, is generally determined by 
committees that review available evidence and make  judgements. This is true in 
both the cases of radioactive and chemical agents. That's how we got the LNT 
nonsense that we seem to be stuck with--and the limitation on exposure to 
carcinogens which apparently is "any is too much".. In both cases, there seems 
to be little, if any, science supporting the decisions, and he who yells the 
loudest, wins the argument. 
Jerry Cohen






________________________________
From: Dan <hotgreenchile at gmail.com>
To: James Salsman <jsalsman at gmail.com>
Cc: "radsafe at health.phys.iit.edu" <radsafe at health.phys.iit.edu>
Sent: Mon, April 5, 2010 6:40:09 PM
Subject: Re: [ RadSafe ] coal ash toxicity contribution from uranyl

In my opinion, like other heavy metals, you have to reach a "threshhold" before 
toxicity is exhibited. Take a look at Otto Raabe's new paper.

Dan ii

Dan W McCarn
HotGreenChile at gmail.com
+1-505-310-3922
Sent from my iPhone

On Apr 5, 2010, at 5:49 PM, James Salsman <jsalsman at gmail.com> wrote:

> How much of the toxicity of coal fly ash is due to uranyl?
> 
> Jones, T. et al (2009) "The geochemistry and bioreactivity of fly-ash
> from coal-burning power stations" Biomarkers  14(S1):45-8 states
> "Fly-ash is a recognized bioreactive material in rat lung, generating
> hydroxyl radicals, releasing iron, and causing DNA damage. However,
> the mechanisms of the bioreactivity are still unclear and the relative
>  contributions of the minerals and leachable metals to that toxicity
> are not well known." -- http://www.ncbi.nlm.nih.gov/pubmed/19604058  /
> http://www.informaworld.com/smpp/content~db=all~content=a913225205
> 
>http://www.scientificamerican.com/article.cfm?id=coal-ash-is-more-radioactive-than-nuclear-waste
>e
> suggests it might be a very substantial portion.
> 
> What are the other top genotoxins in coal ash?
> 
> Which is the best source measuring the combined chemical and
> radiological carcinogenicity of uranyl?
> 
> Sincerely,
> James Salsman
> _______________________________________________
> You are currently subscribed to the RadSafe mailing list
> 
> Before posting a message to RadSafe be sure to have read and understood the 
>RadSafe rules. These can be found at: 
>http://health.phys.iit.edu/radsaferules.html
> 
> For information  on how to subscribe or unsubscribe and other settings visit: 
>http://health.phys.iit.edu
_______________________________________________
You are currently subscribed to the RadSafe mailing list

Before posting a message to RadSafe be sure to have read and understood the 
RadSafe rules. These can be found at: 
http://health.phys.iit.edu/radsaferules.html

For information on how to subscribe or unsubscribe and other settings visit: 
http://health.phys.iit.edu