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Re: query
This is a possible chemical explanation. In the body fluid environment (pH slightly basic, moderate chloride concentration), americium will almost certainly exist in solution as Am(III). Plutonium, on the other hand, may well be Pu(IV), which forms an intrinsic colloid and would be far less rapidly absorbed through the GI tract.
Ruth
Ruth Weiner
ruthweiner@aol.com
In a message dated 6/29/2004 12:54:15 PM Eastern Daylight Time, "Otto G. Raabe" <ograabe@UCDAVIS.EDU> writes:
>At 07:29 AM 6/29/2004, Bernard Cohen wrote:
>>ICRP Publication 30 gives the absorption thru the G-I tract into the blood
>>stream, f1, to be 5 times higher for Americium than for Plutonium; 5E-4
>>for Am and 1E-4 for Pu. Does anyone know if these values are up-to-date?
>>What is the explanation for this big difference?
>
>**********************************************************
>June 29, 2004
>
>The "effective solubility" of americium dioxide is greater than the
>"effective solubility" of plutonium dioxide. These differences have been
>demonstrated in both in vivo and in vitro studies. Americium is not
>identical to plutonium.
>
>Otto
>
>
>**********************************************
>Prof. Otto G. Raabe, Ph.D., CHP
>Center for Health & the Environment
>(Street Address: Bldg. 3792, Old Davis Road)
>University of California, Davis, CA 95616
>E-Mail: ograabe@ucdavis.edu
>Phone: (530) 752-7754 FAX: (530) 758-6140
>***********************************************
>
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--
Ruth F. Weiner
ruthweiner@aol.com
505-856-5011
(o)505-284-8406
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