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Stable Isotope Geochemistry

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Tue, 21 Jan 1997 12:02:02 -0500 (EST)
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"Robert H. Tykot" <[log in to unmask]>
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I second Mark Pollard's recommendation that you look at some of Robert
Hedges' work.  The important consideration with hair is of course that it is
an incremental growth structure and there will likely be considerable
variation in food source from one segment to another.  This is a powerful
advantage if you wish to document dietary changes (I have looked at seasonal
changes in archaeological samples from Peru).  We need about 10 cm of hair
to do the analysis using a Carlo Erba CHN analyzer in line with the SIRA MS;
I line up 10 strands of hair beginning at the root and analyze the bunch in
1 cm segments.  Nitrogen isotopes are also indicative of marine food
consumption, and may be especially important to look at because certain
marine ecosystems have significantly different carbon isotope values.
[obviously the N will be in the consumed protein, not in the fat]

Robert Tykot

At 09:33 AM 1/21/97 GMT+1, you wrote:
>Dear listers
>Does anyone have experiences with 13C-analyses of human nails and
>hair? We are getting involved in a medical study of the influence of
>marine fats on arthrites and want to monitor food intake from 13C 
>in easily accessible body parts. 
>Thanks
>Bjorn Buchardt  
>
**********************************************************
* Dr. Robert H. Tykot            [log in to unmask] * 
* Assistant Professor            813 974-7279; 974-0796  *
* Department of Anthropology     813 974-2668 (fax)      *    
* University of South Florida                            *      
* 4202 East Fowler Avenue                                *
* Tampa, Florida 33620-8100 USA                          *          
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