I have frozen samples of sunken wood (in seawater).
I want to look at the degradation rates of different kinds of wood and
among other things I would like to look into the stable isotope
signature over time.
Does anyone knows if analyses of 13C and 18O are possible in wood? and
if so, could anyone recomend a laboratory doing those analyses?
Lisa Munro a écrit :
> Hello Brooke,
> I haven't examined the effects of heating on collagen, but if you take
> a look at my papers in P3 they may give you a good understanding of
> the behaviour of the structural carbonate isotopic values with respect
> to burning and boiling of bone.
> Munro, L.E., Longstaffe, F.J. and White, C.D. (2008) Effects of
> heating on the carbon and oxygen-isotope compositions of structural
> carbonate in bioapatite from modern deer bone. Palaeogeography,
> Palaeoclimatology, Palaeoecology. [doi:10.1016/j.palaeo.2008.03.026]
> Munro, L.E., Longstaffe, F.J. and White, C.D. (2007) Burning and
> boiling of modern deer bone: Effects on crystallinity and oxygen
> isotope composition of bioapatite phosphate. Palaeogeography,
> Palaeoclimatology, Palaeoecology. [doi:10.1016/j.palaeo.2007.01.011]
> *Lisa Munro*
> Stable Isotope Research Technologist
> The University of Western Ontario
> Laboratory for Stable Isotope Sciences (LSIS)
> email:/ [log in to unmask]
> website:/ http://www.uwo.ca/earth/LSIS//
> > Date: Mon, 2 May 2011 22:15:52 -0400
> > From: [log in to unmask]
> > Subject: [ISOGEOCHEM] Isotopic effects of heating bone?
> > To: [log in to unmask]
> > I am trying to determine whether or not bone that has been cooked is
> > useful for food web studies. According to DeNiro et al. (1985) the
> > effects of boiling or roasting on carbon and nitrogen isotope values
> > in collagen are <1 permil. Has anyone come across larger isotopic
> > shifts? Also, has anyone tested what happens to carbon and oxygen
> > isotope values in bone carbonate when bone is cooked?
> > Thanks,
> > Brooke
> > ______________________
> > Brooke Crowley
> > Department of Anthropology
> > 19 Russell Street
> > University of Toronto
> > Toronto, ON M5S2S2
> > Canada