Physics – Medical Physics
Scientific paper
Jul 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007nimpb.260..184k&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section B, Volume 260, Issue 1, p. 184-189.
Physics
Medical Physics
Beams In Particle Accelerators, Charged-Particle Spectroscopy, Ecology And Evolution, Meteorite Mineralogy And Petrology, Spectroscopic And Microscopic Techniques In Biophysics And Medical Physics
Scientific paper
Nuclear microprobe methods have been used to investigate the uptake and distribution of various elements by brine shrimps and their unhatched eggs when grown in extracts of the Murchison and Allende carbonaceous meteorites, which were selected as model space resources. Measurements were carried out using a focussed 2 MeV proton beam raster scanned over the samples in order to obtain the average elemental concentrations. Line scans across the egg and shrimp samples show uptake of elements such as Mg, Ni, S and P which are present in the meteorites. The results confirmed that carbonaceous chondrite materials can provide nutrients, including high levels of the essential nutrient phosphate. The concentrations of these elements varied significantly between shrimp and eggs grown in extracts of the two meteorite types, which can help in identifying optimal growth media. Our results illustrate that nuclear microprobe techniques can determine elemental concentrations in organisms exposed to meteorite derived media and thus help in identifying useful future resources.
Barry B.
Kennedy James J.
Markwitz Andreas
Mautner Michael N.
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