Katie Moore, UK finalist
Katie is in the 3rd
year of her DPhil at the University of Oxford. Her research focuses on
localisation of important trace elements in cereal grains at high
using NanoSIMS and is in collaboration with Rothamsted Research. Prior
to this she obtained a MEng
degree in Materials Science at Oxford.
Analysis of Arsenic and Selenium in Cereal Grains
Trace elements are an important part
of our diet, both beneficially and detrimentally. Understanding where
located in crops will help improve diets and avoid exposure to
poisonous contamination. Selenium deficiency is a major problem in the
the majority of the population consuming about half their recommended
daily amount. Conversely the flooding of rice paddy fields in areas such
Bangladesh with arsenic contaminated water has resulted in rice
significant amounts of this toxic and carcinogenic element.
The NanoSIMS is a
state-of-the-art microscope capable of high resolution chemical
imaging (down to 50nm) with the ability to detect low elemental
concentrations (ppm levels). This presentation will show how NanoSIMS
used to investigate the location of two key trace elements, arsenic and
selenium, in rice and wheat grains, respectively, which is a serious
challenge for any other technique.