Boron autoradiography of botanical specimens

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Abstract
Boron autoradiographs of plant material may be obtained on a new commercially available "film." Samples and film are placed in a neutron source. The film records the location of boron atoms by detecting alpha particles emitted from boron after neutron capture. The film is completely insensitive to gamma rays, which usually cause undesirable darkening when this technique is used with conventional photographic film. Variation in content of boron in sunflowers grown at varying boron concentrations was easily detected. Boron tends to accumulate at the tip and along the margins of the leaf.

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