A proton microprobe scanning across the vertebra of a flat fish,Paralichthys olivaceus |
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Authors: | M Ishikawa T Ishii S Uchida K Kitao |
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Institution: | (1) Division of Marine Radioecology, Nakaminato Laboratory for Radioecology, National Institute of Radiological Sciences, Nakaminato, Ibaraki, Japan;(2) Division of Physics, National Institute of Radiological Sciences, Anagawa 4-9-1, 260 Chiba, Japan |
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Abstract: | Elemental distributions across the vertebra of a flat fish were determined by a 100×300 μm proton scanning microprobe. By
normalizing with proton currents, 22 elements demonstrated characteristic patterns in locality; Si, Ca, Cr, Ga, Sr, and I
were homogeneous across the vertebral centrum, whereas concentrations of P, Ti, V, Co, Ni, Cu, Hg, Se, and Br were increasingly
higher toward the inside of the centrum. Opposite results were obtained for S and Cl, and especially Fe, which showed gradually
lower concentrations toward the center. The K, Mn, and Zn were higher in concentration at both edges, showing a minimum value
at the middle of the vertebra centrum, where Pb was at a maximum in its distribution. The fact that such a thin intervertebrale
membrane contains relatively large amounts of Cl, K, Ca, Fe, Zn, Pb, Br, and I is interesting. |
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Keywords: | PIXE microprobe-scanning flat fish Paralichthys olivaceus vertebra cross-section trace element distribution across vertebra of flat fish |
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