The Mechanism of Accumulation of Vanadium by Ascidians: Some Progress towards an Understanding of this Unusual Phenomenon

作者: Hitoshi Michibata

DOI: 10.2108/ZSJ.13.489

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摘要: Abstract Since the discovery of vanadium in blood cells (coelornic cells) an ascidian by Henze 1911, this unusual phenomenon has attracted interest many investigators. We started our studies examining contents several tissues from 20 species, collected not only Japanese waters but also Mediterranean since about 18 years ago, using extremely sensitive method, namely, neutron-activation analysis. found highest concentration vanadium, 350 mM, Ascidia gemmata which belongs to suborder Phiebobranchia. This is 107 times higher than that seawater. Among approximately ten types cells, signet ring were revealed be true vanadocytes a combination cell fractionation and Of these vanadocytes, 97.6% was +3 oxidation state while rest +4 state. The A gemm...

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