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Zinc accumulation in the telencephalon of lizards

✍ Scribed by A. Molowny; J. Martinez-Calatayud; M. J. Juan; F. J. Martinez-Guijarro; C. Lopez-Garcia

Publisher: Springer
Year: 1987
Tongue: English
Weight: 948 KB
Volume: 86
Category: Article
ISSN: 1432-119X
DOI: 10.1007/bf00490264

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✦ Synopsis

The zinc concentration in the brains of two species of lizard was determined by atomic-absorption spectrophotometry. The zinc concentration was found to be highest in the telencephalon of Lacerta galloti (21.1 micrograms/g fresh weight) and Podarcis hispanica (16.77 +/- 0.8 micrograms/g) while the mesencephalon and brain stem exhibited lower zinc concentrations, i.e., 7.0 micrograms/g in Lacerta galloti and 6.08 +/- 0.4 micrograms/g in Podarcis hispanica. This high telencephalic concentration of zinc is paralleled by intense and well-defined Timm reactivity used for demonstrating the presence of zinc-containing boutons at the light-microscope level. Volumetric-densitometric studies of these Timm-reactive zones were performed using serial transverse sections of the same lizard brains.

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