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  • 1
    Digitale Medien
    Digitale Medien
    X-ray microanalysis of monoaminergic terminals in the nucleus tegmentalis dorsalis of the chicken (1984)
    Springer
    Anatomy and embryology 170 (1984), S. 87-91 
    Details
    ISSN: 1432-0568
    Schlagwort(e): Monoamine ; X-ray microanalysis ; Ultrastructure ; Brain stem ; Chicken
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary X-ray microanalysis after aldehyde-chromatedichromate treatment served to confirm the presence of monoaminergic terminals in the nucleus tegmentalis dorsalis (NTD) of the chicken. The monoaminergic terminals were represented as neuronal elements with electron-dense vesicles (EDVs) of several different shapes as seen in Eponembedded semi-thin sections. Conventional electron microscopic observations of the adjacent ultra-thin sections showed the EDVs to be comprised of spherical medium-sized (about 80 nm in diameter), large dense-cored (about 120 nm) and elongated granular vesicles (100–220 nm) in the same nerve varicosities. It is probable that the NTD, being a center of catecholaminergic efferent projections, may also receive direct monoaminergic inputs from an unknown area of the brain and/or from recurrent collaterals of the same catecholamine-containing neurons in the NTD.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00319462
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  • 2
    Digitale Medien
    Digitale Medien
    Catecholamine-containing neurons in the mesencephalic tegmentum of the chicken (1982)
    Springer
    Anatomy and embryology 164 (1982), S. 303-313 
    Details
    ISSN: 1432-0568
    Schlagwort(e): Catecholamine ; Histofluorescence ; Ultrastructure ; Brain stem ; Chicken
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The nucleus tegmentalis dorsalis (NTD) which may be homologous with the mammalian locus coeruleus was investigated in the chicken by means of light, fluorescence and electron microscopy. Results are summarized as follows: 1) Numerous neurons emitting green fluorescence by the Falck-Hillarp method were observed in the NTD of the chicken. By consecutive light and fluorescence microscopy of the same section it was established that these catecholamine(CA)-containing neurons clearly coincided with the cell group named nucleus tegmentalis dorsalis by Jungherr (1945). This procedure further showed that there were also non-fluorescent neurons in the NTD. 2) On the basis of electron microscopic observation, two types of neurons were recognized in the NTD: medium-(15–25 μm) and small-sized (10–15 μm) neurons. Medium-sized neurons had a round to oval nucleus with several deep infoldings and abundant organelles. From combined fluorescence and electron microscopic examination, they obviously corresponded with CA-containing neurons demonstrated by the Falck-Hillarp method. Small-sized neurons had a round nucleus surrounded by pale cytoplasm. They corresponded with non-CA-containing neurons. 3) From morphometric analysis, it was clear that CA-containing neurons contained a well-developed rough-surfaced endoplasmic reticulum and many lysosome-like dense bodies, unlike non-CA-containing neurons. This study was undertaken as the basis of a research program to elucidate the catecholaminergic projections from the NTD.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00315753
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  • 3
    Digitale Medien
    Digitale Medien
    Unusual mitochondrial ultrastructure in the pig adrenal cortex (1978)
    Springer
    Cell & tissue research 187 (1978), S. 129-134 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Adrenal cortex (Pig) ; Mitochondria ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Unusually large mitochondria with few cristae were observed in the cells of the boundary layer between the zonae fasciculata and reticularis of the pig adrenal. These mitochondria occasionally contained parallel arrays of beaded filaments which appeared to be composed of repetitive electron opaque particles, measuring 10 to 11 nm in diameter. The possibility that these filaments are arranged in closely packed arrays of tubular structures with a central filament is discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00220624
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  • 4
    Digitale Medien
    Digitale Medien
    Correlative light-, fluorescence- and electron-microscopic studies of catecholamine-storing cells in the adrenal medulla of the domestic fowl (1981)
    Springer
    Cell & tissue research 217 (1981), S. 471-477 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Adrenomedullary cells ; Light-, fluorescence- and electronmicroscopy ; Domestic fowl
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Correlative light-, fluorescence- and electron-microscopic examinations of catecholamine-storing cells in the adrenal medulla of the domestic fowl present unequivocal criteria to identify two types of avian adrenomedullary cells. A modified Karnovsky's fixative containing s-collidine was found to be a reliable prefixative to obtain a characteristic feature of the secretory granules in adrenaline- and noradrenaline-storing cells consistently.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00219358
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