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  • 1
    Electronic Resource
    Electronic Resource
    THE CYTOLOGY OF THE ENDOSTYLE OF OIKOPLEURA DIOICA (1965)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 118 (1965), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1965.tb40170.x
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  • 2
    Electronic Resource
    Electronic Resource
    Fine structure of the brain and brain nerves ofOikopleura dioica (Urochordata, Appendicularia) (1990)
    Springer
    Zoomorphology 110 (1990), S. 1-7 
    Details
    ISSN: 1432-234X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Each second brain nerve consists of only one single fibre terminating at two different types of touch receptors in the oral region. The two nerves are the dendrites of two perikarya in the forebrain and are the master neurons for ciliary reversal in the stigmata, which is a two-neuron reflex. By axoaxonal synapses they control one motor neuron in the midbrain, i.e. the command neuron for ciliary reversal in both rings. This cell sends one axon branch in each third nerve to the cilia cells. In the left nerve this fibre is closely associated with a coarsely granulated accessory fibre, which apparently regulates the ciliary beat. The third nerves also contain one fibre each from another motor neuron in the hindbrain. These fibres make synaptic contacts at some specialized epidermal cells in the lateral trunk behind the ciliary rings. A few previously unknown nerves in the dorsal forebrain innervate epidermal cells. It is likely that the complicated epidermal motor innervation regulates the secretory activity of the oikoplasts or of the epidermal cells in constructing a new house, including the necessary complicated filters and food trapping mechanisms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01632806
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  • 3
    Electronic Resource
    Electronic Resource
    The infundibular organ of the lancelet (Branchiostoma lanceolatum, Acrania): an immunocytochemical study (1994)
    Springer
    Cell & tissue research 277 (1994), S. 107-114 
    Details
    ISSN: 1432-0878
    Keywords: Reissner's fiber ; Infundibular organ ; Immunocytochemistry ; Lectin binding ; Flexural organ ; Amphioxus, Branchiostoma lanceolatum (Acrania)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Reissner's fibers are secretions produced by different ependymal areas of the chordate brain, viz., in adult vertebrates, by the dorsal subcommissural organ, and in all stages of cephalochordates (Branchiostoma lancelets), by the ventral infundibular organ. Fibers produced by these different organs are seemingly identical and the two fiber sources also share some immunocytochemical and lectin-binding properties. The secretions in these two glands are, however, not identical; the infundibular organ cells are strongly reactive with antibodies against vertebrate Reissner's fibers, but they do not react with antibodies raised against the source of the vertebrate fibers, viz., the subcommissural organ. The results support the possibility that, in adult vertebrates, the Reissner's fibers are composed of material not only from the subcommissural organ, but also from another, not yet identified, source that is identical or equivalent to the infundibular organ of the lancelet. There are indications that the infundibular organ is immunocytochemically closely akin to some secretory cells in the vertebrate embryonic brain and also to those that produce the juvenile vertebrate Reissner's fibers, viz., secretory cells in the flexural organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303086
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  • 4
    Electronic Resource
    Electronic Resource
    The infundibular organ of the lancelet (Branchiostoma lanceolatum, Acrania): an immunocytochemical study (1994)
    Springer
    Cell & tissue research 277 (1994), S. 107-114 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Reissner's fiber – Infundibular organ – Immunocytochemistry – Lectin binding – Flexural organ – Amphioxus, Branchiostoma lanceolatum (Acrania)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Reissner's fibers are secretions produced by different ependymal areas of the chordate brain, viz., in adult vertebrates, by the dorsal subcommissural organ, and in all stages of cephalochordates (Branchiostoma lancelets), by the ventral infundibular organ. Fibers produced by these different organs are seemingly identical and the two fiber sources also share some immunocytochemical and lectin-binding properties. The secretions in these two glands are, however, not identical; the infundibular organ cells are strongly reactive with antibodies against vertebrate Reissner's fibers, but they do not react with antibodies raised against the source of the vertebrate fibers, viz., the subcommissural organ. The results support the possibility that, in adult vertebrates, the Reissner's fibers are composed of material not only from the subcommissural organ, but also from another, not yet identified, source that is identical or equivalent to the infundibular organ of the lancelet. There are indications that the infundibular organ is immunocytochemically closely akin to some secretory cells in the vertebrate embryonic brain and also to those that produce the juvenile vertebrate Reissner's fibers, viz., secretory cells in the flexural organ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00303086
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  • 5
    Electronic Resource
    Electronic Resource
    The follicular prolactin cells of the primitive teleost Engraulis japonica (1976)
    Springer
    Cell & tissue research 172 (1976), S. 185-194 
    Details
    ISSN: 1432-0878
    Keywords: Hypophysis ; Engraulis japonica ; Prolactin cell ; Orohypophysial duct
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The elopiform teleost Engraulis japonica was used for a light and electron microscopical study of the follicle epithelium in the rostral pars distalis of the pituitary. In this species, which has one large follicle in the anterior hypophysis, there is no persistent orohypophysial duct in postmetamorphic stages. The apical pole of the prolactin cells is almost completely overlaid by a surface layer of flattened epithelial cells with a thick glycocalyx. The prolactin cells reach the follicular lumen through “pores” in this cell layer and at the site of the pore the prolactin cells bear unusual specializations consisting of one cilium, several tall microvilli, and a mass of granular material. Prolactin release takes place at the basal pole of the cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00226026
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  • 6
    Electronic Resource
    Electronic Resource
    The skin of Amphioxus (1961)
    Springer
    Cell & tissue research 54 (1961), S. 90-104 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The skin of the lancelet, Amphioxus lanceolatus, was investigated with the aid of the electron microscope and some histochemical techniques. It was shown that the single type of epidermal cells is capable of performing several activities. These cells produce and attach a thin mucous surface layer and it is also suggested that a primitive form of keratinization occurs in them. Furthermore they may produce pigment granules and serve as glycogen stores. A thin lamina below the epidermal cells cements their basal surfaces and is itself basally anchored in the underlying corium with the aid of an elaborate system of processes. The corium fibre layer in most cases rests upon a single fibrocyte layer. It is at irregular intervals penetrated by bundles of fibres which originate as branches of the corium collagen fibres.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00384200
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  • 7
    Electronic Resource
    Electronic Resource
    An experimental breakage ofReissner's fibre in the central canal of the pike (Esox lucius) (1957)
    Springer
    Cell & tissue research 46 (1957), S. 12-17 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The spinal cords of newly hatched pike (Esox lucius) fry were divided into two pieces by transverse cuts. After periods of different lengths, the appearances of the brokenReissner's fibres were investigated anatomically. The fibre normally terminates in the caudal end as a secretory accumulation, a caudal mass. After the operation this mass gradually disappears, apparently through the spinal cord wall cells. The new termination of the broken fibre, in front of the scar, forms a new caudal mass. This fact indicates thatReissner's fibre is a secretory transport mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01106143
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  • 8
    Electronic Resource
    Electronic Resource
    The neurosecretory hypothalamus system and the adenohypophysis of Myxine (1959)
    Springer
    Cell & tissue research 51 (1959), S. 97-107 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00345082
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  • 9
    Electronic Resource
    Electronic Resource
    The fine structure of the subcommissural cells and of Reissner's fibre in Myxine (1957)
    Springer
    Cell & tissue research 46 (1957), S. 672-685 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Reissner's fibre and the subcommisssural cells mainly from Myxine were investigated by light and electron microscope methods. The subcommissural cells carry several cilia and produce a chrome haematoxyphile secretion in the form of granules. It is probable that the nucleus as well as the mitochondria are involved in the synthesis of this material. The secretory release suggests an apocrine type in which the granules swell and form a fine-granulated, chrome haematoxyphile substance in the ventricle. Caudally in the subcommissural canal this material condenses to form Reissner's fibre, which in electron micrographs, except for a fine-granulated ground substance, does not show any structures, a limiting membrane or traces of cell organelles or remnants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00339371
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  • 10
    Electronic Resource
    Electronic Resource
    The praeoptico-hypophysial system, Nucleus tuberis lateralis and the subcommissural organ of Gasterosteus aculeatus after changes in osmotic stimuli (1959)
    Springer
    Cell & tissue research 49 (1959), S. 531-540 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The histology and cytology of the praeoptico-hypophysial system, nucleus tuberis lateralis and subcommissural organ in Gasterosteus aculeatus were analyzed after the fishes had been put in waters of different salinity (see Tables 1–4). These three structures are all identical in fishes which are accustomed to fresh water and to 32‰ salt-water. A transference to hypertonic water causes changes in the neurosecretory system which suggest the existence of an antidiuretic principle in the neurosecretory substance. No such relationship is found when the fishes are put into hypotonic water. Further, no connection is found between either the secretion production in nucleus tuberis lateralis or in the subcommissural organ and variations in osmotic value.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00338863
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