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  • Ultrastructure  (3)
  • Eye  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    The ultrastructure and calcification of the scales of Tilapia mossambica (Peters) (1976)
    Springer
    Cell & tissue research 167 (1976), S. 37-47 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Scale ; Tilapia ; Calcification ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The scales of Tilapia are surrounded by an envelope of scleroblasts responsible for the production of layers of collagen that constitute the bulk of the scale. The scleroblasts adjoining the lateral face of the oldest scale region gradually atrophy. New collagen layers are deposited against the inner face of the scale, the adjoining scleroblasts showing evidence of high metabolic activity. Calcification occurs by inotropic deposition of crystals alongside the fibres. There is no sharp demarcation between calcified and non-calcified scale regions, a calcification front gradually moving towards newly formed collagen layers. It is felt that fish scales should be considered as calcified derivatives of dermal collagen layers.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00220158
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The ultrastructure of the skin of Tilapia mossambica (Peters) (1974)
    Springer
    Cell & tissue research 154 (1974), S. 251-264 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Skin ; Tilapia ; Ultrastructure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The fine structure of the skin of Tilapia mossambica (Peters) is described. In certain areas the epidermal surface forms so-called Epidermal Surface Patterns. Two types of epidermal cells are distinguished and their differences noted. The epidermal surface is covered by a layer of acid mucopolysaccharide, yet the contents of the mucus cells did not react with ruthenium red. The dermis consists mainly of bundles of collagen fibres and associated fibroblasts, but melanophores, iridophores and complex melano-iridophores are also present. Aspects of the development and structure of the guanine platelets and the melanosomes are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00223167
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  • 3
    Digitale Medien
    Digitale Medien
    The ultrastructure of the eye of the mosquitofishGambusia affinis (1982)
    Springer
    Cell & tissue research 223 (1982), S. 431-443 
    Details
    ISSN: 1432-0878
    Schlagwort(e): Eye ; Ultrastructure ; Gambusia affinis
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The ultrastructure of the tissue components of the eye ofGambusia affinis, excluding the sensory cells, is described. The cornea consists of two different sections of collagenous layers of different density. The choroid includes an argentea composed ofα- andβ-melanophores, lipopterinophores and a choriocapillaris associated with the rete mirabile of the choroid body. Bruch's membrane, underlying the retinal pigment layer, can develop complex associations with fibroblasts delimiting the choriocapillaris. The outer section (stroma) of the iris includes several cell types that are not found in the inner or vitread section. In adultGambusia the lens capsule is well developed, but in twoweek-oldSarotherodon larvae the lens epithelium is covered only by a glycocalyx.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01258500
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