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  • 1990-1994  (2)
  • 1993  (2)
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  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    An Additional Bone in the Carpal Region of Raptorial Birds (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Anatomia, histologia, embryologia 22 (1993), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In a series of 4 species of owls and 12 species of diurnal raptors, an additional bone was present bilaterally in the area of the carpus. Designating the bone as an “additional bone of the raptorial carpal region” is suggested pending appropriate embryological studies to determine the origin of the bone. Generally, the bone was present in owls and in diurnal raptors with relatively short, rounded wings, but was absent in species with longer, more tapered wings. The bone lies at the cranial edge of the carpal area near the radial carpal bone, and is fixed to the surrounding skeleton by ligaments. The tendon of the tensor patagium longus muscle has one slip that attaches to the additional bone and another that passes over its craniodorsal surface en route to insertion. Awareness of the occurrence of this bone in some raptors, but not others, is essential in clinical evaluation of wing injuries, as well as in forming a prognosis for the return to soundness, the potential for release, and, therefore, the life of an injured raptor.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0264.1993.tb00348.x
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrastructure and microanalyses of the calcareous corpuscles of the protoscoleces ofEchinococcus granulosus (1993)
    Springer
    Parasitology research 79 (1993), S. 245-250 
    Details
    ISSN: 1432-1955
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract The calcareous corpuscles of the protoscolex stage ofEchinococcus granulosus are irregularly spherical or ovoid in shape and have a diameter ranging between 2 and 16 μm. The central region of immature corpuscles is composed of an electron-lucent matrix containing granular deposits and, in more mature corpuscles, paired membrane lamellae. Energy-dispersive X-ray microanalysis of sectioned immature corpuscles demonstrated calcium, magnesium and phosphorus, whilst a quantitative analysis indicated the presence of calcium and magnesium at 142.7 and 41.3 mg/g dry weight, respectively, and inorganic phosphate at 18.0 mg/g. Assuming that the anion is predominantly carbonate, the molar ratio of Ca:Mg:HPO 4 2− :CO 3 2− is 1:0.48:0.08:1.41. X-ray diffraction patterns obtained from preparations of whole corpuscles indicated a poorly crystalline material including the mineral calcite. X-ray absorption near-edge spectra of corpuscles, taken over the phosphorus K edge, resembled those of brushite (CaHPO4·2H2O) and suggest that the phosphate, within the corpuscles, is present in an amorphous, hydrated from that could be readily solubilised and mobilised for the metabolic processes of the organism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931900
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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