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  • 1
    Electronic Resource
    Electronic Resource
    Limits of Transplantation Tolerance in Large Amoebae. I. Microfusion Studies Using Amoeba proteus, Pelomyxa illinoisensis, and Three Strains of Pelomyxa carolinensis (1962)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 9 (1962), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. Protoplasm transferred to a multinucleated amoeba is well tolerated if the donor and recipient portions are from the same amoeba, from different amoebae of a single clone, from different amoebae of the same species found in a given location, or from different amoebae of the same species found in widely separated geographic areas. On the other hand, protoplasm is not tolerated and death invariably follows interspecific or intergeneric microtransfers between any two of the three species of amoebae used in this study.Attempts to overcome the tolerance block in heterologous transfers by the use of x-radiation failed although a significant extension of the mean survival time was obtained. The latter can also be interpreted as a limited therapeutic effect of nonirradiated, heterologous donor protoplasm on supralethally irradiated recipients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1962.tb02603.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    An Electron Microscope Study of the Spore of a Microsporidian, Thelohania californica (1963)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 10 (1963), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. An electron microscope study has been made of the spores of a microsporidian, Thelohania californica, parasitic in Culex tarsalis. Fresh spores measure 7–9 × 5–6 μ and contain a polar filament which when extruded may reach a length of 150 μ or more. Thus, this is a typical microsporidian spore. The spore is enveloped in a resistant outer membrane. The polar filament is attached to this membrane at the narrow anterior end, runs inward for a distance and is coiled spirally close to the inner surface of the outer membrane. There are 12–14 spiral turns in the majority of the spores. In the anterior five turns the filament is distinctly larger in diameter than in the seven or more posterior coils. The polar filament appears to be tubular, but the lumen is filled partially or completely with material of high electron density. A laminated polaroplast surrounds the basal portion of the filament and extends into the middle and posterior regions of the intrasporal cavity. The sporoplasm is uninucleate and lies in close contact with the polar filament and the polaroplast. There is no polar capsule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1963.tb01645.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Pelomyxa palustris Greeff (1966)
    Springer
    Cell & tissue research 73 (1966), S. 367-383 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The Pelomyxa palustris amoebae used in this study were multinucleate, herbivorous protozoans. All nuclei within a single organism were similar, but several types of nuclei were seen in different amoeba. These nuclei might represent various stages of mitosis although metaphase and anaphase stages were never seen. Rod-shaped bacteria within vesicles characteristically surrounded the nuclei. Bacterial rods of this as well as another type also occurred within vesicles in the cytoplasm. The nuclear envelope contained annuli and it was covered externally by minute vesicles. Nucleoli and micronucleoli were most frequently located along the inner surface of the nuclear envelope. Clusters of electron-opaque spheroids were found within the nucleoli; sometimes, they existed free in the nucleoplasm. Intranuclear globules of lipidlike material were often seen. Mitochondria, Golgi bodies, contactile vacuoles, and crystal vacuoles were definitely absent in P. palustris. The cytoplasm contained many food vacuoles and clear vacuoles of various sizes. Vacuole-like aggregations, probably containing glycogen, were present.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00329017
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    Paper (German National Licenses)
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