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  • 1
    Electronic Resource
    Electronic Resource
    Microscopic Picture of Reversion of Glycine Spheroplasts into Rods in Escherichia coil (1965)
    [s.l.] : Nature Publishing Group
    Nature 205 (1965), S. 927-928 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Until now -so far as we are aware only Jeynes1 has observed the evolution of spheroplasts prepared under the influence of glycine (α-aminoacetic acid). He described the reproduction of Vibrio cholerae spheroplasts and also mentioned their reversion into cellular forms while decreasing the glycine ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/205927a0
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  • 2
    Electronic Resource
    Electronic Resource
    Morphology of Bacteria treated with Colicin (1962)
    [s.l.] : Nature Publishing Group
    Nature 194 (1962), S. 792-793 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Immediately after the fixation of the colicin ML on sensitive bacteria, the increase of respiration intensity of the culture, synthesis of both nucleic acids and, in accordance with these, also the growth of the culture are inhibited. After 20 min. the respiration begins to slow up and at the same ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/194792a0
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  • 3
    Electronic Resource
    Electronic Resource
    Colicins produced by the Escherichia fergusonii strains closely resemble colicins encoded by Escherichia coli (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 208 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Plasmid DNA of six Escherichia fergusonii colicinogenic strains (three producers of colicin E1, two of Ib and one of Ia) was isolated and the colicin-encoding regions of the corresponding Col plasmids were sequenced. Two new variants of colicin E1, one of colicin Ib, and one of colicin Ia were identified as well as new variants of the colicin E1 and colicin Ib immunity proteins and the colicin E1 lysis polypeptide. The recombinant Escherichia coli producer harboring pColE1 from E. fergusonii strain EF36 (pColE1-EF36) was found to be only partially immune to E1 colicins produced by two other E. fergusonii strains suggesting that pColE1-EF36 may represent an ancestor ColE1 plasmid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11091.x
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  • 4
    Electronic Resource
    Electronic Resource
    II. Fine structure of S-layers (1997)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology reviews 20 (1997), S. 0 
    Details
    ISSN: 1574-6976
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: S-layers are now considered a common cell wall structure in Bacteria and Archaea as well as in some algae. Morphological and chemical studies have revealed that S-layers consist of crystalline arrays of protein or glycoprotein subunits forming oblique, square or hexagonal lattices on the cell surface. Electron microscopy and computer image enhancement techniques have been applied to obtain structural information down to the nanometer range. This chapter deals with the wide distribution of S-layers among cyanobacteria, and their morphological and chemical characterization, and the potential of high resolution electron microscopic studies applied to the cell envelope of Pyrodictium. The occurrence of S-layers in cyanobacteria was investigated by cryomethods and ultrathin sectioning. These investigations indicate that the ultrastructure of S-layers may be exploited as an auxiliary taxonomic criterion in the classification of cyanobacteria. Pyrodictium is the first organism which has shown an optimum growth temperature above 100°C. The highly irregularly shaped, flagellated cells are interconnected by extracellular tubules. The three-dimensional structure of this network was visualized with high resolution scanning electron microscopy while the fine structure of the cell wall architecture was studied in detail with various electron microscopic techniques. Both contributions demonstrate that the investigation of the fine structure of S-layers is fundamental for establishing structure-function relationships for these two-dimensional crystalline arrays.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6976.1997.tb00302.x
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  • 5
    Electronic Resource
    Electronic Resource
    Cell morphology and growth characteristics ofPorphyridium aerugineum (Rhodophyta) (1989)
    Springer
    Plant systematics and evolution 164 (1989), S. 263-272 
    Details
    ISSN: 1615-6110
    Keywords: Algae ; Rhodophyta ; Porphyridiales ; Porphyridium aerugineum ; Cell morphology ; surface structure ; cell size ; growth parameters ; photosynthetic pigments
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Four unialgal strains of the freshwater coccoid red algaPorphyridium aerugineum Geitler were cultivated under laboratory conditions. Cell morphology was studied with the light microscope. The cell surface was examined by means of electron microscopy in order to contribute to the knowledge of polysaccharide sheaths and cytoplasmic membranes. Optimum growth conditions were determined. The range of cell sizes and the average dry masses of single cells were compared in all four strains cultivated at exactly defined temperatures and irradiances. Photosynthetic pigment maxima were measured in intact cells. The red-coloured phycobiliprotein phycoerythrin was not found in any of the examined strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940442
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