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  • 1
    Digitale Medien
    Digitale Medien
    Dehydroxylation of Caffeic Acid by a Bacterium isolated from Rat Faeces (1966)
    [s.l.] : Nature Publishing Group
    Nature 212 (1966), S. 303-304 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] We are unaware of any work showing dehydroxylation of caffeic acid by pure cultures of micro-organisms. We have isolated a strain of Pseudomonas sp. from rat faeces which has the ability to dehydroxylate caffeic acid yielding both m-hydroxy-phenyl-propionic and m-cournaric acids, as well as some ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/212303b0
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  • 2
    Digitale Medien
    Digitale Medien
    Effects of UV-Radiation on Kinetics of Encystment and on Morphology of Resting Cysts of the Ciliate Laurentiella acuminata (1983)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 30 (1983), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The effects of ultraviolet radiation (λ= 254 nm) on the kinetics of encystment of the hypotrichous ciliate Laurentiella acuminata and the structure of resting cysts obtained from irradiated precystic cells are reported. High doses of UV-radiation caused a delay of encystment with a linear increase in the average time for obtaining 50% of encystment (EN50). Resting cysts with abnormal cyst walls were obtained when precystic cells were irradiated in the exposure range 720 to 960 J/m2. The cystic layer (mesocyst) was approximately twice as thick (6.5 μ m) as normal (3.7 μ m). Microscopical observations of abnormal cysts revealed the presence of two complete mesocysts, and the absence of the spines characteristic of the ectocyst. The UV-dependent effects on the cyst wall were gradually corrected in successive generations of the irradiated cells.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1983.tb05350.x
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  • 3
    Digitale Medien
    Digitale Medien
    Induced Autogamy in 2 Species of Stylonychia (1970)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 17 (1970), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: SYNOPSIS By using the split-pair method autogamy was induced in Stylonychia mytilus Ehrenberg and S. muscorum Kahl, and the process was thoroly studied in the former. The pairs split early in conjugation continued the process as autogamonts and never united again altho they were placed in the same depression slide.The pattern of nuclear behavior during autogamy closely resembles that reported for conjugation. The fusion of pronuclei at metaphase is usually observed, but it occasionally fails and the stationary pronucleus appears to continue its development as a hemicaryon. The macronuclear anlage and the definitive micronuclei differentiate from particular products of the 3rd postgamic division.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1970.tb04698.x
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  • 4
    Digitale Medien
    Digitale Medien
    Structure of Cyst Wall Precursors and Kinetics of Their Appearance During the Encystment of Laurentiella acuminata (Hypotrichida, Oxytrichidae) (1983)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 30 (1983), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The encystment of Laurenliella acuminata was divided into five stages: stage A (precystic semitransparent cell with dark-globules), stage B (precystic transparent cell), stage C (precystic pigmented cell), stage D (spherical shape without cyst wall) and stage E (young resting cyst), on the basis of observations of changes in morphology and pigmentation during encystment. The duration of these stages was also established. Observations by electron microscopy confirmed that the cyst wall, composed of four layers, is derived from different kinds of precursors which are synthesized “de novo.” The ectocyst precursors are composed of stacks of between 5 and 12 small thin plates or discs; these stacks are about 0.9 μm in length and 0.06 μm in height. The mesocyst precursors are fibrillar bodies of variable shapes, about 2.4 μm in maximum length and 0.12–0.16 μm in diameter. These precursors appear in the cytoplasm of the precystic cell during the first precystic stage (stage A). The endocyst precursors are rounded bodies surrounded by a fine membrane, and their contents appeared similar to the endocyst. The granular layer precursors are spherical bodies about 0.1–0.2 μm in diameter, surrounded by a double membrane presenting ribosomes adhering to its outer membrane. Both endocyst and granular layer precursors are observed in the precystic cytoplasm from stage B. On the basis of ultrastructural studies, a formation and growth model of the cyst wall of the hypotrichous ciliate Laurentiella acuminata is proposed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1983.tb02908.x
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  • 5
    Digitale Medien
    Digitale Medien
    Conjugation in Stylonychia muscorum Kahl (1965)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 12 (1965), S. 0 
    Details
    ISSN: 1550-7408
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: SYNOPSIS. The process of conjugation in a strain of Stylonychia muscorum Kahl is described. It follows the general pattern reported earlier in other Oxytrichidae, but the following peculiarities can be noted: 1) mating never occurs between individuals possessing only two micronuclei, 2)exchange of small macronuclear lobes can be occasionally observed, and 3) the reorganization of the exconjugants involves the quick, successive passage of a series of reorganization bands.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1550-7408.1965.tb01847.x
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  • 6
    Digitale Medien
    Digitale Medien
    Ultrastructure of the macronuclear anlage in Stylonychia mytilus
    Amsterdam : Elsevier
    Experimental Cell Research 72 (1972), S. 509-518 
    Details
    ISSN: 0014-4827
    Quelle: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Thema: Biologie , Medizin
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1016/0014-4827(72)90021-3
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