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  • 1
    Book
    Book
    Heidelberg : : Spektrum Akademischer Verlag,
    Call number: A110:018 ; A110:020 ; A190:002 ; A230:001 ; A991:022 ; G300:001
    Type of Medium: Book
    Pages: 551 p. : , ill.
    Edition: 18. Aufl. / Maria Mulisch, Ulrich Welsch (Hrsg.)
    ISBN: 978-3-8274-1676-6
    Language: German
    Location: DKFZ
    Location: DKFZ
    Location: DKFZ
    Location: DKFZ
    Location: DKFZ
    Location: DKFZ
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  • 2
    Book
    Book
    Heidelberg : : Spektrum Akademischer Verlag,
    Call number: QC451:012(19)
    Type of Medium: Book
    Pages: xviii, 603 p. : , ill.
    Edition: 19. Aufl. / Maria Mulisch, Ulrich Welsch (Hrsg.)
    ISBN: 9783642551895
    Language: German
    Location: DKFZ
    Branch Library: DKFZ
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Protoplasma 143 (1988), S. 170-175 
    ISSN: 1615-6102
    Keywords: Ciliate ; Stentor ; Nuclei ; Fenestrated cisterna
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Different fixation techniques were employed to obtain satisfactory fixation of the endoplasm ofStentor coeruleus for ultrastructural investigations. The nuclei ofS. coeruleus are surrounded by a flattened fenestrated cisterna. The space between the nuclear envelope and the cisterna (= perinuclear space) is continuous with the cytoplasm via channels. The envelopes of both, micronucleus and macronucleus, are connected to the fenestrated cisterna by filamentous material. This organization accounts for the close association between micronucleus and macronucleus inStentor coeruleus. The fenestrated cisterna is compared to similar structures occurring in other organisms, and its possible function is discussed.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: . The structure and ultrastructure of the chitinous lorica of Eufolliculina sp. are described. The lorica is produced from precursor material secreted by the motile swarmer immediately after settling. This material is located in numerous vesicles found in the cortical region of the cells and is secreted by exocytosis. Initially, material is secreted from the ventral part of the cell to produce the attachment plate of the lorica. After this, exocytosis occurs over most of the body surface as the ampulla part of the lorica is constructed. During the later stages of lorica formation, secretion is mainly limited to the anterior of the cell as the neck is formed. The lorica is shaped mainly by the action of the cilia and by the behavior of the cell. While the neck is being formed, the anterior part of the cell is deformed by a local accumulation of cytoplasmic vacuoles. This deformation is employed in shaping the neck. No changes were detected in the organization of the cortical infraciliature during the first stages of lorica formation, but they do occur after the neck has been produced and as the swarmer develops into the sessile form.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-0878
    Keywords: Cilia ; Freeze-fracturing ; Mechanoreceptors ; Intramembranous particle aggregates ; Eufolliculina uhligi (Protozoa) ; Lagotia expansa (Protozoa)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In Eufolliculina uhligi and other folliculinid ciliates, a territory has been identified that differs ultrastructurally from other areas of the cell, and that is especially sensitive to mechanical stimuli. This territory is located around the anterior oral apparatus of the loricate trophont and posterior to the membranellar spiral of the swarmer. Each cilium in this territory is closely apposed to a small membrane-covered pin that is supported by transverse microtubules of the cilium. In front of the pin, the base of the cilium bulges out; the ciliary membrane is interconnected with the axoneme by filamentous material. Freeze-fractured cilia show a large rectangular particle array at the site of the basal swelling. Only scattered particles have been observed in the pin membrane. It is suggested that the cilium and the pin act as a unit, which has therefore been named the ciliumpin-complex. Comparison with ciliary organelles of unicellular and multicellular organisms indicates that, because of their polar organization, the complexes are involved in the transduction of oriented, presumably mechanical, stimuli.
    Type of Medium: Electronic Resource
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