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  • 1
    Unknown
    San Diego : Academic Press
    Call number: 05-BIO-50:22 ; 04-DIFF:91a ; 04-DIFF:91b
    Keywords: Mice ; Developmental Biology ; Fetal Development ; Fetal Organ Maturity ; Mice / anatomy & histology ; Embryology ; Mice / Anatomy ; Mice / Development ; Embryology / Mammals
    Pages: xii, 291 p. : ill.
    ISBN: 0124020607
    Signatur Availability
    05-BIO-50:22 departmental collection or stack – please contact the library
    04-DIFF:91a departmental collection or stack – please contact the library
    04-DIFF:91b departmental collection or stack – please contact the library
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  • 2
    Unknown
    St. Louis : Mosby-Year Book
    Call number: 05-BIO-50:17
    Keywords: Developmental Biology ; Embryology
    Notes: Includes index.
    Pages: 224 p. : numerous ill.
    ISBN: 0-7234-1740-7
    Signatur Availability
    05-BIO-50:17 departmental collection or stack – please contact the library
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Development genes and evolution 197 (1988), S. 513-517 
    ISSN: 1432-041X
    Keywords: Cell adhesion ; Condensation ; Mechanism ; Somitogenesis ; Traction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary This paper suggests that chick somites form because presomitic cells exert tractional forces on one another. These forces derive from the increase in cell adhesion and density that occurs as N-CAM and N-cadherin are laid down by the motile cells of the presomitic mesoderm, well before the somites form. Harris et al. (1984) have shown that adhesive and motile cells in an appropriate environment in vitro can spontaneously form aggregates under the influence of the tractional forces that they exert. Presomitic mesodermal cells may behave similarly: as CAM production increases local adhesivity, the tractional forces between the cells should become sufficiently strong for groups of cells to segment off the mesenchyme as somites. The successive expression of CAMs down the presomitic mesoderm will thus lead to the formation of an anterior-posterior sequence of somites. This mechanism can explain several aspects of somitogenesis that models generating a repetitive pre-pattern through gating cohorts of cells find hard to explain: first, mesodermal segregation occurs among highly adherent cells; second, that multiple rows of somites can form in embryos cultured on highly adherent substrata; third, that stirred mesoderm will still form normal somites; and, fourth, how somite size can be altered in heat-shocked embryos and elsewhere. Suggestions are given as to how the mechanism may be tested and where else in the embryo it could apply.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 219 (1968), S. 1279-1280 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Collagen fibrils precipitated in citrate-phosphate buffer: (a) at pH 4.5, positively contrasted with PTA (x 110,000) J.1455; (b) at pH 4.5, negatively contrasted with PTA (x 110,000) J.1479, showing two planes of mirror symmetry per period; (c) at pH 7.0, positively contrasted with PTA (x ...
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    BioEssays 12 (1990), S. 389-395 
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Although the segregation of mesenchyme into distinct aggregates is the first step in the development of a range of tissues that includes bones, somites, feathers and nephrons, we still know very little about the mechanisms by which this happens. There are two obvious types of explanation: first, that there are global pre-patterns within the mesenchyme whose molecular expression leads to tissue fragmentation and, second, that the condensations arise spontaneously through the local morphogenetic abilities of the cells. The only known mechanism for the latter possibility is cell traction and this paper suggests that current studies are compatible with traction playing a primary role in the formation of nephrogenic condensations in the developing kidney and the separation of somites, but not for the generation of feather rudiments where there is evidence of a prepattern of adhesivity.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    BioEssays 18 (1996), S. 1-2 
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 0265-9247
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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