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  • Methoxy-substituted aromatic compounds  (1)
  • Tenascin  (1)
  • 1990-1994  (2)
  • 1990  (2)
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Keywords
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  • 1990-1994  (2)
Year
  • 1990  (2)
  • 1
    Electronic Resource
    Electronic Resource
    Histogenesis of the semilunar valves: an immunohistochemical analysis of tenascin and type-I collagen distribution in developing chick heart valves (1990)
    Springer
    Cell & tissue research 259 (1990), S. 299-304 
    Details
    ISSN: 1432-0878
    Keywords: Semilunar valves ; Extracellular matrix ; Tenascin ; Type-I collagen ; Heart morphogenesis ; Domestic fowl
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The development of the semilunar valves takes place in association with septation of the outflow tract in the embryonic heart. Although numerous studies have focused on this process, the causal mechanisms of valvular development remain obscure. This paper reports an immunohistochemical analysis of tenascin and type-I collagen distribution in developing chick heart valves. Tenascin is a glycoprotein that is present on some embryonic extracellular matrices. It plays several significant roles in tissue differentiation, cell growth, and tissue interactions; it is also important for the formation of specific zones of connective tissue that fulfill mechanical functions. Our results show that tenascin is present during valvular morphogenesis and histogenesis, and that its distribution is associated with zones specialized in bearing mechanical loads.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00318452
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  • 2
    Electronic Resource
    Electronic Resource
    Dependence of 13C NMR methoxy substituent chemical shift values on π-bond orders of fused aromatic compounds (1990)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 28 (1990), S. 311-314 
    Details
    ISSN: 0749-1581
    Keywords: 13C NMR ; Substituent chemical shift values ; π bond orders ; Methoxy-substituted aromatic compounds ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The substituent chemical shift values induced by the methoxy group at the two ortho positions of aromatic compounds which include naphthalenes, quinolines, indoles, coumarins, flavones and benzofurans were linearly correlated with π-bond orders, affording the equation Δδortho(13C) = -98.68Pπ + 50.38 (correlation coefficient = 0.929; root mean square error = 1.95 ppm) when 40 pairs of values are considered. Elimination of six points corresponding to ring-junction quaternary carbons improves the correlation coefficient to 0.961 (root mean square error = 1.4 ppm) for the equation Δδortho(13C) = -126.85Pπ + 69.66.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260280406
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