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  • 1
    Electronic Resource
    Electronic Resource
    Applicability of the Bertrand, Acree, and Burchfield Method of Predicting the Relative Permittivity of Ternary Mixtures (1998)
    Springer
    Journal of solution chemistry 27 (1998), S. 851-856 
    Details
    ISSN: 1572-8927
    Keywords: Relative permittivity ; Bertrand, Acree, Burchfield (BAB) equation ; N,N-dimethyformamide ; 2-methoxyethanol ; 1,2-dimethoxyethane ; nonaqueous ternary solvent mixtures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The Bertrand, Acree, and Burchfield (BAB) method has been employed to predict the relative permittivity of the ternary system: N,N-dimethylformamide-2-methoxyethanol-1,2-dimethoxyethane at seven temperatures from −10 to +20°C using reported relative permittivities for the three constituents' binary systems: N,N-dimethylformamide-2-methoxyethanol, 2-methoxyethanol-1, 2-dimethoxyethane, N,N-dimethylformamide-l, 2-dimethoxyethane. The agreement between the predicted and the experimental values is 99 ± 1%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1022685321653
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  • 2
    Electronic Resource
    Electronic Resource
    Twisted plywood structure of an alternating lamellar pattern in cellular cementum of human teeth (2000)
    Springer
    Anatomy and embryology 202 (2000), S. 25-30 
    Details
    ISSN: 1432-0568
    Keywords: Keywords Cementoblasts ; Collagen fibrils ; Lamellar structure ; Maceration ; Scanning electron microscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Human cellular cementum was examined by scanning electron microscopy to elucidate the manner of the alternate lamellar pattern forming the cellular cementum. Specimens were demineralized, trimmed with a freezing microtome, and treated by NaOH-maceration. This procedure was chosen to avoid artifacts in the fibril arrangement, and to study the fibrous architecture in detail. For comparison, non-demineralized, polished and HCl-etched specimens were also prepared. In the NaOH-macerated specimens, the lamellar pattern of the cellular cementum conformed to the twisted plywood principle of bone lamellation with a periodic rotation of matrix fibrils resulting in an alternating lamellar pattern. In contrast, matrix fibrils were irregularly arranged without indication of rotation of matrix fibrils in the polished and etched specimens. Our results suggest that polishing and etching procedures cause damage to fibrils and fibril arrangement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008241
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    Paper (German National Licenses)
    Fulltext
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