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  • 1995-1999  (4)
  • Chemistry  (2)
  • Craniometry  (2)
  • pharmacokinetics
  • 1
    ISSN: 1279-8517
    Keywords: Skull ; Craniometry ; Anthropology ; 3-D image ; Helical CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To make a digital image database of human craniology, we optimized the three-dimensional (3-D) images of 29 dried human skull specimens by helical computed tomography (CT). For the verification of the quantitative exactitude of these image data, we manually measured nine items of direct distances between standard anthropologic points on each skull and the corresponding distances projected on the CT monitor by specifying the respective points. The results obtained by the two methods of manual and CT measurements were compared and statistically analyzed. The CT measurements were so exact that the lower limit of correlation coefficients (95% of the confidence interval) between the two results was more than 0.8 in six items; i.e., maximal cranial length and breadth, minimal frontal breadth, bizygomatic breadth, distance between ectomolares and nasion-basion length. In contrast, the CT results were less well correlated with the manual measurements of three items; i.e., distance between bilateral mastoidales, total facial height, and nasal breadth. We concluded that the qualitative representation of 3-D CT images was adequate, although some quantitative data may be incorrect. The inaccuracy is suspected to be due to the difficulty in specifying the standard points on the CT images, and due to the differences in measurement procedures between the direct and projected distances.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1279-8517
    Keywords: Skull ; Craniometry ; Anthropology ; 3-D image ; Helical CT
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé Afin d'établir une banque informatisée de données en crâniologie humaine, nous avons recueilli les images tridimensionnelles, de 29 crânes secs, obtenues par scanner hélicoïdal. Pour vérifier les données obtenues, nous avons mesuré manuellement 9 longueurs situées entre les repères crâniologiques classiques sur chaque crâne et les distances correspondantes entre les points analogues sur la console du scanner. Les résultats obtenus par les 2 méthodes de mesure manuelle et par scanner sont comparés et analysés statistiquement. Les mesures scanner sont situées à la limite inférieure de corrélation entre les 2 résultats (95% d'intervalle de confiance) et supérieures à 0.8 dans 6 mesures : la longueur et la largeur maximales crâniennes, la largeur minimale frontale, la largeur bizygomatique, la distance entre les faces externes des molaires et la longueur nasion-basion. Par contre, les mesures scanner sont moins concordantes avec les résultats manuels dans 3 mesures : distance intermastoïdienne, hauteur faciale totale et largeur nasale. Nous en concluons que la représentation qualitative des images scanner est correcte, même si quelques données chiffrées sont imprécises. Les causes d'erreurs sont, semble t-il, dues à la difficulté de repérer les points crâniologiques précis sur les images scanner, ainsi qu'à la différence des techniques de mesure entre une donnée directe et une en projection.
    Notes: Summary To make a digital image database of human craniology, we optimized the three-dimensional (3-D) images of 29 dried human skull specimens by helical computed tomography (CT). For the verification of the quantitative exactitude of these image data, we manually measured nine items of direct distances between standard anthropologic points on each skull and the corresponding distances projected on the CT monitor by specifying the respective points. The results obtained by the two methods of manual and CT measurements were compared and statistically analyzed. The CT measurements were so exact that the lower limit of correlation coefficients (95% of the confidence interval) between the two results was more than 0.8 in six items; i.e., maximal cranial length and breadth, minimal frontal breadth, bizygomatic breadth, distance between ectomolares and nasion-basion length. In contrast, the CT results were less well correlated with the manual measurements of three items; i.e., distance between bilateral mastoidales, total facial height, and nasal breadth. We concluded that the qualitative representation of 3-D CT images was adequate, although some quantitative data may be incorrect. The inaccuracy is suspected to be due to the difficulty in specifying the standard points on the CT images, and due to the differences in measurement procedures between the direct and projected distances.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 61 (1996), S. 1413-1421 
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Creep recovery of acrylate urethane/acrylate networks was investigated as a function of time and temperature. An important outcome was the capacity for superimposition of experimental data obtained at various temperatures. Arrhenius type temperature dependence of the creep recovery was also observed. The master curve obtained did not significantly depend on the measuring mode of creep recovery or the crosslink density, and the response could be approximated by the Bueche theory. The dynamic mechanical properties of the systems were also investigated. Retardation spectrum L obtained from the dynamic mechanical data overlapped with that obtained from the creep recovery data. The activation energy obtained from the temperature dependence of the shift factor aT also agreed with that obtained from the temperature dependence of the creep recovery. © 1996 John Wiley & Sons, Inc.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Biopolymers 47 (1998), S. 185-193 
    ISSN: 0006-3525
    Keywords: surface modification ; template approach ; self-assembly ; protein monolayer ; molecular imprinting ; implant material ; protein adsorption - X-ray photoelectron spectroscopy ; surface pattern - biocompatibility of, cyclic peptide for, porphyrin for ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Protein layers are deposited on the surface of implanted biomaterials. Better understanding of the interaction between the surface protein layers and the biological system would lead to the development of future biomaterials with superior biocompatibilities. Well-organized biorecognizable surfaces can be formed with various template molecules that provide an appropriate spacing for the attachment of recognition groups to the modified surface. Silane coupling reagents, porphyrin thiols, and cyclic peptides are being used as templates to introduce nano-scale patterns on solid surfaces. Synthesis of these templates and characterization of the modified surface are described. © 1998 John Wiley & Sons, Inc. Biopoly 47: 185-193, 1998
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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