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  • 1
    Electronic Resource
    Electronic Resource
    Dynamic Mechanical Behavior of Polystyrene-(Ethene-co-butene)-Polystyrene, Triblock Copolymer Films Cast from Various Solvents (1979)
    s.l. : American Chemical Society
    Macromolecules 12 (1979), S. 52-56 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma60067a011
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Quantification of dental plaque on lingual tooth surfaces using image analysis: reliability and validation (2004)
    Oxford, UK : Munksgaard International Publishers
    Journal of clinical periodontology 31 (2004), S. 0 
    Details
    ISSN: 1600-051X
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Aim: The aim of this study was to increase the versatility and further validate the method reported by Smith et al. (2001) by testing the reliability of plaque measurement against two well-known dental plaque quantification methodologies using image analysis in a clinical trial.Method: The teeth of 40 subjects were disclosed before digital images of the labial and lingual surfaces of their upper and lower incisors were acquired. The amount of plaque present was quantified using a modification of the method described by Smith et al. (2001). The method was modified for obtaining images of the lingual surfaces by incorporating the use of orthodontic occlusal mirrors and 5-mm pieces of moistened blue articulating paper used to enable calibration. Plaque measurements were made from 320 upper and lower anterior teeth from the 40 subjects by two operators. Fliess' coefficient of reliability was used to assess intra- and inter-operator reliability and the independent sample t test was used to assess statistical significance between test and control groups after checking the data for normality. For validation, measurements were recorded using the Turesky et al. (1970) (modification of the Quigley & Hein (1962) plaque index and the Addy et al. (1983) plaque area index. The results were compared with the image analysis method using Pearson's correlation coefficient.Results: The results for reliability were within Fliess' range of “excellent” for both intra-operator repeatability and inter-operator reproducibility. Pearson's correlation coefficients showed highly significant values indicating the close similarity between all three methods.Conclusions: This method for the measurement of dental plaque on lingual surfaces of anterior teeth proved reliable. The combined results from the labial and lingual surfaces of anterior teeth using image analysis produced trial conclusions comparable with the alternate plaque quantification methods used, with less clinician time and further producing a permanent database of images for future use.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1600-051X.2004.00523.x
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  • 3
    Electronic Resource
    Electronic Resource
    The measurement of tooth whiteness by image analysis and spectrophotometry: a comparison (2005)
    Oxford, UK : Blackwell Science Ltd
    Journal of oral rehabilitation 32 (2005), S. 0 
    Details
    ISSN: 1365-2842
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: summary  Digital image capturing and analysis techniques have been used to measure the colour of teeth and to compare with spectrophotometric results and visual observations. A non-linear image analysis approach was developed and, for the colour range of human teeth, allows device-dependant digital camera colour data to be quantitatively transformed to Commission Internationale de l’Éclairage (CIE) colorimetric values. With reference to a CIE standard illuminant, two different lighting arrays have been used. For flat and non-translucent white and yellow surfaces, spectrophotometric results showed that this transformation achieves required accuracy. It was found, in all of the present studies, which included measurements on the VITA Lumin® Vacuum shade guide and extracted teeth, that spectrophotometry invariably underestimated values of the CIE whiteness index. However, the results from these two types of measurement correlated well. There was also a reasonably good correlation between earlier data obtained by visual assessment and the present data by the two instrumental methods. For extracted teeth, both instrumental methods used in this work did not confirm a whitening effect for 2-min brushing with toothpaste, but did show significant whitening results for bleaching with 15% hydrogen peroxide.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2842.2004.01340.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Unperturbed dimensions of poly(cyclohexyl methacrylate) and their temperature coefficient (1986)
    Springer
    Polymer bulletin 16 (1986), S. 453-456 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Unperturbed dimensions of poly(cyclohexyl methacrylate) and their temperature coefficient were studied. The influence of the character of solvent on the solubility of poly(cyclohexyl methacrylate) are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955578
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  • 5
    Electronic Resource
    Electronic Resource
    The behaviour of poly(2-ethylhexyl acrylate) in dilute solution: viscosity measurements (1993)
    Springer
    Polymer bulletin 30 (1993), S. 713-718 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Linear macromolecules of the poly(2-ethylhexyl acrylate) were prepared by solution polymerization in toluene at 12 °C, using azobisisobutyronitrile as initiator. The polymer was fractionated and the fractions characterized by the methods of light scattering, osmometry and viscometry. Mark-Houwink-Sakurada relations at 25°C in solvents of different thermodynamical quality have been determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300041
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    The miscibility and phase separation in binary blends of poly(ethyl methacrylate) with styrene/acrylonitrile copolymers (1992)
    Springer
    Polymer bulletin 28 (1992), S. 361-366 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary The miscibility and lower critical solution behaviour of pol(ethyl methacrylate) with poly(styrene-stat-acrylonitrile) have been studied. Poly(ethyl methacrylate) is miscible with styrene/acrylonitrile copolymers having acrylonitrile concents between 9 and 34 wt %. By increasing the size of the pendant group from methyl to ethyl, the repulsive interaction between the methacrylate and acrylonitrile increases, but that between the methacrylate and styrene decreases.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00294836
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular relaxations in the glassy state of polymers with unsaturated backbone chains and their hydrogenated derivatives (1979)
    Springer
    Polymer bulletin 1 (1979), S. 833-843 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary A study of the dynamic mechanical behaviour of poly(propene-alt-1, 4-butadiene), poly(styrene-b-isoprene) SIS triblock, and their hydrogenated derivatives has been carried out using torsional braid and rheovibron techniques. It was found that the existence of low temperature damping processes (120–160K/1Hz) depends on the molecular structure, particularly on the geometric isomerism of the double bond. Simple ring analogues have been used as models to elucidate the molecular mechanisms underlying these relaxation processes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283216
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Temperature coefficient of the unperturbed dimensions of poly(n-butyl methacrylate) (1977)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Letters Edition 15 (1977), S. 555-558 
    Details
    ISSN: 0360-6384
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1977.130150908
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    Paper (German National Licenses)
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