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  • Fixtures  (1)
  • Polymer and Materials Science  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    The international journal of advanced manufacturing technology 13 (1997), S. 611-617 
    ISSN: 1433-3015
    Keywords: Fixtures ; Modular ; Reconfigurable ; Thin-walled flexible objects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract This paper presents a novel reconfigurable modular system for the fixturing of thin-walled, flexible objects subject to a discrete number of point forces. The paper comprises two parts: description of the conceptual design of our new reconfigurable fixture, and a brief review of our earlier work on the optimal reconfiguration of the object-support locations. During the mechanical design phase of the fixture, a conscientious effort was made to develop a robust and low-cost system. The primary components of the fixture are: a baseplate, support locators and clamps. A novel tiltable support-surface design, through which the height of the surface can be maintained constant, is used for the locators and the clamps. A fixture reconfiguration method is proposed to place these locators, underneath the object, as an optimal support wall. Potential surface deflections due to external forces are minimised during the optimisation process.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 36 (1997), S. 387-392 
    ISSN: 0021-9304
    Keywords: TiO2 ; albumin ; protein-binding ; hydrogen-ion concentration ; calcium ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Our previous studies have shown that human albumin is one of the main salivary proteins that adsorb to titanium (Ti). The goal of the present study was to investigate the role of electrostatic interactions in the adsorption of human albumin to Ti-oxide (TiO2) in vitro. The binding profile of human albumin to Ti was analyzed according to an adsorption isotherm. Purified human serum albumin (HSA) was suspended with native, calcium-, magnesium-, or potassium-treated commercially pure Ti powders, at pH 3.0 and 7.0. The amount of unadsorbed protein in the supernatant fluid was measured. The maximum amount of adsorbed albumin was 0.13 mg/1.0 g Ti. The albumin-Ti association constant was 2.77 mL/mg. Pretreatment of Ti with calcium, or magnesium alone, or combined with increasing pH values (3.0-7.0) resulted in augmented adsorption of HSA to Ti. No increase in adsorption was observed following pretreatment of Ti with potassium. These results point to the involvement of electrostatic interactions in the adsorption of HSA to TiO2 © 1997 John Wiley & Sons, Inc. J Biomed Mater Res, 36, 387-392, 1997.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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