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Zhu, Q. (author), de With, G. (author), Dortmans, L.J.M.G. (author), Feenstra, F. (author), TNO Industrie (author)Near net-shape fabrication of hydroxyapatite (HA) glass composites has been attempted by infiltrating a glass into porous HA performs. Main efforts were put to develop glasses that are chemically compatible with HA at elevated temperatures. After extensive investigations in the phosphate and borosilicate systems, glasses of (50-55)SiO2-(20-25...article 2004
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Zhu, Q. (author), de With, G. (author), Dortmans, L.J.M.G. (author), Feenstra, F. (author)The purpose of this study is to investigate the subcritical crack growth (SCG) behavior of alumina-glass dental composites. Alumina-glass composites were fabricated by infiltrating molten glass to porous alumina preforms. Rectangular bars of the composite were subject to dynamic loading in air, with stressing rates ranging from 0.01 MPa/s to 2...article 2003
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Gerritsen, M. (author), Jansen, J.A. (author), Kros, A. (author), Vriezema, D.M. (author), Sommerdijk, N.A.J.M. (author), Nolte, R.J.M. (author), Lutterman, J.A. (author), van Hövell, S.W.F.M. (author), van der Gaag, A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)The objective of this investigation was to evaluate the influence of polymorphonuclear granulocytes on the performance of uncoated and cellulose acetate/Nafion® coated amperometric glucose sensors in vitro. The response of these sensors was also investigated in serum. Uncoated and coated sensors showed lower sensitivities to glucose, with a...article 2001
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Reichl, F.X. (author), Walther, U.I. (author), Durner, J. (author), Kehe, K. (author), Hickel, R. (author), Kunzelmann, K.H. (author), Spahl, W. (author), Hume, W.R. (author), Benschop, H.P. (author), Forth, W. (author)Objective: The effect of dental composite components triethyleneglycoldimethacrylate (TEGDMA) and hydroxyethylmethacrylate (HEMA), as well as mercuric chloride (HgCl2) and methylmercury chloride (MeHgCl) was investigated on the release of lactatedehydrogenase (LDH) from alveolar epithelial lung cell lines in vitro. Methods: The confluent cell...article 2001
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Teirlinck, C.J.P.M. (author), Bezemer, R.A. (author), Kollmann, C. (author), Lubbers, J. (author), Hoskins, P.R. (author), Fish, P. (author), Fredfeldt, K.-E. (author), Schaarschmidt, U.G. (author), TNO Preventie en Gezondheid (author)Doppler test objects are used to characterise Doppler systems, both stand-alone systems and the Doppler part of so-called duplex scanners. The aim of the project partially presented here is the development and validation of an example of a Doppler test object fulfilling the requirements of the IEC 1685. The project has been carried out by nine...article 1998