Searched for: subject:"Silicon%5C+Dioxide"
(1 - 14 of 14)
document
Peters, R.J.B. (author), Oomen, A.G. (author), van Bemmel, G. (author), van Vliet, L. (author), Undas, A.K. (author), Munniks, S. (author), Bleys, R.L.A.W. (author), Tromp, P.C. (author), Brand, W. (author), van der Lee, M. (author)
Silicon dioxide (silica, SiO2, SAS) and titanium dioxide (TiO2) are produced in high volumes and applied in many consumer and food products. As a consequence, there is a potential human exposure and subsequent systemic uptake of these particles. In this study we show the characterization and quantification of both total silicon (Si) and titanium...
article 2020
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Fonseca, A.S. (author), Kuijpers, E. (author), Kling, K.I. (author), Levin, M. (author), Koivisto, A.J. (author), Nielsen, S.H. (author), Fransman, W. (author), Fedutik, Y. (author), Jensen, K.A. (author), Koponen, I.K. (author)
Fume hoods are one of the most common types of equipment applied to reduce the potential of particle exposure in laboratory environments. A number of previous studies have shown particle release during work with nanomaterials under fume hoods. Here, we assessed laboratory workers’ inhalation exposure during synthesis and handling of CuO, TiO2...
article 2018
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Bekker, C. (author), Fransman, W. (author), Boessen, R. (author), Oerlemans, A. (author), Ottenbros, I.B. (author), Vermeulen, R. (author)
Background: Nano-specific inhalation exposure models could potentially be effective tools to assess and control worker exposure to nano-objects, and their aggregates and agglomerates (NOAA). However, due to the lack of reliable and consistent collected NOAA exposure data, the scientific basis for validation of the existing NOAA exposure models...
article 2017
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Preller, L. (author), van den Bosch, L.M.C. (author), van den Brandt, P.A. (author), Kauppinen, T. (author), Goldbohm, R.A. (author), TNO Kwaliteit van Leven (author)
Objectives: The lung cancer carcinogenicity of crystalline silica dust remains the subject of discussion. Epidemiological evidence is based on occupational cohort studies and population-based case-control studies. The aim of this study was to assess associations between male lung cancer risk and silica exposure in a population-based cohort study...
article 2010
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Akesso, L. (author), Pettitt, M.E. (author), Callow, J.A. (author), Callow, M.E. (author), Stallard, J. (author), Teer, D. (author), Liu, C. (author), Wang, S. (author), Zhao, Q. (author), D'Souza, F. (author), Willemsen, P.R. (author), Donnelly, G.T. (author), Donik, C. (author), Kocijan, A. (author), Jenko, M. (author), Jones, L.A. (author), Guinaldo, P.C. (author), TNO Industrie en Techniek (author)
SiOx-like coatings were deposited on glass slides from a hexamethylsiloxane precursor by plasma-assisted CVD (PACVD). Surface energies (23.1-45.7 mJ m-1) were correlated with the degree of surface oxidation and hydrocarbon contents. Tapping mode AFM revealed a range of surface topologies with Ra values 1.55-3.16 nm and RMS roughness 1.96-4.11 nm...
article 2009
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Arts, J.H.E. (author), Schijf, M.A. (author), Kuper, C.F. (author), TNO Kwaliteit van Leven (author)
Irritant-induced inflammation of the airways may aggravate respiratory allergy induced by chemical respiratory allergens. Therefore, the effect of airway irritation by synthetic amorphous silica (SAS) on respiratory allergy to trimellitic anhydride (TMA) was studied. Brown Norway (BN) rats were topically sensitized on day 0 and on day 7,...
article 2008
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Prenafeta-Boldú, F.X. (author), Illa, J. (author), van Groenestijn, J.W. (author), Flotats, X. (author), TNO Kwaliteit van Leven (author), KvL (author)
The biodegradation of toluene was studied in two lab-scale air biofilters operated in parallel, packed respectively with perlite granules (PEG) and polyurethane foam cubes (PUC) and inoculated with the same toluene-degrading fungus. Differences on the material pore size, from micrometres in PEG to millimetres in PUC, were responsible for...
article 2008
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Koster, S. (author), Verpoorte, E. (author), TNO Kwaliteit van Leven (author)
This review presents a thorough overview covering the period 1997-2006 of microfluidic chips coupled to mass spectrometry through an electrospray interface. The different types of fabrication processes and materials used to fabricate these chips throughout this period are discussed. Three 'eras' of interfaces are clearly distinguished. The...
article 2007
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Tjoe Nij, E. (author), Heederik, D. (author), TNO Kwaliteit van Leven (author)
Objectives: The aim of this study was to assess the magnitude of the silicosis and cancer risk among construction workers. Methods: In 1998, 1335 of 4173 invited construction workers with expected high cumulative exposure to quartz were studied for early signs of silicosis. In 2002 the study was repeated for 96 persons. Exposure measurements...
article 2005
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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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van der Veen, M. (author), Norde, W. (author), Stuart, M.C. (author)
The influence of electrostatic interactions on protein adsorption was studied by comparing the adsorption of lysozyme and succinylated lysozyme at silica surfaces. The succinylation affects the charge of the protein, but also the stability. Although changes in stability can have an influence on adsorption, our data show that the primary effect...
article 2004
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Gucek, M. (author), Gaspari, M. (author), Walhagen, K. (author), Vreeken, R.J. (author), Verheij, E.R. (author), van der Greef, J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The successful coupling of capillary electrochromatography (CEC) to an ion trap mass spectrometer via a nanoelectrospray interface (nESI) is described. Using a conductively coated tip butted to the end of a CEC column, it was possible to obtain a stable spray without any sheath liquid being employed. Selected small peptides were separated with...
article 2000
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Maat, B. (author), Radiobiologisch Instituut TNO (author)
Warfarin administered to tumor-bearing mice reduces the number of spontaneous lung metastases. Both macrophage inhibitors silica and carrageenan abolish the warfarin-induced decrease in tumour metastasis, which strongly supports the concept that the antitumour effect of coumarin derivatives is mediated by stimulation of macrophages. The results...
article 1980
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Okkerse, C. (author), Chemisch Laboratorium TNO (author)
doctoral thesis 1961
Searched for: subject:"Silicon%5C+Dioxide"
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