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Zocht je misschien: silvia, silico?

Particulate matter in the workplace: effects of a mental models-based folder combined with a practical assignment

T. A. M. Stege (Onderzoeker); J.F.B. (John) Bolte (Lector); L. Claassen (Onderzoeker); D. R. M. Timmermans (Onderzoeker)

Background: With increasing knowledge on the adverse health efects of certain constituents of PM (particulate matter), such as silica, metals, insoluble ions, and black carbon, PM has been under the attention of work safety experts. Previously, we investigated the perceptions of blue-collar workers in …

2022-05-13GezondheidArtikel

Shear bond strength of two composite resin cements to multiphase composite resin after different surface treatments and two glass-ceramics

de Kuijper, Maurits C.F.M.; Gresnigt, Marco M.M.; Kerdijk, Wouter; Cune, Marco S.

AIM: To compare the shear bond strength (SBS) after aging of two dual-curing composite resin cements to multiphase composite resin (experiment) and glass-ceramics (control). METHODS: Seventy computer-aided design/computer-aided manufacturing (CAD/CAM) blocks were prepared: 24 multiphase composite resin …

2019-02-05AlgemeenArtikel

Influence of resins in ground passenger car tire rubber on the devulcanization process : Proeftuin Recycling - Future Proof Polymers, project 395

Johannes W. van Hoek (Lid Lectoraat); Geert Heideman (Associate Lector); Yvette Verdonk; Wilma K. Dierkes (Lid Lectoraat)

In the recent past, the use of resins in modern tread compounds has increased considerably, in order to further improve tire properties. Based on the experience with silica-silane filler system, which led to a different network structure and a significantly changed devulcanization behavior, the influence …

2019-01-01TechniekRapport

Implications of the Use of Silica as Active Filler in Passenger Car Tire Compounds on Their Recycling Options

Johannes W. van Hoek (Lid Lectoraat); Geert Heideman (Associate Lector); Jacques W. Noordermeer; Wilma K. Dierkes; Anke Blume

Tires are an important vehicle component, as car handling, safety and fuel economy depend for a major part on the tire composition and construction. As a consequence, tires are improved continuously. The most prominent improvement in the recent past was the use of a silica-silane filler system in passenger …

2019ICT & Media; …Artikel

Effect of immediate dentine sealing on the fracture strength of lithium disilicate and multiphase resin composite inlay restorations

van den Breemer, Carline R G; Özcan, Mutlu; Cune, Marco S; van der Giezen, Rianne; Kerdijk, Wouter; Gresnigt, Marco M M

PURPOSE: Limited information is available on the effect of Immediate Dentin Sealing (IDS) on the fracture strength of indirect partial posterior restorations. This study evaluated the effect of IDS on the fracture strength and failure types of two indirect restorative materials. MATERIALS AND METHODS: …

2017-08-01AlgemeenArtikel

Toxicity assessment of air-delivered particle-bound polybrominated diphenyl ethers

Luthe, G. (Gregor) (Lector)

Human exposure to polybrominated diphenyl ethers (PBDEs) can occur via ingestion of indoor dust, inhalation of PBDE-contaminated air and dust-bound PBDEs. However, few studies have examined the pulmonary toxicity of particle-bound PBDEs, mainly due to the lack of an appropriate particle-cell exposure …

2014-01-01AlgemeenArtikel

Synthesis of α- and β-D-glucopyranuronate 1-phosphate and α-D-glucopyranuronate 1-fluoride: intermediates in the synthesis of D-glucuronic acid from starch

Heeres, André (Biobased Ingredients And Materials); Van Doren, Henk A.; Gotlieb, Kees F.; Bleeker, Ido Pieter

The title uronates were prepared by 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) catalysed sodium hypochlorite oxidation of α- and β-D-glucopyranosylphosphate (α-/β-Glc-1-P) and α-D-glucopyranosyl fluoride (α-Glc-1-F). Quantitative recovery of the TEMPO catalyst was achieved by azeotropic distillation …

1997-04-01AlgemeenArtikel

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