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Boot, M. (author), Frijters, P. (author), Luijten, C. (author), Somers, B. (author), Baert, R.S.G. (author), Donkerbroek, A. (author), Klein-Douwel, R.J.H. (author), Dam, N. (author), TNO Industrie en Techniek (author)Combustion behavior of various oxygenated fuels has been studied in a DAF heavy-duty (HD) directinjection (DI) diesel engine. From these fuels, it is well-known that they lead to lower particle (PM) emissions; however, for a given fuel oxygen mass fraction, there are significant differences in PM reduction. Although this can be traced back to...article 2009
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Kirilova, E. (author), Heiri, O. (author), Enters, D. (author), Cremer, H. (author), Lotter, A.F. (author), Zolitschka, B. (author), Hübener, T. (author), TNO Bouw en Ondergrond (author)We present a case study of the development of Sacrower See, a stratified, eutrophic lake in northeastern Germany, over the past 13,000 years. Total epilimnetic phosphorus (TP) concentrations were reconstructed quantitatively using a diatom-TP transfer function. Fossil chironomid assemblages were used to support the trophic reconstruction and...article 2009
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Li, Y. (author), de Vries, R. (author), Slaghek, T. (author), Timmermans, J. (author), Cohen Stuart, M.A. (author), Norde, W. (author), TNO Kwaliteit van Leven (author)A novel biocompatible and biodegradable microgel system has been developed for controlled uptake and release of especially proteins. It contains TEMPO-oxidized potato starch polymers, which are chemically cross-linked by sodium trimetaphosphate (STMP). Physical chemical properties have been determined for microgels of different weight ratios of...article 2009
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Klein-Douwel, R.J.H. (author), Donkerbroek, A.J. (author), van Vliet, A.P. (author), Boot, M.D. (author), Somers, L.M.T. (author), Baert, R.S.G. (author), Dam, N.J. (author), ter Meulen, J.J. (author), TNO Industrie en Techniek (author)High-speed imaging, spectroscopy and thermodynamical characterization are applied to an optically accessible, heavy-duty diesel engine in order to compare sooting and chemiluminescence behaviour of bio-derived, oxygenated fuels and various reference fuels. The fuels concerned include the bio-derived fuels Jatropha oil (pure), Jatropha...conference paper 2009
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Holtman, W. (author), Oppedijk, B. (author), Vennik, M. (author), Draaijer, A. (author), TNO Kwaliteit van Leven (author)Gases (e.g. oxygen) in the root environment are an important factor for plant development. This study aims to show whether it is possible to obtain an overview of oxygen profiles within the root zone using a limited amount of oxygen measurements in the root environment. A further aim was to demonstrate whether this technology can be used to...article 2009
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Slootmaker, S.M. (author), Chin A Paw, M.J.M. (author), Schuit, A.J. (author), van Mechelen, W. (author), Koppes, L.L.J. (author), TNO Kwaliteit van Leven (author)The purpose of this study was to examine the concurrent validity of the Personal Activity Monitor (PAM) accelerometer relative to the Actigraph accelerometer using oxygen consumption as a reference, and to assess the test-retest reliability of the PAM. Thirty-two fit, normal weight adults (aged 21-54) performed two activities, treadmill walking...article 2009
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van Dieën, J.H. (author), Putten, E.P. (author), Kingma, I. (author), de Looze, M.P. (author), TNO Kwaliteit van Leven (author)This study was designed to determine whether trunk extensor fatigue occurs during low-level activity and whether this is associated with a drop in muscle tissue oxygenation. Electromyography (EMG) feedback was used to impose constant activity in a part of the trunk extensor muscles. We hypothesized that electromyographic manifestations of...article 2009
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Offermans, P. (author), Tong, H.D. (author), van Rijn, C.J.M. (author), Merken, P. (author), Brongersma, S.H. (author), Crego-Calama, M. (author), TNO Industrie en Techniek (author)Palladium nanowires were fabricated on silicon substrates using conventional microfabrication techniques. Sensors based on such nanowires show a reversible response to hydrogen concentrations as low as 27 ppm with response times varying from 5 s (H2 concentrations >20%) to 30 s (H2 concentrations <100 ppm) at room temperature. The response times...article 2009
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Weelink, S.A.B. (author), Tan, N.C.G. (author), ten Broeke, H. (author), van den Kieboom, C. (author), van Doesburg, W. (author), Langenhoff, A.A.M. (author), Gerritse, J. (author), Junca, H. (author), Stams, A.J.M. (author), TNO Bouw en Ondergrond (author)A bacterium, strain BC, was isolated from a benzene-degrading chlorate-reducing enrichment culture. Strain BC degrades benzene in conjunction with chlorate reduction. Cells of strain BC are short rods that are 0.6 μm wide and 1 to 2 μm long, are motile, and stain gram negative. Strain BC grows on benzene and some other aromatic compounds with...article 2008
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de Haas, E.M. (author), Kraak, M.H.S. (author), TNO Kwaliteit van Leven (author)The absence of species in polluted sediments does not necessarily imply exclusion due to toxicity. Other factors, like for instance food availability and oxygen content, could also partly cause their absence. Hence, knowledge of the (combinations of) factors acting on individual organisms is essential in order to understand how populations can...article 2008
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Tanase, D. (author), Komen, N. (author), Draaijer, A. (author), Lange, J.F. (author), Kleinrensink, G.J. (author), Jeekel, J. (author), French, P.J. (author), TNO Kwaliteit van Leven (author), KvL (author)Leakage at the site of an anastomosis is the main, yet unsolved reason for mortality in abdominal surgery. Every year, a large number of patients die due to anastomotic leakage after surgery. An objective aid to monitor the anastomotic site pre- and postoperatively and detect leakage at an early stage, is needed. Therefore, a miniature, wireless...conference paper 2008
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Holtman, W. (author), Oppedijk, B. (author), Draaijer, A. (author), van Duijn, B. (author), Graven, P. (author), van Buren, J. (author), TNO Kwaliteit van Leven (author)To be able to use oxygen control in the root environment as cultivation tool, it is necessary to obtain representative profiles of the oxygen content within substrates. It was the aim of the current project to study whether it is possible to obtain oxygen profiles within substrates using a limited amount of oxygen measurements in the root...conference paper 2008
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TNO Kwaliteit van Leven (author), Madsen, L. (author), Pedersen, L.M. (author), Liaset, B. (author), Ma, T. (author), Petersen, R.K. (author), van den Berg, S. (author), Pan, J. (author), Müller-Decker, K.M. (author), Dülsner, E.D. (author), Kleemann, R. (author), Kooistra, T. (author), Døskeland, S.O. (author), Kristiansen, K. (author)The effect of n-6 polyunsaturated fatty acids (n-6 PUFAs) on adipogenesis and obesity is controversial. Using in vitro cell culture models, we show that n-6 PUFAs was pro-adipogenic under conditions with base-line levels of cAMP, but anti-adipogenic when the levels of cAMP were elevated. The anti-adipogenic action of n-6 PUFAs was dependent on a...article 2008
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TNO Kwaliteit van Leven (author), Chanteranne, B. (author), Branca, F. (author), Kardinaal, A. (author), Wahala, K. (author), Braesco, V. (author), Ladroite, P. (author), Brouns, F. (author), Coxam, V. (author)The estrogenic effects of soy isoflavones (IF) on symptoms of menopause are of particular interest. The aim of the present study was to improve compliance of IF in two IF-enriched foods providing the same IF circulating levels in postmenopausal women. Forty-two healthy postmenopausal women (mean age: 53.28 years) were recruited for a randomized,...article 2008
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Heiri, O. (author), Cremer, H. (author), Engels, S. (author), Hoek, W.Z. (author), Peeters, W. (author), Lotter, A.F. (author), TNO Bouw en Ondergrond (author)Lateglacial environments at Hijkermeer, northwest Netherlands, were reconstructed by means of chironomid, diatom and pollen analyses. Diatom assemblages indicate that Hijkermeer was a shallow, oligo- to mesotrophic lake during this period. Pollen assemblages reflect the typical northwest European Lateglacial vegetation development and provide an...article 2007
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Vermeulen, J. (author), van Gool, M.P.M. (author), Dorleijn, A.S. (author), Joziasse, J. (author), Bruning, H. (author), Rulkens, W.H. (author), Grotenhuis, J.T.C. (author), TNO Bouw en Ondergrond (author)After dredged sediments have settled in a temporary upland disposal site, ripening starts, which turns waterlogged sediment into aerated soil. Aerobic biological mineralization of organic matter (OM) and chemical oxidation of reduced sulfur compounds are the major biochemical ripening processes. Quantitative data describing these processes are...article 2007
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Smeets, P.A.M. (author), Vidarsdottir, S. (author), de Graaf, C. (author), Stafleu, A. (author), van Osch, M.J.P. (author), Viergever, M.A. (author), Pijl, H. (author), van der Grond, J. (author), TNO Kwaliteit van Leven (author)We previously showed that hypothalamic neuronal activity, as measured by the blood oxygen level-dependent (BOLD) functional MRI signal, declines in response to oral glucose intake. To further explore the mechanism driving changes in hypothalamic neuronal activity in response to an oral glucose load, we here compare hypothalamic BOLD signal...article 2007
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Havenith, G. (author), TNO Defensie en Veiligheid (author)Data on metabolic rates (n = 0;81) and clothing insulation (n = 96) of school children and adolescents (A, primary school: age 9-10; B, primary school: age 10-11 year; C, junior vocational (technical) education: age 13-16 (lower level); D, same as C but at advanced level; and E, senior vocational (technical) education, advanced level: age 16-18)...article 2007
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van Dorp, E. (author), Los, M. (author), Dirven, P. (author), Sarton, E. (author), Valk, P. (author), Teppema, L. (author), Stienstra, R. (author), Dahan, A. (author), TNO Defensie en Veiligheid (author)Introduction: Exposure to a hypoxic environment has a deleterious effect on physiological and mental functions. We studied the effect of added inspired CO2 during artificially induced hypoxic normobaric hypoxia (oxygen saturation ∼80%) on complex task performance. Methods: In random order, 22 healthy volunteers were exposed to 3 gas mixtures for...article 2007
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Tanase, D. (author), French, P.J. (author), Komen, N. (author), Kleinrensink, G.J. (author), Jeekel, J. (author), Lange, J.F. (author), Draaijer, A. (author), TNO Kwaliteit van Leven (author)Many patients still die every year as a result of anastomotic leakage after surgery. The medical world needs an objective aid to detect leakage during surgery and during the critical recovery period. We propose a miniature measurement system to detect adequate tissue oxygenation pre- and postoperatively (continuously for 7 days) on the colon....conference paper 2007