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Prins Maurits Laboratorium TNO (author), Duisterwinkel, A.E. (author), van Bokhoven, J.J.G.M. (author)A calorimetric method is described for the determination of adsorption and desorption of adsorptives that are liquid at room temperature, focussing on the sorption of water. Together with the isotherms, the sorption thermodynamics is determined in one experiment by determining the heat flow needed for generating the vapour and the heat flow...article 1995
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de Kruijf, N. (author), Rijk, R. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)A study was carried out to compare the actual overall migration from packaging materials into food simulants during heating in a microwave oven, and the overall migration from these materials into food simulants applying time and temperature conditions stipulated in the current EC and Dutch legislation on food packaging. It was demonstrated that...article 1994
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Instituut voor Zintuigfysiologie TNO (author), Lotens, W.A. (author)In this monograph the effects of clothing on human heat transfer are described. The description is based on the physics of heat and mass transfer, depending on the design of the clothing, the climate, and the activity of the wearer. The resulting model has been stepwise implemented in computer programs and has been evaluated with human subject...doctoral thesis 1993
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Radiologische Dienst TNO (author), van Dijk, J.W.E. (author), Julius, H.W. (author)In constant temperature hot gas TLD systems the heating profile of the TL chip is an exponential function of time. A method is presented which enables glow curve deconvolution for non-linear heating systems. The reproducibility of the heating process of constant temperature hot gas systems can be such that a fast linear optimisation procedure...article 1993
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Lotens, W.A. (author)A simple analytical model has been developed to simulate the cooling of the hands due to touching various types of cold material. The model consisted of a slab of tissue, covered on both sides with skin. The only active mechanism was the skin blood flow. The blood flow was controlled by body core temperature, mean skin temperature, and local...article 1992
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Daanen, H.A.M. (author), van de Linde, F.J.G. (author)Four noninvasive rewarming techniques for mildly hypothermic subjects were compared. Seven subjects were cooled in a water bath of 15°C for 2 h to an average esophageal temperature (Tes) of 36°C. Thereafter, the subjects were rewarmed by immersion of the body in a water bath of 42°C (Method 1), the body but not the extremities in water of 42°C ...article 1992
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TNO Industrie en Techniek (author), A. Nijnatten, Peter (author)Directional emittance plays an important role in the calculation of radiative heat exchange. It partly determines the thermal insulation of single and multiple glazing and the efficiency of solar collectors. An emissiometer has been designed and built, capable for measurements of the directional emittance at angles up to 85°. The emissiometer...conference paper 1992
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Lotens, W.A. (author), Havenith, G. (author)Based on a physical model, in which a human is depicted as a collection of appropriately sized cylinders, clothing insulation and vapour resistance are calculated for standing persons in still air, when the clothing ensemble thickness, total fabric thickness, number of clothing layers and number of trapped air layers are specified for each...article 1991
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't Hart, B.A. (author), Botman, C.A.D. (author), Bakker, N.P.M. (author)Peripheral blood mononuclear cells (PBMC) from Rhesus monkeys previously immunized with bovine type II collagen to induce arthritis were cultured with the same antigen. Because the native protein is poorly soluble in culture medium a heating step is often used. The antigen in this form induced PBMC proliferation, but epitopes for the induction...article 1991
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Havenith, G. (author), Heus, R. (author), Lotens, W.A. (author)Using the trace gas diffusion method, the vapour resistance of three clothing ensembles (two permeable and one impermeable) was determined for four subjects, sitting, standing or walking at 0.3 and 0.9 m/s, combined with three wind speeds of <0.15, 0.7 and 4.1 m/s. Sitting increased vapour resistance by 12-36%, whereas walking and wind decreased...article 1990
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Havenith, G. (author), Heus, R. (author), Lotens, W.A. (author)The individual and combined effects of sitting, walking at two speeds and three wind speeds on the insulation value of three clothing ensembles were determined on four subjects (two with loose clothing fit and two with tight clothing fit). Subjects were wrapped in synthetic foil before dressing in order to avoid sweat evaporation and so increase...article 1990
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Havenith, G. (author), van Middendorp, H. (author)An experiment was set up to quantify the relative influence of fitness, acclimatization, gender and anthropometric measures on physiological responses to heat stress. For this purpose, 12 male and 12 female subjects were exposed to a neutral [ambient temperature (T(a)) 21°C, relative humidity (r.h. 50%)], a warm, humid (T(a) 34°C, r.h. 80%) and...article 1990
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Collet, P.J. (author), Hoofdgroep Maatschappelijke Technologie TNO (author)The economics of small scale gas turbine based cogeneration systems are analyzed on the basis of avoided costs for an electric utility exploiting such systems. This concerns a theoretical study in which the cogeneration system as a means for electricity generation is assumed to supplant the building of new central electricity generating plant....conference paper 1989
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Instituut voor Zintuigfysiologie TNO (author), Lotens, W.A. (author)The effect of geometric factors on insulation was calculated mathematically for standing humans. It was found that internal radiative heat transfer in an ensemble was significant for insulation, that intrinsic clothing insulation is a useful concept only for indoor climates, and that shape plays a minor role. The literature agrees closely on...article 1989
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van Dijk, H.A.L. (author), Kratz, P. (author), Technisch Physische Dienst TNO - TH (author)Eén van de aktiviteiten van de Technisch Physische Dienst (TPD) van TNO op het gebied van onderzoek naar de thermische benutting van zonne-energie betreft het beproeven van uiteenlopende soorten van voorzieningen voor de tijdelijke opslag van de ingevangen zonnewarmte. In de loop der jaren groeide de behoefte om de opgedane ervaringen op dit...article 1987
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Gaubius Instituut TNO (author), Kluft, C. (author), Jie, A.F.H. (author), Sprengers, E.D. (author), Verheijen, J.H. (author)Inhibition of tissue-type plasminogen activator (t-PA) by pooled plasma could be ascribed for only 60% to the endothelial cell type PA inhibitor. The residual inhibition is ascribed to a so-far undescribed plasma component present at 0.2 nmol/l. This component shows reversible binding to t-PA with an apparent K(i) of 10 pmol/l (does not hinder t...article 1985
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- Instituut voor milieuhygiëne en gezondheidstechniek TNO (author), van Dongen, J.E.F. (author) conference paper 1983
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Jenks, R.L. (author), Astrup, T. (author), Gaubius instituut TNO (author)Treatment of human citrated plasma with glass has complex effects on the fibrinolytic system. While the spontaneous euglobulin activity is only slightly affected by the glass treatment, the activity precipitated in the presence of dextran sulphate diminishes rapidly with increasing amounts of glass. With common glass a minimum is reached, and...article 1980
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Polak, R.L. (author), Molenaar, P.C. (author), Medisch Biologisch Laboratorium TNO (author)Demethylation by sodium benzenethiolate has been used to analyse mixtures of isotopic variants of acetylcholine (ACh) by gas chromatography/mass spectrometry (GC/MS). The present experiments show that demethylation by pyrolysis is also suitable for the simultaneous determination of deuterium labelled variants of ACh by means of GC/MS. However,...article 1974
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- Bleichrodt, J.F. (author), Berends-Van Abkoude, E.R. (author), Medisch Biologisch Laboratorium TNO (author) article 1968