- document
-
Atuonwu, J.C. (author), van Straten, G. (author), van Deventer, H.C. (author), van Boxtel, A.J.B. (author)Conventionally, energy-saving techniques in drying technology are sequential in nature. First, the dryer is optimized without heat recovery and then, based on the obtained process conditions, heat recovery possibilities are explored. This work presents a methodology for energy-efficient adsorption dryer design that considers sensible and latent...article 2011
- document
-
Atuonwu, J.C. (author), van Straten, G. (author), van Deventer, H.C. (author), van Boxtel, A.J.B. (author)Low-temperature drying is important for heat-sensitive products, but at these temperatures conventional convective dryers have low energy efficiencies. To overcome this challenge, an energy efficiency optimization procedure is applied to a zeolite adsorption dryer subject to product quality. The procedure finds a trade-off between the improved...article 2011
- document
-
Offermans, P. (author), Crego-Calama, M. (author), Brongersma, S.H. (author), IMEC/Holst Centre, High Tech Campus 31, 5656AE Eindhoven, Netherlands (author)Nanowires show great promise for use in next generation (bio-)chemical sensing devices because of their high surface to volume ratio enabling efficient modulation of their current by charges or dipoles present at the surface. Here, we present a gas sensing device based on vertical InAs nanowire arrays grown without metal catalyst particles. The...conference paper 2010
- document
-
van Bergen, F. (author), Spiers, C. (author), Floor, G. (author), Bots, P. (author), TNO Bouw en Ondergrond (author)Field experiments and laboratory studies have shown that swelling of coal takes place upon contact with carbon dioxide at underground pressure and temperature conditions. Understanding this swelling behavior is crucial for predicting the performance of future carbon dioxide sequestration operations in unminable coal seams conducted in...article 2009
- document
-
Primo-Martín, C. (author), Sözer, N. (author), Hamer, R.J. (author), van Vliet, T. (author), TNO Kwaliteit van Leven (author)A crust model is described that is suited to study crispness of bread crusts as a function of steady state water activity. The study of crispness of this type of products as a function of water activity is complicated since the way a bread crust fractures does not depend on the crust only but also on the properties of the crumb, the curvature of...article 2009
- document
-
Abu-Zahra, M.R.M. (author), Feron, P.H.M. (author), Jansens, P.J. (author), Goetheer, E.L.V. (author), TNO Industrie en Techniek (author)This work describes a study in advanced post-combustion based on CO2-capture technologies to be integrated within the Hypogyny concept (electricity generation with co-hydrogen production). Two different Hypogen concepts based on integrating IGCC (Integrated Gasification Combined Cycle) and post-combusting CO2 capture are proposed and...article 2009
- document
-
van Nieuwenhuijzen, N.H. (author), Meinders, M.B.J. (author), Tromp, R.H. (author), Hamer, R.J. (author), van Vliet, T. (author), TNO Kwaliteit van Leven (author), KvL (author)Crispness is an important quality characteristic of dry solid food products such as crispy rolls. Its retention is directly related to the kinetics of water uptake by the crust. In this study, a method for the evaluation of the water sorption kinetics in bread crust is proposed. Two different sorption experiments were used: an oscillatory...article 2008
- document
-
Kudryashova, E.V. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author), KvL (author)The possibility of modulating the mesoscopic properties of food colloidal systems by the dielectric constant is studied by determining the impact of small amounts of ethanol (10%) on the adsorption of egg white ovalbumin onto the air-water interface in the absence and presence of pectin. The adsorption kinetics was monitored using tensiometry....article 2008
- document
-
Ganzevles, R.A. (author), Fokkink, R. (author), van Vliet, T. (author), Cohen Stuart, M.A. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Based on earlier reported surface rheological behaviour two factors appeared to be important for the functional behaviour of mixed protein/polysaccharide adsorbed layers at air/water interfaces: (1) protein/polysaccharide mixing ratio and (2) formation history of the layers. In this study complexes of β-lactoglobulin (positively charged at pH 4...article 2008
- document
-
de Weert, J. (author), de la Cal, A. (author), van den Berg, H. (author), Murk, A. (author), Langenhoff, A. (author), Rijnaarts, H. (author), Grotenhuis, T. (author), TNO Bouw en Ondergrond (author)The surfactant nonylphenol (NP) is an endocrine-disrupting compound that is widely spread throughout the environment. Although environmental risk assessments are based on total NP concentrations, only the bioavailable fraction posses an environmental risk. The present study describes the bioavailability and biodegradability of NP over time in...article 2008
- document
-
Energieonderzoek Centrum Nederland (author), de Boer, R. (author), Bakker, E.J. (author)Recently small-scale thermally driven chillers have gained a lot of interest because their potential to save primary energy, to reduce electricity peaks on the grids and to improve cost benefit ratio of micro-CHP units when combined into tri-generation systems. ECN has developed a small-scale (output < 5 kW) silicagel-water adsoprtion chiller...conference paper 2008
- document
-
Drissen, R.E.T. (author), Maas, R.H.W. (author), van der Maarel, M.J.E.C. (author), Kabel, M.A. (author), Schols, H.A. (author), Tramper, J. (author), Beeftink, H.H. (author), TNO Kwaliteit van Leven (author)The kinetics of cellulose hydrolysis by commercially available Cellubrix were described mathematically, with Avicel and wheat straw as substrates. It was demonstrated that hydrolysis could be described by three reactions: direct glucose formation and indirect glucose formation via cellobiose. Hydrolysis did not involve any soluble oligomers...article 2007
- document
-
Avantaggiato, G. (author), Havenaar, R. (author), Visconti, A. (author), TNO Kwaliteit van Leven (author)A laboratory model, set to simulate the in vivo conditions of the porcine gastrointestinal tract, was used to study the small intestinal absorption of several mycotoxins and the effectiveness of Standard Q/FIS (a carbon/aluminosilicate-based product) in reducing mycotoxin absorption when added to multitoxin-contaminated diets. Mycotoxins were...article 2007
- document
-
Wijntje, R. (author), Bosch, H. (author), de Haan, A.B. (author), Bussmann, P.J.T. (author), TNO Kwaliteit van Leven TNO Bouw en Ondergrond (author)In prior work we studied the adsorption of triglycine on zeolite Y under reference conditions. This study aims to solve the question of which adsorbent properties and process conditions influence the adsorption triglycine from an aqueous solution by zeolite Y. Relevant zeolite parameters to study are: the amount of acidic sites (Si/Al2 ratio),...article 2007
- document
-
van Nieuwenhuijzen, N.H. (author), Tromp, R.H. (author), Hamer, R.J. (author), van Vliet, T. (author), TNO Kwaliteit van Leven (author)In this work, water sorption kinetics of bread crust are described using an oscillatory sorption test in combination with a Langmuir type equation. Both kinetic and thermodynamic information could be obtained at the same time. An advantage of applying a Langmuir type equation for a quantitative description of the water uptake kinetics is that no...article 2007
- document
-
Ganzevles, R.A. (author), Kosters, H. (author), van Vliet, T. (author), Stuart, M.A.C. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Because the formation of protein/polysaccharide complexes is dominated by electrostatic interaction, polysaccharide charge density is expected to play a major role in the adsorption behavior of the complexes. In this study, pullulan (a non-charged polysaccharide) carboxylated to four different charge densities (fraction of carboxylated subunits:...article 2007
- document
-
Wierenga, P.A. (author), Egmond, M.R. (author), Voragen, A.G.J. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)Unfolding of proteins has often been mentioned as an important factor during the adsorption process at air-water interfaces and in the increase of surface pressure at later stages of the adsorption process. This work focuses on the question whether the folding state of the adsorbed protein depends on the rate of adsorption to the interface,...article 2006
- document
-
Ganzevles, R.A. (author), Zinoviadou, K. (author), van Vliet, T. (author), Stuart, M.A.C. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)There is a large interest in mixed protein/polysaccharide layers at air-water and oil-water interfaces because of their ability to stabilize foams and emulsions. Mixed protein/polysaccharide adsorbed layers at air-water interfaces can be prepared either by adsorption of soluble protein/ polysaccharide complexes or by sequential adsorption of...article 2006
- document
-
Wierenga, P.A. (author), Kosters, H. (author), Egmond, M.R. (author), Voragen, A.G.J. (author), de Jongh, H.H.J. (author), TNO Kwaliteit van Leven (author)The stability of adsorbed protein layers against deformation has in literature been attributed to the formation of a continuous gel-like network. This hypothesis is mostly based on measurements of the increase of the surface shear elasticity with time. For several proteins this increase has been attributed to the formation of intermolecular...article 2006
- document
-
van Boxtel, E.L. (author), van Koningsveld, G.A. (author), Koppelman, S.J. (author), van den Broek, L.A.M. (author), Voragen, A.G.J. (author), Gruppen, H. (author), TNO Kwaliteit van Leven (author)A new, fast, large-scale purification method for Ber e 1, the major allergen from Brazil nuts, using expanded bed adsorption (EBA) chromatography, is presented. Using EBA, crude extracts can be applied to a fluidized column, which allows the unhindered passage of particulate impurities, thereby avoiding time-consuming centrifugation or...article 2006