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Blanquet, S. (author), Zeijdner, E. (author), Beyssac, E. (author), Meunier, J.-P. (author), Denis, S. (author), Havenaar, R. (author), Alric, M. (author), TNO Voeding (author)
Purpose. The purpose of this study was to demonstrate the potential of a dynamic, multicompartmental in vitro system simulating the human stomach and small intestine (TIM-1) for studying the behavior of oral drug dosage forms under various physiological gastrointestinal conditions. Methods. Two model drug compounds were studied in TIM-1: a...
article 2004
document
Verwei, M. (author), Arkbåge, K. (author), Havenaar, R. (author), van den Berg, H. (author), Witthöft, C. (author), Schaafsma, G. (author), TNO Voeding (author)
Dairy products are a potential matrix for folate fortification to enhance folate consumption in the Western world. Milk folate-binding proteins (FBP) are especially interesting because they seem to be involved in folate bioavailability. In this study, folate bioaccessibility was investigated using a dynamic computer-controlled gastrointestinal...
article 2003
document
Oomen, A.G. (author), Tolls, J. (author), Sips, A.J.A.M. (author), Groten, J.P. (author)
Children might be exposed substantially to contaminants such as lead via soil ingestion. In risk assessment of soil contaminants there is a need for information on oral bioavailability of soilborne lead. Oral bioavailability can be seen as the result of four steps: (1) soil ingestion; (2) mobilization from soil during digestion, i.e.,...
article 2003
document
Arkbåge, K. (author), Verwei, M. (author), Havenaar, R. (author), Witthöft, C. (author), TNO Voeding (author)
Milk products are only moderate sources of folate. Nevertheless, they are of interest due to their content of folate-binding proteins (FBP), which in some studies have been reported to increase folate bioavailability. The effect of FBP on folate bioavailability has been widely discussed. The aim of this study was to investigate the...
article 2003
document
Avantaggiato, G. (author), Havenaar, R. (author), Visconti, A. (author), TNO Voeding (author)
A novel approach is presented herein to study the intestinal absorption of mycotoxins by using a laboratory model that mimics the metabolic processes of the gastrointestinal (GI) tract of healthy pigs. This model was used to evaluate the small-intestinal absorption of zearalenone from contaminated wheat (4.1 mg/kg) and the effectiveness of...
article 2003
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TNO BIBRA (author), Edwards, C.A. (author), Rumney, C. (author), Davies, M. (author), Parrett, A.M. (author), Dore, J. (author), Martin, F. (author), Schmitt, J. (author), Stahl, B. (author), Norin, E. (author), Midtvedt, T. (author), Rowland, I.R. (author), Heavey, P. (author), Köhler, H. (author), Stocks, B. (author), Schroten, H. (author)
Objectives: Bacterial colonization of the infant gut may have important influences on the development of gastrointestinal, respiratory, and allergic disease. Early diet is a major determinant of the gut microflora. It is very difficult to carry out studies in human infants that can investigate the interaction of diet, flora, and mucosa. In this...
article 2003
document
Knippels, L.M.J. (author), Penninks, A.H. (author), TNO Voeding (author)
For the safety evaluation of genetically engineered crops, the potential allergenicity of the newly introduced protein(s) has become an important issue. There is, however, no universal and reliable test system for the evaluation of the allergic sensitizing ability of food proteins. Therefore, there is a growing interest in the development of...
article 2002
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Dallinga, J.W. (author), Krul, C.A.M. (author), Tenfelde, A. (author), Moonen, E.J.C. (author), Vermeer, I.T.M. (author), van Doorn, D. (author), Schothorst, R.C. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The thermal energy analyser (TEA) is considered to be the gold standard for the determination of nitrosamines. However, since many laboratories cannot justify the use of such a very specific detection system, alternative detection methods are useful. While standard gas chromatography (GC) detectors lack the selectivity of the TEA detector, mass...
article 2001
document
Krul, C.A.M. (author), Luiten-Schuite, A. (author), Baan, R. (author), Verhagen, H. (author), Mohn, G. (author), Feron, V. (author), Havenaar, R. (author)
The TNO gastro-Intestinal tract Model (TIM) is a dynamic computer-controlled in vitro system that mimics the human physiological conditions in the stomach and small intestine. In the current TIM physiological parameters such as pH, temperature, peristaltic movements, secretion of digestion enzymes, bile and pancreatic juices, and absorption of...
article 2000
document
Knippels, L.M.J. (author), Houben, G.F. (author), Spanhaak, S. (author), Penninks, A.H. (author)
We developed an oral sensitization protocol for food proteins for the rat. Young Brown Norway (BN) rats were exposed to 1 mg ovalbumin (OVA) by daily gavage dosing for 42 days without the use of an adjuvant. OVA-specific IgE and IgG responses were determined by ELISA. On an oral challenge with OVA some clinical symptoms of food allergy-like...
article 1999
document
de Bie, A.T.H.J. (author), van Ommen, B. (author), Bär, A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The absorption, disposition, metabolism, and excretion of 14C-labeled γ-cyclodextrin ([14C]γ-CD) was examined in four separate experiments with Wistar rats. In experiment 1, [14C]γ-CD (25 μCi, 600 mg/kg body wt) was administered intravenously to four male and four female conventional rats. In experiment 2, [14C]γ- CD (25 μCi, 1000 mg/kg body wt)...
article 1998
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