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document
Torre H.W., van der (author), van Dokkum, W. (author), Schaafsma, G. (author), Wedel, M. (author), Ockhuizen, T. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
After a 5-week period of low selenium intake, twenty-four Dutch men received 55, 135 or 215 μg Se/d as Se-rich meat or bread for a 9-week period. Four unsupplemented subjects served as controls. Plasma Se increased more rapidly than erythrocyte Se levels; the increases were significantly dependent (P < 0.001) on Se intake level. Glutathione...
article 1991
document
de Vos, R.H. (author), van Dokkum, W. (author), Schouten, A. (author), Jong de -Berkhout, P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Over a period of 2.5 yr, 221 different food items of a 'market basket' of 18-yr-old males were purchased every 3 months. In total, 10 market baskets were collected. The foodstuffs were prepared by normal methods and combined into 23 commodity groups. Homogenates were prepared from each commodity group, followed by analysis for 17 different...
article 1990
document
van Dokkum, W. (author), Schrijver, J. (author), Wesstra, J.A. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)
The biological variability of the values of various biochemical indices used for the assessment of the nutritional status of man was investigated in 4 healthy male volunteers (mean age 23 years). They were given a constant diet for 60 d, with the nutrient intake at the level of the Dutch recommendations. Blood was collected twice a week and 24-h...
article 1990
document
van Dokkum, W. (author), de Vos, R.H. (author), Muys, Th. (author), Wesstra, J.A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
1. During a period of 2.5 years, every 3 months 221 different food items forming a 'market basket' were purchased, prepared and divided into twenty-three food-commodity groups. The 'market basket' was based on a study of the dietary intake of 18-year-old male, Dutch adolescents. In the (homogenized) food groups various minerals and trace...
article 1989
document
van Dokkum, W. (author), Wesstra, A. (author), Luyken, R. (author), Hermus, R.J.J. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
Twelve young men were given for periods of 20 d, each of three mixed diets, namely a low-protein (LP) diet (9% total energy as protein, 67% of animal origin), a high-animal-protein (HA) diet (16% total energy as protein, 67% of animal origin) and a high-vegetable-protein (HV) diet (16% total energy as protein, 67% of vegetable origin). Retention...
article 1986
document
de Vos, R.H. (author), van Dokkum, W. (author), Olthof, P.D.A. (author), Quirijns, J.K. (author), Muys, T. (author), van der Poll, J.M. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Over a period of 2 yr 126 different food items of a market basket of 16-18 yr old males were purchased every 2 months. The foodstuffs were prepared as for eating, and were combined in 12 commodity groups. Twelves samples of each food group were homogenized and analysed for 78 different chemicals, including pesticides, PCBs, bromine, heavy metals...
article 1984
document
van Dokkum, W. (author), de Boer, B.C.J. (author), van Faassen, A. (author), Pikaar, N.A. (author), Hermus, R.J.J. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
We suggest that a lower faecal pH may be correlated with a lower mortality of large-bowel cancer and that faecal pH should always be considered in epidemiological studies on the role of diet in colon carcinogenesis.
article 1983
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