Searched for: author:"Schreurs, W.H.P."
(1 - 19 of 19)
document
Soekarjo, D.D. (author), de Pee, S. (author), Bloem, M.W. (author), Tjiong, R. (author), Yip, R. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Objective: To determine prevalence and contributing factors of anaemia in adolescents. Design: Cross-sectional study of anaemia prevalence, socio-economic status and puberty. Setting: Schools in East Java, Indonesia. Subjects: Male and female adolescent pupils (age 12-15 y; n = 6486). Results: Anaemia prevalence was 25.8% among girls (n = 3486),...
article 2001
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van Vliet, T. (author), van Schaik, F. (author), Schreurs, W.H.P. (author), van den Berg, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
In view of controversies about assessment of the β-carotene cleavage activity, methodological aspects and problems of the dioxygenase assay are described. Using rat and hamster intestinal preparations the method was optimized on retinal formation, the only cleavage product we could demonstrate. It appeared that the cell fraction with the highest...
article 1996
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van Vliet, T. (author), Schreurs, W.H.P. (author), van den Berg, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Postprandial response curves of β-carotene and retinyl esters in a triglyceride-rich lipoprotein (TRL) fraction were evaluated as a potential measure of β-carotene uptake and cleavage. β-Carotene, retinyl ester, and triglyceride concentrations in the TRI, fraction (density < 1.006 kg/L) and plasma were measured in 10 men for 8 or 16 h after an...
article 1995
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Bloem, M.W. (author), Wedel, M. (author), van Agtmaal, E.J. (author), Speek, A.J. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A group of 134 school children aged 3-9 y, with signs of conjunctival xerosis, from the rural area of Sakorn Nakhon province of Northeast Thailand were selected for a controlled study on the short-term effect (2 wk) of a single, oral high dose of vitamin A on iron metabolism. After collection of the baseline data, children within villages were...
article 1990
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Egger, R.J. (author), Hofhuis, E.H. (author), Bloem, M.W. (author), Chusilp, K. (author), Wedel, M. (author), Intarakhao, C. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), Instituut voor toegepaste radiobiologie en immunologie TNO (author)
article 1990
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Speek, A.J. (author), van Agtmaal, E.J. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), van Haeringen, N.J. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A fast and sensitive high-performance liquid chromatographic (HPLC) method for the determination of vitamin A (all-trans retinol) in 50 ??l human tear fluid is described. After deproteinization with ethanol and extraction with n-hexane, retinol is separated from the extract on a straight-phase HPLC column and detected fluorometrically. Vitamin A...
article 1986
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van den Berg, H. (author), Boshuis, P.G. (author), Schreurs, W.H.P. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)
A reliable and sensitive radioassay is described for the determination of vitamin D in milk powder and infant formula. After saponification of the sample interfering compounds like sterols are removed by digitonin precipitation and chromatography on small columns packed with alumina. [3H] Vitamin D is added to the sample as an internal standard,...
article 1986
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Speek, A.J. (author), Wongkham, C. (author), Limratana, N. (author), Saowakontha, S. (author), Schreurs, W.H.P. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
Chemicals/CAS: n,n dimethylacetamide, 127-19-5; retinol, 68-26-8, 82445-97-4; Vitamin A, 11103-57-4
article 1986
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van den Berg, H. (author), Boshuis, P.G. (author), Schreurs, W.H.P. (author), Instituut CIVO-Toxicologie en Voeding TNO (author)
conference paper 1986
document
Speek, A.J. (author), Schrijver, J. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A high‐performance liquid chromatographic (HPLC) method is described for the simultaneous analysis of E vitamers α‐, and β‐, γ‐ and δ‐tocopherol and α‐tocotrienol in seed oils. After diluting the oils with n‐hexane, E vitamers are separated by HPLC and detected fluorometrically. Standardization is achieved, using electron‐impact mass...
article 1985
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Schreurs, W.H.P. (author), Odink, J. (author), Egger, R.J. (author), Wedel, M. (author), Bruning, P.F. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
Chemicals/CAS: Ascorbic Acid, 50-81-7; Calcifediol, 19356-17-3; Vitamin A, 11103-57-4; Vitamin B 12, 68-19-9; Vitamin E, 1406-18-4; Vitamins
article 1985
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van der Greef, J. (author), Tas, A.C. (author), Bouwman, J. (author), ten Noever de Brauw, M.C. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
Field-desorption and fast atom-bombardment mass spectrometry are promising techniques for generating profiles of complex mixture of non-volatile compounds. This was concluded from results obtained with urine and wine samples. Pattern recognition techniques, such as non-linear mapping, K-nearest neighbours and principal component analysis, in...
article 1983
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Speek, A.J. (author), Odink, J. (author), Schrijver, J. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A reliable high-performance liquid chromatographic method is presented for the determination of the urinary free catecholamines noradrenaline, adrenaline and dopamine. Urine is purified on a column of immobilized boric acid. Catecholamines are separated by ion-pair reversed phase high-performance liquid chromatography and detected...
article 1983
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van den Berg, H. (author), Bogaards, J.J.P. (author), Sinkeldam, E.J. (author), Schreurs, W.H.P. (author), Instituut CIVO-Toxicologie en voeding TNO (author)
article 1982
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Speek, A.J. (author), van Schaik, F. (author), Schrijver, J. (author), Schreurs, W.H.P. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A reliable high-performance liquid chromatographic (HPLC) method is developed for the analysis of FAD in whole blood of humans. The method is able to separate FAD, FMN and Rb from each other and from interfering compounds. A reliable and sensitive detection of FAD has been obtained by selecting the optimal pH of the mobile phase and optimal...
article 1982
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Schreurs, W.H.P. (author), van Rijn, H.J.M. (author), van den Berg, H. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
A study has been made of the serum 25-hydroxycholecalciferol (25-HCC) levels in six groups of women. Significant differences were found between the one pregnant group and the two reference groups as well as between the one pregnant group and two of the three groups using oral contraceptives. No significant differences were found between the...
article 1981
document
Dries, W.J.H. (author), Schreurs, W.H.P. (author), Buyze, G. (author), Centraal instituut voor voedingsonderzoek TNO (author)
Pauling introduced the concept of orthomolecular psychiatry. According to this concept, the treatment of mental disease should benefit by optimalisation of the molecular environment of the mind. In this connection, the effect of multiple vitamin administration has been studied in 73 hospitalised psychiatrie patients who were divided in two equal...
article 1978
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Schelp, F.P. (author), Migasena, P. (author), Pongpaew, P. (author), Schreurs, W.H.P (author), TNO voeding (author)
1. The concentrations of serum protein albumin, prealbumin and transferrin were determined in twenty-eight cases of protein-energy malnutrition (PEM) with infection, together with the levels of serum proteinase inhibitors (PI), alpha1-antitrypsin (AT), alpha1-antichymotrypsin (Ach), alpha2-macroglobulin (alpha2M) and inter-alpha-trypsin...
article 1977
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Elferink, J.G.R. (author), van Noordwijk, J. (author), Schreurs, W.H.P. (author), Salemink, C.A. (author), Centraal Instituut voor Voedingsonderzoek TNO (author)
The preparation and muscarinic activities of a number of 5-alkyl substituted analogues of the dioxolane of Fourneau are described. Muscarinic activity decreases rapidly when the alkyl chain lengthens, moreover a change from parasympathomimetic into parasympatholytic activity occurs. The stereochemical aspects with regard to the 5-position are...
article 1972
Searched for: author:"Schreurs, W.H.P."
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