Searched for: subject:"Biological%5C+Availability"
(1 - 20 of 32)

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Kong, H. (author), Wang, M. (author), Venema, K. (author), Maathuis, A. (author), van der Heijden, R. (author), van der Greef, J. (author), Xu, G. (author), Hankemeier, T. (author), TNO Kwaliteit van Leven (author)
A high-performance liquid chromatography-high resolution Fourier transform ion cyclotron resonance mass spectrometry (HPLC-FTICR-MS) method was developed to investigate the metabolism of ginsenosides in in vitro models of the gastro-intestinal tract. The metabolites were identified by high-resolution tandem mass spectrometry. Degradation and...
article 2009
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Vermeulen, M. (author), Klöpping-Ketelaars, I.W.A.A. (author), van den Berg, R. (author), Vaes, W.H.J. (author), TNO Kwaliteit van Leven (author), KvL (author)
The aim of this study was to determine the bioavailability and kinetics of the supposed anticarcinogen sulforaphane, the hydrolysis product of glucoraphanin, from raw and cooked broccoli. Eight men consumed 200 g of crushed broccoli, raw or cooked, with a warm meal in a randomized, free-living, open cross-over trial. Higher amounts of...
article 2008
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Schutte, M.E. (author), Alink, G.M. (author), Freidig, A.P. (author), Spenkelink, B. (author), Vaessen, J.C.H. (author), van de Sandt, J.J.M. (author), Groten, J.P. (author), Rietjens, I.M.C.M. (author), TNO Kwaliteit van Leven (author), KvL (author)
This study investigates whether the previous observation that quercetin increases the transport of PhIP through Caco-2 monolayers in vitro could be confirmed in an in vivo rat model. Co-administration of 1.45 μmol PhIP/kg bw and 30 μmol quercetin/kg bw significantly increased the blood AUC(0-8 h) of PhIP in rats to 131 ± 14% of the AUC(0-8 h)...
article 2008
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Chanteranne, B. (author), Branca, F. (author), Kardinaal, A. (author), Wahala, K. (author), Braesco, V. (author), Ladroite, P. (author), Brouns, F. (author), Coxam, V. (author), TNO Kwaliteit van Leven (author)
The estrogenic effects of soy isoflavones (IF) on symptoms of menopause are of particular interest. The aim of the present study was to improve compliance of IF in two IF-enriched foods providing the same IF circulating levels in postmenopausal women. Forty-two healthy postmenopausal women (mean age: 53.28 years) were recruited for a randomized,...
article 2008
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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
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van de Wiele, T.R. (author), Oomen, A.G. (author), Wragg, J. (author), Cave, M. (author), Minekus, M. (author), Hack, A. (author), Cornelis, C. (author), Rompelberg, C.J.M. (author), de Zwart, L.L. (author), Klinck, B. (author), van Wijnen, J. (author), Verstraete, W. (author), Sips, A.J.A.M. (author), TNO Kwaliteit van Leven (author)
This paper presents a multi-laboratory comparison study of in vitro models assessing bioaccessibility of soil-bound lead in the human gastrointestinal tract under simulated fasted and fed conditions. Oral bioavailability data from a previous human in vivo study on the same soil served as a reference point. In general, the bioaccessible lead...
article 2007
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van de Sandt, J.J.M. (author), Dellarco, M. (author), van Hemmen, J.J. (author), TNO Kwaliteit van Leven (author)
Exposure scenarios form an essential basis for chemical risk assessment reports under the new EU chemicals regulation REACH (Registration, Evaluation, Authorisation and restriction of Chemicals). In case the dermal route of exposure is predominant, information on both exposure and dermal bioavailability is necessary for a proper risk assessment....
article 2007
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Vermeulen, M. (author), van den Berg, R. (author), Freidig, A.P. (author), van Bladeren, P.J. (author), Vaes, W.H.J. (author), TNO Kwaliteit van Leven (author)
A high intake of cruciferous vegetables is associated with a reduced risk of cancer and cardiovascular diseases. This protective effect has been linked to isothiocyanates, enzymatic hydrolysis products of glucosinolates. In this study, the metabolic fate of glucosinolates and isothiocyanates after ingestion of 19 different cruciferous vegetables...
article 2006
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Brand, W. (author), Schutte, M.E. (author), Williamson, G. (author), van Zanden, J.J. (author), Cnubben, N.H.P. (author), Groten, J.P. (author), van Bladeren, P.J. (author), Rietjens, I.M.C.M. (author), TNO Kwaliteit van Leven (author)
The transcellular transport of ingested food ingredients across the intestinal epithelial barrier is an important factor determining bioavailability upon oral intake. This transcellular transport of many chemicals, food ingredients, drugs or toxic compounds over the intestinal epithelium can be highly dependent on the activity of membrane bound...
article 2006
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Finglas, P.M. (author), de Meer, K. (author), Molloy, A. (author), Verhoef, P. (author), Pietrzik, K. (author), Powers, H.J. (author), van der Straeten, D. (author), Jägerstad, M. (author), Varela-Moreiras, G. (author), van Vliet, T. (author), Havenaar, R. (author), Buttriss, J. (author), Wright, A.J.A. (author), TNO Kwaliteit van Leven (author)
In the past decade, the understanding of folate bioavailability, metabolism and related health issues has increased, but several problems remain, including the difficulty of delivering the available knowledge to the populations at risk. Owing to the low compliance of taking folic acid supplements, for example, among women of child-bearing age...
article 2006
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Schaafsma, G. (author), TNO Kwaliteit van Leven (author)
Protein Digestibility-Corrected Amino Score (PDCAAS) is discussed. PDCAAS is now widely used as a routine assay for protein quality evaluation, replacing the more traditional biological methods [e.g., measurement of the Protein Efficiency Ratio (PER) in rats]. PDCAAS is based on comparison of the essential amino acid content of a test protein...
article 2005
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de Jong, R.J. (author), Verwei, M. (author), West, C.E. (author), van Vliet, T. (author), Siebelink, E. (author), van den Berg, H. (author), Castenmiller, J.J.M. (author), TNO Kwaliteit van Leven (author)
Objective: The aim of this study was to investigate whether milk fortified with folic acid enhances the folate status of humans and whether the presence of folate-binding proteins (FBP) in pasteurised milk affects the bioavailability of folic acid from fortified milk. In untreated and pasteurised milk, folate occurs bound to FBP, while FBP is ...
article 2005
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de Boer, V.C.J. (author), Dihal, A.A. (author), van der Woude, H. (author), Arts, I.C.W. (author), Wolffram, S. (author), Alink, G.M. (author), Rietjens, I.M.C.M. (author), Keijer, J. (author), Hollman, P.C.H. (author), TNO Kwaliteit van Leven (author)
Quercetin is a dietary polyphenolic compound with potentially beneficial effects on health. Claims that quercetin has biological effects are based mainly on in vitro studies with quercetin aglycone. However, quercetin is rapidly metabolized, and we have little knowledge of its availability to tissues. To assess the long-term tissue distribution...
article 2005
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Fox, T.E. (author), van den Heuvel, E.G.H.M. (author), Atherton, C.A. (author), Dainty, J.R. (author), Lewis, D.J. (author), Langford, N.J. (author), Crews, H.M. (author), Luten, J.B. (author), Lorentzen, M. (author), Sieling, F.W. (author), van Aken-Schneyder, P. (author), Hoek, M. (author), Kotterman, M.J.J. (author), van Dael, P. (author), Firweather-Tail, S.J. (author), TNO Voeding Centraal Instituut voor Voedingsonderzoek TNO (author)
Objective: To measure the bioavailability of selenium from cooked and raw fish in humans by estimating and comparing apparent absorption and retention of selenium in biosynthetically labelled fish with labelled selenate and biosynthetically labelled selenium in brewers yeast. Design: The intervention study was a parallel, randomised, reference...
article 2004
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Markus, C.R. (author), Sierksma, A. (author), Verbeek, C. (author), van Rooijen, J.J.M. (author), Patel, H.J. (author), Brand, A.N. (author), Hendriks, H.F.J. (author), TNO Voeding (author)
Brain serotonin (5-HT) synthesis is controlled by nutrients that influence the availability of plasma tryptophan (Trp) as compared with the sum of the other large neutral amino acids (LNAA; Trp:LNAA). Alcohol consumption is found to change mood and performance and this might well be due to alterations in the plasma Trp:LNAA ratio and brain 5-HT....
article 2004
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Dominy, N.J. (author), Davoust, E. (author), Minekus, M. (author), TNO Voeding (author)
Despite occurring in a wide variety of taxa, deliberate soil consumption (geophagy) is a poorly understood behavior. In humans, geophagy is sometimes considered aberrant or a sign of metabolic dysfunction. However, geophagy is normally assigned an adaptive function in nonhuman primates and various other organisms. One hypothesis submits that...
article 2004
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Hoppe, P.P. (author), Krämer, K. (author), van den Berg, H. (author), Steenge, G. (author), van Vliet, T. (author), TNO Voeding (author)
Background: Bioavailability studies with lycopene have focused on natural sources. A synthetic source has recently become available. Aim of the study: To determine the relative bioavailabilities of synthetic and tomato-based lycopene in free living volunteers in a single-blind, randomized, placebo-controlled, parallel trial. Methods: Three...
article 2003
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Rhodes, L.E. (author), Shahbakhti, H. (author), Azurdia, R.M. (author), Moison, R.M.W. (author), Steenwinkel, M.J.S.T. (author), Homburg, M.I. (author), Dean, M.P. (author), McArdle, F. (author), Beijersbergen van Henegouwen, G.M.J. (author), Epe, B. (author), Vink, A.A. (author)
Dietary omega-3 polyunsaturated fatty acids (ω-3 PUFAs) protect against photocarcinogenesis in animals, but prospective human studies are scarce. The mechanism(s) underlying the photoprotection are uncertain, although ω-3 PUFAs may influence oxidative stress. We examined the effect of supplementation on a range of indicators of ultraviolet...
article 2003
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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
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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
Searched for: subject:"Biological%5C+Availability"
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