Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Onderzoek naar effecten van bepaalde stoffen op het alcoholslot
    Muilwijk, Mirthe ; Alewijn, M. ; Ruth, S.M. van - \ 2014
    RIKILT Wageningen UR (RIKILT-rapport 2014-013) - 54
    analytische scheikunde - alcoholinname - voedselproducten - non-food producten - in vivo experimenten - analytical chemistry - alcohol intake - food products - non-food products - in vivo experimentation
    Ieder jaar vallen er doden en gewonden in het verkeer bij ongevallen waarbij alcohol in het spel is. Het alcoholslotprogramma draagt bij aan het omlaag brengen van het aantal verkeersslachtoffers en is bedoeld voor bestuurders die met te veel alcohol op aan het verkeer hebben deelgenomen. Als onderdeel van het programma wordt een alcoholslot in het voertuig van deelnemers ingebouwd zodat zij leren omgaan met alcohol en verkeer. Bij toepassing van het alcoholslot kan het voertuig niet gestart worden voordat een geldige ademtest is afgelegd, ook kan onderweg door het apparaat om hertesten gevraagd worden. Omdat het alcoholslot mogelijk niet alleen het gebruik van ethanol detecteert maar ook melding zou kunnen geven na gebruik van andere stoffen is onderzoek gedaan naar het ontstaan van vals-positieve meetresultaten van het alcoholslot.
    Bioaffinity mass spectrometry for screening and identification of contaminants
    Aqai, P. - \ 2013
    Wageningen University. Promotor(en): Michel Nielen, co-promotor(en): Willem Haasnoot. - Wageningen : Wageningen UR - ISBN 9789461738042 - 199
    besmetters - massaspectrometrie - analytische scheikunde - contaminants - mass spectrometry - analytical chemistry

    Our environment is constantly threatened by large amounts and variations of man-made chemicals and natural substances. Parts of these substances accumulate and contaminate soil and surface water, affecting the organisms living in it and eventually contaminate the food chain. The European Union (EU) has imposed regulations and obliged EU member states to monitor for possible contaminants in the environment and food. For this, highly sophisticated mass spectrometry (MS) techniques, which can nowadays screen >100 contaminants in a single run, are applied. For rapid and inexpensive screening of contaminants, bioactivity-based screening assays are applied, however, identification of compounds based on their chemical-physical properties is not possible. As both methods cannot identify emerging and unknown bioactive contaminants, there is a need for new tools and concepts. In this thesis, new bioaffinity MS (BioMS) concepts, using an antibody, transport proteins and a receptor, are presented for the screening and identification of contaminants. In the first concept, monoclonal antibodies (Mabs) against ochratoxins were coupled to fluorescent labeled paramagnetic microbeads for high-throughput flow cytometric screening of ochratoxins in wheat and cereal. The identification of ochratoxins with nano-ultra performance liquid chromatography-quadrupole-time-of-flight-MS (nano-UPLC-Q-ToF-MS) was achieved in full scan accurate mass mode. In the second BioMS approach, the flow cytometer was replaced by UPLC-triple quadrupole (QqQ)-MS for rapid screening of thyroid transporter ligands. For this, thyroid transport protein transthyretin (TTR) was immobilized onto inexpensive non-colored paramagnetic microbeads and a stable isotopic thyroid hormone was used as label in the competitive inhibition format. For the identification of TTR-binding endocrine disrupting chemicals (EDCs) in process water and urine, nano-UPLC-Q-ToF-MS was used. In order to perform high-throughput screening, a microtiter plate-based high-throughput BioMS approach was developed with the same beads but coupled with recombinant human sex hormone-binding globulin (rhSHBG) for the detection of designer steroids in dietary supplements. Following the screening with rhSHBG-based BioMS using LC-QqQ-MS, the rhSHBG bioaffinity extracts were injected onto chip-UPLC-Q-ToF-MS operated in full scan mode and a wide range of steroids were identified. The same approach was applied with the estrogen receptor α (ERα) in which LC-QqQ-MS, instead of the commonly applied GC-MS, was used for the screening of estrogens with a suitable LC-MS-compatible label. The identification of estrogens in ERα-purified supplement extracts was achieved with UPLC-ion mobility (IM)-Q-ToF-MS. These new BioMS concepts present new tools for the screening and identification of emerging yet unknown food and environmental contaminants to ensure consumer’s health and fair play in sports.

    Sensing food fraud from analytical chemistry and criminological perspectives
    Ruth, S.M. van; Huisman, W. ; Luning, P.A. - \ 2013
    voedselveiligheid - authenticiteit - herkomst - analytische scheikunde - forensische wetenschap - food safety - authenticity - provenance - analytical chemistry - forensic science
    The joint investigation of analytical opportunities for authentication and understanding the influece of peoples’ motives and agri-food chain context characteristics on fraud, will provide input for a new approach towards fraud risks assessment for food industries and regulators.
    Adviesbasis voor de bemesting van akkerbouwgewassen : analysevoorschriften
    Haan, J.J. de; Geel, W.C.A. van - \ 2013 2013 (2013)20 maart.
    grondanalyse - analytische methoden - bemesting - analytische scheikunde - akkerbouw - soil analysis - analytical methods - fertilizer application - analytical chemistry - arable farming
    Voorschriften voor de grondanalyse op pH, stikstof, kalium, fosfaat, magnesium, koper, borium en mangaan.
    Animal feedingstuffs - determination of hydrocyanic acid by HPLC: results of the collaborative study : mandate 382 to CEN/TC 327
    Beek, W.M.J. ; Jong, J. de - \ 2011
    Wageningen : RIKILT (Report / RIKILT 2011.001) - 38
    waterstofcyanide - hplc - voer - analytische scheikunde - hydrogen cyanide - hplc - feeds - analytical chemistry
    Dioxin monitoring in fats oils for the feed industry
    Asselt, E.D. van; Sterrenburg, P. - \ 2011
    Wageningen : Rikilt - Institute of Food Safety (Report / RIKILT, Institute of Food Safety 2011.004) - 37
    dioxinen - monitoring - vetten - oliën - veevoederindustrie - analytische scheikunde - productieprocessen - voedselveiligheid - dioxins - monitoring - fats - oils - feed industry - analytical chemistry - production processes - food safety
    The aim of the present project was to determine the most critical steps in the production of fats and oils. First, production processes of vegetables oils, animal fat, fish oil, biodiesel and fat blending were studied and experts from the industry as well as in-house dioxin experts were consulted to identify the most critical steps. Then, monitoring data for vegetable oil, animal fat and fish oil were analysed to determine which products have an increased risk of dioxin contamination.
    Report PCDD/Fs and PCBs : CEN Ring trial 2010 : animal feed ring trial on determination of PCDD/Fs and PCBs in animal feed, fat/oil
    RIKILT, - \ 2010
    Freiburg : European Union Reference Laboratory for Dioxins and PCBs in Feed and Food - 17
    kwaliteitsnormen - kwaliteitscontroles - analytische scheikunde - polychloordibenzodioxinen - polychloordibenzofuranen - polychloorbifenylen - quality standards - quality controls - analytical chemistry - polychlorinated dibenzodioxins - polychlorinated dibenzofurans - polychlorinated biphenyls
    National Reference Laboratory dioxins, PCB's, polycyclic aromatic hydrocarbons, heavy metals, pesticides and mycotoxins in feed and animal products : annual report 2007
    Traag, W.A. ; Mol, J.G.J. ; Hoogenboom, L.A.P. - \ 2008
    Wageningen : RIKILT (Report / RIKILT, Institute of Food Safety 2008.011) - 36
    analytische methoden - referentienormen - dioxinen - zware metalen - pesticiden - mycotoxinen - kwaliteitscontroles - polycyclische aromatische koolwaterstoffen - analytische scheikunde - analytical methods - reference standards - dioxins - heavy metals - pesticides - mycotoxins - quality controls - polycyclic aromatic hydrocarbons - analytical chemistry
    Speuren naar onbekende contaminanten in de voedselketen
    Nielen, M.W.F. - \ 2008
    Wageningen : Wageningen Universiteit - ISBN 9789085852704 - 27
    analytische methoden - voedselbesmetting - gc-ms - analytische scheikunde - analytical methods - food contamination - gc-ms - analytical chemistry
    Annual report of the Dutch National Reference Laboratory for animal proteins 2007
    Raamsdonk, L.W.D. van; Vliege, J.J.M. ; Pinckaers, V.G.Z. ; Hekman, W.E. ; Ruth, S.M. van - \ 2008
    Wageningen : RIKILT Wageningen UR (Report RIKILT 2008.005) - 19 p.
    dierlijke eiwitten - voer - referentienormen - kwaliteitscontroles - analytische methoden - analytische scheikunde - animal proteins - feeds - reference standards - quality controls - analytical methods - analytical chemistry
    New methods for the screening of antioxidants in three Sideritis species
    Koleva, I. - \ 2007
    Wageningen University. Promotor(en): Aede de Groot, co-promotor(en): Teris van Beek; Jozef Linssen. - [S.l.] : S.n. - ISBN 9789085046851 - 197
    antioxidanten - sideritis - chemische samenstelling - hplc - gaschromatografie - analytische scheikunde - antioxidants - sideritis - chemical composition - hplc - gas chromatography - analytical chemistry
    This thesis describes the rapid and robust evaluation of antioxidant activity of complex mixtures such as plant extracts. The study was directed to establish the best screening and isolation procedures for components with antioxidative properties to ensure the development of an “algorithm” for studying natural antioxidants. Three different screening methods (the b-carotene bleaching test (BCBT), the headspace GC method (HS-GC) and the off-line radical scavenging assay with the DPPH radical (DPPH method) and various extraction schemes were used. Three plants from the genus Sideritis grown in Bulgaria (S. scardica, S. syriaca and S. montana) served as test species. The strengths and limitations of each method were illustrated by testing a number of extracts of different polarity. A novel HPLC-DPPH method to rapidly and sensitively pinpoint individual antioxidants in complex mixtures with as little as possible fractionation procedures was developed. The use of the alternative ABTS·+ radical cation made the method in most cases even more sensitive. The instrumental set-up and physico-chemical parameters of both methods were studied. The methods were successful for qualitative and semi-quantitative measurements of pure antioxidants and extracts. A review is under preparation on the use of on-line methods. As a result, a range of flavonoid-, phenylpropanoid- and iridoid glycosides were isolated. The radical scavenging activity of the isolated compounds by off- and on-line DPPH methods was studied. Three novel compounds were isolated: flavonoid glycosides luteolin-4'-methylether-7-O-[6'''-O-acetyl-β-D-allopyranosyl-(1-2)-β-D-glucopyranoside and hypolaetin-4'-methylether-7-O-[β-D-allopyranosyl-(1-2)-6''-O-acetyl-β-D-glucopyranoside, and iridoid glycoside 3''-O-p-coumaroyl-6''-O-acetyl melittoside from Sideritis species. Preliminary studies by the HS-GC method were applied to investigate how Sideritis extracts and pure components would behave in real systems: bulk oils and oil-in-water emulsions. Conjugated dienes and hexanal formation were monitored using rosmarinic acid and BHT as standards. They showed good inhibitory effects with regard to dienes and hexanal formation in both test systems.
    Environmental Levels and Trends of 1,2-dichloroethane, vinyl chloride and chloroform in water, sediment and biota for the European and Arctic regions: literature study
    Korytar, P. ; Leslie, H.A. - \ 2005
    IJmuiden : RIVO (Report / RIVO-Netherlands Institute for Fisheries Research C085/05) - 35
    ethyleendichloride - polyvinylchloride - chloroform - aquatisch milieu - arctia - europa - literatuuroverzichten - analytische scheikunde - ethylene dichloride - poly(vinyl chloride) - chloroform - aquatic environment - arctia - europe - literature reviews - analytical chemistry
    Data on concentrations of chloroform, 1,2-dichloroethane and vinyl chloride in European and Arctic waters, sediments and biota were collected from scientific literature and monitoring programmes for the period 1980–2005 and are presented in this report.
    Vissen in troebel water: over identificeren en kwantificeren van milieuverontreinigende stoffen
    Boer, J. de - \ 2005
    Wageningen : Wageningen Universiteit - 31
    toxische stoffen - verontreinigingsbeheersing - toxicologie - openbare redes - analytische scheikunde - xenobiotica - ecotoxicologie - toxic substances - pollution control - toxicology - public speeches - analytical chemistry - xenobiotics - ecotoxicology
    Rede bij aanvaarding van ambt van persoonlijk hoogleraar analytische chemie
    De vergelijking van vijf sulfonamide referentiematerialen van RIKILT en Laboratorium VWA/RVV
    Berendsen, B.J.A. ; Assink, P.J. ; Rhijn, J.A. van - \ 2005
    onbekend : RIKILT - Analyse & Ontwikkeling (Rapport / RIKILT 2005.002) - 9
    sulfonamiden - kwaliteitscontroles - referentienormen - kennis - analytische scheikunde - sulfonamides - quality controls - reference standards - knowledge - analytical chemistry
    Analysis of TBBP-A and HBCD in human blood
    Leslie, H.A. ; Micic, D. ; Brandsma, S.H. ; Hesselingen, J.M. van; Kwadijk, C.J.A.F. ; Leonards, P.E.G. ; Boer, J. de - \ 2004
    IJmuiden : RIVO (RIVO report C009/04) - 13
    analytische methoden - bloed - broomhoudende vlamvertragers - analytische scheikunde - analytical methods - blood - brominated flame retardants - analytical chemistry
    The brominated flame retardants, hexabromocyclododecane (HBCD) and tetrabromobisphenyl-A (TBBP-A) were analysed in samples of human blood from 40 different individuals. In only one individual was HBCD detected. In about half of the individuals, TBBP-A was detected. When they were detected, the amounts of both chemicals were near the limits of quantification. That the chemicals were detected confirms that certain individuals were exposed to sources of these substances. The toxicological implications of these low levels are not well known. Very few studies of the toxicology of these compounds have been performed to date.
    Survey of existing measured concentration data for 1,1-dichloroethene, 2,4-dichlorophenol and monochloromethane in water, sediment and aquatic biota
    Leonards, P.E.G. ; Leslie, H.A. - \ 2004
    onbekend : RIVO Milieu en Voedselveiligheid (Report / RIVO-Netherlands Institute for Fisheries Research C087/04) - 9
    ethyleendichloride - 2,4-dichloorfenol - methaan - derivaten - aquatisch milieu - risicoschatting - analytische scheikunde - ethylene dichloride - 2,4-dichlorophenol - methane - derivatives - aquatic environment - risk assessment - analytical chemistry
    Tetracycline standaardvergelijking RIKILT-LRVV
    Berendsen, B.J.A. ; Rhijn, J.A. van; Giesenaar, E.O. - \ 2004
    Wageningen : RIKILT (Rapport / RIKILT 2004.010) - 8
    tetracycline - referentienormen - analytische scheikunde - tetracycline - reference standards - analytical chemistry
    Adducten van nitrofuranen: metabolisme, uitscheidingskinetiek en analytiek
    Zuidema, T. - \ 2003
    Wageningen : RIKILT (Rapport / RIKILT 2003.022) - 56
    nitrofuranen - derivaten - vleeskuikens - blootstelling - metabolisme - furazolidon - in vitro - heterocyclische verbindingen - analytische scheikunde - nitrofurans - derivatives - broilers - exposure - metabolism - furazolidone - in vitro - heterocyclic compounds - analytical chemistry
    Resultaten ringtest 2002 zware metalen en arseen in twee monsters compost in het kader van de regeling "Bemonstering en analyse overige organische meststoffen" (BOOM)
    Polanen, A. van; Oostrom, J.J. van; Driessen, J.J.M. - \ 2002
    Wageningen : RIKILT, Instituut voor Voedselveiligheid (Rapport / RIKILT 2002.011) - 16
    zware metalen - arsenicum - organisch afval - monsterverwerking - compost - kwaliteitscontroles - analytische scheikunde - heavy metals - arsenic - organic wastes - sample processing - composts - quality controls - analytical chemistry
    Ontwikkeling, optimalisatie en validatie van de screeningsmethode op residuen van quinolonen en tetracyclines in pluimveevlees
    Egmond, H.J. van - \ 2001
    Wageningen : Rijks-Kwaliteitsinstituut voor Land- en Tuinbouwprodukten (Rapport / RIKILT 2001.002) - 34
    pluimveevlees - kalkoenvlees - monstervoorbehandeling - bemonsteren - optimalisatie - tetracyclines - doxycycline - screenen - chemische analyse - analytische scheikunde - poultry meat - turkey meat - sample pretreatment - sampling - optimization - tetracyclines - doxycycline - screening - chemical analysis - analytical chemistry
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