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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    NON-SMOKY GLYCOSYLTRANSFERASE1 Prevents the Release of Smoky Aroma from Tomato Fruit
    Tikunov, Y.M. ; Molthoff, J.W. ; Vos, R.C.H. de; Beekwilder, M.J. ; Houwelingen, A.M.M.L. van; Hooft, J.J.J. van der; Nijenhuis-de Vries, M.A. ; Labrie, C.W. ; Verkerke, W. ; Geest, H.C. van de; Víquez Zamora, A.M. ; Presa, S. ; Rambla Nebot, J.L. ; Granell, A. ; Hall, R.D. ; Bovy, A.G. - \ 2013
    The Plant Cell 25 (2013)8. - ISSN 1040-4651 - p. 3067 - 3078.
    mass spectrometry - small molecules - salicylic-acid - key enzyme - flavor - volatiles - biosynthesis - components - odor - gene
    Phenylpropanoid volatiles are responsible for the key tomato fruit (Solanum lycopersicum) aroma attribute termed “smoky.” Release of these volatiles from their glycosylated precursors, rather than their biosynthesis, is the major determinant of smoky aroma in cultivated tomato. Using a combinatorial omics approach, we identified the NON-SMOKY GLYCOSYLTRANSFERASE1 (NSGT1) gene. Expression of NSGT1 is induced during fruit ripening, and the encoded enzyme converts the cleavable diglycosides of the smoky-related phenylpropanoid volatiles into noncleavable triglycosides, thereby preventing their deglycosylation and release from tomato fruit upon tissue disruption. In an nsgt1/nsgt1 background, further glycosylation of phenylpropanoid volatile diglycosides does not occur, thereby enabling their cleavage and the release of corresponding volatiles. Using reverse genetics approaches, the NSGT1-mediated glycosylation was shown to be the molecular mechanism underlying the major quantitative trait locus for smoky aroma. Sensory trials with transgenic fruits, in which the inactive nsgt1 was complemented with the functional NSGT1, showed a significant and perceivable reduction in smoky aroma. NSGT1 may be used in a precision breeding strategy toward development of tomato fruits with distinct flavor phenotypes.
    FoodBattle : reductie milieudruk voedselverspilling op het snijvlak van supermarkt & consument
    Bos-Brouwers, H.E.J. ; Scheer, F.P. ; Nijenhuis, M.A. ; Kleijn, F. ; Westerhoff, M. - \ 2013
    Wageningen : Food & Biobased Research Wageningen UR - 101
    voedselverspilling - consumentengedrag - voedselafval - reductie - gedrag van huishoudens - consumenten - supermarkten - food wastage - consumer behaviour - food wastes - reduction - household behaviour - consumers - supermarkets
    Huishoudens die bijhouden hoeveel eten ze weggooien en gestimuleerd worden om verspilling te beperken, brengen hun voedselverspilling binnen 3 weken met gemiddeld 20 procent terug. Dat blijkt uit een proef met zogenaamde Food Battles in Apeldoorn, Lochem, Brummen en Eerbeek.
    Effect of a holistic meal and ambiance concept on main meal enjoyment and food intake of Dutch nursing home residents: A pilot study
    Kremer, S. ; Derks, J. ; Nijenhuis, M.A. ; Boer, E. ; Gorselink, M. - \ 2012
    Journal of Aging Research & Clinical Practice 1 (2012). - p. 237 - 244.
    Objectives: To explore whether or not the implementation of a holistic meal and ambiance concept has the potential to increase the meal enjoyment and/or influence food intake of the elderly in nursing homes who already eat in a social setting. Design: In a longitudinal design two groups of subjects (comparison group & experimental group) participated in a 12-week study encompassing an 8-week intervention. In the first four weeks, all residents consumed their normal main meals in the usual setting. In the following eight weeks, the intervention was applied to the experimental group (n=28). The comparison group (n=40) received no intervention. Both groups were interviewed twice (in week 4 and 12). Setting: Real-life setting (Dutch nursing homes). Subjects: Sixty-eight long-term nursing home residents with primarily somatic disorders. Results: The total amount of energy intake for the main meal showed no significant difference between the experimental and comparison group. However, in the experimental group a significant higher intake of vegetables, starch and applesauce and a lower intake of sauce was observed as well as an increased duration of the meal. The meal enjoyment was improved for the items time spent at the table and satisfaction with the amount of food. Conclusions: Within 8 weeks of intervention, duration of the meal, meal enjoyment and to a lesser extent food intake of nursing home residents can already be influenced. These influences were already achieved in a relative short time, which is promising for the long term.
    Upgrading the tomato flavour model and the role of different pathways (TO I)
    Verkerke, W. ; Nijenhuis-de Vries, M.A. - \ 2010
    Wageningen : Centre for Biosystems Genomics
    CO2-labeling van voeding : (hoe) kan de consument rekening houden met klimaatgevolgen van de aankoop van voedingsmiddelen
    Nijenhuis, L. ; Waart, S. de; Timmermans, A.J.M. ; Eppink, M.M. ; Rosekrans, W. ; Dutilh, C. - \ 2008
    Amsterdam : Stichting DuVO - 24 p.
    Indicatief consumentenonderzoek naar zuiveldesserts : vruchtenyoghurt en vanillevla met en zonder biologische claim
    Nijenhuis-de Vries, M.A. ; Holthuysen, N.T.E. ; Mojet, J. - \ 2008
    Wageningen : Agrotechnology & Food Sciences Group (Rapport / Agrotechnology & Food Sciences Group nr. 906) - 61
    biologische voedingsmiddelen - melkproducten - sensorische evaluatie - organic foods - milk products - sensory evaluation
    Met behulp van een indicatief consumentenonderzoek is getracht een antwoord te vinden op de vragen: - Kan er een optimum gevonden worden voor een aantal sensorische aspecten in vruchtenyoghurt en vla (met name voor zoetheid, romigheid en dikte)? - Welke invloed heeft de claim “biologisch” op de perceptie? - Is er verschil in perceptie tussen ‘reguliere’ en ‘biologische’ consumenten?
    Exploring cracks, of breads and snacks
    Dijksterhuis, G.B. ; Luyten, J.M.J.G. ; Nijenhuis-de Vries, M.A. - \ 2006
    Selection of panellists with a modified ETOC test
    Holthuysen, N.T.E. ; Nijenhuis-de Vries, M.A. ; Mojet, J. - \ 2006
    Regulation and role of differential ethylene biosynthesis in gravistimulated Antirrhinum majus L. cut flower stems
    Woltering, E.J. ; Balk, P.A. ; Nijenhuis-de Vries, M.A. ; Faivre, M. ; Ruys, G. ; Somhorst, D. ; Philosoph-Hadas, S. ; Friedman, H. - \ 2005
    Acta Horticulturae (2005)669. - ISSN 0567-7572 - p. 213 - 218.
    Gravistimulation induced differential ethylene production in Antirrhinum majus L. cut flower stems with highest levels in the lower halves of the gravistimulated stems. Expression levels of three different 1-aminocyclopropane-1-carboxylate (ACC) synthase (ACS) genes, an ACC oxidase (ACO) and an ethylene receptor (ETR/ERS homolog) gene were studied in the bending zone after 9 h of gravistimulation. One of the ACS genes (Am-ACS3) was abundantly expressed in the lower halves but not in the upper halves of gravistimulated stems. This strongly suggests that Am-ACS3 is responsible for the observed differential ethylene production in gravistimulated stems. Am-ACO and Am-ETR/ERS gene expression was increased in both the lower and upper halves of gravistimulated stems, suggesting that they play no role in differential ethylene production. When gravistimulation was performed in an environment enriched with either 20 µL/L ethylene or 100 nL/L 1-methylcyclopropene (1-MCP), a slight stimulation of bending by 1-MCP and a slight inhibition of bending by ethylene were observed. The regulation and role of ethylene in gravitropism of cut snapdragon flowering stems is discussed.
    An auxin-responsive 1-aminocyclopropane-1-carboxylate synthase is responsible for differential ethylene production in gravistimulated Antirrhinum majus L. flower stems
    Woltering, E.J. ; Balk, P.A. ; Nijenhuis-de Vries, M.A. ; Faivre, M. ; Ruys, G. ; Somhorst, B.P.M. ; Philosoph-Hadas, S. ; Friedman, H. - \ 2005
    Planta 220 (2005)3. - ISSN 0032-0935 - p. 403 - 413.
    gravitropic response - arabidopsis-thaliana - snapdragon spikes - dandelion peduncles - inflorescence stems - gene family - cell-death - tomato - growth - biosynthesis
    The regulation of gravistimulation-induced ethylene production and its role in gravitropic bending was studied in Antirrhinum majus L. cut flower stems. Gravistimulation increased ethylene production in both lower and upper halves of the stems with much higher levels observed in the lower half. Expression patterns of three different 1-aminocyclopropane-1-carboxylate (ACC) synthase (ACS) genes, an ACC oxidase (ACO) and an ethylene receptor (ETR/ERS homolog) gene were studied in the bending zone of gravistimulated stems and in excised stem sections following treatment with different chemicals. One of the ACS genes (Am-ACS3) was abundantly expressed in the bending zone cortex at the lower side of the stems within 2 h of gravistimulation. Am-ACS3 was not expressed in vertical stems or in other parts of (gravistimulated) stems, leaves or flowers. Am-ACS3 was strongly induced by indole-3-acetic acid (IAA) but not responsive to ethylene. The Am-ACS3 expression pattern strongly suggests that Am-ACS3 is responsible for the observed differential ethylene production in gravistimulated stems; its responsiveness to IAA suggests that Am-ACS3 expression reflects changes in auxin signalling. Am-ACS1 also showed increased expression in gravistimulated and IAA-treated stems although to a much lesser extent than Am-ACS3. In contrast to Am-ACS3, Am-ACS1 was also expressed in non-bending regions of vertical and gravistimulated stems and in leaves, and Am-ACS1 expression was not confined to the lower side cortex but evenly distributed over the diameter of the stem. Am-ACO and Am-ETR/ERS expression was increased in both the lower and upper halves of gravistimulated stems. Expression of both Am-ACO and Am-ETR/ERS was responsive to ethylene, suggesting regulation by IAA-dependent differential ethylene production. Am-ACO expression and in vivo ACO activity, in addition, were induced by IAA, independent of the IAA-induced ethylene. IAA-induced growth of vertical stem sections and bending of gravistimulated flowering stems were little affected by ethylene or 1-methylcyclopropene treatments, indicating that the differential ethylene production plays no pivotal role in the kinetics of gravitropic bending.
    Discovery and in vivo evaluation of new melanocortin-4 receptor-selective peptides
    Nijenhuis, W.A.J. ; Kruijtzer, J.A.W. ; Wanders, N. ; Vrinten, D.H. ; Garner, K.M. ; Schaaper, W.M.M. ; Meloen, R.H. ; Gispen, W.H. ; Liskamp, R.M. ; Adan, R.A.H. - \ 2003
    Peptides 24 (2003)2. - ISSN 0196-9781 - p. 271 - 280.
    melanocyte-stimulating hormone - alpha-melanotropin action - agouti-related protein - evaluation in-vitro - biological evaluation - molecular-cloning - inverse agonist - msh analogs - amino-acid - rat
    The melanocortin-4 receptor (MC4R) is involved in several physiological processes, including body weight regulation and grooming behaviour in rats. It has also been suggested that the MC4R mediates the effects of melanocortin ligands on neuropathic pain. Selective compounds are needed to study the exact role of the MC4R in these different processes. We describe here the development and evaluation of new melanocortin compounds that are selective for the MC4R as compared with the other centrally expressed receptors, MC3R and MC5R. First, a library of 18 peptides, in which a melanocortin-based sequence was systematically point-mutated, was screened for binding to and activity on the MC3R, MC4R and MC5R. Compound Ac-Nle-Gly-Lys-Image-Phe-Arg-Trp-Gly-NH2 (JK1) appeared to be the most selective MC4R compound, based on affinity. This compound is 90- and 110-fold selective for the MC4R as compared to the MC3R and MC5R, respectively. Subsequent modification of JK1 yielded compound Ac-Nle-Gly-Lys-Image-Nal(2)-Arg-Trp-Gly-NH2 (JK7), a selective MC4R antagonist with 34-fold MC4R/MC3R and 109-fold MC4R/MC5R selectivity. The compounds were active in vivo as determined in a grooming assay and a model for neuropathic pain in rats. Intravenous (i.v.) injections suggested that they were able to pass the blood¿brain barrier. The compounds identified here will be useful in further research on the physiological roles of the MC4R.
    Applied genomics: an innovative tool to improve quality in chains: Predicting mealiness in apples - a case study
    Wordragen, M. van; Balk, P.A. ; Hall, R.D. ; Nijenhuis-de Vries, M.A. ; Broeck, H.C. van den; Vorst, O.F.J. ; Poelman, A.A.M. - \ 2003
    Acta Horticulturae 604 (2003)1. - ISSN 0567-7572 - p. 387 - 394.
    voedselkwaliteit - appels - voedselopslag - identificatie - agro-industriële ketens - ketenmanagement - genexpressieanalyse - food quality - apples - food storage - identification - agro-industrial chains - supply chain management - genomics
    Genomics technologies can be applied for unravelling the biological processes that are important for pre- and post-harvest quality. Such knowledge will allow precise monitoring of physiological condition and can be used as a tool for optimising production chains. A combination with quality change models will allow prediction of future product quality with much more precision and certainty than is currently possible. To demonstrate the validity of this approach we set up a project to identify, via cDNA microarray analysis, gene expression patterns that are correlated to the development of mealiness during storage of Cox apples (Malus x domestica `Cox¿s Orange Pippin¿). The experimental set-up encompassed, next to mRNA profiling, both instrumental and sensory analyses of apples at various time points before and during storage. We were able to select a subset of genes the expression of which is indicative of reduced sensory quality (mealiness and off-flavour). Moreover we detected batch differences in initial profiles that could be related to storage quality. Such indicators can be used as decision support tools for growers and traders.
    Transmission of strawberry odour to mushrooms due to joint storage and transport
    Poelman, A.A.M. ; Nijenhuis - de Vries, M.A. ; Mojet, J. - \ 2002
    Wageningen : ATO B.V. Agrotechnological Research Institute - 9
    Distributie trostomaat verbeteren door ketenbenadering : rapportage van het in 2000 verrichte onderzoek
    Boerrigter, H.A.M. ; Boogaard, G.J.P.M. van den; Harkema, H. ; Holthuysen, N.T.E. ; Leeuw, P.L.A. de; Nijenhuis, M.A. ; Wild, J.P.J. de - \ 2001
    Wageningen : Agrotechnologisch Onderzoek Instituut (ATO-DLO) (Rapport / Instituut voor Agrotechnologisch Onderzoek, Dienst Landbouwkundig Onderzoek (ATO-DLO) B492) - 54
    Land cover monitoring; an approach towards pan European land cover classification and change detection
    Boer, M.E. de; Vente, J. de; Mücher, C.A. ; Nijenhuis, W.A.S. ; Thunnissen, H.A.M. - \ 2000
    Delft : BCRS (NRSP-2 Report 00-18) - 110
    remote sensing - landevaluatie - grondbedekking - verandering - detectie - landclassificatie - terreinclassificatie - europa - remote sensing - land evaluation - ground cover - change - detection - land classification - terrain classification - europe
    Synthesis and characterization of novel side-chain liquid crystalline polycarbonates, 5 - Mesophase characterization of side-chain liquid crystalline polycarbonates with tails of different lengths
    Jansen, J.C. ; Addink, R. ; Nijenhuis, K.T. ; Mijs, W.J. - \ 1999
    Macromolecular Chemistry and Physics 200 (1999)6. - ISSN 1022-1352 - p. 1473 - 1484.
    The mesomorphic properties and thermal stability of side-chain LC polycarbonates with alkoxyphenyl benzoate side groups having a short spacer and alkoxy tails ranging from 1 to 8 carbon atoms were studied by DSC, X-ray diffraction and polarized light optical microscopy. All polymers have a smectic A structure. Mesogens having short tails organize preferably in a monolayer structure, and mesogens having long tails in a double layer structure. A sharp increase in the clearing temperatures and enthalpies as a function of tail length was observed. No clear relation between the tail length and the glass transition temperature was found. Both the Tg and the clearing temperature show a strong dependence on the molecular weight. Up to about M̄w = 20000 a rapid increase in phase transition temperatures with increasing molecular weight was observed, eventually levelling off to a constant maximum value. The LC polycarbonates were found to be thermally stable up to about 200°C. At higher temperatures, random chain scission, resulting in a rapid decrease in molecular weight, and unzipping, resulting in the formation of a five-membered cyclic carbonate, are the main initial degradation mechanisms. The degraded polymers have lower transition temperatures than the original ones.
    Synthesis and characterization of novel side-chain liquid crystalline polycarbonates, 4 - Synthesis of side-chain liquid crystalline polycarbonates with mesogenic groups having tails of different lengths
    Jansen, J.C. ; Addink, R. ; Nijenhuis, K.T. ; Mijs, W.J. - \ 1999
    Macromolecular Chemistry and Physics 200 (1999)6. - ISSN 1022-1352 - p. 1407 - 1420.
    Side-chain liquid crystalline polycarbonates with alkoxyphenylbenzoate side groups, having a short spacer and tails ranging from 1 to 8 C-atoms, were synthesized. The polymers were prepared by an organo-zinc catalysed copolymerization of carbon dioxide and mesogenic 4-alkoxyphenyl 4-(2,3-epoxypropoxy)benzoates. Model polycarbonates were prepared by copolymerization of glycidyl phenyl ether (GPE) and carbon dioxide and by terpolymerization of GPE, propylene oxide and CO2. The copolymerizations of LC monomers were carried out at 70°C in an autoclave at 60 atm CO2 pressure in dioxane as the solvent. Catalysts based on diethylzinc and water or diethylzinc and resorcinol were used. High catalyst concentrations (up to 20 mol-% on the basis of diethylzinc with respect to epoxide) and long reaction times (72 h) were found to be necessary for acceptable yields and reasonable molar masses. The resulting polymers had a high polydispersity and the maximum yield was about 30%. A major side product, formed directly from CO2 and epoxide, as well as indirectly by depolymerization, was the corresponding five-membered cyclic carbonate. The polymers on average contained about 30 mol-% of ether units and 70 mol-% of carbonate units due to a weak tendency of the epoxides to undergo homopolymerization. 1H and 13C NMR analysis revealed detailed information about the overall ether content and the distribution of the ether and carbonate groups in the chain, as well as the tacticity of the polymers. Surprisingly, the monomer distribution and the tacticity were molecular weight dependent. Some possible explanations for these phenomena are suggested.
    Regulation of ethylene biosynthesis in gravi-responding snapdragon flower stems
    Nijenhuis-de Vries, M.A. ; Faivre, M. ; Somhorst, D. ; Hoeberichts, F.A. ; Woltering, E.J. - \ 1998
    Characterisation of a manganese-reducing, toluene-degrading enrichment culture.
    Langenhoff, A.A.M. ; Nijenhuis, I. ; Tan, N.C.G. ; Briglia, M. ; Zehnder, A.J.B. ; Schraa, G. - \ 1997
    FEMS microbiology ecology 24 (1997). - ISSN 0168-6496 - p. 113 - 125.
    Radio telemetry system for continuous measurement of movement and temperature in animals
    Cats, T.A.J. ; Jansen, M.B. ; Nijenhuis, P.J. - \ 1996
    In: Proceedings of the 13th International Symposium on Biotelemetry, March 26-31 1995, Williamsburg, Virginia U.S.A - p. 292 - 298.
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