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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    Combining Accelerometry and GPS to Assess Neighborhood-Based Physical Activity: Associations With Perceived Neighborhood Walkability
    Stappers, N.E.H. ; Schipperijn, J. ; Kremers, S.P.J. ; Bekker, M.P.M. ; Jansen, M.W.J. ; Vries, N.K. De; Kann, D.H.H. Van - \ 2020
    Environment and Behavior (2020). - ISSN 0013-9165
    This study explored associations between perceived neighborhood walkability and neighborhood-based physical activity (NB-PA) and assessed possible moderation effects of the amount of time spent in the home neighborhood and individual characteristics (i.e., educational level and health-related problems). In 2016 to 2017, 509 Dutch adults, living in the South Limburg area, were included. Context-specific PA levels were measured using the Actigraph GT3X+ accelerometer and the Qstarz BTQ1000XT GPS-logger. Perceived neighborhood walkability, level of education, work status, and health-related quality of life were measured with validated self-report instruments. Results showed that individuals with a lower level of education or health-related problems spent more time in the home neighborhood. The perceived neighborhood walkability only affected NB-PA for individuals spending a relatively large amount of time in their home neighborhood. PA-facilitating features in the home neighborhood, for example, aesthetics, were only associated with more NB-PA for individuals without health-related problems or with a higher level of education.
    The role of context in evaluation studies: Lessons from a process evaluation of integrating health in urban reconstruction
    Stappers, N.E.H. ; Kann, D.H.H. Van; Jansen, M.W.J. ; Kremers, S.P.J. ; Vries, N.K. De; Bekker, M.P.M. - \ 2020
    Environmental Impact Assessment Review 82 (2020). - ISSN 0195-9255
    Highlights
    Project implementation poses crucial conditions to achieving the intended outcomes.
    Political agency influences goal achievement and should be incorporated into CICI.
    Design and implementation depend on context, which co-evolve over time.
    The distinction between intervention and context is analytical and affects validity.

    Co-creation of tourism knowledge
    Ren, Carina ; Duim, V.R. van der; Jóhannesson, Gunnar Thór - \ 2018
    In: Co-Creating Tourism Research / Ren, Carina, Jóhannesson, Gunnar Thór, van der Duim, René, Routledge - ISBN 9781138228191 - p. 1 - 10.
    Co-creation has become a buzzword in many social science disciplines and business studies as well as in the field of tourism studies. Everybody is supposed to work together to create ‘more value’, ‘better experiences’ and to enhance knowledge transfer. While no exact or clear-cut definition exists of co-creation, it often refers to ways in which producers and consumers of a particular product or service jointly produce it partly or in whole. In the private sector, it denotes a shift in the organization of production where consumers or users are enabled or encouraged to participate in the making of a product or experience as in the case of tourism. In design studies it has been used in a similar sense to reflect on and work with the relation between designers and end users (Sanders & Stappers, 2008; see also Chapter 6).
    Genetic variation in TLR10 is not associated with chronic Q fever, despite the inhibitory effect of TLR10 on Coxiella burnetii-induced cytokines in vitro
    Ammerdorffer, Anne ; Stappers, Mark H.T. ; Oosting, Marije ; Roest, Hendrik Jan - \ 2016
    Cytokine 77 (2016). - ISSN 1043-4666 - p. 196 - 202.
    Coxiella burnetii - Innate immunity - Q fever - Single nucleotide polymorphism - Toll-like receptor 10

    Coxiella burnetii, the causative agent of Q fever, is recognized by TLR2. TLR10 can act as an inhibitory receptor on TLR2-derived immune responses. Therefore, we investigated the role of TLR10 on C. burnetii-induced cytokine production and assessed whether genetic polymorphisms in TLR10 influences the development of chronic Q fever. HEK293 cells, transfected with TLR2, TLR10 or TLR2/TLR10, and human peripheral blood mononuclear cells (PBMCs) in the presence of anti-TLR10, were stimulated with C. burnetii. In both assays, the absence of TLR10 resulted in increased cytokine responses after C. burnetii stimulation. In addition, the effect of single nucleotide polymorphisms (SNPs) in TLR10 was examined in healthy volunteers whose PBMCs were stimulated with C. burnetii Nine Mile or the Dutch outbreak isolate C. burnetii 3262. Individuals bearing SNPs in TLR10 displayed increased cytokine production upon C. burnetii 3262 stimulation. Furthermore, 139 chronic Q fever patients and 220 controls were genotyped for TLR10 N241H, I775V and I369L. None of these polymorphisms were associated with increased susceptibility to chronic Q fever. In conclusion, TLR10 has an inhibitory effect on in vitro cytokine production by C. burnetii, but the presence of TLR10 polymorphisms does not lead to an increased risk of developing chronic Q fever.

    Effects of alginate and resistant starch on feeding patterns, behaviour and performance in ad libitum-fed growing pigs
    Souza Da Silva, C. ; Bosch, G. ; Bolhuis, J.E. ; Stappers, L.J.N. ; Hees, H.M.J. van; Gerrits, W.J.J. ; Kemp, B. - \ 2014
    Animal 8 (2014)12. - ISSN 1751-7311 - p. 1917 - 1927.
    satiety-related hormones - adult female pigs - dietary fiber - food-intake - nonstarch polysaccharides - energy-metabolism - physical-activity - appetite regulation - body-composition - potato starch
    This study assessed the long-term effects of feeding diets containing either a gelling fibre (alginate (ALG)), or a fermentable fibre (resistant starch (RS)), or both, on feeding patterns, behaviour and growth performance of growing pigs fed ad libitum for 12 weeks. The experiment was set up as a 2×2 factorial arrangement: inclusion of ALG (yes or no) and inclusion of RS (yes or no) in the control diet, resulting in four dietary treatments, that is, ALG-RS- (control), ALG+RS-, ALG-RS+, and ALG+RS+. Both ALG and RS were exchanged for pregelatinized potato starch. A total of 240 pigs in 40 pens were used. From all visits to an electronic feeding station, feed intake and detailed feeding patterns were calculated. Apparent total tract digestibility of energy, dry matter (DM), and CP was determined in week 6. Pigs’ postures and behaviours were scored from live observations in weeks 7 and 12. Dietary treatments did not affect final BW and average daily gain (ADG). ALG reduced energy and DM digestibility (P
    Effects of dietary fibre on feeding patterns, behaviour and growth in pigs
    Souza Da Silva, C. ; Bosch, G. ; Bolhuis, J.E. ; Stappers, L.J.N. ; Hees, H.M.J. van; Gerrits, W.J.J. ; Kemp, B. - \ 2013
    In: Proceedings of the Benelux ISAE (International Society for Applied Ethology) conference 2013, 10 October 2013, Sterksel, the Netherlands. - - p. 16 - 16.
    Effects of alginate and resistant starch on feeding patterns, behavior and growth in growing pigs
    Souza Da Silva, C. ; Bosch, G. ; Bolhuis, J.E. ; Stappers, L.J.N. ; Hees, H.M.J. van; Gerrits, W.J.J. ; Kemp, B. - \ 2013
    In: Proceedings of the 47th Congress of the International Society for Applied Ethology (ISAE), 2-6 June 2013, Florianopolis, Brazil. - Wageningen, The Netherlands : Wageningen Academic Publishers - ISBN 9789086862252 - p. 62 - 62.
    Klimaatverandering in Nederland
    Hutjes, R.W.A. - \ 2011
    In: Duurzaam erfgoed: duurzaamheid, energiebesparing en monumenten / Hermans, T., Stappers, M., van de Ven, H., Amersfoort/Houten : De Rijksdienst voor het Cultureel Erfgoed/Terra Lannoo - ISBN 9789089894861 - 264 p.
    A Design Approach to Research and a Landscape Approach to Design
    Koh, J. - \ 2010
    In: Proceedings of the symposium Design Research in the Netherlands 2010, Eindhoven, The Netherlands, 20-21 May 2010. - Eindhoven : TU Eindhoven - ISBN 9789068146301 - p. 91 - 100.
    Koh (pp. 91-100) outlines similarities and differences between landscape design and architectural design, as in particular in the modernist period landscape design was influenced a lot by an architectural approach. As landscape design deals with different issues however, it has generated its own strategies and methods. In particular the connection between research and design seems to be underdeveloped and needs more attention. Koh shows how this is done at the Wageningen University and presents a number of research-design projects as examples.
    Yield-SAFE: A parameter-sparse process-based dynamic model for predicting resource capture, growth and production in agroforestry systems
    Werf, W. van der; Keesman, K.J. ; Burgess, P.J. ; Graves, A.R. ; Pilbeam, D. ; Incoll, L.D. ; Metselaar, K. ; Mayus, M.M. ; Stappers, R.J.J. ; Keulen, H. van; Palma, J.H.N. ; Dupraz, C. - \ 2007
    Ecological Engineering 29 (2007)4. - ISSN 0925-8574 - p. 419 - 433.
    1. Silvoarable agroforestry (SAF) is the cultivation of trees and arable crops on the same parcel of land. SAF may contribute to modern diversified land use objectives in Europe, such as enhanced biodiversity and productivity, reduced leaching of nitrogen, protection against flooding and erosion, and attractiveness of the landscape. Long-term yield predictions are needed to assess long-term economic profitability of SAF. 2. A model for growth, resource sharing and productivity in agroforestry systems was developed to act as a tool in forecasts of yield, economic optimization of farming enterprises and exploration of policy options for land use in Europe. The model is called Yield-SAFE; from ¿YIeld Estimator for Long term Design of Silvoarable AgroForestry in Europe¿. The model was developed with as few equations and parameters as possible to allow model parameterization under constrained availability of data from long-term experiments. 3. The model consists of seven state equations expressing the temporal dynamics of: (1) tree biomass; (2) tree leaf area; (3) number of shoots per tree; (4) crop biomass; (5) crop leaf area index; (6) heat sum; and (7) soil water content. The main outputs of the model are the growth dynamics and final yields of trees and crops. Daily inputs are temperature, radiation and precipitation. Planting densities, initial biomasses of tree and crop species, and soil parameters must be specified. 4. A parameterization of Yield-SAFE is generated, using published yield tables for tree growth and output from the comprehensive crop simulation model STICS. Analysis of tree and crop growth data from two poplar agroforestry stands in the United Kingdom demonstrates the validity of the modelling concept and calibration philosophy of Yield-SAFE. A sensitivity analysis is presented to elucidate which biological parameters most influence short and long-term productivity and land equivalent ratio. 5. The conceptual model, elaborated in Yield-SAFE, in combination with the outlined procedure for model calibration, offers a valid tool for exploratory land use studies
    Can high-performance liquid chromatography coupled with fluorescence detection under all conditions be regarded as a sufficiently conclusive confirmatory method for B-group substances?
    Zuidema, T. ; Mulder, P.P.J. ; Lasaroms, J.J.P. ; Stappers, S.J.W. ; Rhijn, J.A. van - \ 2006
    Food Additives and Contaminants 23 (2006)11. - ISSN 0265-203X - p. 1149 - 1156.
    mass-spectrometry - salicylic-acid - surface-water - waste-water - drugs
    Commission Decision 2002/657/EC requires confirmatory analysis of B-group compounds when detected at levels above the permitted limit. In contrast to banned substances, for B-group substances, the use of mass spectrometric techniques is not obligatory and several techniques including liquid chromatography (LC)-ultraviolet light (UV) on two different LC columns and (single-column) high-performance liquid chromatography (HPLC)-fluorescence (Flu) are considered to deliver sufficient evidence for the identification of the detected substance. The analysis of sodium salicylate in animal drinking water collected at poultry farms is presented here as an example to show that even in a simple matrix such as animal drinking water, fluorescence detection in some cases may provide inadequate specificity. Of 50 samples analysed by LC-Flu, 18 tested positive for sodium salicylate. However, only in one sample was the presence of the analyte confirmed with mass spectrometric detection; the others were blank. Consequently, the LC-Flu results obtained were false-non-compliant for sodium salicylate. A second case concerning the analysis of avermectins in milk by HLPC-Flu is briefly described. For a number of samples analysed in the framework of a proficiency test, false non-compliant results for emamectin were reported due to a background interference sometimes present that practically co-eluted with the analyte. The observed retention time difference (1%) was well below the criterion (2.5%) specified in Commission Decision 2002/657/EC. Considering the impact of positive findings on individual farmers as well as on trade, product image and food safety perception by the consumer, it is concluded that also for B-group substances false-non-compliant results should be avoided whenever possible. This is especially important when the results are treated as and are expected to have the same repercussions as in the case of banned A-group substances. In these circumstances, only results obtained by mass spectrometry should be considered for confirmatory purposes
    Nonlinear set-membership estimation: A support vector machine approach
    Keesman, K.J. ; Stappers, R.J.J. - \ 2004
    Journal of Inverse and Ill-Posed Problems 12 (2004)1. - ISSN 0928-0219 - p. 27 - 42.
    Method for the preparation of starch particles
    Soest, J.J.G. van; Stappers, H.J.M. ; Schijndel, R.J.G. van; Gottlieb, K.F. ; Feil, H. - \ 2000
    Octrooinummer: WO0040617, gepubliceerd: 2000-07-13.
    A method for the preparation of starch particles in a two-phase system comprises at least the following steps: a) a preparation of a first phase comprising a dispersion of starch in water; b) preparation of a dispersion or emulsion of the first phase in a second liquid phase, with the proviso that the second phase is not water; c) cross-linking of the starch present in the first phase; d) separating the starch particles thus formed. According to a first aspect of the invention the second phase consists of a hydrophobic liquid and step b) consists in forming an oil-in-water emulsion, which is then inverted to a water-in-oil emulsion. According to a second aspect of the invention, the second phase consists of a water-miscible non-solvent for starch. Starch particles of very small particles size can be produced in a controlled manner by means of this method.
    Oriënterend onderzoek naar de houdbaarheid van verse kruiden : onderzoek als onderdeel van het AKK project GF-95.001 "toegevoegde waarde strategie project Frugifera"
    Polderdijk, J.J. ; Boogaard, G.J.P.M. van den; Boerrigter, H.A.M. ; Stappers, S. ; Evelo, R.G. - \ 1997
    Wageningen : Instituut voor Agrotechnologisch Onderzoek (ATO-DLO) (Rapport / Instituut voor Agrotechnologisch Onderzoek ATO-DLO B255) - 9
    Onderzoek ten behoeve van de ontwikkeling van een optimale MA-kleinverpakking voor radijs met blad : onderzoek als onderdeel van het AKK project GF-95.001 "toegevoegde waarde strategie project Frugifera"
    Polderdijk, J.J. ; Boogaard, G.J.P.M. van den; Boerrigter, H.A.M. ; Stappers, S. ; Evelo, R.G. - \ 1997
    Wageningen : Instituut voor Agrotechnologisch Onderzoek (ATO-DLO) (Rapport / Instituut voor Agrotechnologisch Onderzoek ATO-DLO B256) - 27
    Kwaliteitsverloop en houdbaarheid van MA-verpakte broccoli : onderzoek als onderdeel van het AKK project GF-95.001 "toegevoegde waarde strategie project Frugifera"
    Polderdijk, J.J. ; Boogaard, G.J.P.M. ; Boerrigter, H.A.M. ; Stappers, S. ; Evelo, R.G. - \ 1997
    Wageningen : Instituut voor Agrotechnologisch Onderzoekinstituut, Dienst Landbouwkundig Onderzoek (ATO-DLO) (ATO-rapport B257) - 17
    Rapportage AKK-project (Stichting Agro Keten Kennis) "toegevoegde waarde strategie project Frugifera" : rapport nr.1 : Optimalisatie van een kleinverpakking voor trostomaten /
    Polderdijk, J.J. ; Boogaard, G.J.P.M. ; Stappers, S. ; Evelo, R.G. - \ 1996
    Wageningen : Agrotechnologisch Onderzoek Instituut (ATO-DLO) - 13
    Optimalisatie van een kleinverpakking voor witlofkroppen : onderzoek als onderdeel van het AKK-project nr. 577 (Stichting Agro Kennis Keten) 'toegvoegde waarde strategie project Frugifera'
    Polderdijk, J.J. ; Boerrigter, H.A.M. ; Boogaard, G.J.P.M. van den; Stappers, S. ; Evelo, R. - \ 1996
    Wageningen : Agrotechnologisch Onderzoek Instituut (ATO-DLO) (Rapport / Instituut voor Agrotechnologisch Onderzoek ATO-DLO B216) - 12
    Onderzoek te behoeve van optimalisatie van een MA-kleinverpakking en kwaliteitsvoorspellingen voor panklare geschoonde spruiten
    Polderdijk, J.J. ; Boerrigter, H.A.M. ; Boogaard, G.J.P.M. van den; Robat, S. ; Peppelenbos, H.W. ; Stappers, S. ; Oosterhaven, J. ; Evelo, R.G. - \ 1996
    Wageningen : Agrotechnologisch Onderzoek Instituut (ATO-DLO) (Rapport / Instituut voor Agrotechnologisch Onderzoek, Dienst Landbouwkundig Onderzoek (ATO-DLO) B202) - 32
    Onderzoek ten behoeve van optimalisatie van MA-kleinverpakking en kwaliteitsvoorspellingen voor panklaar geschoonde spruiten
    Polderdijk, J.J. ; Boerrigter, H.A.M. ; Robat, S.A. ; Peppelenbos, H.W. ; Boogaard, G.J.P.M. van den; Stappers, S. ; Oosterhaven, J. ; Evelo, R.G. - \ 1996
    Wageningen : ATO-DLO (Rapport / ATO-DLO B202) - 32
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