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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    A global meta-analysis on the monetary valuation of dryland ecosystem services : The role of socio-economic, environmental and methodological indicators
    Schild, Johanna E.M. ; Vermaat, Jan E. ; Groot, Rudolf S. de; Quatrini, Simone ; Bodegom, Peter M. van - \ 2018
    Ecosystem Services 32 (2018). - ISSN 2212-0416 - p. 78 - 89.
    Dryland - Ecosystem services - Environmental indicators - Meta-analysis - Monetary valuation - Socio-economic indicators

    Monetary valuation of dryland ecosystem services may help to increase the salience of drylands in decision making. Yet, there is no comprehensive assessment of the indicators that determine the estimated monetary values for dryland ecosystem services (hereafter: dryland value). Having compiled a database consisting of 559 observations from 66 valuation studies in drylands worldwide, this study analyzes the relative importance of local socio-economic, environmental and methodological indicators in explaining the monetary value estimates for nine dryland ecosystem services by means of a multiple regression analysis. By explicitly quantifying the effect sizes of the indicators of dryland value, we shed new light on the driving forces behind monetary valuation of dryland ecosystem services. Our results show that local socio-economic and environmental conditions are marginal in explaining dryland value, indicating that local dryland conditions are not sufficiently captured with current valuation approaches. Simultaneously, we find that methodological factors, including valuation method and study extent, heavily influence dryland value, suggesting that monetary valuation outcomes are largely determined by the selected methodology. This emphasizes the need to improve monetary valuation methods so that they better capture local dryland conditions in order to be able to serve as a meaningful tool for decision making.

    DNA methylation as a mediator of the association between prenatal adversity and risk factors for metabolic disease in adulthood
    Tobi, Elmar W. ; Slieker, Roderick C. ; Luijk, René ; Dekkers, Koen F. ; Stein, Aryeh D. ; Xu, Kate M. ; Slagboom, P.E. ; Zwet, Erik W. Van; Lumey, L.H. ; Heijmans, Bastiaan T. ; T'Hoen, Peter A. ; Pool, René ; Greevenbroek, Marleen M. Van; Stehouwer, Coen D. ; Kallen, Carla J. Van Der; Schalkwijk, Casper G. ; Wijmenga, Cisca ; Zhernakova, Sasha ; Tigchelaar, Ettje F. ; Beekman, Marian ; Deelen, Joris ; Heemst, Diana Van; Veldink, Jan H. ; Berg, Leonard H. Van Den; Duijn, Cornelia M. Van; Hofman, Albert ; Uitterlinden, André G. ; Jhamai, P.M. ; Verbiest, Michael ; Verkerk, Marijn ; Breggen, Ruud Van Der; Rooij, Jeroen Van; Lakenberg, Nico ; Mei, Hailiang ; Bot, Jan ; Zhernakova, Dasha V. ; Hof, Peter Van 't; Deelen, Patrick ; Nooren, Irene ; Moed, Matthijs ; Vermaat, Martijn ; Jan Bonder, Marc ; Dijk, Freerk Van; Arindrarto, Wibowo ; Kielbasa, Szymon M. ; Swertz, Morris A. ; Isaacs, Aaron ; Franke, Lude - \ 2018
    Science Advances 4 (2018)1. - ISSN 2375-2548
    Although it is assumed that epigenetic mechanisms, such as changes in DNA methylation (DNAm), underlie the relationship between adverse intrauterine conditions and adult metabolic health, evidence from human studies remains scarce. Therefore, we evaluated whether DNAm in whole blood mediated the association between prenatal famine exposure and metabolic health in 422 individuals exposed to famine in utero and 463 (sibling) controls. We implemented a two-step analysis, namely, a genome-wide exploration across 342, 596 cytosine-phosphate-guanine dinucleotides (CpGs) for potential mediators of the association between prenatal famine exposure and adult body mass index (BMI), serum triglycerides (TG), or glucose concentrations, which was followed by formalmediation analysis.DNAm mediated the association of prenatal famine exposure with adult BMI and TG but not with glucose. DNAm at PIM3 (cg09349128), a gene involved in energy metabolism, mediated 13.4% [95% confidence interval (CI), 5 to 28%] of the association between famine exposure and BMI. DNAm at six CpGs, including TXNIP (cg19693031), influencing b cell function, and ABCG1 (cg07397296), affecting lipid metabolism, together mediated 80% (95% CI, 38.5 to 100%) of the association between famine exposure and TG. Analyses restricted to those exposed to famine during early gestation identified additional CpGs mediating the relationship with TG near PFKFB3 (glycolysis) and METTL8 (adipogenesis). DNAm at the CpGs involved was associated with gene expression in an external data set and correlated with DNAm levels in fat depots in additional postmortem data. Our data are consistent with the hypothesis that epigenetic mechanisms mediate the influence of transient adverse environmental factors in early life on long-termmetabolic health. The specific mechanism awaits elucidation.
    The Era of Reconstruction and Land consolidation in perspective : lessons learned, 2017
    Rooij, L.L. de; Rheenen, J. van - \ 2017
    In: Post-War Reconstruction the Netherlands 1945-1965 / Blom, Anita, Vermaat , Simone, Vries, de , Ben, Rotterdam, Netherlands : NAi010 - ISBN 9789462082793 - p. 56 - 61.
    Differentiating the effects of climate and land use change on European biodiversity : A scenario analysis
    Vermaat, Jan E. ; Hellmann, Fritz A. ; Teeffelen, Astrid J.A. van; Wallis de Vries, Michiel - \ 2017
    Ambio 46 (2017)3. - ISSN 0044-7447 - p. 277 - 290.
    Climate envelope modelling - Dry grasslands - Habitat connectivity - Land use change - Species sensitivity database - SRES scenario articulation - Wetlands - 016-3982 - 017-3997
    Current observed as well as projected changes in biodiversity are the result of multiple interacting factors, with land use and climate change often marked as most important drivers. We aimed to disentangle the separate impacts of these two for sets of vascular plant, bird, butterfly and dragonfly species listed as characteristic for European dry grasslands and wetlands, two habitats of high and threatened biodiversity. We combined articulations of the four frequently used SRES climate scenarios and associated land use change projections for 2030, and assessed their impact on population trends in species (i.e. whether they would probably be declining, stable or increasing). We used the BIOSCORE database tool, which allows assessment of the effects of a range of environmental pressures including climate change as well as land use change. We updated the species lists included in this tool for our two habitat types. We projected species change for two spatial scales: the EU27 covering most of Europe, and the more restricted biogeographic region of ‘Continental Europe’. Other environmental pressures modelled for the four scenarios than land use and climate change generally did not explain a significant part of the variance in species richness change. Changes in characteristic bird and dragonfly species were least pronounced. Land use change was the most important driver for vascular plants in both habitats and spatial scales, leading to a decline in 50–100% of the species included, whereas climate change was more important for wetland dragonflies and birds (40–50 %). Patterns of species decline were similar in continental Europe and the EU27 for wetlands but differed for dry grasslands, where a substantially lower proportion of butterflies and birds declined in continental Europe, and 50 % of bird species increased, probably linked to a projected increase in semi-natural vegetation. In line with the literature using climate envelope models, we found little divergence among the four scenarios. Our findings suggest targeted policies depending on habitat and species group. These are, for dry grasslands, to reduce land use change or its effects and to enhance connectivity, and for wetlands to mitigate climate change effects.
    Annual sulfate budgets for Dutch lowland peat polders : The soil is a major sulfate source through peat and pyrite oxidation
    Vermaat, Jan E. ; Harmsen, Joop ; Hellmann, Fritz A. ; Geest, Harm G. van der; Klein, Jeroen J.M. de; Kosten, Sarian ; Smolders, Alfons J.P. ; Verhoeven, Jos T.A. ; Mes, Ron G. ; Ouboter, Maarten - \ 2016
    Journal of Hydrology 533 (2016). - ISSN 0022-1694 - p. 515 - 522.
    Internal eutrophication - Peat mineralization - Pyrite - Subsidence - Toxicity - Water level management

    Annual sulfate mass balances have been constructed for four low-lying peat polders in the Netherlands, to resolve the origin of high sulfate concentrations in surface water, which is considered a water quality problem, as indicated amongst others by the absence of sensitive water plant species. Potential limitation of these plants to areas with low sulfate was analyzed with a spatial match-up of two large databases. The peat polders are generally used for dairy farming or nature conservation, and have considerable areas of shallow surface water (mean 16%, range 6-43%). As a consequence of continuous drainage, the peat in these polders mineralizes causing subsidence rates generally ranging between 2 and 10mmy- 1. Together with pyrite oxidation, this peat mineralization the most important internal source of sulfate, providing an estimated 96kgSO4ha- 1mm- 1subsidencey- 1. External sources are precipitation and water supplied during summer to compensate for water shortage, but these were found to be minor compared to internal release. The most important output flux is discharge of excess surface water during autumn and winter. If only external fluxes in and out of a polder are evaluated, inputs average 37±9 and exports 169±17kgSha- 1y- 1. During summer, when evapotranspiration exceeds rainfall, sulfate accumulates in the unsaturated zone, to be flushed away and drained off during the wet autumn and winter. In some polders, upward seepage from early Holocene, brackish sediments can be a source of sulfate. Peat polders export sulfate to the regional water system and the sea during winter drainage. The available sulfate probably only plays a minor role in the oxidation of peat: we estimate that this is less than 10% whereas aerobic mineralization is the most important. Most surface waters in these polders have high sulfate concentrations, which generally decline during the growing season when aquatic sediments are a sink. In the sediment, this sulfur is reduced and binds iron more strongly than phosphorus, which can be released to the overlying water and potentially fuels eutrophication. About 76% of the sampled vegetation-sites exceeded a threshold of 50mgl- 1SO4, above which sensitive species, such as Stratiotes aloides, and several species of Potamogeton were significantly less abundant. Thus high sulfate concentrations, mainly due to land drainage and consequent mineralization, appear to affect aquatic plant community composition.

    Contrasting the roles of section length and instream habitat enhancement for river restoration success: a field study on 20 European restoration projects
    Hering, D. ; Aroviita, J. ; Baattrup-Pedersen, A. ; Brabec, K. ; Buijse, T. ; Ecke, F. ; Friberg, N. ; Gielczewski, Marek ; Januschke, K. ; Köhler, J. ; Kupilas, Benjamin ; Lorenz, A.W. ; Muhar, S. ; Paillex, Amael ; Poppe, Michaela ; Schmidt, T. ; Schmutz, S. ; Vermaat, J. ; Verdonschot, R.C.M. ; Verdonschot, P.F.M. ; Wolter, Christian ; Kail, J. - \ 2015
    Wageningen UR
    aquatic macrophytes - benthic invertebrates - fish - floodplain - flow patterns - food web - ground beetles - riparian vegetation - stable isotopes
    1. Restoration of river hydromorphology often has limited detected effects on river biota. One frequently discussed reason is that the restored river length is insufficient to allow populations to develop and give the room for geomorphologic processes to occur. 2. We investigated ten pairs of restored river sections of which one was a large project involving a long, intensively restored river section and one represented a smaller restoration effort. The restoration effect was quantified by comparing each restored river section to an upstream non-restored section. We sampled the following response variables: habitat composition in the river and its floodplain, three aquatic organism groups (aquatic macrophytes, benthic invertebrates and fish), two floodplain-inhabiting organism groups (floodplain vegetation, ground beetles), as well as food web composition and land–water interactions reflected by stable isotopes. 3. For each response variable, we compared the difference in dissimilarity of the restored and nearby non-restored section between the larger and the smaller restoration projects. In a second step, we regrouped the pairs and compared restored sections with large changes in substrate composition to those with small changes. 4. When comparing all restored to all non-restored sections, ground beetles were most strongly responding to restoration, followed by fish, floodplain vegetation, benthic invertebrates and aquatic macrophytes. Aquatic habitats and stable isotope signatures responded less strongly. 5. When grouping the restored sections by project size, there was no difference in the response to restoration between the projects targeting long and short river sections with regard to any of the measured response variables except nitrogen isotopic composition. In contrast, when grouping the restored sections by substrate composition, the responses of fish, benthic invertebrates, aquatic macrophytes, floodplain vegetation and nitrogen isotopic composition were greater in sections with larger changes in substrate composition as compared to those with smaller changes. 6. Synthesis and applications. The effects of hydromorphological restoration measures on aquatic and floodplain biota strongly depend on the creation of habitat for aquatic organisms, which were limited or not present prior to restoration. These positive effects on habitats are not necessarily related to the restored river length. Therefore, we recommend a focus on habitat enhancement in river restoration projects.
    Contrasting the roles of section length and instream habitat enhancement for river restoration success : A field study of 20 European restoration projects
    Hering, Daniel ; Aroviita, Jukka ; Baattrup-Pedersen, Annette ; Brabec, Karel ; Buijse, Tom ; Ecke, Frauke ; Friberg, Nikolai ; Gielczewski, Marek ; Januschke, Kathrin ; Köhler, Jan ; Kupilas, Benjamin ; Lorenz, Armin W. ; Muhar, Susanne ; Paillex, Amael ; Poppe, Michaela ; Schmidt, Torsten ; Schmutz, Stefan ; Vermaat, Jan ; Verdonschot, Piet F.M. ; Verdonschot, Ralf C.M. ; Wolter, Christian ; Kail, Jochem - \ 2015
    Journal of Applied Ecology 52 (2015)6. - ISSN 0021-8901 - p. 1518 - 1527.
    Aquatic macrophytes - Benthic invertebrates - Fish - Floodplain - Flow patterns - Food web - Ground beetles - Riparian vegetation - Stable isotopes

    Restoration of river hydromorphology often has limited detected effects on river biota. One frequently discussed reason is that the restored river length is insufficient to allow populations to develop and give the room for geomorphological processes to occur. We investigated ten pairs of restored river sections of which one was a large project involving a long, intensively restored river section and one represented a smaller restoration effort. The restoration effect was quantified by comparing each restored river section to an upstream non-restored section. We sampled the following response variables: habitat composition in the river and its floodplain, three aquatic organism groups (aquatic macrophytes, benthic invertebrates and fish), two floodplain-inhabiting organism groups (floodplain vegetation, ground beetles), as well as food web composition and land-water interactions reflected by stable isotopes. For each response variable, we compared the difference in dissimilarity of the restored and nearby non-restored section between the larger and the smaller restoration projects. In a second step, we regrouped the pairs and compared restored sections with large changes in substrate composition to those with small changes. When comparing all restored to all non-restored sections, ground beetles were most strongly responding to restoration, followed by fish, floodplain vegetation, benthic invertebrates and aquatic macrophytes. Aquatic habitats and stable isotope signatures responded less strongly. When grouping the restored sections by project size, there was no difference in the response to restoration between the projects targeting long and short river sections with regard to any of the measured response variables except nitrogen isotopic composition. In contrast, when grouping the restored sections by substrate composition, the responses of fish, benthic invertebrates, aquatic macrophytes, floodplain vegetation and nitrogen isotopic composition were greater in sections with larger changes in substrate composition as compared to those with smaller changes. Synthesis and applications. The effects of hydromorphological restoration measures on aquatic and floodplain biota strongly depend on the creation of habitat for aquatic organisms, which were limited or not present prior to restoration. These positive effects on habitats are not necessarily related to the restored river length. Therefore, we recommend a focus on habitat enhancement in river restoration projects. The effects of hydromorphological restoration measures on aquatic and floodplain biota strongly depend on the creation of habitat for aquatic organisms, which were limited or not present prior to restoration. These positive effects on habitats are not necessarily related to the restored river length. Therefore, we recommend a focus on habitat enhancement in river restoration projects.

    Klimaatbuffers: wat bedoelen we eigenlijk?
    Vermaat, J. ; Sterk, M. ; Reisinger, M. ; Mark, C. van der - \ 2013
    Landschap : tijdschrift voor landschapsecologie en milieukunde 30 (2013)4. - ISSN 0169-6300 - p. 160 - 161.
    natuurgebieden - wateropslag - natuurontwikkeling - landgebruik - ecosysteemdiensten - natural areas - water storage - nature development - land use - ecosystem services
    Klimaatbuffers zijn bedoeld om stad en land te beschermen tegen klimaatverandering. Maar klimaatbuffers gaan ook over natuurlijke oplossingen en meer kansen voor natuur en landschap. De coalitie Natuurlijke Klimaatbuffers, een coalitie van zeven natuurorganisaties, zag de mogelijkheden en ging samenwerken met waterbeherend Nederland om natuurwinst te realiseren bij concrete inrichtingsprojecten die ons land klimaatbestendiger moeten maken. Dit themanummer brengt voorbeeldprojecten, opinie en verdieping bij elkaar om te onderstrepen dat dit nodig is en ook werkt.
    Health sector costs of self-reported food allergy in Europe: a patient-based cost of illness study
    Mugford, M. ; Fox, M. ; Voordouw, J. ; Cornelisse-Vermaat, J.R. ; Antonides, G. ; Hoz Caballer, B. de la - \ 2013
    European Journal of Public Health 23 (2013)5. - ISSN 1101-1262 - p. 757 - 762.
    prevalence - questionnaires - consumers
    Introduction: Food allergy is a recognized health problem, but little has been reported on its cost for health services. The EuroPrevall project was a European study investigating the patterns, prevalence and socio-economic cost of food allergy. Aims: To investigate the health service cost for food-allergic Europeans and the relationship between severity and cost of illness. Methods: Participants recruited through EuroPrevall studies in a case–control study in four countries, and cases only in five countries, completed a validated economics questionnaire. Individuals with possible food allergy were identified by clinical history, and those with food-specific immunoglobulin E were defined as having probable allergy. Data on resource use were used to estimate total health care costs of illness. Mean costs were compared in the case–control cohorts. Regression analysis was conducted on cases from all 9 countries to assess impact of country, severity and age group. Results: Food-allergic individuals had higher health care costs than controls. The mean annual cost of health care was international dollars (I$)2016 for food-allergic adults and I$1089 for controls, a difference of I$927 (95% confidence interval I$324–I$1530). A similar result was found for adults in each country, and for children, and was not sensitive to baseline demographic differences. Cost was significantly related to severity of illness in cases in nine countries. Conclusions: Food allergy is associated with higher health care costs. Severity of allergic symptoms is a key explanatory factor.
    Outsourcing child care, home cleaning and meal preparation
    Cornelisse-Vermaat, J.R. ; Ophem, J.A.C. van; Antonides, G. ; Maassen van den Brink, H. - \ 2013
    International Journal of Consumer Studies 37 (2013)5. - ISSN 1470-6423 - p. 530 - 537.
    service economy - time - allocation - housework - labor - work - expenditures - food
    In this paper, the outsourcing of child care, home cleaning and meal preparation is analysed by means of a socio-economic model that incorporates household-economic, life cycle, lifestyle and health variables. The data (n¿=¿700) were collected during a telephone survey in the Netherlands. About 10% of the households did not use any of the three outsourcing types. About 70 to 90% of households outsourced meal preparation at least once per month. In each household life cycle stage, the average monthly expenditures on outsourcing meal preparation were the highest of the three outsourcing categories. Factors affecting expenditures were generally the same for each type of outsourcing studied. In general, household economic variables including wage and working hours were unimportant in explaining the incidence and expenditures of outsourcing. The same holds for self-reported health. All expenditure types were affected by life cycle variables. There was an indication that a traditional lifestyle and traditional family type affected outsourcing expenditures negatively. Education appeared as an important factor: regardless of gender, both medium- and higher-educated people were more inclined to spend money on outsourcing than the lower educated. Especially, people younger than 44 years outsourced meal preparation. Outsourcing was neither restricted to nor especially practised by couples.
    Sulfaatbronnen in het Hollandse veenlandschap
    Vermaat, J.E. ; Harmsen, J. ; Hellman, F.A. ; Geest, H. van der; Klein, J.J.M. de; Konsten, S. ; Smolders, A.J.P. ; Verhoeven, J.T.A. ; Mes, R.G. ; Ouboter, M. - \ 2013
    Landschap : tijdschrift voor landschapsecologie en milieukunde 30 (2013)1. - ISSN 0169-6300 - p. 5 - 13.
    veengronden - waterkwaliteit - oppervlaktewater - sulfaat - wateraanvoer - bodemwater - veenweiden - groene hart - utrecht - zuid-holland - peat soils - water quality - surface water - sulfate - water advance - soil water - peat grasslands - groene hart - utrecht - zuid-holland
    De sulfaatbalansen van perceel, sloot en polder zijn nauw met elkaar verweven. Er bestaat onduidelijkheid over de effecten van sulfaat op de waterkwaliteit en over het relatieve belang van verschillende bronnen van sulfaat in het Hollands-Utrechtse veenlandschap. Deze studie laat zien dat oxidatie van het gebiedseigen veen meestal de belangrijkste bron is en dat de veenpolders netto exporteurs zijn van sulfaat. Over het algemeen zijn de sulfaatconcentraties in het oppervlaktewater van het laagveengebied vrij hoog. Dit heeft een verarmende invloed op de watervegetatie.
    Zwaveldynamiek in het West-Nederlandse laagveengebied : met het oog op klimaatverandering
    Vermaat, J. ; Harmsen, J. ; Hellmann, F. ; Geest, H. van der; Klein, J.J.M. de; Kosten, S. ; Smolders, F. ; Verhoeven, J. - \ 2012
    Amsterdam : Vrije Universiteit - 83
    veenweiden - oppervlaktewater - eutrofiëring - sulfaten - natuurgebieden - klimaatverandering - west-nederland - peat grasslands - surface water - eutrophication - sulfates - natural areas - climatic change - west netherlands
    Sulfaatconcentraties in het oppervlaktewater van het West-Nederlandse laagveengebied kunnen bijzonder hoog zijn. Er bestaat onduidelijkheid over de bronnen en de effecten van dit sulfaat. De huidige studie combineert jaarbalansen op perceel-, polder- en stroomgebiedsschaal met een analyse van de ruimtelijke variatie in sulfaatconcentraties, en met een literatuurstudie naar kritische drempelconcentraties voor eutrofiëring, toxiciteit, en de ontwikkeling van gewenste laagveennatuur. De bevindingen worden gecombineerd met KNMI klimaatscenario’s zodat de effecten van klimaatsveranderingen kunnen worden ingeschat.
    Subjective Welfare, Well-Being, and Self-Reported Food Hypersensitivity in Four European Countries: Implications for European Policy
    Voordouw, J. ; Antonides, G. ; Fox, M. ; Cerecedo, I. ; Zamora, J. ; Hoz Caballer, B. de la; Rokicka, E. ; Cornelisse-Vermaat, J.R. ; Jewczak, M. ; Starosta, P. ; Kowalska, M.L. ; Jedrzejczak-Czechowicz, M. ; Vázquez-Cortés, S. ; Escudero, C. ; Flokstra-de Blok, B.M. ; Dubois, A.E.J. ; Mugford, M. ; Frewer, L.J. - \ 2012
    Social Indicators Research 107 (2012)3. - ISSN 0303-8300 - p. 465 - 482.
    quality-of-life - labeling preferences - allergic consumers - economic costs - health - children - prevalence - income - questionnaire - explanation
    This study estimates the effects of food hypersensitivity on individuals’ perceived welfare and well-being compared to non-food hypersensitive individuals. Study respondents were recruited in the Netherlands, Poland, Spain and UK. The difference in welfare between food hypersensitive respondents and those asymptomatic to foods was estimated using a subjective welfare approach, including income evaluation. Well-being was measured using the Cantril Ladder-of-Life Scale, and health status using the Self-Perceived Health Scale. The difference in well-being, welfare and health status between participant groups was explained further using a number of background variables. No significant within-country differences in welfare between food hypersensitive respondents and respondents asymptomatic to foods were found. In terms of well-being, adult food hypersensitive respondents and their spouses reported significantly less happiness than respondents and their spouses asymptomatic to foods in the Netherlands and Poland. In Spain, the spouses of the food hypersensitive respondents were significantly less happy than respondents aymptomatic to foods. The well-being of children did not significantly differ between groups. The degree of severity of food hypersensitivity was negatively related to overall health status. In Poland, food hypersensitive respondents reported worse health status compared to asymptomatic respondents. In Spain, the converse was true. Food hypersensitive respondents were generally less happy with their life as a whole than respondents asymptomatic to foods, presumably because they experienced more negative effects, which were not related to perceived health status
    Optimising the delivery of food allergy information. An assessment of food allergic consumer preferences for different information delivery formats
    Voordouw, J. ; Antonides, G. ; Cornelisse-Vermaat, J.R. ; Pfaff, S. ; Niemietz, D. ; Frewer, L.J. - \ 2012
    Food Quality and Preference 23 (2012)1. - ISSN 0950-3293 - p. 71 - 78.
    labeling preferences - self-efficacy - prevalence - communication - perspective - europe - health - impact - trust - costs
    In this study, the preferences of food allergic consumers for different prototype information delivery tools was examined, with the aim of improving informed product choices. Sixty-two self-reported food allergic participants from the Netherlands and Germany were included in the study. Each tested three prototype information delivery tools (a food label, a handheld electronic scanner, and an information booklet) to access allergy information. Participants rated each tool in terms of perceived convenience, usefulness and confidence. Principal Component Analysis indicated that convenience and usefulness loaded on one construct, namely functionality. The impact of information delivery tool and country on functionality and confidence was analysed with two repeated measures generalised linear models. The highest perceived functionality was found for the label. The electronic scanner was rated as the next most functional method to deliver information, followed by the booklet. Food allergic consumers were equally confident about using all three information delivery tools. The results have implications for developing new policies and legislation concerning information provision to food allergic consumers
    Outsourcing childcare, home cleaning and meal preparation
    Cornelisse-Vermaat, J.R. ; Ophem, J.A.C. van; Antonides, G. ; Maassen van den Brink, H. - \ 2011
    In this paper the outsourcing of childcare, home cleaning and meal preparation is analysed by means of a socio-economic model that incorporates household-economic, lifecycle, lifestyle and health variables. The data (n= 700) was collected during a telephone survey in the Netherlands. About 10 per cent of the households did not use any of the three forms of outsourcing. About 70 to 90 per cent of households outsourced meal preparation. In any household type, the average monthly expenditures on outsourcing meal preparation were the highest of the three outsourcing categories. In the data analysis a Heckman selection model was applied. Factors affecting different outsourcing expenditures were generally the same for each type of outsourcing studied . Household economic variables as wage and working hours were in general not important in explaining the incidence and expenditures of outsourcing. The same hold for health. Childcare expenditures were also affected positively by life-cycle variables. There was an indication that a traditional lifestyle and traditional family type affected outsourcing expenditures negatively. Education appeared as an important taste shaper: regardless of gender, both medium and higher educated people were more inclined to spend money on outsourcing than the lower educated. Especially people younger than 44 years outsourced meal preparation. Outsourcing was neither restricted to nor especially practised by couples.
    Chromothripsis is a common mechanism driving genomic rearrangements in primary and metastatic colorectal cancer
    Kloosterman, W.P. ; Hoogstraat, M. ; Paling, O. ; Tavakoli-Yaraki, M. ; Renkens, I. ; Vermaat, J.S. ; Roosmalen, M.J. van; Lieshout, S. van; Nijman, I.J. ; Roessingh, W. ; Slot, R. van 't; Belt, J. van de - \ 2011
    Genome Biology 12 (2011)10. - ISSN 1474-7596 - 11 p.
    human breast - pancreatic-cancer - resolution - evolution - patterns - mutation - progression - landscapes - enrichment - genes
    Background - Structural rearrangements form a major class of somatic variation in cancer genomes. Local chromosome shattering, termed chromothripsis, is a mechanism proposed to be the cause of clustered chromosomal rearrangements and was recently described to occur in a small percentage of tumors. The significance of these clusters for tumor development or metastatic spread is largely unclear. Results - We used genome-wide long mate-pair sequencing and SNP array profiling to reveal that chromothripsis is a widespread phenomenon in primary colorectal cancer and metastases. We find large and small chromothripsis events in nearly every colorectal tumor sample and show that several breakpoints of chromothripsis clusters and isolated rearrangements affect cancer genes, including NOTCH2, EXO1 and MLL3. We complemented the structural variation studies by sequencing the coding regions of a cancer exome in all colorectal tumor samples and found somatic mutations in 24 genes, including APC, KRAS, SMAD4 and PIK3CA. A pairwise comparison of somatic variations in primary and metastatic samples indicated that many chromothripsis clusters, isolated rearrangements and point mutations are exclusively present in either the primary tumor or the metastasis and may affect cancer genes in a lesion-specific manner. Conclusions - We conclude that chromothripsis is a prevalent mechanism driving structural rearrangements in colorectal cancer and show that a complex interplay between point mutations, simple copy number changes and chromothripsis events drive colorectal tumor development and metastasis
    Preferred Information Strategies for Food Allergic Consumers. A Study in Germany, Greece, and The Netherlands
    Voordouw, J. ; Cornelisse-Vermaat, J.R. ; Pfaff, S. ; Antonides, G. ; Niemietz, D. ; Linardakis, M. ; Kehagia, O. ; Frewer, L.J. - \ 2011
    Food Quality and Preference 22 (2011)4. - ISSN 0950-3293 - p. 384 - 390.
    peanut allergy - prevalence - children - attitudes - parents - europe - label
    Information provided on food packaging is currently the most important method enabling food allergic consumers to eliminate allergens from their diet. This study aimed to identify the preferences of food allergic consumers regarding different information provision scenarios. Respondents (N = 287) filled out a web-based questionnaire on their preferences regarding a food label, an in-store booklet, and an ICT-solution. ICT methods will not replace effective food labelling, but may be used to supplement information provided by labels. Recommendations for information delivery to food allergic patients in the form of labels and booklets, as well as personalised (novel ICT) approaches, are provided.
    Household costs associated with food allergy: an exploratory study
    Voordouw, J. ; Fox, M. ; Cornelisse-Vermaat, J.R. ; Antonides, G. ; Mugford, M. ; Frewer, L.J. - \ 2010
    British Food Journal 112 (2010)11. - ISSN 0007-070X - p. 1205 - 1215.
    quality-of-life - health - children - impact - questionnaires - framework - europe - adults
    Purpose – Food allergy has potential to affect direct, indirect and intangible economic costs experienced by food allergic individuals and their families, resulting in negative impacts on welfare and well-being. The purpose of this paper is to develop an instrument to assess these economic costs of food allergy at household level and to conduct an exploratory analysis of potential economic impact. Design/methodology/approach – A case-controlled postal pilot survey was conducted using a self-completion instrument. Cases had either clinically or self-diagnosed food allergy. Controls were obtained from households in which none of the members had food allergies. Findings – The instrument appeared sensitive to the economic cost differences between households with and without food allergic members. Direct costs of health care were significantly higher for cases than for controls. Similar differences were identified for indirect cost of lost earnings, and costs due to inability to perform domestic tasks because of ill health. Intangible costs (self-reported health status and well-being), indicated significantly lower subjective well-being for cases. Research limitations/implications – Larger sample sizes will be needed to reliably assess the size of impact, cross-cultural variation in costs, and whether costs vary according to severity of food allergy or between diagnosed versus self-reported food allergy. The costs effectiveness of diagnostic methods or interventions may also be assessed using this instrument. If economic costs of food allergy are significant in the population further consideration from a public health policy perspective will be required. Originality/value – To date, economic impact of food allergy on individuals and households has not been quantified. The paper addresses this. Keywords Economics, Personal health, Research and development, The Netherlands, United Kingdom
    Toekomstbeeld broeikasgasbalans van het Nederlandse landschap
    Moors, E.J. ; Hutjes, R.W.A. ; Dolman, H. ; Vermaat, J. ; Kuikman, P.J. ; Dijk, J. van - \ 2010
    Landschap : tijdschrift voor landschapsecologie en milieukunde 27 (2010)2. - ISSN 0169-6300 - p. 111 - 114.
    broeikasgassen - emissie - kooldioxide - monitoring - inventarisaties - greenhouse gases - emission - carbon dioxide - monitoring - inventories
    De mondiale emissies van CO2 zijn de afgelopen jaren substantieel gestegen. Een afbuiging van deze trend lijkt noodzakelijk, wil de concentratie in de atmosfeer niet te hoog oplopen. De internationale gemeenschap probeert die te realiseren door stevige reductiedoelstellingen vast te stellen voor de komende tien tot dertig jaar. De inspanningen zijn gericht op terugdringen van emissies, compensatie van de uitstoot door afvang en opslag van CO2 en de omschakeling naar een duurzame energievoorziening.
    Variabiliteit in ruimte en tijd ontrafeld. Broeikasgasemissies uit Nederlandse landschappen
    Schulp, C.J.E. ; Jacobs, C.M.J. ; Duyzer, J. ; Beek, C.L. ; Bosveld, F. ; Dias, A.A. ; Jans, W.W.P. ; Uijl, A. ; Vermaat, J. - \ 2010
    Landschap : tijdschrift voor landschapsecologie en milieukunde 27 (2010)2. - ISSN 0169-6300 - p. 67 - 79.
    broeikasgassen - emissie - landgebruik - bodem - maïs - distikstofmonoxide - grondwaterstand - veenweiden - bemesting - utrecht - greenhouse gases - emission - land use - soil - maize - nitrous oxide - groundwater level - peat grasslands - fertilizer application - utrecht
    Greenhouse gas emissions are highly variable in spaceand time. This variability hampers measurements ofgreenhouse gas emissions and hinders the use of landuse and management as mitigation options. We give anoverview of explaining factors of temporal and spatialvariability of greenhouse gas emissions from Dutchlandscapes.CO2 fluxes have a regular annual temporal variability.Temporal variability of N2O emission is characterizedby low background emissions and high peaks that arerelated to precipitation and manure application, whiletemporal variability of CH4 fluxes is very irregular. Spatialvariability of CO2 can be explained using the croptype in agricultural land or the tree species in forests.Spatial variability of N2O and CH4 is strongly influencedby groundwater and management intensity. Additionally,at the landscape scale there is a significant greenhousegas emission from ditches and open water. Thetemporal variability has to be considered in the designof measurement campaigns, while the insight in factorsexplaining the spatial variability of greenhouse gasemissions can help to improve landscape scale estimatesof greenhouse gas emissions and guide managementdecisions for mitigation.
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