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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    Snacking practices in school: othering and deviance in a health-normative context
    Wahlen, Stefan ; Horst, Hilje van der; Reimerink, Mirte - \ 2020
    Critical Public Health (2020). - ISSN 0958-1596
    deviance - snacking - Social practice

    Many public health interventions encourage healthy behaviours by strengthening health norms within schools or workplaces. Such health norms and health-normative contexts can also produce social hierarchies and forms of othering, including unhealthy ‘deviant’ behaviours. This article aims to better articulate how deviance is produced in a health normative school context. We approach the interplay between a health-oriented environment and deviance from a practice theoretical perspective, emphasising four different facets of this perspective. This paper is based on a case study in a school that has a strong orientation towards healthy eating, drawing on observations, focus group discussions with children, interviews and a survey (forty students, aged 10–11). We analyse how strong norms on healthy behaviour depend on the meticulous guarding of boundaries with deviant behaviours as well as, in some cases, associated ‘others’. The article thereby promotes a practice theoretical approach on deviance emphasising the mundane character of healthy eating in school. We contribute to the debate on deviance and norms as to better understand healthy eating practices by distinguishing four different facets of a practice theoretical approach: 1) practice as distinct entity 2) the performance of practice 3) practices in a nexus of multiple practices and 4) individuals as nodal points of practices. The results assist in critically reflecting on assumptions upon which many public health interventions are built as well as contributing to an understanding of normativity and deviance in mundane practices such as snacking in school.

    Seed stored mRNAs that are specifically associated to monosome are translationally regulated during germination
    Bai, Bing ; Horst, Sjors Van Der; Cordewener, Jan ; America, Twan ; Hanson, Johannes ; Bentsink, Leónie - \ 2020
    Plant Physiology 182 (2020)1. - ISSN 0032-0889 - p. 378 - 392.
    The life cycle of many organisms includes a quiescent stage, such as bacterial or fungal spores, insect larvae, or plant seeds. Common to these stages is their low water content and high survivability during harsh conditions. Upon rehydration, organisms need to reactivate metabolism and protein synthesis. Plant seeds contain many mRNAs that are transcribed during seed development. Translation of these mRNAs occurs during early seed germination, even before the requirement of transcription. Therefore, stored mRNAs are postulated to be important for germination. How these mRNAs are stored and protected during long-term storage is unknown. The aim of this study was to investigate how mRNAs are stored in dry seeds and whether they are indeed translated during seed germination. We investigated seed polysome profiles and the mRNAs and protein complexes that are associated with these ribosomes in seeds of the model organism Arabidopsis (Arabidopsis thaliana). We showed that most stored mRNAs are associated with monosomes in dry seeds; therefore, we focus on monosomes in this study. Seed ribosome complexes are associated with mRNA-binding proteins, stress granule (SG), and P-body proteins, which suggests regulated packing of seed mRNAs. Interestingly, approximately 17% of the mRNAs that are specifically associated with monosomes are translationally up-regulated during seed germination. These mRNAs are transcribed during seed maturation, suggesting a role for this developmental stage in determining the translational fate of mRNAs during early germination
    Implementation of guidance on dossier evaluation for the registration of pest control products in Kenya
    Horst, Mechteld ter; Akinyi Aluoch, June ; Wanyonyi Barasa, Maurice ; Bosman-Hoefakker, Saskia ; Broeders, Jessica ; Etten, Jacobijn van; Jong, Esther de; Ngaruiya, Paul N. ; Steenbergh, Anne ; Valk, Harold van der; Wagate, Githaiga ; Muthoni Wambugu, Sarah ; Nekoye Waswa, Maureen ; Wipfler, Louise - \ 2019
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research report 2980) - ISBN 9789463952613 - 37
    This document describes suggestions for further steps that can be taken with regard to the evaluation of pest control products in Kenya. The document should be read together with the document describing proposed guidance on dossier evaluation for the registration of pest control products in Kenya and as such both contribute to a future complete pesticide evaluation manual for Kenya.Both documents were developed within the Pesticide management initiative East African Region: Kenya (PEAR -Kenya) project. The project ran in the period 2016 – 2019 and was sponsored and supported by the Dutch Ministry of Agriculture, Nature and Food Quality and the Embassy of the Netherlands in Nairobi.This document is intended to feed into discussions on further development of a complete pesticide evaluation manual for Kenya using the guidance mentioned as a starting point. Reflections on some of the methods proposed and also information on what is needed to implement the guidance developed in the project are provided. Additionally, suggestions for developing a framework for the risk assessment of aquatic organisms are given.
    Guidance on dossier evaluation for the registration of pest control products in Kenya
    Horst, Mechteld ter; Akinyi Aluoch, June ; Wanyonyi Barasa, Maurice ; Bosman-Hoefakker, Saskia ; Broeders, Jessica ; Etten, Jacobijn van; Jong, Esther de; Ngaruiya, Paul N. ; Steenbergh, Anne ; Valk, Harold van der; Wagate, Githaiga ; Muthoni Wambugu, Sarah ; Nekoye Waswa, Maureen ; Wipfler, Louise - \ 2019
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research report 2979) - ISBN 9789463952606 - 93
    This document describes guidance on dossier evaluation for the registration of pest control products in Kenya. The document provides guidance for the assessment of a limited number of aspects that are part of evaluation of a pest control product registration dossier. It should therefore not be considered as a complete pesticide evaluation manual, though it is intended to contribute to a future complete pest control product evaluation manual for Kenya. The guidance should be read together with an im plementation report which contains stepping stones for further development.The guidance was developed within the Pesticide management initiative East African Region: Kenya (PEAR -Kenya) project. The project ran in the period 2016 – 2019 and was sponsored and supported by the Dutch Ministry of Agriculture, Nature and Food Quality and the Embassy of the Netherlands in Nairobi.The guidance addresses various aspects of a pest control product evaluation covering low risk pest control products, microbial pest control product, chemical pest control products and equivalence determination. The evaluation procedures developed covers a fast-track pathway for low risk products. For microbial products the procedure focusses on identification, human pathology and infectiveness and hazard and risk assessments for metabolites of potential concern. For chemical products the procedure includes methods for human health and pollinator risk assessments. The evaluation process of new pest control products can be speeded up if the active ingredient or active agent of a new product proves to be equivalent to an already registered product.
    Modelinstrumentarium toelating Gewasbeschermingsmiddelen -TOXSWA model version 3.3. : Tussenrapportage WOT-04-008-024
    Horst, M.M.S. ter; Beltman, W.H.J. ; Adriaanse, P.I. ; Berg, F. van den - \ 2019
    Self-assessment Report : Wageningen Centre for Development Innovation 2019
    Guijt, W.J. ; Bruggeman, Hedwig ; Roosendaal, Lotte ; Horst, Judith van der; Dorp, M. van; Salverda, I.M. - \ 2019
    Wageningen : Wageningen Centre for Development Innovation, Wageningen University & Research (WCDI-19-065 ) - 83 p.
    Transcriptome and translatome profiling and translational network analysis during seed maturation reveals conserved transcriptional and distinct translational regulatory patterns
    Bai, B. ; Horst, Sjors van der; Delhomme, Nicolas ; Robles, A.V. ; Bentsink, L. ; Hanson, Johannes - \ 2019
    BioRxiv - 40 p.
    Seed maturation is an important plant developmental process that follows embryo development. It is associated with a series of physiological changes such as the establishment of desiccation tolerance, seed longevity and seed dormancy. However, the translational dynamics associated with seed maturation, especially its connection with seed germination remains largely elusive. Here transcriptome and translatome profiling were performed during seed maturation. During seed maturation we observed a gradual disappearance of polysomes and a relative increase of monosomes, indicating a gradual reduction of global translation. Comparing the levels of polysomal associated mRNAs with total mRNA levels showed that thousands of genes are translationally regulated at early sates of maturation, as judged by dramatic changes in polysomal occupancy. By including previous published data from germination and seedling establishment, a translational regulatory network: SeedTransNet was constructed. Network analysis identified hundreds of gene modules with distinct functions and transcript sequence features indicating the existence of separate translational regulatory circuits possibly acting through specific regulatory elements. The regulatory potential of one such element was confirmed in vivo. The network identified several seed maturation associated genes as central nodes, and we could confirm the importance of many of these hub genes with a maturation associated seed phenotype by mutant analysis. One of the identified regulators an AWPM19 family protein PM19-Like1 (PM19L1) was shown to regulate seed dormancy and longevity. This putative RBP also affects the transitional regulation of one its, by the SeedTransNet identified, target mRNAs. Our data shows the usefulness of SeedTransNet in identifying regulatory pathways during seed phase transitions
    Translational dynamics during seed maturation
    Bai, B. ; Horst, Sjors van der; Hanson, Johannes ; Bentsink, L. - \ 2019
    Wageningen University & Research
    Arabidopsis thaliana - GSE127509 - PRJNA524885
    We analysed the polysomal mRNA and total mRNA during Col-0 seed maturation The aim was to investigate the translational dynamics during seed maturation
    Fate specific mRNA storage in seeds
    Bai, B. ; Horst, Sjors van der; Cordewener, J.H.G. ; America, A.H.P. ; Hanson, J. ; Bentsink, L. - \ 2019
    Wageningen University & Research
    Arabidopsis thaliana - GSE76905 - PRJNA308911
    We analyzed the monsome and polysome associated transcripts of seeds and seedlings and identify transcripts specifically associated with monosome and polysome in both tissues. The aim was to generate a global view about the state of mRNA storage in the seeds and the their fate during seed germination
    Biodiversity in the Context of ‘Biodiversity – Mental Health’ Research
    Vries, Sjerp De; Snep, Robbert - \ 2019
    In: Biodiversity and Health in the Face of Climate Change / Marselle, Melissa R., Stadler, Jutta, Korn, Horst, Irvine, Katherine N., Bonn, Aletta, Springer International Publishing - ISBN 9783030023171 - p. 159 - 173.
    In this chapter the concept of biodiversity and its measurement and use in ‘biodiversity – mental health’ research is discussed, as well as access to and contact with biodiverse nature. It is pointed out that biodiversity is an ecological concept that originated in the context of nature conservation. It has evolved without consideration of its potential role in mental health promotion. In studying the latter, the concept of biodiversity is frequently adapted. Such adaptations are likely to occur at the expense of its relevance for nature conservation. Using the concept of biodiversity as originally intended may be fruitful for a different type of research question, focusing more on multi-functionality issues: can the same nature constitute a healthy, biodiverse ecosystem and enhance mental health simultaneously? By pointing out this and related issues, this chapter aims to support researchers and students in future research, and help both scientists and policy-makers to position and assess studies in this field.
    Educational Migrants, ICTs and Socio-Spatial Relationships: Establishing Presence from a Distance
    Horst, Hilje Van Der; Shadymanova, Jarkyn ; Sato, Chizu - \ 2019
    Journal of Asian and African Studies 54 (2019)4. - ISSN 0021-9096
    Previous research on transnational migration and information and communication technologies (ICTs) demonstrated how ICTs shape transnational social relationships. What remains less explored is how ICTs shape spatial dimensions of such relationships. Also, international educational migrants constitute a substantial part of transnational migration flow, yet their everyday lives are not well studied. Building upon material semiotic scholarship, we examine how ICTs shape socio-spatial dimensions of transnational relationships in the lives of educational migrants and the impacts that such relationships have on their everyday lives. This research is based on the empirical exploration of 21 in-depth interviews with educational migrants who came from Central Asian and African countries to the Netherlands. We show that spatial relationships, such as co-presence and distance, are not naturally ‘given’ but instead enacted in heterogeneous communication practices of educational migrants and these relationships produce both enabling and constraining effects on their everyday lives.
    Use of models for the environmental risk assessment of veterinary medicines in European aquaculture: Current situation and future perspectives
    Rico, Andreu ; Vighi, Marco ; Brink, Paul J. van den; Horst, Mechteld ter; Macken, Ailbhe ; Lillicrap, Adam ; Falconer, Lynne ; Telfer, Trevor C. - \ 2019
    Reviews in Aquaculture 11 (2019)4. - ISSN 1753-5123 - p. 969 - 988.
    Antimicrobials - Antiparasitics - Aquaculture - Environmental models - Environmental risk assessment

    Veterinary Medicinal Products (VMPs) are used in intensive aquaculture production to treat a wide range of bacterial and parasitic infestations. Their release into the environment poses concerns regarding their potential ecotoxicological risks to aquatic ecosystems, which need to be evaluated making use of appropriate Environmental Risk Assessment (ERA) schemes and models. This study presents an overview of the major aquaculture production systems in Europe, the VMPs most commonly used, and the environmental quality standards and regulatory procedures available for their ERA. Furthermore, it describes the state-of-the-art on the development of environmental models capable of assessing the fate, exposure, ecotoxicological effects and risks of VMPs in aquaculture production systems, and discusses their level of development and implementation within European aquaculture. This study shows that the use of environmental models in regulatory ERA is somewhat limited in many European countries. Major efforts have been dedicated to assess the fate and exposure of antiparasitic compounds in salmonid cage systems, particularly in Scotland, while models and scenarios for assessing dispersal of antimicrobials, in general, and antiparasitic compounds in the Mediterranean as well as in Scandinavian regions are less available. On the other hand, the use of ecological models for assessing the effects and risks of VMPs is almost absent. Recommendations are provided to improve the chemical exposure and effect assessments and the ecological realism of the modelling outcomes, paying special attention to the protection goals set for the regulatory ERA of VMPs in Europe.

    Modelinstrumentarium toelating Gewasbeschermingsmiddelen (TOXSWA) (2018). Tussenrapportage WOT-04-008-024.
    Horst, M.M.S. ter; Beltman, W.H.J. ; Adriaanse, P.I. ; Berg, F. van den - \ 2018
    WOT Natuur & Milieu (WOt-interne notitie 232)
    Manual for FOCUS_TOXSWA v5.5.3 and for expert use of TOXSWA kernel v3.3 : user’s guide version 5
    Beltman, W.H.J. ; Horst, M.M.S. ter; Adriaanse, P.I. ; Jong, A. de - \ 2018
    Wageningen : Statutory Research Tasks Unit for Nature & the Environment (WOt-technical report 126) - 148
    The FOCUS_TOXSWA model calculates exposure concentrations of pesticides and their metabolites in watercourses and ponds, of the so-called FOCUS surface water scenarios. These concentrations are used in the pesticide registration procedure at EU level. The model concepts of TOXSWA are described briefly. The procedure for using the TOXSWA kernel (i.e. expert use) and related input files and output files are described. Concerning FOCUS_TOXSWA, the use of the graphical user interface to access the input and output is described. Input data are stored in a database. Pesticide entries resulting from drainage or runoff/erosion are accessed from separate files generated by FOCUS_MACRO and FOCUS_PRZM. Substance properties are accessed from the SPIN tool/database. Instructions for simulating a water-sediment study and a multi-year run are given.
    Pesticide management in Rwanda : analysis of the current pest control products administration and management system
    Wipfler, Louise ; Horst, Mechteld ter - \ 2018
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research report 2904) - 37
    This report describes the assessment of the current pest control products administration and management system in Rwanda. The assessment includes the aspects pesticide registration and evaluation, inspection and control and waste management. Roles, responsibilities and capacities of the public institutions involved are evaluated and current Rwandan legislations, regulations and procedures on pest control products are reviewed based on a series of consults and/or interviews with public and private institutions, actors and stakeholders in Rwanda. Finally, a set of observations and recommendations for improvement is provided based on the assessment.
    Gewassen in de overlevingsmodus
    Zondag, Harold - \ 2018
    Scenarios for exposure of aquatic organisms to plant protection products in the Netherlands : Part 2: Sideways and upward spraying in Dutch fruit crops (interim report)
    Boesten, J.J.T.I. ; Holterman, H.J. ; Wipfler, L. ; Horst, M.M.S. ter; Zande, J.C. van de; Adriaanse, P.I. - \ 2018
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research report 2861) - 55
    A methodology is presented to assess the exposure of aquatic organisms resulting from pesticide applications by sideways and upward spraying in Dutch fruit crops. It is the intention that this methodology will be used in Dutch pesticide registration. The methodology is based on the principle that the endpoint concentration represents a 90th percentile of the statistical population of concentrations to be expected in ditches alongside fruit crops. Furthermore the methodology is founded on the principle that the user should be able to choose between different drift-reduction technology (DRT) classes and between different widths of the crop-free buffer zone. Spray drift is the only exposure route considered in the methodology. The 90th percentile concentration (PEC90) is based on a spatially distributed model that simulates the frequency distribution of the annual maximum concentration of more than 70,000 spatial units (i.e. ditches characterised by waterbody properties and their orientation with respect to the direction of the rows of the fruit trees and to the N-E-S-W direction) for 100 simulation years. This frequency distribution was calculated for different application patterns, different DRT classes and different widths of the crop-free buffer zone. Next, one of the 70,000 spatial units was selected which fulfilled the criterion that it could be used to calculate this PEC90 for all combinations of application patterns, DRT classes and widths by selecting a suitable percentile of its temporal distribution of concentrations. The TOXSWA model (coupled to the hydrological SWQN model simulating water depths and water flow rates) was parameterised for this selected spatial unit to run for 26 years. The first six years were used as a ‘warming-up’ period and the remaining 20 years for assessing the required temporal percentile. The scenario ditch was 300 m long of which only the 100 m in the middle received a drift load of pesticide. The direction of water flow may change on a daily basis and the water flowing into the 300-m ditch was assumed to be free of pesticide. The median residence time of a droplet of water in the 100-m ditch was about 1 day. The
    spray drift deposition for the 99% DRT class appeared to be as low as 0.03-
    0.07% for summer applications. At such low deposition levels the contribution of leaching from drain pipes and of atmospheric deposition may exceed that of the drift deposition.
    Risk reduction of pesticides in Myanmar : interim report of the Dutch-Myanmar project of pesticide registration and pesticide risk reduction 2016-2018
    Horst, Mechteld ter; Deneer, John ; Valk, Harold van der; Kyaw Oo, Aung ; San Lwin, San ; Raw, Sen ; Krook, Janhendrik - \ 2018
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research report 2879) - 143
    Ditch parameterisation for the aquatic exposure assessment of plant protection products in the Netherlands by sideways and upward spraying in fruit orchards
    Wipfler, Louise ; Horst, Mechteld ter; Massop, Harry ; Walvoort, Dennis - \ 2018
    Wageningen : Wageningen Environmental Research (Wageningen Environmental Research rapport 2850) - 107
    History and Institutions in the Rebuilding of Social Capital after Forced Resettlement in the Philippines and Indonesia
    Navarra, Melissa Quetulio ; Niehof, Anke ; Vaart, Wander van der; Horst, Hilje van der; Moerbeek, Hester - \ 2018
    Journal of Development Studies 54 (2018)8. - ISSN 0022-0388 - p. 1392 - 1405.

    Resettlement results in the loss of social capital from which poor households can draw resources for sustenance, survival and wellbeing. While Putnam deems social capital formation as pre-determined by a community’s history of civic engagement, the institutional view argues that social capital is generated through the institutions’ interventions. Utilising a comparative approach involving two resettlement sites, one in the Philippines and one in Indonesia, this article presents findings on the explanatory power of these two perspectives. The Philippine case is greatly influenced by the institutional interventions while the Indonesian case testifies to the validity of the theoretical perspective of Putnam.

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