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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    Acute porcine epidemic diarrhea virus infection reshapes the intestinal microbiota
    Yang, Shanshan ; Li, Yang ; Wang, Bin ; Yang, Ning ; Huang, Xin ; Chen, Qingbo ; Geng, Shuxian ; Zhou, Yawei ; Shi, Han ; Wang, Leyi ; Brugman, Sylvia ; Savelkoul, Huub ; Liu, Guangliang - \ 2020
    Virology 548 (2020). - ISSN 0042-6822 - p. 200 - 212.
    Intestinal microbiota - Pathogenicity - Porcine epidemic diarrhea virus

    The intestinal microbiota is crucial to intestinal homeostasis. Porcine epidemic diarrhea virus (PEDV) is high pathogenic to intestines, causing diarrhea, even death in piglets. To investigate the detailed relationship between PEDV infection and intestinal microbiota, the composition and distribution of intestinal microbiota from pigs were first analyzed using 16S rRNA sequencing technology. The results demonstrated that the composition and distribution of microbes in different intestinal segments were quite similar between 1-week-old and 2-week-old piglets but different from 4-week-old (weaned) piglets. Then piglets at different ages were inoculated with PEDV. The results showed that the 1-week-old piglets exhibited the most severe pathogenicity comparing to the other age groups. Further investigations indicated that Lactobacillus, Escherichia coli, and Lactococcus in the intestinal microbiota of piglets were significantly changed by PEDV infection. These results strengthen our understanding of viruses influencing intestinal microbes and remind us of the potential association between PEDV and intestinal microbes.

    SoilGrids250m: Global gridded soil information based on machine learning
    Hengl, T. ; Mendes de Jesus, J.S. ; Heuvelink, G.B.M. ; Ruiperez Gonzalez, M. ; Kilibarda, Milan ; Blagotic, Aleksandar ; Wei, Shangguan ; Wright, Marvin N. ; Geng, Xiaoyuan ; Bauer-Marschallinger, Bernhard ; Guevara, Mario Antonio ; Vargas, Rodrigo ; MacMillan, Robert A. ; Batjes, N.H. ; Leenaars, J.G.B. ; Carvalho Ribeiro, E.D. ; Wheeler, Ichsani ; Mantel, S. ; Kempen, B. - \ 2017
    PLoS ONE 12 (2017)2. - ISSN 1932-6203 - 40 p.
    This paper describes the technical development and accuracy assessment of the most recent and improved version of the SoilGrids system at 250m resolution (June 2016 update). SoilGrids provides global predictions for standard numeric soil properties (organic carbon, bulk density, Cation Exchange Capacity (CEC), pH, soil texture fractions and coarse fragments) at seven standard depths (0, 5, 15, 30, 60, 100 and 200 cm), in addition to predictions of depth to bedrock and distribution of soil classes based on the World Reference Base (WRB) and USDA classification systems (ca. 280 raster layers in total).
    Dietary fibre enrichment from defatted rice bran by dry fractionation
    Wang, Jue ; Suo, Geng ; Wit, Martin de; Boom, Remko M. ; Schutyser, Maarten A.I. - \ 2016
    Journal of Food Engineering 186 (2016). - ISSN 0260-8774 - p. 50 - 57.
    Dietary fibre - Dry fractionation - Electrostatic separation - Oil binding capacity - Swelling capacity - Water retention capacity

    Defatted rice bran is excellent source of dietary fibre. The mostly used lab-scale method to extract dietary fibre is not very efficient; dry fractionation is a more energy efficient alternative at larger scale. Three separation routes were studied: two-step electrostatic separation, sieving and a combination of electrostatic separation and sieving. All yielded fibre-enriched fractions with similar yield (20-21%) and purity (67-68% dm), which recovered 42-48% of the fibre from original rice bran flour. The enriched fraction obtained by two-step electrostatic separation contained more small particles and possibly different DF composition compared to the other two, which resulted in different functional properties. Compared to dietary fibre extracted by enzymatic-gravimetric method, enriched fractions by dry fractionation have a similar water retention capacity and oil bind capacity. This suggests that fibre-enriched fractions by dry fractionation can be applied in foods and provide similar technological and physiological properties as wet-extracted dietary fibre does.

    Atmospheric-Pressure Chemical Ionization Tandem Mass Spectrometry (APGC/MS/MS) an Alternative to High-Resolution Mass Spectrometry (HRGC/HRMS) for the Determination of Dioxins
    Bavel, Bert Van; Geng, Dawei ; Cherta, Laura ; Nácher-Mestre, Jaime ; Portolés, Tania ; Ábalos, Manuela ; Sauló, Jordi ; Abad, Esteban ; Dunstan, Jody ; Jones, Rhys ; Kotz, Alexander ; Winterhalter, Helmut ; Malisch, Rainer ; Traag, Wim ; Hagberg, Jessika ; Ericson Jogsten, Ingrid ; Beltran, Joaquim ; Hernández, Félix - \ 2015
    Analytical Chemistry 87 (2015)17. - ISSN 0003-2700 - p. 9047 - 9053.

    The use of a new atmospheric-pressure chemical ionization source for gas chromatography (APGC) coupled with a tandem quadrupole mass spectrometry (MS/MS) system, as an alternative to high-resolution mass spectrometry (HRMS), for the determination of PCDDs/PCDFs is described. The potential of using atmospheric-pressure chemical ionization (APCI) coupled to a tandem quadrupole analyzer has been validated for the identification and quantification of dioxins and furans in different complex matrices. The main advantage of using the APCI source is the soft ionization at atmospheric pressure, which results in very limited fragmentation. APCI mass spectra are dominated by the molecular ion cluster, in contrast with the high energy ionization process under electron ionization (EI). The use of the molecular ion as the precursor ion in MS/MS enhances selectivity and, consequently, sensitivity by increasing the signal-to-noise ratios (S/N). For standard solutions of 2,3,7,8-TCDD, injections of 10 fg in the splitless mode on 30- or 60-m-length, 0.25 mm inner diameter (id), and 25 μm film thickness low-polarity capillary columns (DB5MS type), signal-to-noise (S/N) ratios of >10:1 were routinely obtained. Linearity was achieved in the region (correlation coefficient of r2 > 0.998) for calibration curves ranging from 100 fg/μL to 1000 pg/μL. The results from a wide variety of complex samples, including certified and standard reference materials and samples from several QA/QC studies, which were previously analyzed by EI HRGC/HRMS, were compared with the results from the APGC/MS/MS system. Results between instruments showed good agreement both in individual congeners and toxic equivalence factors (TEQs). The data show that the use of APGC in combination with MS/MS for the analysis of dioxins has the same potential, in terms of sensitivity and selectivity, as the traditional HRMS instrumentation used for this analysis. However, the APCI/MS/MS system, as a benchtop system, is much easier to use. (Figure Presented).

    Setting environmental criteria for risk assessment : evaluation of Chinese environmental risk assessment procedures
    Valk, H. ; Tao, C. ; Geng, Y. ; Ma, J. ; Zhou, R. ; Jia, R. ; Liu, Y. ; Li, C. ; Li, W. ; Yan, L. ; Ma, X. ; Qu, M. ; Piao, X. ; Horst, M.M.S. ter; Pol, W. - \ 2014
    Wageningen : Alterra, Wageningen-UR (Alterra-rapport 2560) - 85
    risicoschatting - pesticiden - registratie - grondwater - china - risk assessment - pesticides - registration - groundwater - china
    Modeling environmental and human health risks of veteriary medicinal products applied in pond aquaculture
    Rico Artero, A. ; Geng, Y. ; Focks, A. ; Brink, P.J. van den - \ 2013
    Environmental Toxicology and Chemistry 32 (2013)5. - ISSN 0730-7268 - p. 1196 - 1207.
    organic-chemicals - biological products - rate constants - pharmaceuticals - water - antibiotics - rates
    A model called ERA-AQUA was developed to assess the risks posed by the use of veterinary medicinal products (VMPs) applied in aquaculture ponds for the targeted produce, surrounding aquatic ecosystems, consumers, and trade of the aquaculture produce. The model calculates risks by following a risk quotient approach, calculating predicted exposure concentrations (exposure assessment) and predicted no-effect concentrations (effect assessment) for the endpoint under study. The exposure assessment is performed by combining information on the environmental characteristics of the aquaculture pond, characteristics of the cultured species, aquaculture management practices, and physicochemical properties of the compound under study. The model predicts concentrations of VMPs in the pond water, pond sediment, cultured species, and watercourse receiving pond effluent discharges by mass balance equations. The effect assessment is performed by combining (eco)toxicological information and food safety threshold concentrations for the studied compound. In the present study, the scientific background, strengths, and limitations of the ERA-AQUA model are presented together with a sensitivity analysis and an example showing its potential applications.
    ERA-AQUA version 2.0, technical description and manual : a decision support system for the environmental risk assessment of veterinary medicines applied in pond AQUAculture
    Rico Artero, A. ; Geng, Y. ; Focks, A. ; Brink, P.J. van den - \ 2012
    Wageningen : Alterra (Alterra-report 2320) - 63
    waterverontreiniging - geneesmiddelen - veterinaire producten - milieubescherming - risicoschatting - water pollution - drugs - veterinary products - environmental protection - risk assessment
    Veterinary medicinal products are applied in aquaculture production for treating and preventing diseases in the cultured species. Veterinary medicines may enter the environment by effluent discharges, posing a potential risk for surrounding aquatic ecosystems. Furthermore, human health and the trade of the aquaculture produce can be negatively affected by the presence of residues of veterinary medicines in the cultured organisms. The ERA-AQUA Decision Support System was developed to estimate risks of veterinary medicinal products applied in pond aquaculture for the targeted produce, surrounding aquatic ecosystems, consumers and trade. The risk assessment is expressed by risk quotients, which are calculated by dividing the predicted exposure concentration by the predicted no effect concentration calculated for each endpoint. This report provides a mathematical description of the processes incorporated in the ERA-AQUA Decision Support System and a user’s manual.
    Pierre Wind gaat obesitas bestrijden in China - Smaaklessen
    Meester, H.J. ; Regelink, M.H. - \ 2010
    Algemeen Dagblad (2010). - 1 p.
    De Nederlandse kok PIerre Wind gaat op 4 juni smaakles geven in Shanghai. Hij doet dit samen met de Chinese topkok Deng Bo Geng. De twee culinaire zwaargewichten willen hiermee wereldwijd aandacht vragen voor de bestrijding van obesitas.
    Analysis and simulation of weather variables
    Geng, S. ; Penning de Vries, F.W.T. ; Supit, I. - \ 1985
    Wageningen : CABO [etc.] (Simulation reports CABO-TT no. 4, 5)
    meteorologie - computersimulatie - simulatie - simulatiemodellen - meteorology - computer simulation - simulation - simulation models
    Analysis and simulation of weather variables; part II: temperature and solar radiation
    Shu Geng, R.R. ; Penning de Vries, F.W.T. ; Supit, I. - \ 1985
    Unknown Publisher - 74 p.
    Analysis and simulation of weather variables; part I: rain and wind in Wageningen
    Shu Geng, R.R. ; Penning de Vries, F.W.T. ; Supit, I. - \ 1985
    Unknown Publisher - 55 p.
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