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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    Sobere herinrichting van waterschapswegen werkt; aantal ongevallen daalt met 24 procent (internetartikel)
    Jaarsma, C.F. ; Dijkstra, A. ; Louwerse, W.J.R. ; Vries, J.R. de - \ 2011
    Verkeerskunde 2011 (2011)6. - ISSN 0377-8495 - 7 p.
    Sobere herinrichting van waterschapswegen werkt; aantal ongevallen daalt met 24%
    Jaarsma, C.F. ; Dijkstra, A. ; Louwerse, W.J.R. ; Vries, J.R. de - \ 2011
    Verkeerskunde 2011 (2011)62. - ISSN 0377-8495 - p. 53 - 53.
    Making minor rural road networks safer: The effects of 60 km/h-zones
    Jaarsma, C.F. ; Louwerse, W.J.R. ; Dijkstra, A. ; Vries, J.R. de; Spaas, J.P. - \ 2011
    Accident Analysis and Prevention 43 (2011)4. - ISSN 0001-4575 - p. 1508 - 1515.
    speed limits - accidents
    For safety reasons a maximum speed limit of 60km/h has been applied to minor rural roads in the Netherlands since 1998. To support this structurally, a part of these roads have also received additional physical measures in a so-called "low cost design" that is expected to reduce the number of traffic casualties by 10-20%. This measure has been implemented as much as possible in an area oriented way. To measure the design's effectivity, road safety in 20 specific rural areas was studied for 5 years before changes were implemented and, on average, 3.5 years thereafter. The study examined 851km of roads, and a control study was done on 2105km of comparable roads with a speed limit of 80km/h. Both the study and the control roads are managed by water boards. Results show that the measures implemented on the roads in the 60km/h-zones had statistically significant effects (p
    Biohydrogen production from beet molasses by sequential dark and photofermentation
    Özgür, E. ; Mars, A.E. ; Peksel, B. ; Louwerse, A. ; Yücel, M. ; Gündüz, U. ; Claassen, P.A.M. ; Eroglu, I. - \ 2010
    International Journal of Hydrogen Energy 35 (2010)2. - ISSN 0360-3199 - p. 511 - 517.
    rhodobacter-sphaeroides ou001 - ethanol-type fermentation - hydrogen-production - caldicellulosiruptor-saccharolyticus - anaerobic fermentation - photo-fermentation - capsulatus - bioreactor - pathway - reactor
    Biological hydrogen production using renewable resources is a promising possibility to generate hydrogen in a sustainable way. In this study, a sequential dark and photofermentation has been employed for biohydrogen production using sugar beet molasses as a feedstock. An extreme thermophile Caldicellulosiruptor saccharolyticus was used for the dark fermentation, and several photosynthetic bacteria (Rhodobacter capsulatus wild type, R. capsulatus hup- mutant, and Rhodopseudomonas palustris) were used for the photofermentation. C. saccharolyticus was grown in a pH-controlled bioreactor, in batch mode, on molasses with an initial sucrose concentration of 15 g/L. The influence of additions of NH4+ and yeast extract on sucrose consumption and hydrogen production was determined. The highest hydrogen yield (4.2 mol of H2/mol sucrose) and maximum volumetric productivity (7.1 mmol H2/Lc.h) were obtained in the absence of NH4+. The effluent of the dark fermentation containing no NH4+ was fed to a photobioreactor, and hydrogen production was monitored under continuous illumination, in batch mode. Productivity and yield were improved by dilution of the dark fermentor effluent (DFE) and the additions of buffer, iron-citrate and sodium molybdate. The highest hydrogen yield (58% of the theoretical hydrogen yield of the consumed organic acids) and productivity (1.37 mmol H2/Lc.h) were attained using the hup- mutant of R. capsulatus. The overall hydrogen yield from sucrose increased from the maximum of 4.2 mol H2/mol sucrose in dark fermentation to 13.7 mol H2/mol sucrose (corresponding to 57% of the theoretical yield of 24 mol of H2/mole of sucrose) by sequential dark and photofermentation.
    A systematic quantification of the sources of variation of process analytical measurements in the steel industry
    Jellema, R.H. ; Louwerse, D.J. ; Smilde, A.K. ; Gerritsen, M.J.P. ; Guldemond, D. ; Voet, H. van der; Vereijken, P.F.G. - \ 2003
    Quality Engineering 15 (2003)3. - ISSN 0898-2112 - p. 391 - 402.
    A strategy is proposed for the Identification and quantification of sources of variation in a manufacturing process. The strategy involves six steps: identification and selection of factors, model selection, design of the experiments, performing the experiments, estimation of sources of variation, and finally, interpretation of the results. This strategy helps in finding those factors that contribute mostly to the total variation apparent in analysis results due to the production process itself, sampling, and analysis of samples. The strategy is then applied to a case study in which sources of variation in steel analysis are identified and quantified. The study develops mixed (random and fixed) effect models for the three phases of steel manufacturing - stirring, tundish, and mold. The models show that differences between spectrometers can have an important influence on the total variation apparent in the final analysis results.
    Wild koniks or tame tarpans? A behavioural comparison between the konik horses from Popielno, Poland and koniks in nature reserves in the Netherlands
    Koene, P. ; Pasmooij, M. ; Louwerse, J. ; Reinders, J. - \ 2002
    In: Proceedings of the 36th International Congress of the ISAE, Egmond aan Zee, The Netherlands. - Wageningen : Ponsen en Looijen, 2002 - p. 73 - 73.
    Exposure to fungicides in fruit growing : re-entry time as a predictor for dermal exposure
    Tielemans, E. ; Louwerse, E. ; Cock, J. de; Brouwer, D. ; Heederik, D. ; Zielhuis, G. - \ 1999
    American Industrial Hygiene Association Journal 60 (1999). - ISSN 0002-8894 - p. 789 - 793.
    Influence of monochlorophenols on methanogenic activity in granular sludge.
    Ennik-Maarsen, K.A. ; Louwerse, A. ; Roelofsen, W. ; Stams, A.J.M. - \ 1998
    Water Research 32 (1998). - ISSN 0043-1354 - p. 2977 - 2982.
    Effects of surfaces on the degradation of 3-chlorobenzoate by a defined consortium.
    Maarsen, K.A. ; Louwerse, A. ; Stams, A.J.M. - \ 1996
    In: Abstract 96th General Meeting of the ASM, New Orleans, USA - p. 412 - 412.
    Phosphorus fixation in lake sediments; the case of Lake Veluwe, The Netherlands.
    Danen-Louwerse, H.J. ; Portielje, R. ; Lijklema, L. - \ 1996
    Wageningen : Agricultural University - 115
    meren - reservoirs - plassen - adsorptie - sorptie - fosfor - bibliografieën - nederland - waterbodems - lakes - ponds - adsorption - sorption - phosphorus - bibliographies - netherlands - water bottoms
    Coprecipitation of phosphate with calcium carbonate in Lake Veluwe.
    Danen-Louwerse, H.J. ; Lijklema, L. ; Coenraats, M. - \ 1995
    Water Research 29 (1995). - ISSN 0043-1354 - p. 1781 - 1785.
    meren - reservoirs - plassen - water - waterverontreiniging - waterkwaliteit - eutrofiëring - fosfaten - fosforpentoxide - derivaten - nederland - biologisch waterbeheer - lakes - reservoirs - ponds - water - water pollution - water quality - eutrophication - phosphates - phosphorus pentoxide - derivatives - netherlands - biological water management
    Reduction of artificial iron(III) phosphate complexes by hydroxylammonium chloride.
    Best, J. de; Danen-Louwerse, H.J. ; Portielje, R. ; Lijklema, L. - \ 1995
    Water Research 29 (1995). - ISSN 0043-1354 - p. 1885 - 1894.
    fosfaten - fosforpentoxide - derivaten - ijzer - absorptie - adsorptie - waterbodems - phosphates - phosphorus pentoxide - derivatives - iron - absorption - adsorption - water bottoms
    Toxicity of chlorinated aromatics to methanogenic consortia.
    Maarsen, K.A. ; Louwerse, A. ; Stams, A.J.M. - \ 1994
    In: Abstract Meeting Soc. Gen. Microbiology and Ned. Ver. Microbiologie, Noordwijkerhout, The Netherlands - p. 41 - 41.
    Iron content of sediment and phosphate adsorption properties.
    Danen-Louwerse, H. ; Lijklema, L. ; Coenraats, M. - \ 1993
    Hydrobiologia 253 (1993). - ISSN 0018-8158 - p. 311 - 317.
    Incorporation of dechlorinating bacteria into methanogenic granular sludge.
    Maarsen, K.A. ; Louwerse, A. ; Stams, A.J.M. - \ 1993
    In: Abstract VAAM Meeting. Bioengineering, Leipzig, Germany / Gräfelfing, - p. 59 - 59.
    Analysis of the region in between two closely linked patatin genes: class II promoter activity in tuber, root and leaf.
    Nap, J.P.H. ; Diekse, W.G. ; Louwerse, J. ; Onstenk, J. ; Visser, R.G.F. ; Loonen, A. ; Heidekamp, F. ; Stiekema, W.J. - \ 1992
    Plant Molecular Biology 20 (1992). - ISSN 0167-4412 - p. 683 - 694.
    Cerebral glucose metabolization during conditioned sexual arousal in the male rat.
    Jonge, F.H. de; Tonnaer, J.A.D.M. ; Leeuwe, H. van; Tielemans, A.J.P.C. ; Louwerse, A.L. ; Poll, N.E. van de - \ 1992
    Physiology and Behavior 52 (1992)1. - ISSN 0031-9384 - p. 1009 - 1013.
    De relatie tussen de bodemvruchtbaarheidsparameters Pw- en P-AL-getal, en fosfaatverzadiging bij zandgronden
    Schoumans, O.F. ; Breeuwsma, A. ; Bachrioui - Louwerse, A. El - \ 1991
    Wageningen : DLO-Staring Centrum (Rapport / DLO-Staring Centrum 112) - 67
    nederland - fosfor - kwantitatieve technieken - zandgronden - bodem - grondanalyse - bodemoplossing - netherlands - phosphorus - quantitative techniques - sandy soils - soil - soil analysis - soil solution
    Crop photosynthesis, respiration and dry matter production of maize.
    Louwerse, W. ; Sibma, L. ; Kleef, J. van - \ 1990
    Netherlands Journal of Agricultural Science 38 (1990)2. - ISSN 0028-2928 - p. 95 - 108.
    Bacteroid-encoded proteins are secreted into the peribacteroid space by Rhizobium leguminosarum.
    Katinakis, P. ; Klein Lankhorst, R.M. ; Louwerse, J. ; Kammen, A. van; Bos, R.C. van den - \ 1988
    Plant Molecular Biology 11 (1988). - ISSN 0167-4412 - p. 183 - 190.
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