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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    Resilience of aquatic systems under biological invasions
    Nagelkerke, L.A.J. ; Pollux, B.J.A. ; Fleuren, M. - \ 2018
    - 1 p.
    Resilience of aquatic ecosystems under biological invasions
    Nagelkerke, L.A.J. ; Fleuren, M. ; Pollux, B.J.A. - \ 2018
    Resilience in bio-based production systems
    Nagelkerke, Leo - \ 2018
    Resilience in the core domains of WUR
    Kemp, Bas - \ 2018
    Resilicience of aquatic ecosystems under biological invasions: from ecosystems to genomes
    Nagelkerke, Leo - \ 2018
    Power-sensitive resilience in flood-prone deltas
    Dewulf, A.R.P.J. ; Karpouzoglou, T.D. ; Warner, J.F. ; Hoang, P.L. ; Binh Nguyen Thanh, ; Tri, Van Pham Dang ; Ahmed, Farhana ; Wesselink, Anna ; Vos, J.M.C. ; Mao, Feng ; Buytaert, Wouter ; Tamas, P.A. ; Vij, S. ; Groot, A.M.E. ; Heijmans, E.P.M. - \ 2018
    Application of field blanks in odour emission research
    Ogink, Nico W.M. ; Klarenbeek, Johannes V. - \ 2016
    Chemical Engineering Transactions 54 (2016). - ISSN 1974-9791 - p. 25 - 30.

    In the Netherlands field blanks are mandatory when sampling odour emission. Field blanks are matrices that have negligible or unmeasurable amounts of the substance of interest. They are used to document possible contamination during sampling, transport and storage of samples. Although field blanks are well established in odour emission research, interpreting the results needs further attention. This can be attributed to the fact that published information on the topic is rare if not absent. In the present study, general statistical measures of field blanks used in odour measurement research, are reported. The objective of the study was to provide insight in the distribution of field blank values. During 2013 and 2014, field blanks were analysed as part of regular investigations into odour emissions. Point sources were most frequently observed (87%), as well as the use of diluting stack samplers (72%). It was found that average odour concentration and standard deviation of the dataset were 1.39 and 0.379 log(ouE/m3) respectively, both expressed on a logarithmic scale (base 10). Median values of odour concentration of field blanks taken with stack sampler methods, differed significantly from lung sample methods, being a factor two higher. Since the implementation of stack sampler methods requires more processing aids than the lung method, the chances are that that traces of odour are carried over from one sampling sessions to another. This stresses the need for effective cleaning of sampling equipment between sampling sessions.

    Odor measurements according to EN 13725: a statistical analysis of variance components
    Klarenbeek, J.V. ; Ogink, N.W.M. ; Voet, H. van der - \ 2014
    Atmospheric Environment 86 (2014). - ISSN 1352-2310 - p. 9 - 15.
    olfactory sensitivity - performance - threshold - emission
    In Europe, dynamic olfactometry, as described by the European standard EN 13725, has become the preferred method for evaluating odor emissions emanating from industrial and agricultural sources. Key elements of this standard are the quality criteria for trueness and precision (repeatability). Both are linked to standard values of n-butanol in nitrogen. It is assumed in this standard that whenever a laboratory complies with the overall sensory quality criteria for n-butanol, the quality level is transferable to other, environmental, odors. Although olfactometry is well established, little has been done to investigate inter laboratory variance (reproducibility). Therefore, the objective of this study was to estimate the reproducibility of odor laboratories complying with EN 13725 as well as to investigate the transferability of n-butanol quality criteria to other odorants. Based upon the statistical analysis of 412 odor measurements on 33 sources, distributed in 10 proficiency tests, it was established that laboratory, panel and panel session are components of variance that significantly differ between n-butanol and other odorants (a = 0.05). This finding does not support the transferability of the quality criteria, as determined on n-butanol, to other odorants and as such is a cause for reconsideration of the present single reference odorant as laid down in EN 13725. In case of non-butanol odorants, repeatability standard deviation (sr) and reproducibility standard deviation (sR) were calculated to be 0.108 and 0.282 respectively (log base-10). The latter implies that the difference between two consecutive single measurements, performed on the same testing material by two or more laboratories under reproducibility conditions, will not be larger than a factor 6.3 in 95% of cases. As far as n-butanol odorants are concerned, it was found that the present repeatability standard deviation (sr = 0.108) compares favorably to that of EN 13725 (sr = 0.172). It is therefore suggested that the repeatability limit (r), as laid down in EN 13725, can be reduced from r = 0.477 to r = 0.31.
    Crisis in aantocht! : een interactioneel perspectief op crisiscommunicatie
    Klarenbeek, J.M.E. - \ 2012
    Wageningen University. Promotor(en): Cees van Woerkum, co-promotor(en): Hedwig te Molder. - [S.l. : S.n. - ISBN 9789461732361 - 223
    crises - bedrijfsvoering - sociaal conflict - conflictmanagement - communicatie - rijksoverheid - nederland - crises - management - social conflict - conflict management - communication - central government - netherlands
    De overheid wil klokkenluiders via regels en procedures beschermen. Denk aan het recente wetsvoorstel ‘Huis voor Klokkenluiders’. Toch kan er veel mis gaan. Klokkenluiders lopen bijvoorbeeld het risico dat hun signaal niet wordt opgepikt. Annette Klarenbeek, richtte haar promotieonderzoek op de wijze waarop de klokkenluider zich verantwoordt ten opzichte van de vaak vijandige buitenwereld. Dit deed zij aan de hand van twee geanalyseerde praktijkvoorbeelden uit de crisiscommunicatie Bepaalde actoren die crisis kunnen signaleren en daarover anderen willen waarschuwen worden in haar onderzoek als ‘crisismakelaars’ opgevat. Veelal zitten deze personen met bepaalde interactionele problemen om een crisis aan te kaarten. Iemand die een probleem aankaart kan bijvoorbeeld worden aangezien voor zwartkijker, klikspaan of heethoofd,’ benoemt Annette Klarenbeek. ‘Klokkenluiders moeten duidelijk maken dat het de moeite waard is te luisteren naar wat zij zeggen, dat het waar is wat zij naar voren brengen en vooral dat ze zich verantwoordelijk voelen voor de omgeving.’ Haar studie concentreert zich op crisismakelaars. Dit zijn personen die een misstand zien en die bij anderen willen overbrengen. Kenmerkend voor crisismakelaars is dat zij hun zorgen over een potentiële crisissituatie op eigen initiatief presenteren. Meerwaarde onderzoek. Het onderzoek van Annette Klarenbeek toont aan dat organisaties de communicatieproblemen van crisismakelaars beter kunnen herkennen. Door hier in een vroeg stadium op te anticiperen, krijgt een organisatie beter zicht op hoe een crisis zich kan ontwikkelen. ‘
    Compensating biodiversity loss : Dutch companies’ experience with biodiversity compensation, including their supply chain : the ‘BioCom’ project
    Bie, S. de; Schaick, J. van - \ 2011
    Klarenbeek : De Gemeynt - 129
    natuurontwikkeling - biodiversiteit - natuurcompensatie - particuliere organisaties - nature development - biodiversity - nature compensation - private organizations
    Compensation for damage to biodiversity is a relatively new topic in the business environment. Most private sector companies dealing with compensation do so because of a legal obligation. Companies are increasingly becoming aware, though, that our welfare and well-being depend on healthy ecosystems and biodiversity. Also, from a Corporate Social Responsibility (CSR) point of view, companies start to realize that securing continued access to natural resources is a key factor to their profitability. This inspires more and more companies to take up the challenge to start a project aiming to voluntarily compensate for biodiversity loss or damage
    Compensation for biodiversity loss: Advice to the Netherlands' Taskforce on Biodiversity and Natural Resources
    Bie, S. de; Dessel, B. van - \ 2011
    Klarenbeek : De Gemeynt - 69
    natuurontwikkeling - biodiversiteit - natuurcompensatie - particuliere organisaties - nature development - biodiversity - nature compensation - private organizations
    Compensation of damage to biodiversity is one of the mechanisms to settle environmental costs. It concerns creating new opportunities for biodiversity, which as a minimum equals the residual impact after a company or organization has attempted to avoid, prevent and mitigate that impact. In the Netherlands, voluntary compensation of biodiversity loss is very new and under development. No legal frameworks, regulations nor formal guidelines apply. Lessons are learned from voluntary biodiversity compensation pilots. „Barriers‟ to a broad support among companies for the compensation of biodiversity loss due to their activities have to be removed. Communication, clarity on the interface with other government-driven initiatives, and financial incentives are among the required measures.
    Een No Net Loss Plan voor de Havenuitbreiding Den Helder
    Bie, S. de; Dessel, B. van - \ 2011
    Klarenbeek : De Gemeynt - 45 p.
    Expression of receptors for luteinizing hormone, gastric-inhibitory polypeptide, and vasopressin in normal adrenal glands and cortisol-secreting adrenocortical tumors in dogs
    Galac, S. ; Kars, V.J. ; Klarenbeek, S. ; Teerds, K.J. ; Mol, J.A. ; Kooistra, H.S. - \ 2010
    Domestic Animal Endocrinology 39 (2010)1. - ISSN 0739-7240 - p. 63 - 75.
    dependent cushings-syndrome - sufficient genetic event - canine hyperadrenocorticism - in-vitro - hyperplasia - cells - overexpression - proliferation - desmopressin - sensitivity
    Hypercortisolism caused by an adrenocortical tumor (AT) results from adrenocorticotropic hormone (ACTH)-independent hypersecretion of glucocorticoids. Studies in humans demonstrate that steroidogenesis in ATs may be stimulated by ectopic or overexpressed eutopic G protein-coupled receptors. We report on a screening of 23 surgically removed, cortisol-secreting ATs for the expression of receptors for luteinizing hormone (LH), gastric-inhibitory polypeptide (GIP), and vasopressin (V1a, V1b, and V2). Normal adrenal glands served as control tissues. Abundance of mRNA for these receptors was quantified using quantitative polymerase chain reaction (QPCR), and the presence and localization of these receptors were determined by immunohistochemistry. In both normal adrenal glands and ATs, mRNA encoding for all receptors was present, although the expression abundance of the V1b receptor was very low. The mRNA expression abundance for GIP and V2 receptors in ATs were significantly lower (0.03 and 0.01, respectively) than in normal adrenal glands. The zona fasciculata of normal adrenal glands stained immunonegative for the GIP receptor. In contrast, islands of GIP receptor-immunopositive cells were detected in about half of the ATs. The zona fasciculata of both normal adrenal glands and AT tissue were immunopositive for LH receptor; in ATs in a homogenous or heterogenous pattern. In normal adrenal glands, no immunolabeling for V1bR and V2 receptor was present, but in ATs, V2 receptor-immunopositive cells were detected. In conclusion, QPCR analysis did not reveal overexpression of LH, GIP, V1a, V1b, or V2 receptors in the ATs. However, the ectopic expression of GIP and V2 receptor proteins in tumorous zona fasciculata tissue may play a role in the pathogenesis of canine cortisol-secreting ATs.
    Introducing Capillary Electrophoresis with Laser-Induced Fluorescence (CE-LIF) as a Potential Analysis and Quantification Tool for Galactooligosaccharides Extracted from Complex Food Matrices
    Albrecht, S.A. ; Schols, H.A. ; Klarenbeek, B. ; Voragen, A.G.J. ; Gruppen, H. - \ 2010
    Journal of Agricultural and Food Chemistry 58 (2010)5. - ISSN 0021-8561 - p. 2787 - 2794.
    gastrointestinal symptoms - galacto-oligosaccharide - polysaccharides - bifidobacteria - metabolism - prebiotics - ingestion - products - sugars
    The analysis and quantification of (galacto)oligosaccharides from food matrices demands both a reproducible extraction method as well as a sensitive and accurate analytical method. Three typical matrices, namely, infant formula, fruit juice, and a maltodextrin-rich preparation, to which a commercial galactooligosaccharide mixture was added in a product concentration range from 1.25 to 30%, served as model substrates. Solid-phase extraction on graphitized carbon material upon enzymatic amyloglucosidase pretreatment enabled a good recovery and a selective purification of the different galactooligosaccharide structures from the exceeding amounts of particularly lactose and maltodextrins. With the implementation of capillary electrophoresis in combination with laser-induced fluorescence (CE-LIF) detection, a new possibility facilitating a sensitive qualitative and quantitative determination of the galactooligosaccharide contents in the different food matrices is outlined. Simultaneous monitoring and quantifying prebiotic oligosaccharides embedded in food matrices presents a promising and important step toward an efficient monitoring of individual oligosaccharides and is of interest for research areas dealing with small quantities of oligosaccharides embedded in complex matrices, e.g., body liquids.
    Far land near future
    Jagt, P.D. van der; Holst, F. van; Thomas, J. ; Brink, A. van den; Reyniers, J. ; Jongeneelen, O. ; Dijk, T. van; Timmermans, W. ; Daugaliene, V. ; Crecente, R. ; Ambar, M. ; Flachner, Z. - \ 2007
    Budapest : FARLAND - ISBN 9789630634236 - 148
    landinrichting - europese unie - ontwikkelingsplannen - ontwikkelingsprojecten - financiën - ontwikkelingsbeleid - internationale financiën - toekomst - land development - european union - development plans - development projects - finance - development policy - international finance - future
    Land development: expecting the unexpected. Future approaches to land development. Thos book is the result of an EU project. With Dutch contributions: Meerstad, Groningen (PPS) and Klarenbeek, Amsterdam (zorglandgoed)
    Onderzoek naar de ammoniakemissie van stallen XLVII : biothermische droogunit voor voorgedroogde leghennenmest met luchtbehandeling door een chemische wasser = Treatment of air from a biothermal drying unit for pre-dried of laying hens by a chemical air scrubber
    Hol, J.M.G. ; Klarenbeek, J.V. ; Groot Koerkamp, P.W.G. - \ 1999
    Wageningen : IMAG (Rapport / Instituut voor Milieu- en Agritechniek 99-11) - 23
    pluimveehouderij - mestverwerking - installatie - ammoniakemissie - luchtkwaliteit - hennen - pluimveemest - luchtreinigers - poultry farming - manure treatment - installation - ammonia emission - air quality - hens - poultry manure - air cleaners
    Door de DLO-meetploeg werd onderzoek verricht naar de ammoniakemissie van de mestverwerkingsinstallatie zoals die werd ontwikkeld en toegepast binnen het project 'Het Zuivere Ei'.
    Over de praktische werking van het biothermisch drogen van leghennenmest
    Klarenbeek, J.V. ; Kroodsma, W. ; Willemsen, W. ; Monteny, G.J. ; Cuperus, A.J. - \ 1999
    Wageningen : IMAG-DLO (Nota / Instituut voor Mechanisatie, Arbeid en Gebouwen P99-32) - 42
    pluimveemest - drogen - mestverwerking - warmtebehandeling - poultry manure - drying - manure treatment - heat treatment
    Oriënterend onderzoek naar geuremissie van rundveestallen
    Monteny, G.J. ; Scholtens, R. ; Klarenbeek, J.V. ; Bree, F. de - \ 1999
    Wageningen : IMAG-DLO (IMAG-rapport 99-17) - 26 p.
    The Orientation of the Phosphorescence Dipole Moment of Erythrosine within its Molecular Frame
    Lettinga, M.P. ; Klarenbeek, E.M. ; Zuilhof, H. ; Zandvoort, M.A.M.J. van - \ 1999
    Journal of Fluorescence 9 (1999). - ISSN 1053-0509 - p. 265 - 279.
    Emissievermindering van ammoniak uit varkensstallen door Bio-Aktief-Poeder
    Groot Koerkamp, P.W.G. ; Klarenbeek, J.V. - \ 1998
    Wageningen : IMAG (Nota / DLO Instituut voor Milieu- en Agritechniek (IMAG-DLO) P 98-74) - 10
    varkenshouderij - varkensstallen - ammoniakemissie - luchtkwaliteit - slachtdieren - pig farming - pig housing - ammonia emission - air quality - meat animals
    In dit onderzoek is het effect van het Bio-Aktief-Poeder op ammoniakemissie uit varkensstallen gemeten. Dit poeder wordt zowel aan mest als aan het voer van vleesvarkens toegevoegd.
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