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.

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    Advieskaart saprotrofe schimmels
    Hofland-Zijlstra, J.D. ; Boon, H. ; Berg, A. van den; Vermunt, A. - \ 2016
    LTO Glaskracht Nederland - 4
    saprofyten - schimmels - gewasbescherming - plantgezondheid - saprophytes - fungi - plant protection - plant health
    Door toenemende druk op de toepassing van veen vervangende producten in het substraat en afnemend
    gebruik van breed werkende fungiciden worden meer risico’s verwacht met overmatig groeiende saprotrofe
    schimmels. Deze schimmels zijn niet direct schadelijk voor het gewas, maar wel voor de productie. In deze
    advieskaart staan de herkenning van de schimmels, het voorkomen van besmetting en de bijbehorende
    maatregelen centraal.
    Exploring student teachers' resistance to teacher education pedagogies
    Bronkhorst, L.H. ; Koster, B. ; Meijer, P.C. ; Woldman, N. ; Vermunt, J.D. - \ 2014
    Teaching and Teacher Education 40 (2014). - ISSN 0742-051X - p. 73 - 82.
    deliberate practice - reflection - portfolio
    Student teachers' resistance to teacher education is often understood as a lack of quality of the student teacher and/or the internship, and is expected to impede learning. In this study we suggest that resistance is interactive in nature, and can potentially have constructive outcomes. We engaged in a crosscase analysis of the resistance of two student teachers in a year-long teacher education program. Our results draw attention to diverse ways in which student teachers can engage in resistance, and to ways in which educators can support students in exploiting their resistance to benefit their learning. (C) 2014 Elsevier Ltd. All rights reserved.
    Preventie diabetes mellitus type 2 in de huisartsenpraktijk
    Vermunt, A.M.W. ; Milder, I.E.J. ; Vries, J.H.M. de; Schelfhout, J.D.M. ; Baan, C.A. ; Oers, J.A.M. van; Westert, G.P. - \ 2012
    Nederlands Tijdschrift voor Geneeskunde 156 (2012). - ISSN 0028-2162
    A lifestyle intervention to reduce Type 2 diabetes risk in Dutch primary care: 2.5-year results of a randomized controlled trial
    Vermunt, P.W. ; Milder, I.E.J. ; Wielaard, F. ; Vries, J.H.M. de; Baan, C.A. ; Oers, J.A.M. van; Westert, G.P. - \ 2012
    Diabetic medicine 29 (2012)8. - ISSN 0742-3071 - p. E223 - E231.
    impaired glucose-tolerance - health-care - follow-up - weight-loss - real-world - prevention - program - implementation - questionnaire - validity
    Aims To determine the effectiveness of a 2.5-year lifestyle intervention for Type 2 diabetes prevention in Dutch general practice compared with usual care. Methods A randomized controlled trial of 925 individuals at high risk for Type 2 diabetes (FINDRISC-score = 13) in 14 general practices in the Netherlands. Intervention consisted of lifestyle counselling from the nurse practitioner and the general practitioner. Usual care consisted of oral and written information at the start of the study. Study groups were compared over 2.5 years regarding changes in clinical and lifestyle measures. Results Both groups showed modest changes in body weight, glucose concentrations, physical activity and dietary intake [weight: intervention group, -0.8 (5.1) kg, usual care group, -0.4 (4.7) kg, (P = 0.69); fasting plasma glucose: intervention group, -0.17 (0.4) mmol/l, usual care group, -0.10 (0.5) mmol/l, (P = 0.10)]. Differences between groups were significant only for total physical activity and fibre intake. In the intervention group, self-efficacy was significantly higher in individuals successful at losing weight compared with unsuccessful individuals. No significant differences in participant weight loss were found between general practitioners and nurse practitioners with different levels of motivation or self-efficacy. Conclusions Diabetes risk factors could significantly be reduced by lifestyle counselling in Dutch primary care. However, intervention effects above the effects attributable to usual care were modest. Higher participant self-efficacy seemed to facilitate weight loss. Lack of motivation or self-efficacy of professionals did not negatively influence participant guidance.
    Lifestyle counseling for type 2 diabetes risk reduction in Dutch primary care: results of the APHRODITE study after 0.5 and 1.5 years
    Vermunt, P.W. ; Milder, I.E.J. ; Wielaard, F. ; Vries, J.H.M. de; Oers, H. van; Westert, G.P. - \ 2011
    Diabetes Care 34 (2011)9. - ISSN 0149-5992 - p. 1919 - 1925.
    prevention program - health-care - follow-up - intervention - community - implementation - questionnaire - metaanalysis - validity - outcomes
    OBJECTIVE To study the overall effect of the Active Prevention in High-Risk Individuals of Diabetes Type 2 in and Around Eindhoven (APHRODITE) lifestyle intervention on type 2 diabetes risk reduction in Dutch primary care after 0.5 and 1.5 years and to evaluate the variability between general practices. RESEARCH DESIGN AND METHODS Individuals at high risk for type 2 diabetes (Finnish Diabetes Risk Score =13) were randomly assigned into an intervention group (n = 479) or a usual-care group (n = 446). Comparisons were made between study groups and between general practices regarding changes in clinical and lifestyle measures over 1.5 years. Participant, general practitioner, and nurse practitioner characteristics were compared between individuals who lost weight or maintained a stable weight and individuals who gained weight. RESULTS Both groups showed modest changes in glucose values, weight measures, physical activity, energy intake, and fiber intake. Differences between groups were significant only for total physical activity, saturated fat intake, and fiber intake. Differences between general practices were significant for BMI and 2-h glucose but not for energy intake and physical activity. In the intervention group, the nurse practitioners’ mean years of work experience was significantly longer in individuals who were successful at losing weight or maintaining a stable weight compared with unsuccessful individuals. Furthermore, successful individuals more often had a partner. CONCLUSIONS Risk factors for type 2 diabetes could be significantly reduced by lifestyle counseling in Dutch primary care. The small differences in changes over time between the two study groups suggest that additional intervention effects are modest. In particular, the level of experience of the nurse practitioner and the availability of partner support seem to facilitate intervention success. With a global prevalence of 285 million diagnosed individuals (1), type 2 diabetes poses a major public health concern. Moreover, the prevalence of the disease is estimated to rise to 438 million in 20 years (1). Several studies in experimental settings have shown that type 2 diabetes incidence and risk can be significantly reduced by lifestyle intervention in high-risk individuals (2). Furthermore, the beneficial effect of behavioral change can be sustained long after counseling is stopped (3,4). In daily-life settings, less resources for program implementation and delivery may be available than in experimental settings, which may influence results (5,6). Individual dietary counseling or extensive exercise programs, for example, may be too expensive. Nevertheless, significant reductions in type 2 diabetes risk were found in recent studies in the community and in primary and occupational health care (7–12). However, in most of these studies in daily-life settings, usual-care comparison groups were lacking, and therefore, the additional effectiveness of the interventions could not be determined (5). Furthermore, differences between health care institutions were not reported. The Active Prevention in High-Risk Individuals of Diabetes Type 2 in and Around Eindhoven (APHRODITE) study investigates the effectiveness and feasibility of type 2 diabetes prevention by lifestyle intervention in Dutch general practice. In this article, we report the overall effect of the APHRODITE lifestyle intervention on type 2 diabetes risk reduction in Dutch primary care after 0.5 and 1.5 years. Furthermore, we evaluate differences in risk-factor reduction between practices and investigate the characteristics of participants and health care providers that may facilitate success
    Detectie en beheersing van bacterierot veroorzaakt door Pseudomonas cattleyae in Phalaenopsis
    Ludeking, D.J.W. ; Hamelink, R. ; Kromwijk, J.A.M. ; Schenk, M.F. ; Vermunt, A. ; Woets, F. - \ 2011
    Bleiswijk : Wageningen UR Glastuinbouw (Rapporten GTB 1096) - 31
    phalaenopsis - bacterieziekten - infectie - pseudomonas - bladvlekkenziekte - black spot - moleculaire technieken - relatieve vochtigheid - waterzuivering - invloeden - phalaenopsis - bacterial diseases - infection - pseudomonas - leaf spotting - black spot - molecular techniques - relative humidity - water treatment - influences
    Phalaenopsis growers suffer from mayor losses up to 20% due to bacterial spot. This bacterial infection in caused by the Acidovorax avenae subsp. cattleyae. In practice this bacterial disease is also known as Pseudomonas. This bacterium is causing black leaf spots with a yellow border. Pseudomonas cattleyae is very contagious and is promoted by high temperatures en moist conditions. In this project Groen Agro Control laboratory (Delfgauw) has developed a molecular analysis method to detect Pseudomonas cattleyae in different matrices. The influence of the relative humidity on the development of Pseudomonas cattleyae is investigated during this research. The results show that a relative humidity of 90% strongly promotes infection of the bacteria. A relative humidity of 75% shows no extra dispersion of Pseudomonas cattleyae compared to a greenhouse compartment with a continuous relative humidity of 60%. This knowledge offers the opportunity to safe energy in the cultivation of Phalaenopsis. During this research the effects of water treatments on the dispersion of Pseudomonas cattleyae have been investigated. The results show that a treatment with hydrogen peroxide (20 ppm) offers the best reduction of dispersion. This treatment turns out to be better than the control and all other treatments. This research has led to new insights about the dispersal and optimal growing conditions of this bacteria, but leads to new questions. Questions, about other different dosages and the effects of other water treatments, but also about the optimal level to promote plant growth and reduce bacterial infections, have to be investigated in new research.
    Kasproef detectie en beheersing van Pseudomonas cattleyae in Phalaenopsis1219
    Ludeking, D.J.W. ; Kromwijk, J.A.M. ; Woets, F. ; Vermunt, A. ; Schenk, M.F. - \ 2011
    Kasproef detectie en beheersing van Pseudomonas cattleyae in Phalaenopsis
    Ludeking, D.J.W. ; Kromwijk, J.A.M. ; Woets, F. ; Vermunt, A. ; Schenk, M.F. - \ 2010
    phalaenopsis - acidovorax avenae - detectie - gewasbescherming - aantasting - bladeren - phalaenopsis - acidovorax avenae - detection - plant protection - infestation - leaves
    Informatieposter over een kasproef detectie en beheersing van Pseudomonas cattleyae in Phalaenopsis
    The use of attenuated isolates of Pepino mosaic virus for cross-protection
    Schenk, M.F. ; Hamelink, R. ; Vlugt, R.A.A. van der; Vermunt, A.M.W. ; Kaarsemaker, R.C. ; Stijger, C.C.M.M. - \ 2010
    European Journal of Plant Pathology 127 (2010)2. - ISSN 0929-1873 - p. 249 - 261.
    genomic rna - tomato - sequence - population - resistance - potyvirus - disease - strain - range - spain
    Pepino mosaic virus (PepMV) has recently emerged as a highly infectious viral pathogen in tomato crops. Greenhouse trials were conducted under conditions similar to commercial tomato production. These trials examined whether tomato plants can be protected against PepMV by a preceding infection with an attenuated isolate of this virus. Two potential attenuated isolates that displayed mild leaf symptoms were selected from field isolates. Two PepMV isolates that displayed severe leaf symptoms were also selected from field isolates to challenge the attenuated isolates. The isolates with aggressive symptoms were found to reduce bulk yields by 8 and 24% in single infections, respectively. Yield losses were reduced to a 0–3% loss in plants that were treated with either one of the attenuated isolates, while no effects were observed on the quality of the fruits. After the challenge infection, virus accumulation levels and symptom severity of the isolates with aggressive symptoms were also reduced by cross-protection. Infection with the attenuated isolates alone did neither affect bulk yield, nor quality of the harvested tomato fruits.
    Pepinomozaiekvirus: Verspreiding en cross-protectie
    Hamelink, R. ; Stijger, I. ; Vermunt, A. ; Vlugt, R.A.A. van der; Schenk, M.F. - \ 2010
    plantenvirussen - pepinomozaïekvirus - tomaten - hygiëne - gewasbescherming - plant viruses - pepino mosaic virus - tomatoes - hygiene - plant protection
    Pepinomozaïekvirus (PepMV) is vanaf 1999 in Nederland aanwezig en zorgt nu al een decennium lang voor problemen in de tomatenteelt. Zolang er geen immune cultivars beschikbaar zijn, zijn hygiënemaatregelen en cross-protectie de enige strategieën die mogelijk een oplossing kunnen bieden. In de loop der jaren zijn diverse onderzoeken uitgevoerd aan PepMV. Deze poster geeft meer informatie over PepMV en maatregelen hier tegen. Er wordt geconcludeerd dat op dit moment de toepassing van strikte hygiënemaatregelen de enige optie is waarvan vaststaat dat het helpt PepMV in te perken.
    Kasproef bestrijding overmatige wortelgroei in groentengewassen
    Hamelink, R. ; Wubben, J.P. ; Marrewijk, I. ; Vermunt, A. ; Schenk, M.F. - \ 2010
    bestrijdingsmethoden - beworteling - hyperactiviteit - groenteteelt - control methods - rooting - hyperactivity - vegetable growing
    Poster ten behoeve van de gewasbeschermingsdag van 18 maart 2010. Hierin wordt de bestrijding van overmatige wortelgroei in groentengewassen besproken.
    Kasproef detectie en beheersing van Pseudomonas cattleyae in Phalaenopsis
    Kromwijk, J.A.M. ; Ludeking, D.J.W. ; Woets, F. ; Vermunt, A. ; Schenk, M.F. - \ 2010
    gewasbescherming - bacteriën - infecties - verspreide infecties - preventie - pseudomonas - phalaenopsis - glastuinbouw - plant protection - bacteria - infections - disseminated infections - prevention - pseudomonas - phalaenopsis - greenhouse horticulture
    Samenvatting van een kasproef getiteld "detectie en beheersing van Pseudomonas cattleyae in Phalaenopsis"
    Bescherming en beheersing van pepinomozaïekvirus in de tomatenteelt: kasproef cross-protectie
    Schenk, M.F. ; Hamelink, R. ; Vlugt, R.A.A. van der; Vermunt, A.E.M. ; Meijer, R.J.M. - \ 2010
    Bleiswijk : Wageningen UR Glastuinbouw (Rapport / Wageningen UR Glastuinbouw 322) - 22
    solanum lycopersicum - tomaten - plantenvirussen - pepinomozaïekvirus - gewasbescherming - ziekteresistentie - verdedigingsmechanismen - solanum lycopersicum - tomatoes - plant viruses - pepino mosaic virus - plant protection - disease resistance - defence mechanisms
    Pepinomozaïkvirus is een mechanisch overdraagbaar virus. Het tegengaan van besmettingen met dit virus blijkt in de praktijk bijzonder lastig. Naast het aanhouden van strikte hygiëne vormt de toepassing van cross-protectie een alternatieve strategie. Daarbij veronderstelt met dan besmetting met zwakke virusisolaten (zwakke stammen) de gevolgen van een besmetting met agressieve isolaten onderdrukt. In 2005 en 2006 is in kasproeven aangetoond dat cross-protectie met de isolaten V1 of 1066 werkt tegen isolaten van de Europese (EU) stam van pepinomozaïkvirus. Kleinschalige preoven uit 2008 suggereerden echt dat de zwakke isolaten V1 en 1066 niet in staat zijn om beschrming met nieuwe varianten die tot de Chili-2 stam (CH-2) behoorden, waren doorbraakverschijnselen zichtbaar. Een zwak isolaat da behoorde tot deze Ch-2 stam bood wel bescherming onder deze omstandigheden, maar was minder zwak in zijn symptomen dan V1 en 1066. In de proeven uit 2008 is vanwege de looptijd van de proef alleen gekeken naar het optreden van bladsymptomen.
    Haalbaarheid hygiënestrategie bij tomatenbedrijven om vrij te blijven van pepinomozaïekvirus
    Vermunt, A. ; Kaarsemaker, R.C. ; Schenk, M.F. ; Stijger, I. - \ 2009
    Delfgauw : Groen Agro Control - 16
    glastuinbouw - tomaten - gewasbescherming - plantenvirussen - pepinomozaïekvirus - greenhouse horticulture - tomatoes - plant protection - plant viruses - pepino mosaic virus
    Bij een zevental tomatentelers die absoluut vrij wilden blijven van een besmetting met het pepinomozaïekvirus is de teelt gevolgd en begeleid. Deze telers namen tevens deel aan een praktijknetwerk waarin ervaringen werden uitgewisseld.
    Bescherming en beheersing van PepMV in de tomatenteelt : onderdeel Cross-protectie
    Schenk, M.F. ; Stijger, I. ; Hamelink, R. ; Vlugt, R.A.A. van der; Vermunt, A. ; Kaarsemaker, R.C. ; Meijer, R.J.M. - \ 2009
    Bleiswijk : Wageningen UR, Glastuinbouw (Rapport / Plant Research International 275) - 32
    solanum lycopersicum - tomaten - Pepinomozaïekvirus - gewasbescherming - plantenziektebestrijding - plantenvirussen - nederland - glastuinbouw - solanum lycopersicum - tomatoes - pepino mosaic virus - plant protection - plant disease control - plant viruses - netherlands - greenhouse horticulture
    Het Pepinomozaïekvirus (PepMV) is een mechanisch overdraagbaar virus. Het tegengaan van besmetting is in de praktijk zeer lastig. Naast het aanhouden van strikte hygiëne is de toepassing van cross-protectie een alternatieve strategie. Daarbij veronderstelt men dat besmetting met milde virusvarianten (zwakke stammen) de gevolgen van een besmetting met agressieve isolaten ondedrukt. Eerder is aangetoond dat cross-protectie met V1 of 1066 tegen de Europese tomatenstam van PepMV werkt. De doelstelling van dit onderzoek was om te bepalen of zwakke stammen in staat zijn om te beschermen tegen nieuwe agressievere isolaten van PepMV.
    Beschermende maatregelen tegen PepMV in de tomatenteelt : verslag van de onderdelen selectie en karakterisering zwakke en kasproef (cross-protectie)
    Stijger, Ineke ; Hamelink, Roel ; Vlugt, René van der; Kaarsemaker, Ruud ; Vermunt, Adriaan - \ 2008
    Bleiswijk : Wageningen UR Glastuinbouw (Nota / Wageningen UR Glastuinbouw 548) - 60
    Consultancy-onderzoek naar de veroorzaker van een onbekende verwelking in komkommer
    Vermunt, A. ; Chettou, M. ; Groen, B. ; Paternotte, S.J. ; Hamelink, R. - \ 2008
    Delfgauw, Bleiswijk : Groen Agro Control, WUR Glastuinbouw - 11
    komkommers - cucumis sativus - afwijkingen, planten - plantenziekten - landbouwkundig onderzoek - vruchtgroenten - cucumbers - cucumis sativus - plant disorders - plant diseases - agricultural research - fruit vegetables
    Op een aantal bedrijven trad in 2008 tijdens de teelt van komkommer pleksgewijs verwelking op waarvan de oorzaak onbekend was. Hierbij werd de stengelvoet soms wat dikker en de punt van de hoofdwortel was bruinverkleurd en glazig. De plantuitval bleef bij een paar telers beperkt tot enkele planten, maar kon ook in ernstige gevallen oplopen tot ca 20% van de planten. Omdat de uitval pleksgewijs optrad, was een chemische verontreiniging, fysiologische of klimatologische oorzaak onwaarschijnlijk. De verwachting was dat het om een microbiologische oorzaak gaat. Uit het hier uitgevoerde onderzoek bleek dat de ziekte niet veroorzaakt wordt door een bekende komkommerziekte. Wel is er geconstateerd dat in de vaatbundels van aangetaste planten hoge concentraties bacteriën aanwezig waren. Deze bacteriën zorgen ervoor dat de vaatbundels verstopt raken, waardoor geen transport van voedingsstoffen meer plaats kan vinden en de plant uiteindelijk verwelkt. Om de ziekte weer op te roepen in komkommerplanten, zijn bacteriën geïsoleerd uit aangetaste planten. Deze bacteriën zijn vervolgens opgekweekt en hiermee zijn jonge komkommerplantjes besmet. Er was echter geen effect waar te nemen gedurende een 6-weken durende teeltproef. De ziekte kon dus, in dit onderzoek, niet opgeroepen worden om zodoende de primaire veroorzaker vast te stellen. Uitgebreider onderzoek is gewenst om vast te stellen wat de primaire oorzaak is, zodat gerichte maatregelen getroffen kunnen worden om de verwelking te voorkomen. Anders bestaat er een risico, dat onder gelijke teeltcondities, er in 2009 en 2010 meer bedrijven getroffen zullen worden door deze verwelking.
    Reduction of pest control impact of horticulture on ground and surface water through a system of Constant crop monitoring, Early diagnosis, Prevention and Early treatment (CEPE) - An advisory system for effective and sustainable control of root diseases in greenhouse crops based on monitoring of fungal pathogens and chemicals - Laymans Report
    Hofland-Zijlstra, J.D. ; Meijer, R.J.M. ; Paternotte, S.J. ; Leeuwen, G.J.L. van; Wubben, J.P. ; Vermunt, A.M.W. ; Erp, P. van; Ven, E. van der; Steenbakkers, M. - \ 2008
    B-1049 Brussels, Belgium : European Commission DG ENV. E.4-LIFE
    CEPE-project: meer kennis, betere bestrijdingsstrategie
    Vermunt, A. ; Paternotte, S.J. - \ 2008
    Vruchtgroenten Koerier 2008 (2008)mei. - p. 1 - 3.
    Moderate alcohol consumption and lipoprotein-associated phospholipase A2 activity
    Beulens, J.W.J. ; Berg, R. van den; Kok, F.J. ; Helander, A. ; Vermunt, S.H.F. ; Hendriks, H.F.J. - \ 2008
    Nutrition, Metabolism & Cardiovascular Diseases 18 (2008)8. - ISSN 0939-4753 - p. 539 - 544.
    gamma-glutamyl-transferase - coronary-heart-disease - c-reactive protein - middle-aged men - postmenopausal women - risk-factors - randomized intervention - cardiovascular-disease - insulin sensitivity - serum paraoxonase
    Background and aims To investigate the effect of moderate alcohol consumption on lipoprotein-associated phospholipase A2 activity, markers of inflammation and oxidative stress and whether these effects are modified by BMI. Methods and results Eleven lean (BMI: 18.5¿25 kg/m2) and 9 overweight (BMI > 27 kg/m2) men participated in a randomized controlled crossover trial. After consuming 3 cans of beer (40 g ethanol) or alcohol-free beer daily during 3 weeks, fasting blood samples were taken. HDL cholesterol increased by 18.2% (p <0.001) after beer compared to alcohol-free beer, while LDL cholesterol decreased by 7.8% (p = 0.008). Lipoprotein-associated phospholipase A2 activity was not different (p = 0.23) between beer (47.5 ± 0.8) and alcohol-free beer (48.9 ± 0.8). High-sensitive C-reactive protein was unaffected, but urinary isoprostanes tended to increase (p = 0.09) after beer (114.0 ± 6.9) compared to alcohol-free beer (96.9 ± 6.5). An interaction between BMI and treatment (p <0.05) on liver enzymes was observed, indicating an increase of liver enzymes after moderate alcohol consumption in overweight men only. Conclusion Despite profound effects on HDL and LDL cholesterol, moderate alcohol consumption did not affect lipoprotein-associated phospholipase A2 activity. Liver enzymes increased after alcohol consumption in overweight men only, suggesting a less favorable response to moderate alcohol consumption in overweight people.
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