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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Ontrafeling rozengenen nuttig voor veredeling op kwaliteit en resistentie : Roos en aardbei genetisch bijna hetzelfde : plantkunde : achtergrond
Smulders, M.J.M. ; Heuvelink, E. ; Kierkels, Tijs - \ 2018
Onder Glas 15 (2018)9. - p. 10 - 11.
Association between Preoperative Vitamin D Status and Short-Term Physical Performance after Total Hip Arthroplasty : A Prospective Study
Visser, Edith ; Roos, Nicole M. de; Oosting, Ellen ; Endenburg, Silvia C. ; Dronkers, Jaap J. - \ 2018
Annals of Nutrition & Metabolism 73 (2018)3. - ISSN 0250-6807 - p. 252 - 260.

Background: Insufficient serum vitamin D concentrations (50-75 nmol/L) are prevalent in 40-65% of patients who require total hip arthroplasty (THA). This could impair physical recovery after surgery. This study investigated the association between preoperative vitamin D status and physical performance after THA. Additionally, postoperative changes in vitamin D concentrations were measured. Methods: We included 87 patients scheduled for elective THA and aged ≥65 years. Three groups were recruited: patients classified as vitamin D deficient (< 50 nmol/L, n = 23), insufficient (50-75 nmol/L, n = 32), or sufficient (> 75 nmol/L, n = 32). Serum 25-hydroxyvitamin D3 (25[OH]D3) concentration and physical performance were measured perioperatively. Linear mixed models were used to examine differences between groups. Results: Change in physical performance over time was not affected by preoperative vitamin D status. In contrast, for physical activity, both vitamin D (p = 0.021) and time (p < 0.001) effect was seen: from 80.2 ± 25.8 to 58.1 ± 17.8 min/day in the deficient group, 143.7 ± 19.8 to 92.9 ± 11.5 min/day in the insufficient group, and 108.1 ± 20.9 to 62.3 ± 12.9 min/day in the sufficient group. The Chair Stand Test, Timed Up and Go test, and 10-Meter Walking Test also improved significantly over time, but independent of vitamin D status. An increase in 25(OH)D3 concentration 6 weeks postoperatively was correlated with improved hip function (Pearson's r = -0.471, p = 0.018). Overall, serum 25(OH)D3 declined with 32% one day after surgery (p < 0.001), to nearly return to baseline values 6 weeks later in all groups. Conclusion: Vitamin D status did not appear to affect physical recovery after THA. The drop in vitamin D after surgery deserves further investigation, but could possibly be explained by hemodilution.

Consumer acceptance of insects as food : Integrating psychological and socio-cultural perspectives
Tan, Hui Shan Grace ; House, Jonas - \ 2018
In: Edible Insects in Sustainable Food Systems / Halloran, Afton, Flore, Roberto, Vantomme, Paul, Roos, Nanna, Springer International Publishing - ISBN 9783319740102 - p. 375 - 386.

Although interest in the use of insects as food is growing in Europe and the US (the "West"), Western insect consumption remains far from widespread. Western resistance to entomophagy is often contrasted with the favourable position of edible insects in other regions, but little scholarship thus far has engaged with the question of why this difference exists. Drawing mainly on two qualitative studies, we compare the factors affecting insect consumption in contexts where it is both established (northeast Thailand) and where it is not (the Netherlands). We argue that the integration of different disciplinary perspectives elucidates the complexity of consumer acceptance, which goes beyond simple "willingness to eat" insects. Our research shows that the positioning of insects as an appreciated, regularly consumed food is the result of the intersection of a broad range of psychological, socio-cultural, practical and contextual factors. In addition to the commonly discussed psychological factors, regular insect consumption is determined by previous experience, culinary knowledge, wider cultural associations, established routines of food provisioning and eating, and the availability, price, form and taste of products. We suggest both demand-side factors (changing consumer perceptions) and supply-side factors (creating tasty, usable, distinctive and accessible products) are equally important to gaining consumer acceptance. We also emphasise that initial motivations to eat insects and repeated consumption are different things, and that there is a need to distinguish between the two in future scholarly and commercial efforts.

Insects: Key biological features
Eilenberg, Jørgen ; Loon, Joop J.A. van - \ 2018
In: Edible Insects in Sustainable Food Systems / Halloran, Afton, Flore, Roberto, Vantomme, Paul, Roos, Nanna, Springer International Publishing - ISBN 9783319740102 - p. 3 - 15.

In this chapter, we present a brief introduction to the biology of insects, the arthropod class Insecta. We describe diversity of insects and how their bodies are structured. We also provide information about key biological features, starting with the insect exoskeleton, its structure and function. Furthermore, the insect gut and its functions are explained as well as insect growth and development. We end by describing considerations and methods for insect collecting and sampling in the field to initiate and sustain insect rearing.

Defining a land boundary for sustainable livestock consumption
Zanten, Hannah H.E. van; Herrero, Mario ; Hal, Ollie van; Röös, Elin ; Muller, Adrian ; Garnett, Tara ; Gerber, Pierre J. ; Schader, Christian ; Boer, Imke J.M. De - \ 2018
Global Change Biology 24 (2018)9. - ISSN 1354-1013 - p. 4185 - 4194.
animal source food - greenhouse gas emissions - land boundary - land use - leftovers - livestock - recycling biomass - sustainable consumption - sustainable development goals

The need for more sustainable production and consumption of animal source food (ASF) is central to the achievement of the sustainable development goals: within this context, wise use of land is a core challenge and concern. A key question in feeding the future world is: how much ASF should we eat? We demonstrate that livestock raised under the circular economy concept could provide a significant, nonnegligible part (9–23 g/per capita) of our daily protein needs (~50–60 g/per capita). This livestock then would not consume human-edible biomass, such as grains, but mainly convert leftovers from arable land and grass resources into valuable food, implying that production of livestock feed is largely decoupled from arable land. The availability of these biomass streams for livestock then determines the boundaries for livestock production and consumption. Under this concept, the competition for land for feed or food would be minimized and compared to no ASF, including some ASF in the human diet could free up about one quarter of global arable land. Our results also demonstrate that restricted growth in consumption of ASF in Africa and Asia would be feasible under these boundary conditions, while reductions in the rest of the world would be necessary to meet land use sustainability criteria. Managing this expansion and contraction of future consumption of ASF is essential for achieving sustainable nutrition security.

Nieuwe roofwants beperkt vestiging Nesidiocoris tenuis in tomaat: ook positieve resultaten in roos en gerbera
Messelink, Gerben ; Leman, Ada - \ 2018
Protein intake in hospitalized older people with and without increased risk of malnutrition
Vasse, Emmelyne ; Beelen, J. ; Roos, N.M. de; Janssen, N. ; Groot, C.P.G.M. de - \ 2018
European Journal of Clinical Nutrition 72 (2018)6. - ISSN 0954-3007 - p. 917 - 919.
A protein intake of ≥1.2 grams per kg body weight (g/kg) is recommended for ill older adults. In a cross-sectional study, we investigated if this recommendation was met by 62 hospitalized adults of 65 years and older in a Dutch hospital. We compared protein intake between two subgroups based on the risk of malnutrition and the prescribed diet: a low risk group (n = 31) receiving a standard hospital diet and a medium/high risk group (n = 31) receiving a protein-enriched diet. A 24h-recall was performed to calculate protein intake per patient. Protein intake was on average 1.2 g/kg in the medium/high risk group and 0.9 g/kg in the low-risk group. Seventeen patients reached a protein intake of ≥1.2 g/kg. Fifteen patients had a protein intake below 0.8 g/kg. It seems sensible to consider providing a protein-enriched diet to all older hospitalized adults, regardless of their risk of malnutrition.
Flavor perception and the risk of malnutrition in patients with Parkinson’s disease
Roos, Dareia S. ; Oranje, Oscar J.M. ; Freriksen, Anneleen F.D. ; Berendse, Henk W. ; Boesveldt, Sanne - \ 2018
Journal of Neural Transmission 125 (2018)6. - ISSN 0300-9564 - p. 925 - 930.
BMI - Flavor perception - Malnutrition - Olfaction - Parkinson’s disease
Flavor perception involves both olfactory and gustatory function. In patients with Parkinson’s disease (PD), hyposmia is a frequent finding, as well as an increased risk of malnutrition. We performed a pilot study to investigate the relationship between flavor perception and risk of malnutrition in PD patients. 63 PD patients participated to perform an olfactory (Sniffin’ Sticks) and gustatory (Taste Strips) task, and a questionnaire to establish nutritional risk (MUST), which includes BMI measurements. The relationship between olfactory and gustatory function and BMI was analyzed using partial correlations, corrected for disease duration, and regression analysis. Patients displayed a high prevalence of hyposmia (68.3%), and a low prevalence (6.3%) of hypogeusia. A small, but significant correlation was found between olfactory function and BMI (r = 0.261, p = 0.038), and not for gustatory function and BMI (r = 0.137, p = 0.284). Hyposmia, and not hypogeusia, may contribute to weight loss in Parkinson’s disease, and hence increase the risk of malnutrition.
Genetic selection to enhance animalwelfare using meat inspection data from slaughter plants
Mathur, Pramod K. ; Vogelzang, Roos ; Mulder, Herman A. ; Knol, Egbert F. - \ 2018
Animals 8 (2018)2. - ISSN 2076-2615
Disease - Genetic selection - Meat inspection - Pigs - Remark - Welfare
Animal health and welfare are monitored during meat inspection in many slaughter plants around the world. Carcasses are examined by meat inspectors and remarks are made with respect to different diseases, injuries, and other abnormalities. This is a valuable data resource for disease prevention and enhancing animal welfare, but it is rarely used for this purpose. Records on carcass remarks on 140,375 finisher pigs were analyzed to investigate the possibility of genetic selection to reduce the risk of the most prevalent diseases and indicators of suboptimal animal welfare. As part of this, effects of some non-genetic factors such as differences between farms, sexes, and growth rates were also examined. The most frequent remarks were pneumonia (15.4%), joint disorders (9.8%), pleuritis (4.7%), pericarditis (2.3%), and liver lesions (2.2%). Joint disorders were more frequent in boars than in gilts. There were also significant differences between farms. Pedigree records were available for 142,324 pigs from 14 farms and were used for genetic analysis. Heritability estimates for pneumonia, pleuritis, pericarditis, liver lesions, and joint disorders were 0.10, 0.09, 0.14, 0.24, and 0.17 on the liability scale, respectively, suggesting the existence of substantial genetic variation. This was further confirmed though genome wide associations using deregressed breeding values as phenotypes. The genetic correlations between these remarks and finishing traits were small but mostly negative, suggesting the possibility of enhancing pig health and welfare simultaneously with genetic improvement in finishing traits. A selection index based on the breeding values for these traits and their economic values was developed. This index is used to enhance animal welfare in pig farms.
Protein-enriched familiar foods and drinks improve protein intake of hospitalized older patients: A randomized controlled trial
Beelen, J. ; Vasse, Emmelyne ; Janssen, N. ; Janse, A. ; Roos, N.M. de; Groot, C.P.G.M. de - \ 2018
Clinical Nutrition 37 (2018)4. - ISSN 0261-5614 - p. 1186 - 1192.
Background & aims Adequate protein intake is important in preventing and treating undernutrition. Hospitalized older patients are recommended to consume 1.2–1.5 g of protein per kg body weight per day (g/kg/d) but most of them fail to do so. Therefore, we investigated whether a range of newly developed protein-enriched familiar foods and drinks were effective in increasing protein intake of hospitalized older patients. Methods This randomized controlled trial involved 147 patients of ≥65 years (mean age: 78.5 ± 7.4 years). The control group (n = 80) received the standard energy and protein rich hospital menu. The intervention group (n = 67) received the same menu with various protein-enriched intervention products replacing regular products or added to the menu. Macronutrient intake on the fourth day of hospitalization, based on food ordering data, was compared between the two groups by using Independent T-tests and Mann Whitney U-tests. Results In the intervention group 30% of total protein was provided by the intervention products. The intervention group consumed 105.7 ± 34.2 g protein compared to 88.2 ± 24.4 g in the control group (p < 0.01); corresponding with 1.5 vs 1.2 g/kg/d (p < 0.01). More patients in the intervention group than in the control group reached a protein intake of 1.2 g/kg/d (79.1% vs 47.5%). Protein intake was significantly higher in the intervention group at breakfast, during the morning between breakfast and lunch, and at dinner. Conclusions This study shows that providing protein-enriched familiar foods and drinks, as replacement of regular products or as additions to the hospital menu, better enables hospitalized older patients to reach protein intake recommendations.
Ontwerp, constructie en karakterisatie van een multi-trofisch microbieel consortium als weerstand tegen R. solanacearum uit roos.
Bonants, Peter - \ 2017
The effects of a multispecies probiotic on migraine and markers of intestinal permeability-results of a randomized placebo-controlled study
Roos, N.M. De; Hemert, S. Van; Rovers, J.M.P. ; Smits, M.G. ; Witteman, B.J.M. - \ 2017
European Journal of Clinical Nutrition 71 (2017)12. - ISSN 0954-3007 - p. 1455 - 1462.
Background/Objectives:Migraine, associated with several gastrointestinal disorders, may result from increased intestinal permeability, allowing endotoxins to enter the bloodstream. We tested whether probiotics could reduce migraine through an effect on intestinal permeability and inflammation.Subjects/Methods:In total, 63 patients were randomly allocated to the probiotic (n=31) or the placebo group (n=32). Participants ingested a multispecies probiotic (5x10 9 colony-forming units) or placebo daily for 12 weeks. Migraine was assessed with the Migraine Disability Assessment Scale (MIDAS), the Headache Disability Inventory (HDI) and headache diaries. At baseline and 12 weeks, intestinal permeability was measured with the urinary lactulose/mannitol test and fecal and serum zonulin; inflammation was measured from interleukin (IL) -6, IL-10, tumor necrosis factor-α and C-reactive protein in serum.Results:The MIDAS migraine intensity score significantly decreased in both groups (P<0.001) and the HDI score significantly decreased in the probiotic group (P=0.032) and borderline in the placebo group (P=0.053). In the probiotics group, patients had a median of 6 migraine days in the first month, 4 in the second month (P=0.002) and 5 in the last month, which was not significantly different from the 5, 4, and 4 days in the placebo group. A ≤3/42day reduction in migraine days was seen in 12/31 patients in the probiotics group versus 7/29 in the placebo group (ns). Probiotic use did not significantly affect medication use, intestinal permeability or inflammation compared to placebo.Conclusions:In this study, we could not confirm significant benefit from a multispecies probiotic compared to a placebo on the outcome parameters of migraine and intestinal integrity.
Is grass-fed beef good or bad for the climate?
Garnett, Tara ; Godde, Cécile ; Muller, Adrian ; Röös, Elin ; Smith, Pete ; Boer, I.J.M. de; Ermgassen, Erasmus zu; Herrero, Mario ; Middelaar, C.E. van; Schader, Christian ; Zanten, H.H.E. van - \ 2017
When it comes to climate change, agriculture and the livestock industry often get a bad rap. Around 14.5% of human-related greehouse gas (GHG) emissions come from livestock. However, both consumers and policymakers have a much looser grasp on the impact of "gras-fed" beef. Is grass-fed beef good or bad for the climate?
Ruzie over biodiversiteit in zee
Tulp, Ingrid - \ 2017
Consuming insects : Are there health benefits?
Roos, N. ; Huis, A. van - \ 2017
Journal of Insects as Food and Feed 3 (2017)4. - ISSN 2352-4588 - p. 225 - 229.
How healthy are insects? This is a highly relevant question in view of the global interest in the potential of insects as a sustainable food source in food systems and diets. Edible insects, like other foods, can provide nutrients and dietary energy to meet the requirements of the human body as a part of a varied diet. They also have the potential to provide bioactive compounds that have health benefits beyond simple nutritional values, as is the case for other food groups such as fruits and vegetables. Various recent studies have indicated such bioactivity in different insect species. The enormous number of edible insect species may be a source of novel bioactive compounds with health benefits addressing global health challenges. However, any identified health benefits need to be confirmed in human studies or in standardised assays accepted in health research prior to making health claims.
Evaluatie Meststoffenwet 2016: syntheserapport
Grinsven, Hans van; Bleeker, Albert ; Sluis, Sietske van der; Schijndel, Marian van; Dam, Jan van; Tiktak, Aaldrik ; Gaalen, Frank van; Uyl, Roos den; Kruitwagen, Sonja ; Beck, Jeannette ; Velthof, Gerard ; Schoumans, Oscar ; Lauwere, Carolien de - \ 2017
Den Haag : Planbureau voor de Leefomgeving - 191
Grazed and confused? : Ruminating on cattle, grazing systems, methane, nitrous oxide, the soil carbon sequestration question - and what it all means for greenhouse gas emissions
Garnett, Tara ; Godde, Cécile ; Muller, A. ; Röös, Elin ; Smith, P. ; Boer, I.J.M. de; Ermgassen, Erasmus zu; Herrero, Mario ; Middelaar, C.E. van; Schader, Christian ; Zanten, H.H.E. van - \ 2017
Oxford : FCRN - 127 p.
In the context of planetary boundaries on the one hand and the need for human development (in its widest sense) on the other, what role – if any – do farmed animals play in a sustainable food system? If they do have a role, which systems and species are to be preferred, in which contexts, at what scale and at what level of overall production and consumption? How could the required changes happen?
Circulating Haptoglobin and Metabolic Syndrome in Renal Transplant Recipients
Minović, Isidor ; Eisenga, Michele F. ; Riphagen, Ineke J. ; Berg, Else van den; Kootstra-Ros, Jenny E. ; Frenay, Anne-Roos S. ; Goor, Harry van; Rimbach, Gerald ; Esatbeyoglu, Tuba ; Levy, Andy P. ; Ajm Gaillard, Carlo ; Geleijnse, Johanna M. ; Eggersdorfer, Manfred L. ; Navis, Gerjan J. ; Kema, Ido P. ; Bakker, Stephan L.J. - \ 2017
Scientific Reports 7 (2017). - ISSN 2045-2322 - 9 p.

Haptoglobin (Hp) is an acute phase protein that has recently been linked to components of the metabolic syndrome (MetS). We aimed to evaluate Hp as marker of MetS, and to assess its association with long-term outcome in renal transplant recipients (RTR). We measured plasma Hp in a prospective cohort of 699 stable RTR and 149 healthy controls. Median plasma Hp concentration in RTR was 1.4 [interquartile range (IQR), 1.0-1.8] g/L, which was higher compared to 1.1 [0.9-1.4] g/L in controls (P < 0.001). Hp was independently associated with the MetS (β = 0.10) (P = 0.005). During follow-up of 5.4 [4.8-6.1] years, 150 (21%) recipients died, of whom 60 (9%) due to cardiovascular causes, and 83 (12%) RTR developed graft failure. High (≥2.0 g/L) and low (≤0.9 g/L) plasma Hp were associated with increased risk of mortality (HR's 2.3 [1.3-4.1] and 1.9 [1.0-3.5], resp.), predominantly cardiovascular. The association of high Hp lost significance upon adjustment for inflammation markers (HR 1.5 [0.8-2.7]), while low Hp was independently associated with mortality (HR 2.2 [1.2-4.0]). Hp was not associated with graft failure (P = 0.49). In conclusion, plasma Hp is independently associated with MetS in RTR. Importantly, high and low Hp are associated with increased mortality risk, independent of MetS.

The optimal approach to nutrition and cystic fibrosis : Latest evidence and recommendations
Hollander, Francis M. ; Roos, Nicole M. de; Heijerman, Harry G.M. - \ 2017
Current Opinion in Pulmonary Medicine 23 (2017)6. - ISSN 1070-5287 - p. 556 - 561.
cystic fibrosis - cystic fibrosis transmembrane conductance regulator - evidence-based guidelines - nutrition - pulmonary function

Purpose of review Cystic fibrosis (CF) is a progressive genetic disease that affects multiple organ systems. Therapy is directed to maintain and optimize nutritional status and pulmonary function, as these are key factors in survival. In this review, the most recent findings regarding nutritional management associated with pulmonary function and outcome will be explored. Recent findings Evidence-based and expert-based guidelines emphasize the need for adequate nutritional intake to improve nutritional status. For infants and young children, the aim is to achieve the 50th percentile of weight and length for a healthy same-age population up to age 2 years. For older children and adolescents 2-18 years, the target is a BMI of at or above the 50th percentile for healthy children. For CF adults of at least 18 years, the target is a BMI of at or above 22kg/m2 for women and at or above 23kg/m2 for men. Recently, new drugs are developed with the aim to treat the malfunction of the cystic fibrosis transmembrane conductance regulator gene. This potentiator/corrector therapy improves lung function and nutritional status and decreases the number of infective exacerbations. As survival is improving and the CF population is aging, it is important to focus on micronutrient and macronutrient intake of CF patients in different age and disease stages. Summary Recent evidence-based nutritional guidelines and improved medical treatment support the nutritional monitoring and interventions in CF patients. Nutritional care should be personalized and provided by a specialized CF dietitian because patients' care needs may change dramatically during their disease progress.

Body Weight and Body Mass Index in Patients with End-Stage Cystic Fibrosis Stabilize After the Start of Enteral Tube Feeding
Hollander, Francis M. ; Roos, Nicole M. de; Belle-Van Meerkerk, Gerdien ; Teding van Berkhout, Ferdinand ; Heijerman, Harry G.M. ; Graaf, Ed A. van de - \ 2017
Journal of the Academy of Nutrition and Dietetics 117 (2017)11. - ISSN 2212-2672 - p. 1808 - 1815.
Body mass index - Cystic fibrosis-related diabetes - End-stage lung disease - Enteral tube feeding - Pulmonary function
Background: Enteral tube feeding (ETF) is widely used in patients with cystic fibrosis (CF) and end-stage lung disease, but previous studies have been limited to investigating whether ETF improves outcomes in patients with moderately or mildly impaired pulmonary function. Objective: This study investigated body weight, body mass index (BMI; calculated as kg/m2), pulmonary function, and the presence of CF-related diabetes before and after the start of ETF. Design: This was a retrospective observational study. Participants/setting: Data from 26 adult patients in an outpatient setting who had end-stage CF (19 women) and had been using ETF for at least 6 months between 2000 and 2014 were analyzed. Main outcome measures: Body weight, BMI, pulmonary function (forced expiratory volume in 1 second as percent of predicted) and incidence of CF-related diabetes from 6 months before to 6 months after starting ETF. Statistical analyses performed: Time effects were tested with one-way analysis of variance for data that were normally distributed and the Friedman test for non-parametric data. Correlations were tested with Pearson's r or Spearman's ρ, depending on the distribution of the data. Results: Mean body weight increased by 3.5 kg (95% CI 2.2 to 4.8 kg) after patients started ETF. In women, mean BMI decreased by 0.7 in the 6 months before the start of ETF (P<0.05) and increased by 1.4 in the 6 months thereafter (P<0.05). In men, BMI changes were similar (-0.8 and +1.1), but not statistically significant. Forced expiratory volume in 1 second as percent of predicted significantly decreased in time from a median of 28% to 26% at the start of ETF to 25% after 6 months (P=0.0013), with similar trends in women and men. There was no correlation between changes in weight and lung function. CF-related diabetes was already present in 12 patients and developed in 1 more patient after the start of ETF. Conclusions: ETF improved body weight and BMI but not pulmonary function in 26 patients with end-stage CF. Clinical outcomes were similar in women and men, but the sample size of men was too small to determine statistical significance.
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