389 research outputs found
Videos for: Greening the dike revetment with historic sod transplantation technique in a Living Lab
No full text<p>Videos belonging to the publication: <br>Van den Hoven et al., Greening the dike revetment with historic sod transplantation technique in a Living Lab. <br>In: Journal of Flood Risk Management. <br>DOI:10.1111/jfr3.12968</p>
<p>Video 1 Sods transplantation<br>Video 2 Impression of sod pulling method<br>Video 3 Impression of wave impact simulation<br>Video 4 Impression of overflow simulation</p>
RBC transfusion leads to an improvement of physical fatigue in women with acute postpartum anemia: the WOMB study (NCT00335023)
No full textAbstract 64Babette W. Prick, A.J. Gerard Jansen, Eric A.P. Steegers, Wim C.J. Hop, Marie-Louise Essink-Bot, Carin A. Uyl-de Groot, Dimitri N.M. Papatsonis, Bettina M.C. Akerboom, Godfried C.H. Metz, Henk A. Bremer, Aren J. van Loon, Rob H. Stigter, Joris A.M. van der Post, Marcel van Alphen, Martina Porath, Robbert J.P. Rijnders, Marc E.A. Spaanderman, Daniela H. Schippers, Kitty W.M. Bloemenkamp, Kim E. Boers, Hubertina C.J. Scheepers, Frans J.M.E. Roumen, Anneke Kwee, Nico W.E. Schuitemaker, Ben Willem J. Mol, Dick J. van Rhenen, Johannes J. Duveko
Data for: Greening the dike revetment with historic sod transplantation technique in a Living Lab.
No full textData from an in situ experiment on a dike in Living Lab Hedwige Prosperpolder. In the experiment we applied a historic sod transplantation technique. We tested the erosion resistance of the adapted vegetated dike revetment after one growth season.
Dataset contains measurements in sods plot S1, S2, S3, S4 and in reference plots R1-R4. In addition, two section were only milled (K1 and F). These sections are not described in the publication, however some data is available and thus included in this dataset.
This dataset contains files from the following research steps:
1. Visual observation (vegetation)
2. Soil moisture content & Soil penetration resistance
3. Root indication (doorwortelling)
4. Sod pulling method (grastrek proef)
5. Wave impact test (golfklap proef) & Overflow test (overloop proef)
The data is described in the following publication:
Greening the dike revetment with historic sod transplantation technique in a Living Lab. Kim van den Hoven; Carla J. Grashof-Bokdam; Pieter A. Slim; Ludolph Wentholt; Patrik Peeters; Davy Depreiter; André R. Koelewijn; Marte M. Stoorvogel; Mario van den Berg; Carolien Kroeze; Jantsje M. van Loon-Steensm
Performance of specialist and generalist herbivores feeding on cabbage cultivars is not explained by glucosinolate profiles
No full textPlants display a wide range of chemical defences that may differ in effectiveness against generalist and specialist insect herbivores. Host plant-specific secondary chemicals such as glucosinolates (GS) in Brassicaceae typically reduce the performance of generalist herbivores, whereas specialists have adaptations to detoxify these compounds. The concentration of glucosinolates may also alter upon herbivory, allowing the plant to tailor its response to specifically affect the performance of the attacking herbivore. We studied the performance of three Lepidoptera species, two specialists [Pieris rapae L. (Pieridae), Plutella xylostella L. (Yponomeutidae)] and one generalist [Mamestra brassicae L. (Noctuidae)], when feeding on eight cultivars of Brassica oleracea L. and a native congener (Brassica nigra L.) and related this to the GS content. We tested the hypotheses (i) that a generalist herbivore is more affected by high GS concentrations, and (ii) that generalist feeding has a stronger effect on GS levels. Although performance of the three herbivores was different on the B. oleracea cultivars, M. brassicae and P. xylostella had a similar ranking order of performance on the eight cultivars. In most of the cultivars, the concentration of indole GS was significantly higher after feeding by P. rapae or M. brassicae than after P. xylostella feeding. As a consequence, the total concentration of GS in the cultivars showed a different ranking order for each herbivore species. The generalist M. brassicae performed equally well as the specialist P. xylostella on cultivars with high concentrations of GS. Our findings suggest that secondary metabolites other than GSs or differences in nutrient levels affect performance of the species studied.
Management of gestational hypertension and mild pre-eclampsia at term
No full textZwangerschapshypertensie en preëclampsie compliceren 6-8% van alle zwangerschappen en vormen in Nederland de belangrijkste oorzaak van maternale morbiditeit en mortaliteit. Vaak is het ziektebeeld mild en treedt op in de aterme periode. Soms ontstaan ernstige complicaties, zoals eclampsie, abruptio placentae of het HELLP-syndroom. Wereldwijd was er tot nu toe geen overeenstemming over het beste beleid bij deze aandoeningen. Inleiding van de baring zou enerzijds maternale complicaties kunnen reduceren, maar anderzijds de kans op een sectio caesarea kunnen verhogen.
Het eerste deel van dit proefschrift beschrijft een multicentrisch gerandomiseerde klinische studie (HYPITAT trial (HYpertension and Pre-eclampsia Intervention Trial At Term)), uitgevoerd binnen het Verloskundige Consortium (www.studies-obsgyn.nl/hypitat). Wij onderzochten wat beter is voor vrouwen met een milde zwangerschapsgerelateerde aterme hypertensie: inleiden of afwachten, met het oog op klinische effectiviteit, maternale kwaliteit van leven en kosten. Deze studie werd uitgevoerd in 38 Nederlandse ziekenhuizen. In totaal werden 756 vrouwen gerandomiseerd voor inleiden (n=377) of afwachten (n=379). De resultaten wijzen uit dat inleiden de kans op maternale complicaties verkleint (31% versus 44%; RR 0.71; p<0.001), inleiden een tendens laat zien van minder sectio caesarea (14% versus 19%; RR0.75; p=0.085) en inleiden gemiddeld 831 euro per patiënt goedkoper is dan afwachten. De neonatale uitkomst en de maternale kwaliteit van leven is gelijk tussen beide strategieën. Daarom adviseren wij een inleiding van de baring bij vrouwen met een zwangerschapshypertensie of milde preëclampsie na 37 weken zwangerschap.
Het tweede gedeelte van dit proefschrift beschrijft welke factoren een slechte maternale uitkomst bij vrouwen met een aterme zwangerschapshypertensie of milde preëclampsie kunnen voorspellen. Voor deze studies hebben wij gebruik van de HYPITAT database.
Overland flow: interfacing models with measurements
No full textIndex words: overland flow, catchment scale, system identification, ensemble simulations.This study presents new techniques to identify scale-dependent overland flow models and use these for ensemble-based predictions. The techniques are developed on the basis of overland flow, rain, discharge, soil, vegetation and terrain observations that were collected over a three year period in two tropical catchments. The merits of the identification technique are its robustness with regard to unknown errors, the ability to adjust model resolution in response to data availability, and to interpret the entities of the identified model structures physically. Compared to a static regression model and a dynamic distributed model the predictive performance of the scale-dependent overland flow models is good, especially when using model ensembles. Further analysis of the scale-dependent models shows that rainfall largely determines overland flow when modelled at coarse resolutions, whereas soil moisture drives overland flow when defined at fine resolutions. Interestingly, the number of model parameters remains constant over the different resolutions. The use of the scale-dependent models for predictive purposes is demonstrated by applying Tikhonov regularization for recursive state as well as parameter estimation
Tri-trophic effects of inter- and intra-population variation in defence chemistry of wild cabbage (Brassica oleracea)
No full textThe effect of direct chemical defences in plants on the performance of insect herbivores and their natural enemies has received increasing attention over the past 10 years. However, much less is known about the scale at which this variation is generated and maintained, both within and across populations of the same plant species. This study compares growth and development of the large cabbage butterfly, Pieris brassicae, and its gregarious pupal parasitoid, Pteromalus puparum, on three wild populations [Kimmeridge (KIM), Old Harry (OH) and Winspit (WIN)] and two cultivars [Stonehead (ST), and Cyrus (CYR)] of cabbage, Brassica oleracea. The wild populations originate from the coast of Dorset, UK, but grow in close proximity with one another. Insect performance and chemical profiles were made from every plant used in the experiment. Foliar glucosinolates (GS) concentrations were highest in the wild plants in rank order WIN > OH > KIM, with lower levels found in the cultivars. Caterpillar-damaged leaves in the wild cabbages also had higher GS levels than undamaged leaves. Pupal mass in P. brassicae varied significantly among populations of B. oleracea. Moreover, development time in the host and parasitoid were correlated, even though these stages are temporally separated. Parasitoid adult dry mass closely approximated the development of its host. Multivariate statistics revealed a correlation between pupal mass and development time of P. brassicae and foliar GS chemistry, of which levels of neoglucobrassicin appeared to be the most important. Our results show that there is considerable variation in quantitative aspects of defensive chemistry in wild cabbage plants that is maintained at very small spatial scales in nature. Moreover, the performance of the herbivore and its parasitoid were both affected by differences in plant quality
TIM23-mediated insertion of transmembrane alpha-helices into the mitochondrial inner membrane
No full textWhile overall hydrophobicity is generally recognized as the main characteristic of transmembrane (TM) alpha-helices, the only membrane system for which there are detailed quantitative data on how different amino acids contribute to the overall efficiency of membrane insertion is the endoplasmic reticulum (ER) of eukaryotic cells. Here, we provide comparable data for TIM23-mediated membrane protein insertion into the inner mitochondrial membrane of yeast cells. We find that hydrophobicity and the location of polar and aromatic residues are strong determinants of membrane insertion. These results parallel what has been found previously for the ER. However, we see striking differences between the effects elicited by charged residues flanking the TM segments when comparing the mitochondrial inner membrane and the ER, pointing to an unanticipated difference between the two insertion systems. Keywords: CoxVa , membrane protein , Mgm1p , mitochondria , TIM2
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