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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The development of the EXE-kas
Bronchart, F. ; Demeyer, P. ; Linden, P. van der; Paepe, M. De; Vis, R. De; Wittemans, L. ; Weel, P.A. Van; Cheret, E. ; Malschaert, P. ; Tassens, S. - \ 2017
In: International Symposium on New Technologies and Management for Greenhouses - GreenSys2015 International Society for Horticultural Science (Acta Horticulturae ) - ISBN 9789462611665 - p. 453 - 460.
Dehumidification - Greenhouse - Primary energy saving - Screens - Vapour heat pump
Different primary energy saving techniques for greenhouses have been tested in the past. Those systems were designed by using the first law. However, no attention was paid to the exergy destruction in the processes (second law). This exergy destruction is related to the driving potential of the processes and the mass/energy transfer quantity, and it determines the efficiency of the system. In this paper, different energy saving techniques for greenhouses are studied based on exergy analyses at the process level. Many of the studied techniques could be labelled as "less promising". Based on this assessment, our research team select an efficient dehumidification device (vapour heat pump) and EB (Energy Balancing)-screens as most promising. A greenhouse equipped with those techniques is named "EXE-kas" (Exergy Efficient greenhouse). The prospected dehumidification efficiency of an optimal designed vapour heat pump is around 10. The use of the EB-screens results in a near neutral energy balance of the greenhouse without heating.
SWEEPER Sweet Pepper Harvesting Robot : Dissemination section on SWEEPER website ready
Hemming, J. ; Wittemans, L. - \ 2015
Horizon 2020 - 5 p.
This document describes the special section of the SWEEPER website, dedicated
to dissemination of the results of the SWEEPER project. The special section can
be found on: http://www.sweeper-robot.eu/dissemination-menu. The section
allows placing dissemination material (such as press releases, presentations,
articles in technical magazines, scientific publications, video clips and public
deliverables of the project) on the website. The dissemination section will be
regularly updated and extended once new information becomes available.
Cross-protection or enhanced symptom display in greenhouse tomato co-infected with different Pepino mosaic virus isolates
Hanssen, I.M. ; Gutiérrez-Aguirre, I. ; Paeleman, A. ; Goen, K. ; Wittemans, L. ; Lievens, B. ; Vanachter, A.C.R.C. ; Ravnikar, M. ; Thomma, B.P.H.J. - \ 2010
Plant Pathology 59 (2010)1. - ISSN 0032-0862 - p. 13 - 21.
genomic rna - sequence - protein - population - cucumber - strains - squash - time - uk
The potential of three mild Pepino mosaic virus (PepMV) isolates, belonging to the CH2, EU and LP genotypes, to protect a tomato (Solanum lycopersicum) crop against an aggressive challenge isolate of the CH2 genotype was assessed in greenhouse trials and PepMV symptoms were rated at regular time points. After challenge infection, enhanced symptom display was recorded in plants that were pre-inoculated with a protector isolate belonging to a different genotype (EU, LP) from the challenge isolate. A quantitative genotype-specific TaqMan assay revealed that in these plants, the accumulation of the challenge isolate only temporarily slowed down. By contrast, efficient cross-protection was obtained using the mild isolate of the CH2 genotype, and in this case the challenge isolate was barely detectable in the pre-inoculated plants. These results suggest that the interaction between PepMV isolates largely depends on RNA sequence homology and that post-transcriptional gene silencing plays an important role in cross-protection
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