Papers by Dries Vansteenkiste
Bookmarks Related papers MentionsView impact
HAL (Le Centre pour la Communication Scientifique Directe), 2007
Bookmarks Related papers MentionsView impact
Wood Research, 2011
This study is aimed at comparing the final moisture distribution (mean MC and variability) and dr... more This study is aimed at comparing the final moisture distribution (mean MC and variability) and drying distortions of six Euramerican poplar clones (Populus deltoides x nigra) originating from a multiclonal stand using traditional kiln-drying at low temperature. The selected poplar clones yielded a different final MC after drying, implying the drying schedule needs adaptation per clone or clonal groups. An additional homogenization period of two weeks under ambient outdoor condition lowered the average final MC significantly with 2-3 %. The occurrence of wet pockets is a major concern in drying poplar lumber of which clonal differences have been demonstrated. Density and tension wood proportions are influencing factors to drying deformations (bow and crook). All clones display acceptable values for twist, while none of the clones comply to the demands concerning crook as requested for structural applications. The limitations for bow are only met by the poplar clones "Ghoy" ...
Bookmarks Related papers MentionsView impact
Annals of Botany, 2011
Bookmarks Related papers MentionsView impact
Trees, 2011
... 2009a) and understorey vegetation diversity and dynamics (Barr et al. ... 2). Except for the ... more ... 2009a) and understorey vegetation diversity and dynamics (Barr et al. ... 2). Except for the leafunfolding dynamics (see inset graphs in Fig. 2) and the time of reaching maximum LAI, the temporal pattern in LAI development almost coincided well among species and stands (Fig. ...
Bookmarks Related papers MentionsView impact
Science of The Total Environment, 2011
The uptake of trace metals in the leaves of fast-growing woody species is a crucial factor in eco... more The uptake of trace metals in the leaves of fast-growing woody species is a crucial factor in ecological risk assessment and in the evaluation of phytoextraction potentials. In this study, we present a long-term data series of foliar Cd, Zn, Mn and Cu concentrations in poplar (Populus trichocarpa x P. deltoides). Leaves were collected every three weeks from 2001 until 2007 on three sites, (i) a new plantation on an alluvial soil polluted by river sediments, (ii) a new plantation on an unpolluted soil and (iii) a 10-year old plantation on a polluted dredged sediment soil. In addition, tree rings were measured on the alluvial soil in order to better assess growth over the past seven years. Foliar concentrations of Cd, Zn and Mn decreased considerably with time in the new plantation on polluted soil. Concentrations of Zn and Mn decreased in the new plantation on unpolluted soil as well. The older plantation on polluted soil did not show changes in foliar concentrations for Cd, Zn or Mn. Foliar Cu concentrations slightly increased for all sites. Within one growing season, foliar concentrations of Cd, Zn, Cu and Mn increased towards the end of the season. The tree ring data of the poplars on the alluvial soil indicated a strong decrease in growth due to declining tree condition from 2005 onwards, the same year that foliar Cd and Zn concentrations markedly decreased. Lower transpiration rates probably induced a lower uptake of dissolved trace metals. It is concluded that stand health and growth rate have a strong impact on the variation of foliar trace metal concentrations over time.
Bookmarks Related papers MentionsView impact
European Journal of Forest Research, 2011
Bookmarks Related papers MentionsView impact
Ecological Modelling, 2008
Bookmarks Related papers MentionsView impact
Annals of Forest Science, 2007
Bookmarks Related papers MentionsView impact
Annals of Forest Science, 2004
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Een beleidsondersteunend computermodel voor duurzaam bosbeheer gebaseerd op ecofysiologische anal... more Een beleidsondersteunend computermodel voor duurzaam bosbeheer gebaseerd op ecofysiologische analyse en simulatie van boomontwikkeling. ... Eindrapport van de activiteiten over de periode 2007-2010 ... Universiteit Antwerpen, Departement Biologie, Onderzoeksgroep Planten- ...
Bookmarks Related papers MentionsView impact
Wood Research, 2008
Th e aim of this research was to evaluate the preservative treatment of willow wood in order to i... more Th e aim of this research was to evaluate the preservative treatment of willow wood in order to increase its service life in outdoor commodities (use class 3 by EN 335-1). Treated willowould bysed as garden wood (furniture, fencing,… or as more technical building products such as cladding. An evaluation of the product retention was performed as well as of the penetration profi le of the preservatives. For this study eight trees of white willow ( Salix alba), age 27, were selected in a homogeneous stand in Bree, Belgium. Th e sampling contained stem pieces taken at four diff erent height levels. Based on the treatment data, it can be concluded that treatability of willow wood with a CCA preservative following a Lowry process is not just based on one single parameter. Signifi cant intraclonal diff erences are noticed. Product retention and penetration levels are found to be much lower for heartwood and transition wood in comparison with sapwood. Th e penetration in radial direction de...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Merely 2% of the gross energy consumption in Flanders (Belgium) is covered by biomass. Key questi... more Merely 2% of the gross energy consumption in Flanders (Belgium) is covered by biomass. Key questions to be addressed are (1) how the future regional biomass supply for renewable energy production will be ensured, and (2) how this feedstock can be converted most intelligently into energy. We propose selecting and deploying highly productive poplars - in terms of both yield and quality - in short-rotation cultures (SRC) on marginal arable land. These poplars should provide readily accessible biomass that is adapted to thermochemical conversion technologies and for combined heat and power generation. Based on a theoretical scenario analysis with different yield options, it was estimated that pyrolytic intermediate products from poplar may allow significant displacements of various sources and sinks of primary energy. To evaluate the feasibility of the more ambitious scenarios, we envisage advanced comparative structural research of poplar cultivars and detailed study of the decompositi...
Bookmarks Related papers MentionsView impact
... Record Details. Record ID, 275405. Record Type, journalArticle. Author, J Steenackers; Marc S... more ... Record Details. Record ID, 275405. Record Type, journalArticle. Author, J Steenackers; Marc Stevens [801000310558] - Ghent University Marc.Stevens@UGent.be; Dries Vansteenkiste [801000980161] - Ghent University Dries.Vansteenkiste@UGent.be; V Steenackers. ...
Bookmarks Related papers MentionsView impact
X‐ray micro/nano‐CT (μCT) has recently become a very powerful and common tool for non‐destructive... more X‐ray micro/nano‐CT (μCT) has recently become a very powerful and common tool for non‐destructive 3D visualization and analysis of small objects. Many systems are commercially available, but they are typically limited in terms of resolution and/or sample size range, and come in closed cabinets, thus limiting the experimental freedom. The Centre for X‐ray Tomography of the Ghent University (UGCT, Belgium: www.ugct.ugent.be) has designed and built a state‐of‐the‐art modular micro/nano‐CT scanner. Its dual source / dual detector design attains resolutions down to 400 nm for small samples, but also allows scanning samples up to 30 cm in diameter at lower resolution. The performance of the system will be characterized in detail. Specific design elements built‐in to achieve the very high resolution will be presented, as well as the wide range of acquisition modes (helix scanning, tiled acquisition, continuous rotation, etc). A picture of the new scanner is shown in Figure 1. The scanner h...
Bookmarks Related papers MentionsView impact
Northern Red oak (Quercus rubra L.) was first used as a forest species in Belgium towards the end... more Northern Red oak (Quercus rubra L.) was first used as a forest species in Belgium towards the end of the 19 century, partly to produce construction wood for Campine coal mining industries. At present, it occupies around 5 to 6 % of the standing wood volume in Flanders. Because of its esthetic botanical qualities, it has been planted also quite abundantly in gardens, parks and along roads. Compared to Pedunculate and Sessile oak (resp. Q. robur L. and Q. petraea Liebl.), Red oak generally exhibits faster growth and, hence, is able to produce large dimension timber in relatively short time-spans. Commercial logs of 6 to 12 m length and over 70 cm diameter are not uncommon. Even though Red oak wood is generally considered to be less strong, less durable and more difficult to work than indigenous oak wood, its stemwood is well-suited for manufacturing furniture, flooring and (indoor) construction timber, while the smaller dimension thinning material and crown wood is valued as domestic ...
Bookmarks Related papers MentionsView impact
Bookmarks Related papers MentionsView impact
Uploads
Papers by Dries Vansteenkiste