TILMAN-ORG veldproef 2012-2013 Overzicht van de werkzaamheden 2012

Omschrijving van de werkzaamheden op de TILMAN-ORG veldproef van het ILVO, in 2012

Onderzoek naar niet-kerende bodembewerking en groenbemesters: resultaten veldproeven 2013

Onderzoeksresultaten van veldproeven ikv TILMAN-ORG project op het ILVO en Inagro, tot april 2013

Kartering en waardering van een finaalpaleolithisch/mesolithisch sitecomplex te Arendonk-Korhaan (prov. Antwerpen). Boorcampagne 2003

From August to October 2003, an intensive coring campaign was conducted at Arendonk-Korhaan. The site is located in the northern Campine region on a long and regular sandy ridge, bordering a wet depression. It was previously only known from surface finds in the surrounding area. The first aim of the coring campaign was to locate any concentrations of flint artefacts. The density of the concentrations, the preservation of the soil and the conservation of the natural landscape, were also to be evaluated. Much attention was therefore paid to the setting of the site in the natural landscape. This information can also be used to determine appropriate preservation measures and to broaden ideas on future heritage-management approaches

The effect of tillage prctices on a leek crop's nitrogen utilization from a grass-clover sward

Adopting conservation agriculture practices in organic agriculture involves some risks and challenges. Nitrogen availability from a grass-clover ley for the subsequent leek crop was clearly affected by mode and timing of destruction of the grass-clover sward. Minor differences were found between a reduced tillage practice and conventional ploughing

A Biophysical Model for Cytotoxic Cell Swelling

We present a dynamic biophysical model to explain neuronal swelling underlying cytotoxic edema in conditions of low energy supply, as observed in cerebral ischemia. Our model contains Hodgkin—Huxley-type ion currents, a recently discovered voltage-gated chloride flux through the ion exchanger SLC26A11, active KCC2-mediated chloride extrusion, and ATP-dependent pumps. The model predicts changes in ion gradients and cell swelling during ischemia of various severity or channel blockage with realistic timescales. We theoretically substantiate experimental observations of chloride influx generating cytotoxic edema, while sodium entry alone does not. We show a tipping point of Na+/K+-ATPase functioning, where below cell volume rapidly increases as a function of the remaining pump activity, and a Gibbs–Donnan-like equilibrium state is reached. This precludes a return to physiological conditions even when pump strength returns to baseline. However, when voltage-gated sodium channels are temporarily blocked, cell volume and membrane potential normalize, yielding a potential therapeutic strategy