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Colloids facilitate cadmium and uranium transport in an undisturbed soil: A comparison of soil solution isolation methods KU Leuven
Accurate data of cadmium (Cd) and uranium (U) leaching are needed in the context of identifying their mass balances in agricultural soils. There is some controversy related to sampling methods and the contribution of colloid facilitated transport. Here, leaching was measured in undisturbed unsaturated soils and the impact of colloids was measured with due attention to solution sampling protocols. Soils were sampled in an arable, pH neutral silty ...
Type I error inflation in DIF identification with Mantel-Haenszel: An explanation and a solution KU Leuven
© The Author(s) 2014. It is known that sum score-based methods for the identification of differential item functioning (DIF), such as the Mantel–Haenszel (MH) approach, can be affected by Type I error inflation in the absence of any DIF effect. This may happen when the items differ in discrimination and when there is item impact. On the other hand, outlier DIF methods have been developed that are robust against this Type I error inflation, ...
Drivers of population genetic differentiation in the wild: isolation by dispersal limitation, isolation by adaptation and isolation by colonization Research Institute for Nature and Forest KU Leuven
Empirical population genetic studies have been dominated by a neutralist view, according to which gene flow and drift are the main forces driving population genetic structure in nature. The neutralist view in essence describes a process of isolation by dispersal limitation (IBDL) that generally leads to a pattern of isolation by distance (IBD). Recently, however, conceptual frameworks have been put forward that view local genetic adaptation as ...
Comparison between superior vena cava ablation in addition to pulmonary vein isolation and standard pulmonary vein isolation in patients with paroxysmal atrial fibrillation with the cryoballoon technique Vrije Universiteit Brussel
BACKGROUND: Paroxysmal atrial fibrillation (PAF) can be triggered by non-pulmonary vein foci, like the superior vena cava (SVC). The latter is correlated with improved result in terms of freedom from atrial tachycardias (ATs), when electrical isolation of this vessel utilizing radiofrequency energy (RF) is achieved.
OBJECTIVES: Evaluate the clinical impact, in patients with PAF, of the SVC isolation (SVCi) in addition to ordinary ...
Forksheet FETs with Bottom Dielectric Isolation, Self-Aligned Gate Cut, and Isolation between Adjacent Source-Drain Structures Interuniversity Microelectronics Centre
We report on forksheet field-effect transistors that are isolated from the substrate by bottom dielectric isolation (BDI) formed by replacing a SiGe epitaxial layer with a dielectric film while the devices are anchored to the substrate by forksheet walls. Functional unipolar forksheet devices with BDI are demonstrated for both N- and PMOS, for wall widths down to 10 nm. In addition, we describe a scheme to isolate adjacent source-drain ...
A Comparison of Cell-Free DNA Isolation Kits Isolation and Quantification of Cell-Free DNA in Plasma University of Antwerp
The analysis of cell-free DNA (cfDNA) as a sensitive biomarker for cancer diagnosis and monitoring has resulted in a need for efficient and standardized cfDNA isolation. In this study, we compared the isolation efficiency of the QIAamp circulating nucleic acid kit (QIA) with four other cfDNA isolation kits: the PME free-circulating DNA Extraction Kit (PME), the Maxwell RSC ccfDNA Plasma Kit (RSC), the EpiQuick Circulating Cell-Free DNA Isolation ...