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Determining phosphors' effective quantum efficiency for remote phosphor type LED modules KU Leuven
Remote phosphor type light-emitting diodes (LEDs) are gaining popularity in all kinds of solid-state lighting applications. Main reasons are the high luminous efficiency in comparison with proximate phosphor type LED devices and the improved spatial color uniformity due to internal photon scattering. Optical properties of a high-power white LED are highly dependent on the power and the temperature of the diode junction and phosphor. For a remote ...
Microscopic study of dopant distribution in phosphors : impact on thermal quenching and phosphor performance Universiteit Gent
Red fluoride phosphors for remote phosphor LED applications Universiteit Gent
Dynamics of soil phosphorus measured by ammonium lactate extraction as a function of the soil phosphorus balance and soil properties Instituut voor Landbouw-, Visserij- en Voedingsonderzoek KU Leuven
A sustainable supply of phosphorus (P) to agricultural soils should maintain soil fertility without jeopardizing the environment. This study analyzed the change in the soil P as a function of the net soil P mass balance, i.e. the input minus removal by the harvested crop. The P available for crops was estimated by the P extracted by ammonium lactate at pH 3.75 (P-AL). First, laboratory and pot-trial data showed that the net change in soil P-AL ...
Impact of time and phosphorus application rate on phosphorus bioavailability and efficiency of secondary fertilizers recovered from municipal wastewater Universiteit Gent
Differing phosphorus crop availability of aluminium and calcium precipitated dairy processing sludge potential recycled alternatives to mineral phosphorus fertiliser Universiteit Gent
The European dairy industry generates large volumes of wastewater from milk and dairy food processing. Removal of phosphorus (P) by complexing with metal (e.g., aluminium, calcium) cations in P rich sludge is a potential P source for agricultural reuse and P recycling. However, there is a significant knowledge gap concerning the plant availability of this complexed P in comparison to conventional mineral P fertiliser. The current absence of ...
Species ecological strategy and soil phosphorus supply interactively affect plant biomass and phosphorus concentration Universiteit Gent
Internal loading of phosphorus in streams described by a Sediment-Water Exchange Model for Phosphorus (SWEMP): From lab to field scale KU Leuven
The reaction of phosphorus (P) between sediments and water in streams strongly affects the surface water P concentrations. A new reactive transport model (SWEMP: Sediment-Water Exchange Model for Phosphorus) was developed to describe redox dependent P sorption in the sediment and vertical diffusive transport of solutes to the overlying stream. The model parameters were independently obtained to first predict P release in ten different ...
Phosphorus resource partitioning shapes phosphorus acquisition and plant species abundance in grasslands Universiteit Antwerpen KU Leuven Universiteit Gent
Species diversity is commonly hypothesized to result from trade-offs for different limiting resources, providing separate niches for coexisting species(1-4). As soil nutrients occur in multiple chemical forms, plant differences in acquisition of the same element derived from different compounds may represent unique niche dimensions(5,6). Because plant productivity of ecosystems is often limited by phosphorus(7), and because plants have evolved ...