Highlights The bulk density of woodchips in denitrifying bioreactors the field is unknown. In situ estimation methods were developed for use during construction or excavation. Dry densities aged at bioreactor bottoms lower than previous literature values. Moisture and particle size explained some, but not all, variation densities. Abstract . Woodchip a governs system hydraulics, this prime phys...

This paper takes a look at the properties of electron density profiles at the metal surfaces; this was done by calculating the properties in the bulk, at the surface and just outside the metal surface using the equations proposed by Kiejna and Wojciechowski. The results obtained shows that; in the bulk of metals, electron density profile depends inversely on the concentration of the electrons a...