Expanded bed adsorption chromatography (EBAC) is a single pass operation that has been used as primary capture step in various protein purifications. The most common problem in EBAC is often associated with successful formation of a stable fluidized bed during the absorption stage, which is critically dependent on parameters such as liquid velocity, bed height, particle (adsorbent) size and den...

I present a finite-difference method for modeling P-SV wave propagation in heterogeneous media. This is an extension of the method I previously proposed for modeling SH-wave propagation by using velocity and stress in a discrete grid. The two components of the velocity cannot be defined at the same node for a complete staggered grid: the stability condition and the P-wave phase velocity dispers...

The non-metallic inclusions are inevitable consequence of metal elaboration processes and are foreign phases always present in solid and liquid metal. The inclusions have a different shape and a size from several to several hundred micrometers (in diameter). They are randomly distributed in the matrix of the base metal and form a dispersion phase in liquid and in solid metallic phase. The non–m...