This paper reports physical and physicochemical routes for the recycling of gold, silver, copper from waste printed circuit boards (WPCBs). The results optical micrographs indicated that metals matrix are substantially separated slot after comminution process. effects various operational factors, including gravitational force fluidization water, centrifugal separators on separation performance ...

Superstring theory is one current, promising attempt at unifying gravity with the other three known forces: the electromagnetic force, and the weak and strong nuclear forces. Though this is still a work in progress, much effort has been put toward this goal. A set of specific tools which are used in this effort are gauge/gravity dualities. This thesis consists of a specific implementation of ga...

Isolation of catecholamines on prepacked gravity-fed ion-exchange columns in conjunction with liquid-chromatographic separation is occasionally subject to disturbances of unknown origin, especially after injection of H3BO3 eluates from the ion-exchange columns onto the chromatography column. Peak spreading, sometimes even peak splitting, has been observed in many laboratories--effects easily co...

We study the entanglement of purification in a field theory with momentum relaxation using gauge/gravity duality. The dual geometry is an asymptotically AdS spacetime which solution to Einestein-Hilbert action coupled axionic fields. Our show that critical separation for transition decreases as we increase dissipation parameter, hence total correlation between subsystems decreases.

Peru has produced metals for thousands of years and is the leading gold producer in Latin America today; however, indigenous mining technology used to produce industrial amounts pre-contact thus far been undescribed. Industrial are only two ways: 1) gravity separation/mercury (amalgamation), 2) cyanide. Therefore, an understanding present-day methods key past. For example, 2018, Peru’s large-sc...