Abstract This article introduces this thematic issue of The Ecumenical Review, which originates from a colloquium hosted at the University Western Cape on Black theologies. Our aim is to propose set theological frames through consider 11 articles presented here, as well study theology in general. We that theologies liberation can be understood within three frameworks: resistance encompasses bot...

The copper ore in Chilean porphyry deposits is often associated with molybdenum minerals. This copper–molybdenum (Cu–Mo) sulfide generally mined from various locations the mining site; thus, mineral composition, oxidation degree, particle size, and grade vary. Therefore, operation, it common to blend ores spots then process them using flotation. In this study, floatability of five types Cu–Mo b...