Tailings from inactive uranium mine sites represent a potential secondary source of rare earth elements (REEs). For this study, two tailings (DT and RAT) restored in Ontario, Canada, were used. Bioleaching experiments conducted with mix native sulfur- iron-oxidizing bacteria to test the solubilization REEs, U Th at different temperatures (20, 30 40 °C). The selective recovery REEs bioleaching s...

A native microorganism, Penicillium citrinum was isolated from the top soil of a manganese mine. Based on its efficiency for manganese solubilisation, it was utilized for the leaching of a low-grade manganese ore. The effects of various parameters such as pulp density, particle size, sucrose concentration, inoculum size and bioleaching duration on manganese ore were studied. The optimised condi...

BACKGROUND The loss of photosynthesis has occurred often in eukaryotic evolution, even more than its acquisition, which occurred at least nine times independently and which generated the evolution of the supergroups Archaeplastida, Rhizaria, Chromalveolata and Excavata. This secondary loss of autotrophic capability is essential to explain the evolution of eukaryotes and the high diversity of pr...