Three fungal strains were found to be capable of bioleaching rare earth elements from monazite, a rare earth phosphate mineral, utilizing the monazite as a phosphate source and releasing rare earth cations into solution. These organisms include one known phosphate solubilizing fungus, Aspergillus niger ATCC 1015, as well as two newly isolated fungi: an Aspergillus terreus strain ML3-1 and a Pae...

With improving methods and surveys, the young field of extrasolar planets has recently expanded into a qualitatively new domain terrestrial (mostly rocky) planets. The first such planets were discovered during the past year, judging by their measured masses of less than 10 Earth-masses (M⊕) or Super-Earths. They are introducing a novel physical regime that has not been explored before as such p...

Reaction of N-phenyl-pivalohydroxamic acid with Ce(III) precursors leads to a homoleptic hydroxamate complex: Ce(IV)[(t)BuC(O)N(O)Ph]4. Electrochemical experiments indicate a significant stabilization of the Ce(IV) cation at Ep,c = -1.20 V versus SCE in the hydroxamate ligand framework. The spontaneous oxidation of Ce(III) in a hydroxamate ligand field is discussed in the context of beneficiati...

To date, two planetary systems have been discovered with close-in, terrestrial-mass planets (. 5−10M⊕). Many more such discoveries are anticipated in the coming years with radial velocity and transit searches. Here we investigate the different mechanisms that could form “hot Earths” and their observable predictions. Models include: 1) in situ accretion; 2) formation at larger orbital distance f...

A major goal in the discovery and characterisation of exoplanets is to identify terrestrial-type worlds that are similar (or otherwise distinct from) our Earth. Recent results have highlighted importance applying devolatilisation -- i.e. depletion volatiles chemical composition planet-hosting stars constrain bulk interiors exoplanets. In this work, we apply such an approach a selected sample 13...

Bring home now the book enPDFd earths deep history how it was discovered and why it matters to be your sources when going to read. It can be your new collection to not only display in your racks but also be the one that can help you fining the best sources. As in common, book is the window to get in the world and you can open the world easily. These wise words are really familiar with you, isn'...

ABSTRACT While giant planet occurrence rates increase with stellar mass, of close-in super-Earths decrease. This is in contradiction to the expectation that total mass planets a system scale protoplanetary disc and hence mass. Since snow line plays an important role formation process, we examine differences temperature structure gas discs around stars different Protoplanetary likely contain dea...

Aluminum is a significant impurity in the ion-adsorption rare earth ore. The changes occurrences of aluminum have great influence on leaching In this paper, column method was employed using magnesium sulfate as agent to investigate effects pH and concentration earths. results show that at low concentrations, earths greatly enhanced, while not significantly affected by decrease agent. At high sl...