 | | Journal (article/letter/editorial) | | enzymes in key biochemical processes. For example, Ni–Fe hydrogenases reversibly catalyze the heterolytic...conversion of dihydrogen into protons and electrons. Ni-bearing urease is a key factor in the oceanic nitrogen...interesting that the Ni proteins (e.g., methyl coenzyme M reductase and its Ni corphin coenzyme F430)... The involvement of Ni in these enzymes has led some workers to suggest that Ni associated with deep...Hall, 1997). Other researchers have suggested that Ni was involved in the early evolution of life (Frausto |  | | Conference Proceedings (Volume) | | Cover photograph: View of the Aitik open pit copper mine in the very north of Sweden. Mining operations started...The production in 2012 was 34,3 million tonnes of ore containing 67 100 tonnes of copper, 51 700 tonnes...Litzell, SGU Print: Elanders Sverige AB VOLUME 3 Ore deposits associated with mafic and ultramafic rocks...Robertson Platinum group elements in different types of Ni-laterite profiles from the northern Caribbean: a...method for the determination of metal tenors in Ni-Cu-PGE ores ....................................... |  | | Report (issue) | | cover. A handful of stibnite, which is the primary ore mineral for antimony. Antimony is widely used in...tungsten, rare-earth elements, and antimony in China; niobium in Brazil; and platinum-group elements...manganese (Mn), niobium (Nb), platinum-group elements (PGE), rare-earth elements (REE), rhenium (Re), selenium....B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012....... |  | | Book | | (1961) synthesized sulfides of Sb, Bi, Co, Cd, Fe, Ni, Pb, Cu, Pb, Zn and Ag with SRB cultures. Rickard...sulfur in the shadow of a volcano from whence the ore was being mined (Fig. 5). Henckel followed Georgious...marcasite. Te sheng bai shi (特生白石) or special white ore may have been used to describe marcasite (Zhang,...Europe (a corruption of weisserkies and also white ore), it is possible that the term was also used for...mixture of pyrite and undefined materials from various ore deposits. Polushkina and Siderenko (1963) discovered |
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