Autor: Wilson, B. P. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Behavior of gallium and germanium associated with zinc sulfide concentrate in oxygen pressure leaching
Autorzy:: Liu, F.
Liu, Z.
Li, Y.
Wilson, B. P.
Lundstrom, M.
Powiązania:: https://bibliotekanauki.pl/articles/110812.pdf
Data publikacji:: 2017
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:: zinc sulfide concentrate
gallium
germanium
pyrite
oxygen pressure leaching
Opis:: The Fankou zinc concentrate (Guangdong province, China) was mineralogically characterized and results showed that the main germanium-bearing minerals in the sample comprised of zinc sulfide and galena, whereas gallium-bearing minerals were pyrite, sphalerite and silicate. Oxygen pressure leaching of zinc sulfide concentrate was carried out in order to investigate the effect of pressure, leaching time, sulfuric acid and copper concentrations on the leaching behavior of gallium and germanium. Under optimum conditions, leaching of Zn, Fe, Ge and Ga reached 98.21, 90.45, 97.45 and 96.65%, respectively. In the leach residues, it was determined that some new precipitates, such as PbSO4, CaSO4 and SiO2, were formed, which co-precipitated a certain amount of Ga and Ge from the leach solution. The results clearly indicated that Ga and Ge were much more difficult to leach than Zn, and provided answers to why the leaching efficiency of Ga is 10% lower when compared to Ge.
Źródło:: Physicochemical Problems of Mineral Processing; 2017, 53, 2; 1047-1060
1643-1049
2084-4735
Pojawia się w:: Physicochemical Problems of Mineral Processing
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: First tyrannosaurid remains from the Upper Cretaceous “El Gallo” Formation of Baja California, Mexico
Autorzy:: Peecook, B.R.
Wilson, J.A.
Hernandez-Rivera, R.
Montellano-Ballesteros, M.
Wilson, G.P.
Powiązania:: https://bibliotekanauki.pl/articles/21150.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Paleobiologii PAN
Opis:: We report a complete left fourth metatarsal collected from rocks of the Upper Cretaceous (Campanian) “El Gallo” Formation exposed along the Pacific Ocean near El Rosario, Baja California, México. The metatarsal IV was part of an arctometatarsalian metatarsus, as evidenced by a deep medial notch proximally and extensive articulation for metatarsal III. This condition, along with the U-shape of the proximal end, supports identification as tyrannosauroid. It is assigned to Tyrannosauridae based on features on the posterior surface of the shaft, but finer taxonomic resolution is not possible. Compared to other tyrannosauroids, the metatarsal is relatively short, closely resembling the proportions of the gracile Albertosaurus sarcophagus rather than the much more massive, robust metatarsals of Tyrannosaurus rex. The Baja tyrannosaurid metatarsal is shorter than almost all other tyrannosauroid fourth metatarsals, raising the possibility that it pertains to an immature individual. North American tyrannosauroids are best known from the northern coast of the Western Interior Seaway, as well as less frequently on the southern coast of the seaway in Utah and New Mexico. The new record in Baja marks the first unambiguous skeletal material of a tyrannosaurid both in México and along the Pacific coast.
Źródło:: Acta Palaeontologica Polonica; 2014, 59, 1
0567-7920
Pojawia się w:: Acta Palaeontologica Polonica
Dostawca treści:: Biblioteka Nauki

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