Zobrazeno 1 - 5
of 5
pro vyhledávání: '"F. J. S. Lima"'
Autor:
Filho, F. J. S. Lima, Ferreira, V. M. B., Filho, P. C. F. da Silva, Gomes, F. O. da Silva, Alves, B. W. de Freitas, Barbosa, S. G. A., Santiago, T. de Melo, de Freitas, D. B.
Astrophysical data, in the domains of time, involve a wide range of stellar variability phenomena, among them the magnetic activity of the order of a few hours until the signature of an extra-solar planet which can cover a scale of time of a few days
Externí odkaz:
http://arxiv.org/abs/2209.04408
Publikováno v:
Cerâmica, Vol 51, Iss 319, Pp 252-258 (2005)
Titanatos de chumbo dopados com itérbio e ítrio, PYbT e PYT foram preparados pelo método Pechini. Os materiais obtidos foram calcinados sobre fluxo de oxigênio em diferentes temperaturas e investigados utilizando-se as técnicas de difração de
Externí odkaz:
https://doaj.org/article/4b5be441e7a54d429e796fe0f303a068
Autor:
F. J. S. Lima, F. C. Pereira
Publikováno v:
Periódico Tchê Química. 16:148-158
The present work describes a new methodology in analytical chemistry, which makes it possible to calculate the stability constant (equilibrium or formation) of the coordination compounds generated between all metallic cations in the periodic table, e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b644eeab2b865d2b7af02a343df50c7b
https://doi.org/10.52571/ptq.v16.n33.2019.163_periodico33_pgs_148_158.pdf
https://doi.org/10.52571/ptq.v16.n33.2019.163_periodico33_pgs_148_158.pdf
Publikováno v:
Periódico Tchê Química. :46-50
Electronic polarizability evaluates the deformation caused in the electronic cloud of a species, when it happens an electronic transition, usually due to the interaction of the radiation electromagnetic with the matter. Due to diversity of applicatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3d53a0c5e13b680d966e515c20b2425
https://doi.org/10.52571/ptq.v5.n10.2008.agosto/6_pgs_46_50.pdf
https://doi.org/10.52571/ptq.v5.n10.2008.agosto/6_pgs_46_50.pdf
Publikováno v:
Periódico Tchê Química. :46-50
The interaction of lanthanide nitrates (Ln–Nd, Sm, Dy and Er) and 1.10–phenantroline were studied and complexes of the general formulae Ln(NO3)3(C12H8N2)2 or Ln(NO3)3(o-fen)2. The complexes were characterized by elemental analyses (CHN), titratio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c51b3488e6750171e29120079cf5f37
https://doi.org/10.52571/ptq.v2.n04.2005.agosto/4_pgs_46_50.pdf
https://doi.org/10.52571/ptq.v2.n04.2005.agosto/4_pgs_46_50.pdf