Maria Helena Roxo Beltran
Pontifícia Universidade Católica de São Paulo
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Publication
Featured researches published by Maria Helena Roxo Beltran.
Química Nova | 1998
Maria Helena Roxo Beltran
It is commonly acknowledged that the earliest recipe to prepare mineral acids dates from the XIIIth century, since it can be found in a text attributed to Geber. This paper intends to discuss this belief, taking into account recent studies on the Geberian corpus and also considering some ancient references to saltpeter.
Archive | 2014
Ana Maria Alfonso-Goldfarb; Maria Helena Roxo Beltran; Márcia H. M. Ferraz
Archive | 2004
Ana Maria Alfonso-Goldfarb; Maria Helena Roxo Beltran
Química Nova | 2010
Ana Maria Alfonso-Goldfarb; Márcia H. M. Ferraz; Maria Helena Roxo Beltran
Química Nova | 2008
Maria Helena Roxo Beltran
Circumscribere: International Journal for the History of Science | 2017
Maria Helena Roxo Beltran; Vera Cecília Machline
v. 1 (2015): I Congresso de Educação Profissional e Tecnológica do IFSP | 2015
Emerson Barão Rodrigues Soldado; Maria Helena Roxo Beltran
Circumscribere: International Journal for the History of Science | 2015
Maria Helena Roxo Beltran
História da Ciência e Ensino: construindo interfaces. ISSN 2178-2911 | 2011
Maria Helena Roxo Beltran; Fumikazu Saito
Circumscribere: International Journal for the History of Science | 2008
Maria Helena Roxo Beltran
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Dive into the Maria Helena Roxo Beltran's collaboration.
