3 documents found, page 1 of 1
Estudo de coprólito da bacia sedimentar do Araripe por meios de espectroscopia ...
Lima,Ricardo Jorge Cruz; Freire,Paulo de Tarso Cavalcante; Sasaki,José Marcos; Saraiva,Antonio Álamo Feitosa; Lanfredi,SilvaniaCoprolites are fossilized faeces that constitute an important source of palaeobiological informations. This paper describes the characterization of some coprolite materials originated from the Romualdo Member of the Santana Formation (Araripe Basin, south of Ceará State in Brazil) by means of two techniques: X-ray powder diffraction and Fourier transform infrared spectroscopy (FT-IR). This characterization allo...
Caracterização espectroscópica de peixe do período cretáceo (Bacia do Araripe)
Lima,Ricardo Jorge Cruz; Saraiva,Antonio Alamo Feitosa; Lanfredi,Silvania; Nobre,Marcos Augusto de Lima; Freire,Paulo de Tarso CavalcanteThe study of fossils has made considerable progress over the last years as a result of the use of new experimental techniques. This paper describes the chemical composition of a fossilized fish of the Cretaceous period, from a 100 million-year-old, material originated from the Araripe Basin (northeastern Brazil). The chemical composition of the fossilized fish was analyzed by means of X-ray powder diffraction a...
Taninos hidrolisáveis em Bixa orellana L.
Lima,Ricardo Jorge Cruz; Moreno,Antonio Jeferson de Deus; Castro,Solange Fernanda Loureiro de; Gonçalves,José de Ribamar SantosThe aqueous material found in the fruits of Bixa Orellana L. was collected, dried, and characterized using several experimental techniques, namely phytochemical analysis in order to identify the biologically active constituents, Fourier transform infrared (FT-IR) spectroscopy for vibrational analysis, and X-ray powder diffraction in order to identify the presence of crystalline phases in the sample. The results...