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Browsing by Author "Mendes, Fernando 1973-"

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  • Crystalline films of L‐threonine complexed with copper (II) dispersed in a Galactomannan solution: a structural, vibrational, and thermal study
    Publication . Oliveira Neto, João G.; Cavalcante, Lincoln A.; Gomes, Eduardo S.; Dos Santos, Adenilson O.; Sousa, Francisco F; Mendes, Fernando 1973-; Macêdo, Ana Angélica M
    The study’s aim was to synthesize a crystalline film formed by L-threonine crystals complexed with Cu2+ ions (LTCu) dispersed in a galactomannan (Gal) solution as well as to characterize its structural, vibrational, and thermal properties. Gal(LTCu) films were prepared by the addition of copper II L-threoninate crystals in concentrations of 0.25, 0.50, and 0.75 in 2%Gal solution. To characterize the Gal(LTCu) properties, we used X-ray diffraction (XRD), UV–Vis and Raman spectroscopy, thermogravimetry, and thermal analyses (TG- DTA). XRD showed that the Gal(LTCu) films are crystalline and have acquired coloration similar to the one of LTCu crystal. The UV–Vis spectra revealed that the films tend to assume a square planar conformation due to Jahn Teller effect. Bands related to the interaction between the metal ion with the organic compounds were observed through the Raman spectra. TG-DTA showed that the films exhibit low thermal stability due to the dehydration process
    2019-10-01Journal article Open access Show more
  • Expression of the GBGT1 gene and the Forssman antigen in red blood cells in a Palestinian population
    Publication . Abusibaa, Wafa Ali; Srour, Mahmoud A.; Moslemi, Ali-Reza; Svensson, Lola; Jesus, Carlos; Mendes, Fernando 1973-; Hesse, Camilla
    The Forssman antigen (FORS1 Ag) is expressed on human red blood cells (RBCs). We investigated its presence on RBCs from Palestinian subjects and Swedish subjects by serological testing and by sequencing part of exon 7 of the GBGT1 gene, which encodes Forssman synthase.
    2019-01-27Journal article Open access Show more