C
Carmen Luisa Barbosa Guedes
Researcher at Universidade Estadual de Londrina
Publications - 40
Citations - 924
Carmen Luisa Barbosa Guedes is an academic researcher from Universidade Estadual de Londrina. The author has contributed to research in topics: Electron paramagnetic resonance & Hyperfine structure. The author has an hindex of 14, co-authored 37 publications receiving 818 citations. Previous affiliations of Carmen Luisa Barbosa Guedes include Federal University of Rio de Janeiro.
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Biochemical, physiological, and histological changes in the neotropical fish Prochilodus lineatus exposed to diesel oil
TL;DR: The results showed the activation of biotransformation pathways for xenobiotics, through a time-dependent increase of liver GST activity, caused a decrease in hematocrit and hemoglobin content, very likely due to hemolysis.
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Visible light superoxide radical anion generation by tetra(4-carboxyphenyl)porphyrin/TiO2: EPR characterization
Carlos Diaz-Uribe,Martha C. Daza,Fernando Martínez,Edgar A. Páez-Mozo,Carmen Luisa Barbosa Guedes,Eduardo Di Mauro +5 more
TL;DR: In this paper, the superoxide radical anion O2− from tetra(4-carboxyphenyl)porphyrin (TCPP) adsorbed on TiO2 in DMSO and irradiated by visible light was studied using EPR spectroscopy.
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Photochemical processes and the environmental impact of petroleum spills
TL;DR: A review of the photochemical processes involved in the degradation of petroleum, its products, and some model compounds found in petroleum is given in this article, with an emphasis on processes which affect emulsification, water solubility, and toxicity.
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Photochemistry of petroleum: I. Systematic study of a brazilian intermediate crude oil
TL;DR: The photochemical weathering of a crude Brazilian petroleum as a film over sea-water by sunlight has been studied using a combination of analytical tools including elemental analysis, GC, UV-VIS, IR, Fluorescence, and NMR.
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Photochemical weathering study of Brazilian petroleum by EPR spectroscopy
TL;DR: The EPR spectrum of the petroleum of the Campos Basin, Rio de Janeiro, Brazil shows signals characteristic of free radical, vanadyl (VO 2+ ) and iron III ion (Fe 3+ ). The value of g =2.0045±0.0001 corresponds to free radical species with a peak-to-peak line width Δ H =4.64± 0.03 G as discussed by the authors.