F. F. de Medeiros

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Poincianella pyramidalis (Tul.) LP Queiroz (Fabaceae) is an endemic tree of northeastern Brazil, occurring mainly in the Caatinga. Its medicinal use is widespread and is an important therapeutic option against diarrhea, dysentery, and respiratory and urinary infections, among other diseases. In this study we determined the chemical marker and evaluated the(More)
In this work we study the propagation of exciton–polaritons (bulk and surface modes) in a binary superlattice ABAB., truncated at zZ0, where z is defined as the growth axis. Here A is the spatially dispersive medium, which alternates with a common dielectric medium B (sapphire-Al 2 O 3). The excitonic medium (A) is modelled by a semiconductor from the(More)
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