Luiz Everson da Silva

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In the title compound, C(18)H(19)N(3)O(3)S, the phenyl ring and the pyrazole ring are twisted with respect to each other by an angle of 49.11 (7)°. The C-N-S-C torsion angle is -122.5 (2)°. The methyl group bonded to the N atom of the pyrazole ring has a large deviation from the mean ring plane of 0.603 (3) Å. One inter-molecular N-H⋯O and two non-classical(More)
In this paper we demonstrate the terahertz propagation characteristics of 3D printed hollow core fibers with inner capillaries. The fibers were numerically characterized using a beam propagation method software. The guidance is supported by antiresonant effect and the spectral transmission was evaluated until 1.6 THz. Special designs were proposed exploring(More)
In this investigation we report, to the best of our knowledge, the first realization of air-core optical fibers obtained by drawing a 3D printed preform. Two different optical fibers are presented. Descriptions on the preform preparation and fiber drawing are provided, and our preliminary results are presented.
AIM The present study was undertaken to evaluate the acute and subchronic antihyperglycemic effects of methanolic extract of Bowdichia virgilioides root bark of B. virgilioides in streptozotocin (STZ)-induced diabetic rats. MATERIALS AND METHODS The extract (100, 250 or 500 mg/kg) was orally administered to male Wistar diabetic (STZ, 42 mg/kg i.v.) and(More)
In the title compound, [Zn(C(17)H(14)Cl(2)N(3)O(3)S)(2)(H(2)O)(2)], the Zn(II) ion has a tetra-hedral coordination formed by the two N atoms of the sulfonamide groups and the two water mol-ecules. Two inter- and two intra-molecular O-H⋯O hydrogen bonds are observed in the crystal structure.
In the present paper 12 N-quinolin-8-yl-arylsulfonamides synthesized by coupling 8-aminoquinolines with various arylsulfonylchlorides were assayed in vitro against Leishmania amazonensis, Leishmania chagasi and Trypanosoma cruzi strains. This series of new compounds were found to be selective for Leishmania spp. promastigote and amastigote forms. The most(More)
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