This is a talk on joint work with Maŕıa José Chávez, Seiya Negami, Antonio Quintero, and Maŕıa Trinidad Villar. A triangulation of a 2-manifold M is a simplicial 2-complex with underlying space homeomorphic to M . The operation of contraction of an edge e in a triangulation T of M is the operation which consists in contracting e to a single vertex and collapsing each face that meets e to a sing...

The objective of this research was to carry out a survey weeds in pastures the Middle Valley Paraíba do Sul, Rio de Janeiro State, Brazil, order subsidize weed management and pasture recovery. Weed identification plant count were carried with four levels degradation, classified as low (N1), moderate (N2), strong (N3) very (N4), five replications. Thirty-nine species identified distri...

Aspergillus fumigatus is the leading cause of invasive mold infection and is a serious problem in immunocompromised populations worldwide. We have previously shown that survival of A. fumigatus in serum may be related to secretion of siderophores. In this study, we identified and characterized the sidA gene of A. fumigatus, which encodes l-ornithine N(5)-oxygenase, the first committed step in h...

An ethnobotanical study of medicinal plants was carried out among the Mitsogho people thefour (4) villages located from Oyane 4 to Four-Place (Estuaire-Gabon). The objective this firsttodraw up an inventory used in their traditional medicine against infant diarrhea and then describe recipes applied by local population. Sixteen (16) species belonging sixteen genus eleven (11) families were ident...