Ação tóxica do "Senecio brasiliensis", Lessing fam. compositae

Evaluation of the wound healing activity of gel formulations of leaf extract of Aspila africana Fam. Compositae

The methanol leaf extract of Aspila africana formulated as gels was studied for its potency on experimentally-induced wound in rats. Wounds were inflicted on Wistar rats using excision model. The extract was formulated as hydrogel and xerogel. The wound healing effects of the formulations were compared to that of a standard antibiotic, Cicatrin together with the gel bases. In all cases, there w...

The hierarchical system of the 'Alphaproteobacteria': description of Hyphomonadaceae fam. nov., Xanthobacteraceae fam. nov. and Erythrobacteraceae fam. nov.

Phylogenetic analysis of the class 'Alphaproteobacteria', including physiologically diverse species, was conducted by using small-subunit rRNA gene sequences. The 16S rRNA gene sequences of 261 species in the class 'Alphaproteobacteria' were obtained from GenBank/EMBL/DDBJ for constructing a phylogenetic tree by using maximum-likelihood analysis. In the resulting tree, members of the class 'Alp...

Salicylate toxicity; the probable mechanism of its action.

Os AA. focalizam a administração de alcalis còm o salicilato, oralmente, costume baseado na presunção de que o bicarbonato protege o estômago, inhibindo a libertação do ácido salicilico. Os AA. fizeram a administração oral e endovenosa de salicilato •de sódio, até o nivel plasmatico alcançar acima de 300 gammas/cc. e mantido a um alto nivel por algumas semanas, numa pequena série de casos, e ve...

Wood Anatomy of Vernonieae (Compositae)

Systematics of Isocarpha (Compositae: Eupatorieae)

Isocarpha comprises five species ranging from southern Texas and the Bahamas to northern Peru and northeastern Brazil. The genus belongs in Eupatorieae rather than Heliantheae, but structure of the head of Isocarpha with its elongate, chaffy receptacle is anomalous within Eupatorieae. An hypothesis is presented suggesting the evolutionary derivation of this type of head through formation of flo...