[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.75 número3

... While a few exoglycosidases have been identi- fied in sand flies from the Old and New World, the biological functions of sand fly and Leishmania gly- cosidases during their interaction remains an open and ... See full document

... Let p be the reduced singularity of F whose quotient of eigenvalues is not rational nor a root of unity. If F admits an invariant algebraic curve C we can suppose without loss of generality that C is reduced and ... See full document

... Subvolcanic rocks are monzonites and quartz monzonites and occur as small intrusions around the Lavras Granite Complex. These rocks occur in two different facies: a porphyritic one with phe- nocrysts of plagioclase ... See full document

... Hermit crabs represent a very important macro- zoobenthic group within the intertidal and sublit- toral communities. They have an important role in the marine trophic chain (Fransozo et al. 1998). Consequently, ... See full document

... of radioactivity (Trivelin et al. 1979, 2002, Eriksen 1996, Máximo et al. 2000). In studies developed for the isotopic separation of 34 S, Bendassolli et al. (1997) mentioned that the use of stable isotopes is an ... See full document

... The monzodiorites are massive, leuco- to mesocratic rocks (CI: 30-35), characterized by equigranular fine- grained texture. These rocks are easily distinguished from the other varieties due to the large quantities of ... See full document

... The genus Lonchocarpus encompasses 150 species, including 24 native to Brazil. L. montanus is a new native species (A.M.G.A. Tozzi, unpublished data). The botanical classification was based on morphology of the flowers ... See full document

... Evaluation processes are slow to reflect and en- courage transformation in the direction of such action- focused science (Franklin 1997, Jacob 2001). As a result, even a supposedly application-oriented program such as ... See full document

... create an environment where the amorphous polymers of wood reach its glass transition temperatures and are softened, which allows internal tensions relieves by the molecu- lar and microstructural re-organization ... See full document

... We wish to thank the R.E.H.M. and its former direc- tor, E. Richard, for offering access to files and instal- lations, as well as C.P. Juárez, K. García, K. Soria, M. Juárez, M.C. Cocimano, R. Delgado, and I. Palacios ... See full document

... monoclonal antibodies raised against phosphoserine (Fialho et al. 2002). We next analyzed the ability of phosphorylated molecules to inhibit pNPPase ac- tivity catalyzed by partially purified AP. VT but not isolated ... See full document

... It was discussed above and elsewhere (Szapiro et al. 2000, 2002, Vianna et al. 2003) that the molec- ular changes underlying the beginnings of extinction are in all probability triggered by retrieval. Thus, at least in ... See full document

... shown an opposite effect of ...length, an effect that was abolished by treatment with α-Bgt, indicating the involvement of α7-containing nAChRs in this ...that an optimal level of intracellular ... See full document

... concentrations, an effect that is blocked by removing calcium ions from the extracellular medium, indicating that adenosine is released from retinal neurons in culture by a calcium-dependent ...by an ecto ... See full document

... 1996), an effective dog control campaign would occur with the optimization of the sensitivity of the serological assay used for ...guarantee an efficient ... See full document

... 1999). An early explanation why transgenes can be ectopically expressed was that the promoters might not contain all the sequences required for their correct tissue-specific ... See full document

... Fig. 4 – The Holocene transgressive dunefield prograded barrier system at Curumim, ∼ 150 km NE of Porto Alegre. The seaward portion is an active transgressive dunefield (a), while the vegetated portion consists of ... See full document

... have been used to stimulate ascending noradrener- gic neurons in both laboratory animals and humans, since the firing rate of LC neurons is inhibited by such receptors. The most widely used is the alka- loid yohimbine. ... See full document

... Let  be an open connected subset of R n , and consider 8() = {F ∈ C ∞ (, R n ) : det(DF)(x) 6= 0 ∀x}. We denote an element of 8() by F = (f 1 , . . . , f n ) . A very basic problem in Mathematical ... See full document

... is an urgent need to establish georeferenced baseline maps of plant and soil microbial distribution in order to evaluate future compositional changes through the ... See full document