[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.77 número3

... On the monograph (Jouanolou 1979) it is proved that for every d ≥ 2, there exists a residual subset of the space of degree d holomorphic foliations of the projective plane whose elements do not have any invariant ... See full document

... In this survey, four reported studies with 5-HTP were found. In two of them 60 mg of L-5-HTP have been infused into the vein for 30 min and plasma cortisol was measured to assess HPA functioning (Westenberg and den Boer ... See full document

... when the sea level was about 120 m to 130 m lower (Corrêa 1995). After that time, sea level rose at an average rate of 1.2 cm/yr, but varying from 0.6 cm/yr (14 to 12 ka) to 1.9 cm/yr (8.0 to 6.5 ka). There are no ... See full document

... providing an analysis on lipid dynamics during insect development was conducted by Kinsella ...to an increase on the content of palmitic (16) and stearic (18) ...to an increase on the content of ... 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

... 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

... 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

... The LBA has self-consciously sought to improve past models of “scientific colonialism” in which North- ern-funded science experiments in less developed coun- tries did little, and usually nothing at all, to improve the ... See full document

... Since phytotoxin production is one of the mech- anisms by which rhizobacteria act against plants (Al- strom and Burns 1989, Loper and Schroth 1986), in a preliminary work crude metabolites from some rhizo- bacteria were ... See full document

... to metabolic processes, initiation and promotion of can- cer and tissue injury by free radicals, which has induced the intake of antioxidant products as chemical factors that prevent the onset of diseases (Núñez-Sellés ... See full document

... The averages for the content of diastase index do not differ (P>0.05) between the two groups. The aver- age of the diastase index in non-organic honey was 29.76 (Gothe scale) to an interval from 16.31 to 38.83, ... See full document

... The “Klason”-lignin content in the samples varied between 19.8% and 25.8%. In the heartwood samples, the lignin content was higher than in the sapwood. The higher content of “Klason”-lignin in the heartwood might be ... See full document

... the organic and reductive phases also occurred, while the carbonatic phase occurred in the speciation of Mn in less proportion, except in station 1, which showed a percentage of almost 20%. Great parts of manganese occur ... See full document

... hedral shapes; these inclusions are particularly common close to the rims of the grains. Plagioclase megacrysts are sometimes present in aggregates of 2-3 grains; they typically display normal zoning (An: 25-12, ... See full document

... Compound 1 gave a molecular ion [M] + at m /z 390.18314 in HREIMS which corresponds to C25 H 26 O 4 (calc. 390.18311). The NMR data (Table III) were very similar to those of the dibenzoylmethane derivative described ... See full document

... The Neoproterozoic shoshonitic and mildly alkaline bimodal volcanism of Southernmost Brazil is repre- sented by rock assemblages associated to sedimentary successions, deposited in strike-slip basins formed at the ... See full document

... blood eluates for sera samples had a strong impact on the decline of the disease incidence. The use of an ELISA assay for the canine control would prob- ably reduce the human cases to zero. Ashford et al. (1998) ... 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

... 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

... 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