[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.78 número3

... constitutes an important tool for N cycling studies in living organisms, also minimizing labor and environmental hazards, as well as time limitation problems in field ... See full document

... et al. 1998). This study is part of a contribution to improve the knowledge of the hermit crab commu- nities living on the infralittoral rocky bottom (An- chieta Island, Ubatuba), in order to provide infor- mation ... 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

... The births of brown brocket deer (Mazama gouazoubira) in a secondary lower montane forest called “yunga” in northwestern Argentina were compared with rainfall. Analyses were performed with rainfall and flower-fruit fall ... See full document

... ent. An example is 2,4-dichlorophenylacetic acid (2,4- D), which is commercially employed as a herbicide, but can be used as an auxin to promote plant growth in tis- sue cultures (Pasqual ... 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

... 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

... is an increase of their ductibility due to their amorphous components of viscoelastic properties (lignin and hemicelluloses), which are responsible for wood softening and its relief from growth stress levels ... 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

... 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

... 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

... similar. A reason is that both obey the all-or-none rule. Interestingly, the tissue mosaicism in trans- genic and chimeric mice is similar and that may in- dicate similarity of their temporal parameters (Mor- ley et al. ... 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 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

... 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

... cal Africa, Asia and South America (Gupta 1994), many of which are used in folk medicine, as spices and also to control insects (Grayer et al. 1996). Moreover, there is an economic exploitation by large-scale ... See full document