[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.77 número2

... possesses an activity similar to that of the cambium, since the same layer of dividing cells gives rise both to the remaining layer of initial cells, as well as to the derivative layer, which will constitute the ... See full document

... for an effective radical scavenging activity is the 3, 4-orthodihydroxy configuration in ring B and 4–carbonyl group in ring C, which has the best electron donating properties and a radical ... See full document

... with a few ridges on the distal face, where a micro-ornamentation constituted by verrrucae and tubercles is observed. An equatorial ridge is also present. The exospore is two-layered; in L. venustum, it is smooth ... See full document

... coleoptiles, followed by the primary root, which is ephemeral. The rhizome originates from the mesocotyl and it promotes the vascular connection between the roots, leaves and scapes. The continuity of the tissues is ... See full document

... In shade plants, the water parenchyma has seven to nine layers of isodiametric and dorso-ventrally elongated cells in the base and in the middle of the leaves; and fi ve to seven laye[r] ... See full document

... In this paper, on the one hand, we obtain vanishing theorems of two classes of complete manifolds that satisfy weighted Poincaré inequalities (Theorems 2.2 and 2.7). At the same time, we apply Theorem 2.2 to minimal ... See full document

... collected and the solvent evaporated under reduced pressure. The lipid fraction was dried to constant weight in an oven at 60°C. Total lipids was also quantified according to the methodology of Bligh and Dyer ... See full document

... Figure 3 - Curve of the expected size of sample units (Average sample number) for the test sequential probability ratio to total population of adult Bemisia tuberculata (Hemipt[r] ... See full document

... is an additional parameter to be evaluated, especially in mass rearing that is becoming increasingly common, for the production and commercialization of parasitoids and predators in programs for Biological ... See full document

... Low fecundity species with high habitat specia- lization are most likely to suffer with populations declines (Bielby et al. 2006). Furthermore, additional attention has been dedicated to specific reproductive modes since ... See full document

... Although the cytotoxic activity of acetogenins has already been described, the high level of this activity observed in these compounds confirms their potential for being used in anti-cancer therapy. Regarding ... See full document

... After an extensive revision of the literature and the herbarium material available, this species is recorded for the first time to the State of Rio Grande do ... See full document

... the current velocities due to increasing amplitude of the tide, which contributes to expansion of the mixing process. Conversely, when there is a decrease in current velocity, the advective process generates a greater ... See full document

... be an important method for investigating the toxic and mutagenic effects of chemical substances (Andrade et ...of an organ such as the root is intimately dependent on the increase in the number of cells and ... See full document

... drated by following the technique of Rowley and Nils- son (1972) using phosphate buffer and alcian blue (AB), and then the material was fixed with glutaraldehyde + 1% AB in phosphate buffer and postfixed with 1% osmium ... See full document

... The role of serpins in schistosomiasis was last reviewed 14 years ago (Modha et al. 1996). Although there are caveats and limitations to using of the RCL sequence as an accurate predictor of protease specificity, ... See full document

... Copepods from the genus Acartia play an important role in the food webs of estuaries in both tropical and sub- tropical areas (Björnberg 1981, Mauchline 1998). Gen- erally, they show the higher biomass values in ... See full document

... relieves the phosphorous element. In the second step, oxygen and CaCO 3 are added to reduce the carbon con- tent of the melt. This produces calcium silicates such as gehlenite, larnite and bredigite (Luxan et al. 2000), ... See full document

... in an assayed sample will produce larger amounts of ...to an underestimation of ...be an- ticipated or encountered, other complementary methods in detecting cell viability may be better ... See full document

... However, the transfusion volume was frequently smaller than the desired because of the limited amount of blood available from one donor. Multiple trans- fusions were avoided in order to decrease the risk for transfusion ... See full document