[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.86 número4

... Inhibition of shoot growth was 40%, whereas the inhibition of root growth reached 65%, within a treatment of 3%, when compared to the control (Figure 4). The use of native plants as target-species in allelopathic studies ... See full document

... The karyotype of Salix alba is composed of six pairs of relatively large chromosomes, making it a convenient instrument for karyotypic studies (Carvalho 2005). The Tradescantia Micronuclei Test (Trad-MCN) is a common ... See full document

... Production of fibrous activated carbons from natural cellulose (jute, coconut) fibers for water treatment applications. Mechanical property evaluation of sisal–jute–glass fi[r] ... See full document

... in an extractive form and information about production technologies are essential for its seedling propagation and rational use, however, the seedling production is hampered due to the small number of seeds per ... See full document

... Although researches relate pathogenic tole rance to melanization’s reactions with consequent involvement of 22 prophenoloxidases cascade (Wilson et al. 2001), very little is known about the phenoloxidase activity in ... See full document

... with an annual precipitation of about 200 mm and characterized by closed canopy riparian forests (Roig et ...comprising an extra-Andean mountainous range located 200 km east of the ...2009). An other ... See full document

... Thymus is a double organ located behind the operculum in the dorsolateral position of gills. The thymus ontogeny and histology differ according to species, however, in general, their origin occurs 24 hours after ... See full document

... In agreement with previous investigations, in a de Sitter cosmology planetary orbits and the size of atoms remain unchanged. However, for the Einstein-de Sitter cosmology, either with a “dust” or a “radiation” equation ... See full document

... THE AVERAGING THEORY OF SECOND ORDER In this section we recall the averaging theory of second order to find periodic orbits. Theorem 3[r] ... See full document

... (Azhar et al. 2004). In this study, the extracts of cvs. Larrañaga and São Gabriel significantly (p<0.05) inhibited the mycelia growth, at least in one of the fungi tested, indicating the importance of evaluating ... See full document

... (Kacelnick 1984, Jones 1987), bees that carry pollen to the colony (Schmid-Hempel 1986), hunting-wasps that store prey in their nests (Araújo and Gonzaga 2007) and leaf-cutting ants that carry leaf fragments (Burd 2000) ... See full document

... capsule. An aliquot of this homogenized mixture of spores and water was collected using a Pasteur pipette and added to a Neubauer counting ...and an ocular micrometer we randomly measured the largest ... See full document

... Ottonia martiana is a plant popularly known in Brazil by the use for toothache. Ethanolic extract (EE), hexane fraction (HF), dichloromethane fraction (DF) and piperovatine obtained from O. martiana were assayed in vitro ... See full document

... Group composition was the same as described previously, but we are not sure if was the same group, especially with regards to the second adult. The calf was totally white in the dorsal region and in the head, which were ... See full document

... in an extracellular environment- independent ...not an isolated organelle because it has developed sophisticated mechanisms of communication with many other cellular compartments, especially the ... See full document

... The diaspores present an upper glume (Fig. 1B), a lower lemma (Fig. 1A) and a fruit-type caryopsis (Fig. 1C-D). P. dilatatum has five salient nerves in the glume, and trichomes are distributed over the entire ... See full document

... The main method to calculate rainfall erosi- vity values requires pluviographic records. This kind of information is difficult to obtain in Brazil due to the reduced number and inadequate spatial distribution of ... See full document

... Vertebrae architecture was composed by 9 lumbar, 3 sacral and 18 coccygeal vertebrae (Fig. 1). Three well- defined structures were visualized at the lombar sacral region: the lumbar intumescences (L6-L7/L8), the conus ... See full document

... has an important effect, this effect is restricted to when the canopy is actually wet, which is a relatively short period of time at monthly or longer time ... See full document

... of an adhesive tape (according to Barbosa et ...in an ethanol series, immersed in n-butyl acetate, and then mounted for permanent slides with a synthetic ... See full document