[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.83 número3

... Eugenol, 1,8-cineole, trans-caryophyllene and linalool were found to be major chemical constituents of essential oils of aerial parts from O. selloi (Table II, Figures 1, 4, 5, 6, 7, 8 and 9) in the two seasons. ... 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

... Among the thirteen B. pumilus strains studied, only the one denominated 83-20 affected lettuce, preventing seed germination. A correlation with the plant from which the bacteria were isolated seemed improbable, ... 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 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

... 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

... The Chironomidae family is one of the main groups of aquatic insects present in streams. This work aimed to investigate the influences of anthropogenic pressures and substrate types on chironomid community composition ... 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

... Simplex centroid design is very useful in establishing optimal proportions among the various components of a mixture. In ultrasound- assisted extraction, acid solutions are usually used as extracting agents due to their ... See full document

... The fish immune system is responsible for destroying microorganisms through acquired and innate components, with humoral and cellular process that perform together in an attempt to prevent the outbreak of ... 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

... 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

... 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

... 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

... In R. prolixus, VT native molecular mass is 430 and 260 kDa (Chalaye 1979). The native particles dissociate in four subunits under denaturing con- ditions. The molecular mass of the subunits are 180 kDa, 158 kDa, 50 kDa ... 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