[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.74 número2

... In this work are studied periodic perturbations, depending on two parameters, of quadratic planar polynomial vector fields having an infinite heteroclinic cycle, which is an unbounded solution join- ing two ... See full document

... In an attempt to correlate these structural do- mains with specific functions of the rst-irreC gene we generated several constructs, deleting progres- sively larger portions of the cytoplasmic region of the ... See full document

... their Rare Earth Elements geochemistry, as result- ing of the tholeiitic oceanic crust melting (Barbosa and Peucat, in preparation). The Itabuna-Salvador- Curaçá Belt, also includes charnockite bodies of ∼ 2.6Ga age ... See full document

... antiinflammatory, an- timalarial, cercaricidal, schistosomicidal and also a potential activity against Trypanosoma cruzi, the causal agent of Chagas’ disease (Carvalho et ... See full document

... (d) an antigen-driven evolution of HLA- B molecules of Central and South American Indi- ans aimed at generating novel peptide specificities not provided by the limited repertoire of founder al- lotypes postulated ... 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

... between egg size and phytotelmata breeding, however they used a small sample size, since there is little comparative data of phytotelm anuran breeders, especially tropical ones. Concerning development rate, the Amazonian ... See full document

... Many studies performed with plants resulted in the development of natural antioxidant formulations. However, there is not enough scientific information about antioxidant properties of various plants, especially those ... 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

... Sarcocornia ambigua is a perennial glasswort, native of South America and a potential new seed-oil crop and forage for direct irrigation with salt water. Small seeds develop inside fertile segments of its cylindrical ... See full document

... formation of CCA in L. sativa. All these parameters were dose dependent Thus, our results recommend caution when using guava as a medicinal and phytotherapic plant. Furthermore L. sativa has proven to be an ... 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

... 2955, FUNED 2959, and of both sides in FUNED 2948, FUNED 2949, FUNED 2952, FUNED 2953 and FUNED 2960; in these specimens the temporal contacts the postocular dorsally, third supralabial ventro-anteriorly, postsupralabial ... See full document

... methanol as a direct carbon source via serine biosynthesis and 2) decreased carbon loss from photorespiration. Nonomura and Benson (1992a, b) declared that water use efficiency significantly increased in methanol treated ... See full document

... In summary, S. knerii showed the following morphological characteristics of the digestive tract: incisiform teeth, a long intestine, an intestinal coefficient value of 1.30 ± 0.17, which are compatible with the ... See full document

... Observed by SEM (Fig. 2) the spores are verrucate-tuberculate on the proximal face. Single or fused ridges are seen on the distal face. On ridge surfaces, the micro-ornamentation is verrucate-tuberculate, similar to that ... See full document

... took place at 350 ◦ C until the material became green- ish colored. Heating was maintained for an additional period of 4 h. 3 mL of water and 15 mL of 40% NaOH were added and a distillation was carried out. 5 mL ... 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

... 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