[PDF] Top 20 An. Acad. Bras. Ciênc. - vol.75 número1

... The wave form display was used to measure call rate and call duration. Call duration was difficult to determine precisely in several of the recordings due to background noise in the broadcast channel of the frog call. ... See full document

... particulates in the polymer skeleton. For example, embedding gold or gold-coated silica nanoparticles into a thermally responsive hydrogel induces light-wavelength-sensitive swelling to achieve optically ac- tive ... See full document

... Hydrated smectite clays such as montmorillonite are lamellar mineral crystals composed of charged layers separated by an aqueous solution. They exhibit special features towards hydration and ion fixation ... See full document

... The observed reductions in seed viability after storage at room temperature may be the result of increased seed respiratory activity, with subsequent reductions of germinative quality as a consequence of an ... See full document

... An additional piece of information may shed some light on the situation. Of the 102 most qualified Brazilian academic economists, 71% obtained their PhD in the US or Europe (mostly in UK). This is well above the ... See full document

... as an adaptive condition to progressive neuronal loss with age, as greater functional demand is required from these neurons, which could result in a state of cellular ... See full document

... Our results (Table II) indicate that the number of females that were developed through seven instars (19.149%) was much higher than males (6.015%), an aspect still unexplored for representatives of Noctuidae. ... See full document

... Therefore, we consider the shared characteristics to be morphological convergences due to their similar habitat use, and we include the new species putatively in the genus Tmesiphante[r] ... See full document

... Air temperature greatly influences the seed physiological quality and germinative behavior (Daws et al. 2004, 2006, Lamarca et al. 2011). However, for E. pyriformis seeds, the air temperature influence represented by GDD ... See full document

... Among the interesting features of this crest is the presence of several shallow channels (Figs. 3-4). On the right lateral side there is one central channel that runs sub parallel to the ventral border of the skull. ... See full document

... needs an accurate description of rapid potential variations inside double layers, which can be computationally ...is an useful and necessary ...developping an alternative theoretical approximation ... See full document

... fesa identificou três estratégias comuns a diferentes espécies de animais, desencadeadas por situações de perigo predatório potencial, distal ou proximal, respectivamente. A primeira consiste na investigação cautelosa do ... See full document

... with an unusually expanded crista prootica and the presence of an anterior prolongation of the parasphenoid reaching the basal tubera were not reported in other members of the Titanosauridae, indicating a ... See full document

... Different cultures see the appearance of other insect species with funereal signs. The Aymara peo- ple from Bolivia took the presence of a certain rare moth as an omen of death. And the ancient Mexicans feared one ... See full document

... 2 AN is significantly larger than k 4 AN in each of the films, (2) that k 2 AN is almost the same in the two films at comparable temperatures, and (3) that the rate of formation of 4AN is slowed much ... See full document

... ene (Takaishi et al. 1997) along with the NOE cross peak between H-17 and H-14 α in the 1 H- 1 H- NOESY spectrum led us to established an equato- rial position for the C-17 methyl group, such as in the ... See full document

... D E M OURA KCG, E MERY FS, P INTO CN, P INTO MCRF, D ANTAS AP, S ALOMÃ O K, C ASTRO SL AND P INTO AV. 2001. Trypanocidal activity of isolated naphtho-qui- nones from Tabebuia and some heterocyclic derivatives: A review ... See full document

... for an electron to surpass the potential barrier and be freed from the metal in vacuum, whereas the ionization potential is defined as the minimum energy necessary to remove an electron from the ... See full document

... Lastly, engineers are driven by a fourth paradigm that can be called the technological paradigm, in which a commitment to developing technologies for process or product is at the heart of scientific production. ... See full document

... in an ethyl alcohol series, critical-point dried with liquid carbon dioxide (CO 2 ), and coated with gold in a Denton Vacuum Sputter Coater (Denton Vacuum, LLC, Moorestown, NJ, ... See full document