A new species of allophryne (anura: allophrynidae) from the atlantic rain forest biome of eastern Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Light-emitting diode effects on combined decellularization of tracheae. A novel approach to obtain biological scaffolds

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Probing the antisymmetric Fano interference assisted by a Majorana fermion

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Distribution of constitutive heterochromatin in species of triatomines with fragmentation of sex chromosomes X

Cytogenetic analyses of triatomines are considered to be important taxonomic tools. Thus, we analyzed the pattern of constitutive heterochromatin in 7 species of triatomine with fragmentation of the sex chromosome X, focusing on the cytotaxonomy of these triatomines. The species analyzed included Triatoma vitticeps, Triatoma melanocephala, Triatoma tibiamaculata, Triatoma protracta, Meccus pallidipennis, Panstrongylus megistus, and Panstrongylus lignarius. The seminiferous tubules of the adult males were subjected to C-banding. P. megistus and P. lignarius showed differences in chromosome number and disposition of constitutive heterochromatin, as only P. lignarius showed C-blocks in autosomes. C-banding can differentiate these species, since one of the sex chromosome (X) is heterochromatic in T. vitticeps. T. protracta showed C-blocks in both ends of all autosomes, T. tibiamaculata showed terminal C-dots in some autosomal pairs and M. pallidipennis did not show constitutive heterochromatin in autosomes. Thus, we confirmed the heterochromatic pattern of 7 species of insects and emphasized the importance of cytogenetic techniques for C-banding for taxonomy studies of the triatomines, which are important vectors of Chagas disease.

Atividade epilinguística e o ensino de língua materna: um exercício com a conjunção mas

Ce texte aborde l’importance de la recherche liée à l’activité é pilinguistique, entendue comme l’activité propre du langage dans le cadre de l’enseignement de la langue maternelle. Le concept d’activité épilinguistique adopté ici est celui de la Théorie des opérations prédicatives et énonciatives élaborée parle linguiste français Antoine Culioli. Dans le but de délimiter l’objet de la recherche et de présenter un modèle d’activité applicable en salle de classe, nous avons choisi d’étudier la conjonction de coordination et d’opposition mas (mais, en français), comprise comme un marqueur lexico - grammatical. L’exercice a été proposé à une classe de septième année (la 5 ème du système français) du collège d’État Dr. Joaquim Batista, dans la ville de Jaboticabal, au Brésil. Dans le cadre de ce travail sur l’activité épilingui stique, les apprenants ont eu l’opportunité d’observer les divers contextes d’occurrence de ce marqueur, mais aussi de comprendre que les mots ne sont pas dotés d’une signification statique. En outre, ce travail a permis aux apprenants de construire leur propre connaissance et d’élaborer une grammaire plus opérationnelle et pertinente.

Fractal dimension of the mandibular trabecular bone measured on digital and digitized images.

Aims: This study compared fractal dimension (FD) values on mandibular trabecular bone in digital and digitized images at different spatial and contrast resolutions. Materials and Methods: 12 radiographs of dried human mandibles were obtained using custom-fabricated hybrid image receptors composed of a periapical radiographic film and a photostimulable phosphor plate (PSP). The film/ PSP sets were disassembled, and the PSPs produced images with 600 dots per inch (dpi) and 16 bits. These images were exported as tagged image file format (TIFF), 16 and 8 bits, and 600, 300 and 150 dpi. The films were processed and digitized 3 times on a flatbed scanner, producing TIFF images with 600, 300 and 150 dpi, and 8 bits. On each image, a circular region of interest was selected on the trabecular alveolar bone, away from root apices and FD was calculated by tile counting method. Two-way ANOVA and Tukey’s test were conducted to compare the mean values of FD, according to image type and spatial resolution (α = 5%). Results: Spatial resolution was directly and inversely proportional to FD mean values and standard deviation, respectively. Spatial resolution of 150 dpi yielded significant lower mean values of FD than the resolutions of 600 and 300 dpi ( P < 0.05). A nonsignificant variability was observed for the image types ( P > 0.05). The interaction between type of image and level of spatial resolution was not signi fi cant (P > 0.05). Conclusion: Under the tested, conditions, FD values of the mandibular trabecular bone assessed either by digital or digitized images did not change. Furthermore, these values were in fluenced by lower spatial resolution but not by contrast resolution.

Surface modified Mg-doped ZnO QDs for biological imaging

Fundação Amparo à Pesquisa Estado de São Paulo (FAPESP)

Interferência Fano antissimétrica assistida por um férmion de Majorana

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Defoliation of Terminalia catappa by Larvae of Thagona tibialis (Lepidoptera: Erebidae) in Viçosa, Brazil

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Filmes de borracha natural com nanopartículas de prata e pontos quânticos

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)