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Search Results: 1 - 10 of 387325 matches for " Fernando da S.;Esposito "
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First record of Chrysomya rufifacies (Macquart) (Diptera, Calliphoridae) from Brazil
Silva, José O. de Almeida;Carvalho-Filho, Fernando da S.;Esposito, Maria C.;Reis, Geniana A.;
Revista Brasileira de Entomologia , 2012, DOI: 10.1590/S0085-56262012000100019
Abstract: first record of chrysomya rufifacies (macquart) (diptera, calliphoridae) from brazil. in addition to its native fauna, the neotropical region is known to be inhabited by four introduced species of blow flies of the genus chrysomya. up until now, only three of these species have been recorded in brazil - chrysomya albiceps (wiedemann), chrysomya megacephala (fabricius), and chrysomya putoria (wiedemann). in south america, c. rufifacies (macquart) has only been reported from argentina and colombia. this study records c. rufifacies from brazil for the first time. the specimens were collected in an area of cerrado (savanna-like vegetation) in the municipality of caxias in state of maranh?o, and were attracted by pig carcasses.
Uma nova espécie de Bricelochlorops Paganelli e o primeiro registro de Urubambina rufa (Duda) (Diptera: Chloropidae) para o Brasil
Carvalho Filho, Fernando S;Esposito, Maria C;
Neotropical Entomology , 2010, DOI: 10.1590/S1519-566X2010000500012
Abstract: the subfamily chloropinae comprises about 442 described species, with only one species recorded from the brazilian amazon. the genus bricelochlorops paganelli was represented by a unique species from rio de janeiro, brazil. the species urubambina rufa (duda) is the only species of the genus urubambina paganelli and has been recorded only from peru. a new species of bricelochlorops, b. celutae sp. nov., is described here and urubambina rufa is recorded for the first time in brazil. both species were collected in the state of acre. a key to species of bricelochlorops is provided.
Redescription of Pseudopomyzella flava Hennig (Diptera: Cypselosomatidae) and the first record from Brazil
Carvalho-Filho, Fernando da Silva;Esposito, Maria Cristina;
Biota Neotropica , 2011, DOI: 10.1590/S1676-06032011000100020
Abstract: cypselosomatidae is composed of cypselosomatinae and pseudopomyzinae, including 11 extant genera. only the genus rhinopomyzella hennig (pseudopomyzinae) has been previously recorded from brazil, represented by two species from santa catarina. the genus pseudopomyzella hennig is comprised of a single species, pseudopomyzella flava hennig, previously found only in peru and ecuador. here, we report p. flava for the first time from brazil (pará) and redescribe the species based on the specimens collected.
Neriidae (Diptera: Schizophora) of the Brazilian Amazon: new records of genera and species, and key to species
Carvalho-Filho, Fernando S.;Esposito, Maria C.;
Neotropical Entomology , 2008, DOI: 10.1590/S1519-566X2008000100008
Abstract: the present study brings together survey data from collection in several localities in the brazilian amazon and specimens from the entomological collection of museu paraense emílio goeldi (mpeg-belém). the flies were collected over organic decomposing matter (bananas and bovine meat) baits. the genus odontoloxozus enderlein, with the species odontoloxozus peruanus hennig, is recorded from brazil for the first time. the species glyphidops (glyphidops) flavipes (widemann), g. (oncopsia) flavifrons (bigot), g.(o.) durus (cresson) and g. (o.) dipsar (hennig) are new occurrences for brazil. the species g. (o.)carrerai aczél and n. plurivittatus bigot are new occurrences from brazilian amazon. a key to brazilian amazon species is provided.
Diversidade de Calliphoridae (Insecta: Diptera) na base de extra??o petrolífera da Bacia do Rio Urucu, na Amaz?nia brasileira
Esposito, Maria Cristina;Sousa, José Roberto Pereira de;Carvalho-Filho, Fernando da Silva;
Acta Amazonica , 2010, DOI: 10.1590/S0044-59672010000300018
Abstract: the diversity and abundance of blow flies in three environments (anthropic gaps, tree-fall gaps, and primary "terra firme" forest) of porto urucu/am were evaluated in annual collects realized in 2004, 2005, and 2006. during these three years were collected 2,121 specimens belonging to 14 species. the most abundant species were chloroprocta idioidea (robineau- desvoidy), eumesembrinella randa (walker), and hemilucilia semidiaphana (rondani). primary forests and tree-fall gaps enviroments, showed higher blow flies abundance than anthropic gaps, with diversity and equitability index higher than anthropic gaps, when the dominance value was high.
Primeiro registro de Kroeberia fuliginosa Lindner, 1930 (Diptera:Ropalomeridae) para o Estado do Pará, Brasil
Carvalho Filho, Fernando da Silva;Esposito, Maria Cristina;Santos, Rita de Cássia Oliveira dos;
Biota Neotropica , 2007, DOI: 10.1590/S1676-06032007000300041
Abstract: kroeberia fuliginosa lindner, 1930, was collected in the pará state, brazil, for the first time, extending the geographical distribution of this species.
Composi??o, abundancia e riqueza de Calliphoridae (Diptera) das matas e clareiras com diferentes coberturas vegetais da Base de Extra??o Petrolífera, bacia do Rio Urucu, Coari, Amazonas
Sousa, José Roberto Pereira de;Esposito, Maria Cristina;Carvalho Filho, Fernando da Silva;
Revista Brasileira de Entomologia , 2010, DOI: 10.1590/S0085-56262010000200010
Abstract: this research was carried out in the oil extraction field located in urucu river basin, coari, state of amazonas, brazil, during the months of april, june and october of 2007. a total of 16 areas were sampled, 12 of them were gaps and four forests, arranged in four environments (gaps litlle-recovered, gaps semi-recovered, gaps well-recovered and preserved forest). a total of 7,215 calliphorid flies was captured belonging to 16 species and only one species, chloroprocta idioidea (robineau-desvoidy, 1830), represented 88.06% of this total. the abundance patterns of the family were not different among the environments, however they were different for the following species: eumesembrinella randa (walker, 1849), hemilucilia semidiaphana (rondani, 1850) and paralucilia adespota dear, 1985 the estimated richness was significantly different between the environments and showed two groups: i, gaps litlle-recovered (c1) and gaps semi-recovered (c2); ii, gaps well-recovered (c3) and preserved forest (mt).
Diversity of Calliphoridae and Sarcophagidae (Diptera, Oestroidea) in continuous forest and gaps at different stages of regeneration in the Urucu oilfield in western Brazilian Amazonia
Sousa, José Roberto Pereira de;Esposito, Maria Cristina;Carvalho Filho, Fernando da Silva;
Revista Brasileira de Entomologia , 2011, DOI: 10.1590/S0085-56262011000400014
Abstract: diversity of calliphoridae and sarcophagidae (diptera, oestroidea) in continuous forest and gaps at different stages of regeneration in the urucu oilfield in western brazilian amazonia. the diversity of calliphoridae and sarcophagidae in continuous forest and gaps at different stages of regeneration was studied in the urucu river basin, in coari, state of amazonas, brazil. the flies were collected at 16 sampling points, 12 in gaps at different stages of regeneration (early _ c1, mid- c2 and late successional _ c3) and four in continuous forest _ mt. the diversity of blowflies was similar in the two less regenerated habitats (c1 and c2), and lower than that in the late successional (c3) and continuous forests (mt). by contrast, the diversity of flesh flies was much higher in all three types of gaps (c1, c2 and c3) in comparison with continuous forest (mt). ordination (nmds) and similarity (anosim) analyses revealed that the blowflies communities were grouped by habitat type, which affected species composition more than diversity. analysis of the flesh flies revealed two main groupings, gaps (c1, c2 and c3) and continuous forest (mt), with no evidence of any influence of successional stage on the diversity of the community.
Hyphal Morphology and Elongation Alterations in Aspergillus nidulans Provoked by the Diterpene Kaurenoic Acid  [PDF]
Janice A. Rafael, Nilton S. Arakawa, Sérgio R. Ambrosio, Fernando B. Da Costa, Suraia Said
Advances in Microbiology (AiM) , 2013, DOI: 10.4236/aim.2013.35059
Abstract:

Kaurenoic acid (KA), a kaurane-type diterpene extracted from leaves of Mikania hirsutissima, was previously reported as an inhibitor of vascular contractility mainly by blocking extracellular Ca2+ influx. The compound is known for several other biological activities such as antiparasitic, antispasmodic and antibacterial activity. The aim of the present study was to investigate the effect of KA on Aspergillus nidulans. KA (0.3 mM) showed fungistatic activity against A. nidulans with visible hyphal elongation and morphology damage. These effects were reverted by CaCl2 addition showing that KA interferes with intracellular Ca2+ gradient in A. nidulans. This is the first report on the mechanism of action of KA involving calcium levels by altering the elongation of fungi hyphae.

Transition from Majorana to Weyl fermions and anapole moments
Esposito, S.
High Energy Physics - Phenomenology , 2013,
Abstract: The apparent splitting of zero-bias conductance peaks, apparently observed in recent experiments concerning Majorana fermions in nanowires coupled to superconductors, can be interpreted as a manifestation of a transition in the structure from (massive) Majorana to (massless) Weyl fermions. A modification of the experiments in order to test such phenomenon is proposed by making recourse to the only possible electromagnetic interaction allowed to (massive) Majorana particles and mediated by their anapole moment. In suitably designed heterostructures with toroidal symmetry, the additional anapole interaction manifests itself in the lowering of the critical magnetic field required for the appearance of the zero-bias peak, a shift that can be directly measured and thus reveal the presence of Majorana (rather than Weyl) fermions. Anapole interactions, though not previously considered, may also be a powerful method to control the dynamics of Majorana fermions, and then to manipulate the qubit state in quantum computation
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