Ribosomal Spacer
Mostrando 25-36 de 475 artigos, teses e dissertações.
-
25. DNA multigene sequencing of topotypic specimens of the fascioliasis vector Lymnaea diaphana and phylogenetic analysis of the genus Pectinidens (Gastropoda)
Freshwater lymnaeid snails are crucial in defining transmission and epidemiology of fascioliasis. In South America, human endemic areas are related to high altitudes in Andean regions. The species Lymnaea diaphana has, however, been involved in low altitude areas of Chile, Argentina and Peru where human infection also occurs. Complete nuclear ribosomal DNA 1
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-02
-
26. Molecular phylogeny of the Myzorhynchella Section of Anopheles (Nyssorhynchus) (Diptera: Culicidae): genetic support for recently described and resurrected species
Phylogenetic relationships among species of the Myzorhynchella Section of Anopheles (Nyssorhynchus) were investigated using the nuclear ribosomal DNA second internal transcribed spacer (ITS2), the nuclear whitegene and mitochondrial cytochrome oxidase subunit I (COI) regions. The recently described Anopheles pristinus and resurrected Anopheles guarani were a
Mem. Inst. Oswaldo Cruz. Publicado em: 2011-09
-
27. Beauveria bassiana: quercetinase production and genetic diversity
Beauveria bassiana genetic diversity and ability to synthesize quercetin 2,3-dioxygenase (quercetinase) were analyzed. B. bassiana isolates, obtained from Brazilian soil samples, produced quercetinase after induction using 0.5 g/L quercetin. B. bassiana ATCC 7159 (29.6 nmol/mL/min) and isolate IP 11 (27.5 nmol/ml/min) showed the best performances and IP 3a (
Brazilian Journal of Microbiology. Publicado em: 2011-03
-
28. Intragenomic variation in the second internal transcribed spacer of the ribosomal DNA of species of the genera Culex and Lutzia (Diptera: Culicidae)
Culex is the largest genus of Culicini and includes vectors of several arboviruses and filarial worms. Many species of Culex are morphologically similar, which makes their identification difficult, particularly when using female specimens. To aid evolutionary studies and species distinction, molecular techniques are often used. Sequences of the second intern
Mem. Inst. Oswaldo Cruz. Publicado em: 2011-02
-
29. Relações morfométricas e genética populacional de Culex quinquefasciatus (Diptera: Culicidae) / Morphometric relationships and population genetics of Culex quinquefasciatus
Objective. The Culex (Culex) quinquefasciatus Say 1823 is widely distributed in human settlements, and is a vector in the transmission cycles of pathogens such as arboviruses and filarids. This species belongs to Cx pipiens complex, whose main characteristic is the morphologic similarity of their species. This study aimed to characterize genetic and morpholo
Publicado em: 2011
-
30. A new mtDNA COI gene lineage closely related to Anopheles janconnae of the Albitarsis complex in the Caribbean region of Colombia
An understanding of the taxonomic status and vector distribution of anophelines is crucial in controlling malaria. Previous phylogenetic analyses have supported the description of six species of the Neotropical malaria vector Anopheles (Nyssorhynchus) albitarsis s.l. (Diptera: Culicidae): An. albitarsis, Anopheles deaneorum, Anopheles marajoara, Anopheles or
Mem. Inst. Oswaldo Cruz. Publicado em: 2010-12
-
31. Análise da diversidade fenotípica e genotípica de Enterococcus spp. isolados de fezes de suínos = Phenotypic and genotypic diversity in Enterococcus spp. isolated from pig feces / Phenotypic and genotypic diversity in Enterococcus spp. isolated from pig feces
O gênero Enterococcus está amplamente distribuído no meio ambiente e é geralmente encontrado nas fezes de animais de sangue quente. Todavia, a microbiota do trato gastrintestinal destes animais vem sofrendo alterações quanto à composição de espécies, devido ao uso de antimicrobianos. O presente trabalho teve como objetivo avaliar a diversidade de e
Publicado em: 2010
-
32. Molecular studies of Anopheles albitarsis and Anopheles triannulatus (Diptera: Culicidae) captured in flood plain breeding sites in Mato Grosso do Sul, Brazil / Estudos moleculares de Anopheles albitarsis e Anopheles triannulatus (Diptera: Culicidae) capturados em criadouro na planície de inundação do Mato Grosso do Sul, Brasil
Malaria is a severe disease whose vectors are mosquitoes belonging to the genus Anopheles. This genus contains 500 species of which approximately 45 are responsible for the worldwide transmission of these parasites. Some of these vectors belong to cryptic species such as those of the Albitarsis and Triannulatus Complex. The Albitarsis Complex is composed of
Publicado em: 2010
-
33. Desenvolvimento de um método de PCR específico para detecção de Aspergillus Flavus aflatoxigênico em grãos brasileiros
In general, foods are extremely susceptible to contamination by mycotoxin-producing fungi that affect human and animal health, with major losses common in agricultural production in Brazil. Aflatoxins are considered the most important group of mycotoxins, because of their high toxicity, hepatic-cancer-inducing properties, and common occurrence in various gra
Publicado em: 2009
-
34. Evolutionary history of Phakopsora pachyrhizi (the Asian soybean rust) in Brazil based on nucleotide sequences of the internal transcribed spacer region of the nuclear ribosomal DNA
Phakopsora pachyrhizi has dispersed globally and brought severe economic losses to soybean growers. The fungus has been established in Brazil since 2002 and is found nationwide. To gather information on the temporal and spatial patterns of genetic variation in P. pachyrhizi , we sequenced the nuclear internal transcribed spacer regions (ITS1 and ITS2). T
Genetics and Molecular Biology. Publicado em: 19/11/2008
-
35. Análise do ITS1 do DNA ribossômico em espécies do complexo Anastrepha fraterculus (Diptera: Tephritidae) / Analysis of ITS1 of ribosomal DNA in Species of the Anastrepha fraterculus complex (Diptera: Tephritidae).
Fruit flies of Tephritidae family are important pest for the worldwide fruitculture because many species use commercial variety of fruits as host for the development of thier larval stage. Anastrepha is endemic of the American Continent and comprises about 200 described species, 90 of which occurs in Brazil. Among these species the most important is the nomi
Publicado em: 2008
-
36. Utilização de DNA metagenômico para caracterização e bioprospecção de comunidades microbianas de solo de cerrado
Cerrado is an important and not very well studied biome found in Brazil. In the last two decades, this area has been rapidly converted to pastures and agricultural fields. Soil fungal microbial communities play a key role in the soil ecosystem. In the case of Cerrado stricto sensu, they are being lost before they are studied. As only a small fraction of the
Publicado em: 2008