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Search Results: 1 - 10 of 548327 matches for " Olívia Márcia N. Arantes "
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Survival and conjugal transfer between Bacillus thuringiensis strains in aquatic environment
Furlaneto, Luciana;Saridakis, Halha Ostrensky;Arantes, Olívia Márcia Nagy;
Brazilian Journal of Microbiology , 2000, DOI: 10.1590/S1517-83822000000400001
Abstract: field and laboratory studies were conducted to assess the survival of cells and spores and plasmid transfer between bacillus thuringienis strains in aquatic environment. results indicated that cells and spores of b. thuringiensis can survive for 10 days in water, without altering their number. the sporulation process began after 12-15 hours of inoculation of water. b. thuringiensis was able to transfer conjugative plasmids in the aquatic environment.
Survival and conjugal transfer between Bacillus thuringiensis strains in aquatic environment
Furlaneto Luciana,Saridakis Halha Ostrensky,Arantes Olívia Márcia Nagy
Brazilian Journal of Microbiology , 2000,
Abstract: Field and laboratory studies were conducted to assess the survival of cells and spores and plasmid transfer between Bacillus thuringienis strains in aquatic environment. Results indicated that cells and spores of B. thuringiensis can survive for 10 days in water, without altering their number. The sporulation process began after 12-15 hours of inoculation of water. B. thuringiensis was able to transfer conjugative plasmids in the aquatic environment.
Ecological aspects of Bacillus thuringiensis in an Oxisol
Ferreira, Lessandra Heck Paes Leme;Suzuki, Marise Tanaka;Itano, Eiko Nakagawa;Ono, Mário Augusto;Arantes, Olívia Márcia Nagy;
Scientia Agricola , 2003, DOI: 10.1590/S0103-90162003000100004
Abstract: bacillus thuringiensis is a gram positive, sporangial bacterium, known for its insecticidal habilities. survival and conjugation ability of b. thuringiensis strains were investigated; vegetative cells were evaluated in non-sterile soil. vegetative cells decreased rapidly in number, and after 48 hours the population was predominantly spores. no plasmid transfer was observed in non-sterile soil, probably because the cells died and the remaining cells sporulated quickly. soil is not a favorable environment for b. thuringiensis multiplication and conjugation. the fate of purified b. thuringiensis toxin was analyzed by extractable toxin quantification using elisa. the extractable toxin probably declined due to binding on surface-active particles in the soil.
Isolation and partial characterization of a mutant of Bacillus thuringiensis producing melanin
Vilas-B?as, Gislayne T.;Vilas-B?as, Laurival A.;Braz, Veridiana T.;Saridakis, Halha O.;Santos, Clelton A.;Arantes, Olívia M. N.;
Brazilian Journal of Microbiology , 2005, DOI: 10.1590/S1517-83822005000300012
Abstract: a mutant (407-p) of bacillus thuringiensis subsp. thuringiensis strain 407 producing a melanin was obtained after treatment with the mutagenic agent ethyl-methane-sulfonate. several microbiological and biochemical properties of the two strains were analyzed and the results were similar. the mutant 407-p was also incorporated into non-sterilized soil samples, recovered, easily identified, and quantified, what enables its use in ecology of b. thuringiensis.
Genome of Herbaspirillum seropedicae Strain SmR1, a Specialized Diazotrophic Endophyte of Tropical Grasses
Fábio O. Pedrosa ,Rose Adele Monteiro,Roseli Wassem,Leonardo M. Cruz,Ricardo A. Ayub,Nelson B. Colauto,Maria Aparecida Fernandez,Maria Helena P. Fungaro,Edmundo C. Grisard,Mariangela Hungria,Humberto M. F. Madeira,Rubens O. Nodari,Clarice A. Osaku,Maria Luiza Petzl-Erler,Hernán Terenzi,Luiz G. E. Vieira,Maria Berenice R. Steffens,Vinicius A. Weiss,Luiz F. P. Pereira,Marina I. M. Almeida,Lysangela R. Alves,Anelis Marin,Luiza Maria Araujo,Eduardo Balsanelli,Valter A. Baura,Leda S. Chubatsu,Helisson Faoro,Augusto Favetti,Geraldo Friedermann,Chirlei Glienke,Susan Karp,Vanessa Kava-Cordeiro,Roberto T. Raittz,Humberto J. O. Ramos,Enilze Maria S. F. Ribeiro,Liu Un Rigo,Saul N. Rocha,Stefan Schwab,Anilda G. Silva,Eliel M. Souza,Michelle Z. Tadra-Sfeir,Rodrigo A. Torres,Audrei N. G. Dabul,Maria Albertina M. Soares,Luciano S. Gasques,Ciela C. T. Gimenes,Juliana S. Valle,Ricardo R. Ciferri,Luiz C. Correa,Norma K. Murace,Jo?o A. Pamphile,Eliana Valéria Patussi,Alberto J. Prioli,Sonia Maria A. Prioli,Carmem Lúcia M. S. C. Rocha,Olívia Márcia N. Arantes,Márcia Cristina Furlaneto,Leandro P. Godoy,Carlos E. C. Oliveira,Daniele Satori,Laurival A. Vilas-Boas,Maria Angélica E. Watanabe,Bibiana Paula Dambros,Miguel P. Guerra,Sandra Marisa Mathioni,Karine Louise Santos,Mario Steindel,Javier Vernal,Fernando G. Barcellos,Rubens J. Campo,Ligia Maria O. Chueire,Marisa Fabiana Nicolás,Lilian Pereira-Ferrari,José L. da Concei??o Silva,Nereida M. R. Gioppo,Vladimir P. Margarido
PLOS Genetics , 2011, DOI: 10.1371/journal.pgen.1002064
Abstract: The molecular mechanisms of plant recognition, colonization, and nutrient exchange between diazotrophic endophytes and plants are scarcely known. Herbaspirillum seropedicae is an endophytic bacterium capable of colonizing intercellular spaces of grasses such as rice and sugar cane. The genome of H. seropedicae strain SmR1 was sequenced and annotated by The Paraná State Genome Programme—GENOPAR. The genome is composed of a circular chromosome of 5,513,887 bp and contains a total of 4,804 genes. The genome sequence revealed that H. seropedicae is a highly versatile microorganism with capacity to metabolize a wide range of carbon and nitrogen sources and with possession of four distinct terminal oxidases. The genome contains a multitude of protein secretion systems, including type I, type II, type III, type V, and type VI secretion systems, and type IV pili, suggesting a high potential to interact with host plants. H. seropedicae is able to synthesize indole acetic acid as reflected by the four IAA biosynthetic pathways present. A gene coding for ACC deaminase, which may be involved in modulating the associated plant ethylene-signaling pathway, is also present. Genes for hemagglutinins/hemolysins/adhesins were found and may play a role in plant cell surface adhesion. These features may endow H. seropedicae with the ability to establish an endophytic life-style in a large number of plant species.
Avalia??o de cultivares de mamona em cruzamentos dialélicos parciais
Nóbrega, Márcia Barreto de Medeiros;Geraldi, Isaias Olívio;Carvalho, Agnaldo Donizete Ferreira de;
Bragantia , 2010, DOI: 10.1590/S0006-87052010000200004
Abstract: castor bean (ricinus communis l.) is a very important crop in northeastern brazil. nowadays it became also important in other regions of brazil, due to the brazilian biodiesel program. the objective of the present work was to estimate general and specific combining ability for seed yield and agronomic traits in castor bean, in order to obtain a better understanding of the genetic control of these traits of breeding purposes. two groups of cultivars were studied: group 1, composed by five short stature cultivars, and group 2, composed by five tall cultivars. the two groups were crossed according to a partial diallel design, giving rise to 25 hybrid evaluated in a 5 x 5 lattice design with four replications. plots comprised of a nine meters single row spaced three meters apart (27 m2) with 10 plants. seed yield (pr), days to flowering (df), plant height (ap), height up to the primary raceme (ac), and length of primary raceme (tu) were evaluated. general combining ability (gca) was significant for all traits within each group, while specific combining ability (sca) was significant only for df and tu. the gca sum of squares was higher than sca sum of squares for all traits, indicating that additive effect loci were more important than dominant effect loci. in both groups there are cultivars with favorable alleles for yield and agronomic traits.
Curva de sobrevivência à luz ultravioleta do Azospirlllum brasilense (BEIJERIWCK, 1925)
Olivia Márcia Nagy Arantes
Semina : Ciências Sociais e Humanas , 1982, DOI: 10.5433/
Abstract: The Poem - Third and last part of a Thesis - METAPOESIA - presented no Pontifícia Universidade Católica de Porto Alegre as part of the requirements in order to obtain the degree of full-professorship. In the present study, founded on field-work" and on the metalanguage of the modern poetry, are discussed the concept, nature and species of poems. Poem, in this research, is understood not only the conventional poem but all poetic expression (mythic) of the life and the nature. In this article is discussed particularly the poem. The written poem, verbal discourse ("the poem which Poet wrote"); the poem of the life ("The poem which Somebody wrote"), and of the nature ("the poem which Nobody wrote"). Estudo do Azospirillum brasilense, bactéria fixadora de nitrogênio em gramíneas, com o objetivo de fornecer subsídios para estudos genéticos sobre o A. brasilense através da determina o da curva de sobrevivência do microrganismo à luz ultravioleta. Estabeleceu-se o tempo de exposi o à radia o de 1 minuto e obteve-se uma taxa de 5% de sobreviventes, representando uma dose recomendável para a indu o de muta es, desde que se exp e suficientemente o DNA da bactéria ao agente mutagênico, sem contudo reduzir drasticamente a popula o irradiada, o que tornaria muito baixa a frequência de mutantes após o tratamento.
New species of the treehopper tribe Amastrini (Hemiptera, Membracidae, Smiliinae)
Evangelista, Olívia;Sakakibara, Albino M.;
Revista Brasileira de Entomologia , 2007, DOI: 10.1590/S0085-56262007000100007
Abstract: three new species of amastris st?l and one of erosne st?l are described and illustrated. amastris rotheai sp. nov. (paraiba, brazil), a. gibberula sp. nov. (mato grosso, brazil), a. comarapa sp. nov. (santa cruz, bolivia), and erosne parvula sp. nov. (paraiba, brazil).
Travel, Ethnography, and Nation in the Writings of Rómulo Lachata éré and Arthur Ramos
Olívia M.G. Cunha
New West Indian Guide , 2008,
Abstract: Analyses how the traveling to and residence in the US of Arthur Ramos from Brazil and Rómulo Lachta éré from Cuba, between 1939 and 1952, influenced their (anthropological) writings on Afro-American cultures and religions, specifically with regard to the relation between nation and race. Author describes that while Ramos and Lachata éré went to the US under differing conditions, in the case of Lachata éré in exile, and had dissimilar intellectual and political perspectives, their writings during and after their stay revealed identical approaches to interpreting the relation between nation and race in respectively Brazil and Cuba. She describes how Ramos and Lachata éré developed a broader perspective on Afro-American culture, whilst moving in the same intellectual, anthropological circles, including contacts with Melville Herskovits and Fernando Ortiz, in the US. Author relates how both compared between African-Americans, in Louisiana in the case of Ramos and in New York in the case of Lachata éré, and Afro-Brazilians and Afro-Cubans (including Caribbean migrants in the US), and thus between different race relations in the US, Brazilian, and Cuban contexts.
Evaluation of acute toxicity of babassu mesocarp in mice
Barroqueiro, Elizabeth S. B.;Barroqueiro, Fernanda S. B.;Pinheiro, Mayara T.;Maciel, Márcia C. G.;Barcellos, Priscila S.;Silva, Lucilene A.;Lopes, Adelson S.;Nascimento, Flávia R. F.;Guerra, Rosane N. M.;
Revista Brasileira de Farmacognosia , 2011, DOI: 10.1590/S0102-695X2011005000121
Abstract: the safety of babassu mesocarp (orbignya phalerata mart., arecaceae), which exhibited anti-inflammatory and antithrombotic activities, was evaluated by determining the potential acute toxicity in mice. a lyophilized ethanol extract of babassu mesocarp (bme) was administered to c3h/hepas mice (10/group) in a single dose of 1000, 3000 and 5000 mg/kg, by gavage. general behavior adverse effects and mortality were determined for up to fourteen days. selected biochemical parameters including glucose, triacylglyceride, cholesterol, urea, alkaline phosphatase and creatinine were determined by colorimetric assay. the heart, liver, spleen, kidneys and brain were weighted and evaluated macro and microscopically. the median lethal dose (ld50) of bme was greater than 5000 mg/kg. no behavior or body weight alterations were detected after the treatment. the acute treatment with bme has no effect on macroscopic and microscopic aspect of examined organs. instead, bme increased the alkaline phosphatase and reduced the urea concentration in all groups. a significant increase on triacylglyceride was detected in the group bme1000. in conclusion, the acute treatment with high doses of bme can affect some biochemical parameters with a long lasting effect, although any change was detected at tissue level or body and organ weight.
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