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Search Results: 1 - 10 of 304541 matches for " Alcir Teixeira;Smania Júnior "
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Antibacterial activity of orsellinates
Gomes, Alcir Teixeira;Smania Júnior, Artur;Seidel, Cintia;Smania, Elza de Fátima Albino;Honda, Neli Kika;Roese, Fernanda Mesquita;Muzzi, Rozanna Marques;
Brazilian Journal of Microbiology , 2003, DOI: 10.1590/S1517-83822003000300002
Abstract: in order to obtain new compounds with antibacterial activity, the derivatives 2,4-dihydroxy-6-methylbenzoic acid (orsellinic acid) and 2,4-dihydroxy-6-methylbenzoates (orsellinates) were obtained through alcoholyses of lecanoric acid. all these substances were tested against gram-positive and gram-negative bacteria by a microdilution method. staphylococcus aureus, xanthomonas campestris var. vesicatoria and ralstonia solanacearum were most sensitive to n-propyl 2,4-dihydroxy-6-methylbenzoate, n-pentyl 2,4-dihydroxy-6-methylbenzoate and n-hexyl 2,4-dihydroxy-6-methylbenzoate with mic (minimal inhibitory concentration) values ranging from 62.5 to 7.8 μg×ml1. these results showed that homologation in carbon chain may lead to compounds with more pronunced activities.
Cinnabarin synthesis by Pycnoporus sanguineus strains and antimicrobial activity against bacteria from food products
Smania, Elza de Fátima Albino;Smania Júnior, Artur;Loguercio-Leite, Clarice;
Revista de Microbiologia , 1998, DOI: 10.1590/S0001-37141998000400017
Abstract: among three strains of pycnoporus sanguineus, mip 89007 produced more cinnabarin than mip 95001 and mip 95002. the antimicrobial activity of cinnabarin was tested against 11 species of bacteria isolated from food. bacillus cereus and leuconostoc plantarum were the most sensitive to cinnabarin, being inhibited by 0.0625 mg/ml. klebsiella pneumoniae was the least sensitive (>4.0 mg/ml).
Cinnabarin synthesis by Pycnoporus sanguineus strains and antimicrobial activity against bacteria from food products
Smania Elza de Fátima Albino,Smania Júnior Artur,Loguercio-Leite Clarice
Revista de Microbiologia , 1998,
Abstract: Among three strains of Pycnoporus sanguineus, MIP 89007 produced more cinnabarin than MIP 95001 and MIP 95002. The antimicrobial activity of cinnabarin was tested against 11 species of bacteria isolated from food. Bacillus cereus and Leuconostoc plantarum were the most sensitive to cinnabarin, being inhibited by 0.0625 mg/ml. Klebsiella pneumoniae was the least sensitive (>4.0 mg/ml).
Diversity of the genus Listeria in slaughterhouse and factories of the poultry industry
Miguel ?ngelo Pinho,Roberto Degenhardt,Artur Smania Júnior
Biotemas , 2006,
Abstract: One of the aims of microbial diversity studies is to indicate the structure of a community in a specific place, allowing species identification and population quantification. Food factories need to be monitored for contamination by surface analyses, indicating a possible flux of pathogens in order that they may be interrupted before the contamination of the final product occurs. Combining studies of microbial diversity with contamination control programs, it is possible to identify species and to track possible routes of contamination. The study was restricted to an important bacterium affecting a single sample factory. The genus Listeria comprises six species, and L. monocytogenes is a human pathogenic bacterium. The study pointed to the uninterrupted flux of two species of the genus (L. innocua and L. welshimeri) from possible sources of contamination to points of contact with the final product. However, the bacterium L. monocytogenes was only found at the sources. Concerning genus diversity, a community of 66.07% of L. innocua, 17.86% of L. monocytogenes, 15.18% of L. welshimeri and 0.89% L. grayi murray was identified.
Submerged culture conditions for the production of mycelial biomass and antimicrobial metabolites by Polyporus tricholoma Mont.
Vieira, Gladys Rosane Thomé;Liebl, Mariane;Tavares, Lorena Benathar Ballod;Paulert, Roberta;Smania Júnior, Artur;
Brazilian Journal of Microbiology , 2008, DOI: 10.1590/S1517-83822008000300029
Abstract: basidiomycete fungi of the polyporus genus are a source of secondary metabolites which are of medicinal interest as antibacterial compounds. as these substances are produced in a small amount by the fungi, the study of the cultivation conditions in vitro that could possibly optimize their production seems of major importance. the effects of glucose and lactose, ph and agitation on biomass concentration and on the specific growth rate caused by the basidiomycete polyporus tricholoma were investigated. the initial ph (4.5, 6.5 and 8.5) was autoregulated at ph 5.5, and the agitation increased the mycelial growth and the specific growth rate. the high concentration of carbon sources (4%) increased biomass production. the lactose concentration and the absence of agitation were determinant in the production of antibacterial metabolites. the characterization of the antibacterial substance by gc-ms indicated a major compound, isodrimenediol, produced by the fungus polyporus tricholoma with activity against staphylococcus aureus.
Desvelando o invisível: os movimentos sociais na pesca e suas a??es no estuário do Pará
Potiguar Júnior, Petr?nio Lauro Teixeira;
Boletim do Museu Paraense Emílio Goeldi. Ciências Humanas , 2007, DOI: 10.1590/S1981-81222007000300006
Abstract: this paper presents reflections which have not been modified during the years, and relate to the causes and consequences of the actions of the social movements and the people that are involved in them who try to create alternatives of surviving for farmers, fishermen, etc. the methodology used in the analysis was the participant observation, and the use of interviews made among leaders of the community, fishermen of marudá and leaders of the movimento nacional dos pescadores (monape) and of the conselho pastoral da pesca (cpp). the aim here is to show theoretical perspectives for the understanding of the social movements involving the fishermen in the northeast of pará and to be a way of attracting the attention of the government, ongs, social movements and all organizations related to the fishing, in order to to promote and guarantee a social and political organization whose objective is not only financial but also directed to the political consciousness of the fishermen, throughout forums of discussions so they may claim for their social demands in the global context of necessity, conflict and violence andindividual rights.
Sequence similarity between the viral cp gene and the transgene in transgenic papayas
Souza Júnior, Manoel Teixeira;Gonsalves, Dennis;
Pesquisa Agropecuária Brasileira , 2005, DOI: 10.1590/S0100-204X2005000500009
Abstract: the papaya ringspot virus (prsv) coat protein transgene present in 'rainbow' and 'sunup' papayas disclose high sequence similarity (>89%) to the cp gene from prsv br and th. despite this, both isolates are able to break down the resistance in 'rainbow', while only the latter is able to do so in 'sunup'. the objective of this work was to evaluate the degree of sequence similarity between the cp gene in the challenge isolate and the cp transgene in transgenic papayas resistant to prsv. the production of a hybrid virus containing the genome backbone of prsv ha up to the apa i site in the nib gene, and downstream from there, the sequence of prsv th was undertaken. this hybrid virus, prsv ha/th, was obtained and used to challenge 'rainbow', 'sunup', and an r2 population derived from line 63-1, all resistant to prsv ha. prsv ha/th broke down the resistance in both papaya varieties and in the 63-1 population, demonstrating that sequence similarity is a major factor in the mechanism of resistance used by transgenic papayas expressing the cp gene. a comparative analysis of the cp gene present in line 55-1 and 63-1-derived transgenic plants and in prsv ha, br, and th was also performed.
A diferen a como alternativa para administrar os conflitos nas cidades
Carlos teixeira de Campos Júnior
Geografares , 2000,
Abstract: Discute uma outra vis o de cidade, diferente daquela do senso comum, que admite que as cidadestêm problemas porque n o tiveram planejamentoou porque foram mal planejadas. Mostra que essavis o n o tem sustenta o conceitual. Toma comoreferência o conceito de cidade que privilegia aapresenta o dos interesses e dos conflitos envolvidos na constru o da cidade e fornece possibilidades de apontar caminhos alternativos para a administra o desses conflitos sempre presentes noscentros urbanos.
Redes de pequenas empresas: a aplica o de uma tipologia em uma rede de supermercados.
Israel Ferreira Júnior,Rivanda Meira Teixeira
Revista de Administra??o Mackenzie , 2007,
Abstract: O presente estudo teve como objetivo analisar as características de uma rede do setor de comércio varejista, a Rede Econ mica de Supermercados, de acordo com a tipologia de redes de empresas proposta por Hoffmann et al. (2004). Além disso, buscou-se identificar quais s o os principais benefícios e dificuldades verificados na operacionaliza o da Rede. A partir de entrevistas realizadas com o gestor administrativo da Rede e com um gerente de compras, e com base na análise de documentos e material institucional, pode-se classificar a Rede como de coopera o horizontal, aglomerada, formal e n o-orbital. As principais vantagens percebidas para os supermercados, com rela o à participa o na rede, foram a realiza o de a es de marketing e de compras conjuntas. A principal dificuldade apontada reside na concilia o dos objetivos do negócio com os objetivos individuais.
Seguran a Sul-Americana e a Centralidade do Conselho de Defesa Sul-Americano para a Ordem Regional
Augusto Wagner Menezes Teixeira Júnior
Meridiano 47 : Boletim de Análise de Conjuntura em Rela??es Internacionais , 2010,
Abstract: Abordamos a conjuntura de seguran a sul-americana e o papel do CDS-Unasul como um mecanismo de gerencia regional em assuntos estratégicos.
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