Taxonomic Relatedness
Mostrando 1-12 de 38 artigos, teses e dissertações.
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1. Diversidade taxonômica e formas de vida em cerrados hiperestacional e estacional no Brasil Central (Parque Nacional das Emas, GO).
As savanas, incluindo o cerrado, são caracterizadas por uma pronunciada estacionalidade, na qual a seca define o funcionamento da comunidade. No entanto, as savanas hiperestacionais experimentam, além da seca, um alagamento na estação chuvosa. Uma vez que o alagamento pode causar extinções locais de espécies intolerantes, nós nos perguntamos: As esp�
Publicado em: 2006
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2. Identification of Proteus penneri sp. nov., formerly known as Proteus vulgaris indole negative or as Proteus vulgaris biogroup 1.
The name Proteus penneri sp. nov. is proposed for a group of organisms previously called Proteus vulgaris indole negative or P. vulgaris biogroup 1. All of these strains were salicin negative, esculin negative, and chloramphenicol resistant (zone size, less than 14 mm). DNA relatedness studies indicated that when DNA from P. penneri strain 1808-73 was labele
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3. DNA characterization of the spirochete that causes Lyme disease.
Lyme disease, a tick-borne disease long recognized in Europe but only recently recognized in the United States, was shown in 1982-1983 to be caused by a spirochete, the Lyme disease spirochete. Whether one or more species of the spirochete exists is unknown, as is its taxonomic status. To answer these questions, we determined (i) the DNA base (guanidine-plus
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4. Immunological relatedness of ribosomes from mycobacteria, nocardiae and corynebacteria, and microorganisms in leprosy lesions.
Serological relatedness of ribosomes from microorganisms of the Mycobacterium, Nocardia, and Corynebacterium genera has been analyzed by the microplate immunodiffusion technique. Mycobacterium and Nocardia proved homogeneous and closely related taxa, whereas Corynebacterium was found to be a heterogeneous phylum connected by remote links to the others. The t
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5. Comparative studies of antigen 21 in Mycobacterium and Nocardia species: possible taxonomic relationships with Mycobacterium leprae.
Studies of Mycobacterium leprae, Mycobacterium tuberculosis and Nocardia caviae in comparison with each other and with other Mycobacterium and Nocardia species were performed on the basis of antigen 21 intramolecular heterogeneity. Three different antisera were used: rabbit anti-Mycobacterium smegmatis antiserum, rabbit anti-Nocardia asteroides antiserum, an
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6. Toward an objective classification of cells in the immune system.
The relative abundance of individual proteins shared among clones of lymphocytes provides a meaningful basis for cellular classification. Twelve clones of T cells (obtained by limiting dilution) were analyzed by two-dimensional gel electrophoresis for polypeptide content and then evaluated by the computational technique known as principal component analysis.
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7. Taxonomic position of deep-seated, mucosa-associated, and superficial isolates of Trichosporon cutaneum from trichosporonosis patients.
Clinical isolates of Trichosporon cutaneum, the causative agent of trichosporonosis, were identified on the basis of DNA relatedness. Of the 10 strains from deep-seated and mucosa-associated infections, 9 were identified as T. asahii and 1 was identified as T. ovoides. The two superficial strains were identified as T. cutaneum and a variety of T. montevideen
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8. Nucleic Acid Homology in the Genus Mycobacterium
Immobilized deoxyribonucleic acid (DNA) preparations from eight species of mycobacteria were reacted with labeled reference DNA from Mycobacterium tuberculosis and M. kansasii. All mycobacteria showed some degree of homology. Immobilized DNA from Pseudomonas multivorans, which has a guanine plus cytosine content within the range established for the mycobacte
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9. Taxonomic relationships among strains of the anaerobic bacterium Bacteroides ruminicola determined by DNA and extracellular polysaccharide analysis.
DNA and extracellular polysaccharide (EPS) analyses were performed on 14 strains of Bacteroides ruminicola. The guanine-plus-cytosine (G+C) base contents, determined from the buoyant densities of chromosomal DNAs, showed a broad range of values, from 37.6 to 50.9 mol%. DNA hybridization showed generally low DNA relatedness among the strains. Seven strains fo
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10. DNA Relatedness, Phenotypic Characteristics, and Antimicrobial Susceptibilities of Globicatella sanguinis Strains
DNA-DNA reassociation was performed on 15 strains of Globicatella sanguinis to compare their taxonomic status with phenotypic characterization. All 15 strains selected for DNA-DNA reassociation readily met the criteria for species relatedness. The relative binding ratio was 81% or greater at the optimal temperature and 76% or greater at the stringent tempera
American Society for Microbiology.
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11. Occurrence of lipid A variants with 27-hydroxyoctacosanoic acid in lipopolysaccharides from members of the family Rhizobiaceae.
Lipopolysaccharides (LPSs) isolated from several strains of Rhizobium, Bradyrhizobium, Agrobacterium, and Azorhizobium were screened for the presence of 27-hydroxyoctacosanoic acid. The LPSs from all strains, with the exception of Azorhizobium caulinodans, contained various amounts of this long-chain hydroxy fatty acid in the lipid A fractions. Analysis of t
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12. Characterization and taxonomic implications of the rRNA genes of Mycobacterium leprae.
The number of rRNA genes of Mycobacterium leprae was determined by restriction analysis of M. leprae total chromosomal DNA. A single set of rRNA genes was found. This set was subcloned from a cosmid library of M. leprae DNA into pUC13 and was characterized by restriction analysis and hybridization with Escherichia coli rRNA genes. The 16S, 23S, and 5S genes