Chrome Azurol
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. Estudos de culturas e atividade ligninolítica de alguns políporos (Basidiomycota) da Mata Atlântica brasileira, São Paulo, SP, Brasil
RESUMO Durante um levantamento de fungos na Mata Atlântica brasileira do Estado de São Paulo, SP, Brasil, fungos poroides crescendo em madeira em decomposição foram coletados e fragmentos dos basidiomas foram utilizados para obter culturas puras. Um total de 37 isolados foram obtidos e identificados em 23 espécies. Características das culturas de Bjerk
Hoehnea. Publicado em: 2016-06
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2. Evaluation of micro-energy dispersive X-ray fluorescence and histochemical tests for aluminium detection in plants from High Altitude Rocky Complexes, Southeast Brazil
Solos associados aos Complexos Rupestres de Altitude no Brasil destacam-se pela baixa fertilidade química, baixa saturação de bases e elevados teores de alumínio trocável. Esta condição estressante impõe pressões evolutivas que determinam o sucesso ecológico de espécies capazes de tolerar ou acumular grandes quantidades de alumínio. Vários méto
An. Acad. Bras. Ciênc.. Publicado em: 2014-03
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3. Development of sequential injection methodologies for the spectrophotometric direct and kinetic determination of aluminium in natural and waste waters
Neste artigo propõem-se duas metodologias de análise por injeção seqüencial para a determinação de alumínio reativo em águas, baseadas na reação entre o "chrome azurol S" (CAS) e o alumínio. Os métodos desenvolvidos incluem uma determinação direta e uma metodologia cinética (para aplicação a águas residuais com coloração), implementadas
Journal of the Brazilian Chemical Society. Publicado em: 2008
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4. Absence of siderophore-like activity in Legionella pneumophila supernatants.
Conflicting reports have been given as to the existence of a Legionella pneumophila siderophore. Hence, we rigorously examined the reported siderophore-like activity using the chrome azurol S indicator. Although chrome azurol S reactivity was detected in supernatants, control experiments indicate that it was due to cysteine in the media. When bacteria were c
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5. Iron-Binding Compounds Produced by Wood-Decaying Basidiomycetes †
The chrome azurol-S universal siderophore assay and the rapid paper electrophoresis siderophore assay were used to screen 10 wood-decaying basidiomycete isolates for the formation of iron-chelating compounds. All 10 isolates were positive for chrome azurol-S reactivity on solid plating medium and in liquid cultures, and 9 of the 10 isolates produced fluoresc
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6. Use of the Chrome Azurol S Agar Plate Technique To Differentiate Strains and Field Isolates of Rhizobium leguminosarum biovar trifolii
Identification of Rhizobium and Bradyrhizobium strains and especially of indigenous isolates continues to be one of the major difficulties associated with competition studies. Because there is no universally accepted method, the method of choice depends on preference, experience, and equipment. Here, an agar plate technique was used to distinguish strains an
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7. Siderophore production by Pseudomonas pseudomallei.
Eighty-four strains of Pseudomonas pseudomallei isolated from patients with melioidosis were examined for siderophore production. All the strains were shown to produce siderophore both on chrome azurol S agar plates and in liquid medium under iron-deficient conditions. Chemical assays indicated that the siderophore belongs to the hydroxamate class. Addition
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8. Acquisition of Iron by Gardnerella vaginalis
Six Gardnerella vaginalis strains were examined for the ability to utilize various iron-containing compounds as iron sources. In a plate bioassay, all six strains acquired iron from ferrous chloride, ferric chloride, ferrous sulfate, ferric ammonium citrate, ferrous ammonium sulfate, bovine and equine hemin, bovine catalase, and equine, bovine, rabbit, and h
American Society for Microbiology.
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9. Staphylococcal iron requirements, siderophore production, and iron-regulated protein expression.
Despite the ability of staphylococci to grow in iron-restricted conditions in vivo, their iron requirements and the mechanisms possessed by them for the uptake of iron are poorly understood. Many bacteria are known to produce siderophores. By using the chrome azurol S universal method for the detection of siderophores, all 14 isolates of Staphylococcus aureu
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10. Siderophore-Mediated Iron Sequestering by Shewanella putrefaciens
The iron-sequestering abilities of 51 strains of Shewanella putrefaciens isolated from different sources (fish, water, and warm-blooded animals) were assessed. Thirty strains (60%) produced siderophores in heat-sterilized fish juice as determined by the chrome-azurol-S assay. All cultures were negative for the catechol-type siderophore, whereas 24 of the 30
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11. Citrate as a siderophore in Bradyrhizobium japonicum.
Under iron-limiting conditions, many bacteria secrete ferric iron-specific ligands, generically termed siderophores, to aid in the sequestering and transport of iron. One strain of the nitrogen-fixing soybean symbiont Bradyrhizobium japonicum, 61A152, was shown to produce a siderophore when 20 B. japonicum strains were screened with all six chemical assays c
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12. Growth of Actinobacillus pleuropneumoniae is promoted by exogenous hydroxamate and catechol siderophores.
Siderophores bind ferric ions and are involved in receptor-specific iron transport into bacteria. Six types of siderophores were tested against strains representing the 12 different serotypes of Actinobacillus pleuropneumoniae. Ferrichrome and bis-catechol-based siderophores showed strong growth-promoting activities for A. pleuropneumoniae in a disk diffusio