| Registro completo |
| Provedor de dados: |
BJM
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| País: |
Brazil
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| Título: |
Uptake of free and complexed silver ions by different strains of Rhodotorula mucilaginosa
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| Autores: |
Gomes,Newton C.M.
Rosa,Carlos A.
Pimentel,Patrícia F.
Mendonça-Hagler,Leda C.S.
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| Data: |
2002-01-01
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| Ano: |
2002
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| Palavras-chave: |
Bioaccumulation
Biosorption
Rhodotorula mucilaginosa
Silver
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| Resumo: |
Five strains of Rhodotorula mucilaginosa were tested for the ability to accumulate free and complexed silver ions by metabolism-dependent and -independent processes. The ability to take up Ag+ was observed in both live and dead biomass, whereas silver dicyanide [Ag (CN)2-] uptake was strictly glucose dependent. In contrast to Ag (CN)2-, glucose addition inhibited by 16 to 25% the Ag+ uptake rate of living UFMG - Y02, Y27, and Y35 cells, while strains CBS 316 and UFMG-Y01 showed an improved uptake rate of about 115% and 13%, respectively. The Langmuir sorption model was used to evaluate the silver sorption capability of the R. mucilaginosa strains. The calculated q max value suggested that R. mucilaginosa strains UFMG-Y27 had the highest loading capacity. The type strain CBS 316 had the lowest q max but showed the highest affinity for silver ions. The results provided by the Fourier Transform Infra Red analysis (FTIR) suggest that C=O groups represent the main reactive site for silver uptake by the strain UFMG-Y27.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100013
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| Editor: |
Sociedade Brasileira de Microbiologia
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| Relação: |
10.1590/S1517-83822002000100013
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| Formato: |
text/html
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| Fonte: |
Brazilian Journal of Microbiology v.33 n.1 2002
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| Direitos: |
info:eu-repo/semantics/openAccess
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