Data/hora: 29/05/2024 05:22:27

Provedor de dados: 	Brazilian Journal of Microbiology	
País: 	Brazil	
Título: 	Uptake of free and complexed silver ions by different strains of Rhodotorula mucilaginosa	
Autores: 	Gomes,Newton C.M.; Rosa,Carlos A.; Pimentel,Patrícia F.; Mendonça-Hagler,Leda C.S.	
Data: 	2002-01-01	
Ano: 	2002	
Palavras-chave: 	Bioaccumulation; Biosorption; Rhodotorula mucilaginosa; Silver.	
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.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000100013	
Editor: 	Sociedade Brasileira de Microbiologia	
Relação: 	10.1590/S1517-83822002000100013	
Formato: 	text/html	
Fonte: 	Brazilian Journal of Microbiology  v.33 n.1 2002	
Fonte: 	info:eu-repo/semantics/openAccess