Uptake of free and complexed silver ions by yeasts isolated from a gold mining industry in Brazil.

Gomes, Newton C.M.; Rosa, Carlos A.; Pimentel, P.F.; Linardi, Valter R.; Mendonça-Hagler, Lêda C.

doi:10.2323/jgam.45.121

Cited by 3 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rhodotorula mucilaginosa (Syn. Rhodotorula rubra) strain UFMG-Y27 was able to survive at concentrations of Ag (CN)2-up to 40 mg l -1 , and had the highest ability to take up this compound compared to all other yeasts tested (15). By the light of interesting results obtained in our previous work we have attempted to study four R. mucilaginosa strains previously isolated (15) and the type strain (CBS 316).…”

Section: Introductionmentioning

confidence: 99%

“…Rhodotorula rubra) strain UFMG-Y27 was able to survive at concentrations of Ag (CN)2-up to 40 mg l -1 , and had the highest ability to take up this compound compared to all other yeasts tested (15). By the light of interesting results obtained in our previous work we have attempted to study four R. mucilaginosa strains previously isolated (15) and the type strain (CBS 316). They were characterized taxonomically and investigated for their ability to remove free (Ag + ) and complexed [Ag (CN)2-] silver ions from dilute aqueous solutions by metabolism-dependent and -independent processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Uptake of free and complexed silver ions by different strains of Rhodotorula mucilaginosa

Gomes¹,

Rosa²,

Pimentel

et al. 2002

Braz. J. Microbiol.

View full text Add to dashboard Cite

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 qmax value suggested that R. mucilaginosa strains UFMG-Y27 had the highest loading capacity. The type strain CBS 316 had the lowest qmax 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.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%