| Modulation of tolerance to Cr(VI) and Cr(VI) reduction by sulfate ion in a Candida yeast strain isolated from tannery wastewater. | |
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MedLine Citation:
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PMID: 18712548 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The main aim of this study was to investigate the influence of the sulfate ion on the tolerance to Cr(VI) and the Cr(VI) reduction in a yeast strain isolated from tannery wastewater and identified as Candida sp. FGSFEP by the D1/D2 domain sequence of the 26S rRNA gene. The Candida sp. FGSFEP strain was grown in culture media with sulfate concentrations ranging from 0 to 23.92 mM, in absence and presence of Cr(VI) [1.7 and 3.3 mM]. In absence of Cr(VI), the yeast specific growth rate was practically the same in every sulfate concentration tested, which suggests that sulfate had no stimulating or inhibiting effect on the yeast cell growth. In contrast, at the two initial Cr(VI) concentrations assayed, the specific growth rate of Candida sp. FGSFEP rose when sulfate concentration increased. Likewise, the greater efficiencies and volumetric rates of Cr(VI) reduction exhibited by Candida sp. FGSFEP were obtained at high sulfate concentrations. Yeast was capable of reducing 100% of 1.7 mM Cr(VI) and 84% of 3.3 mM Cr(VI), with rates of 0.98 and 0.44 mg Cr(VI)/L h, with 10 and 23.92 mM sulfate concentrations, respectively. These results indicate that sulfate plays an important role in the tolerance to Cr(VI) and Cr(VI) reduction in Candida sp. FGSFEP. These findings may have significant implications in the biological treatment of Cr(VI)-laden wastewaters. |
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Authors:
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Flor de María Guillén-Jiménez; Liliana Morales-Barrera; Jesús Morales-Jiménez; César Hugo Hernández-Rodríguez; Eliseo Cristiani-Urbina |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2008-08-20 |
Journal Detail:
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Title: Journal of industrial microbiology & biotechnology Volume: 35 ISSN: 1367-5435 ISO Abbreviation: J. Ind. Microbiol. Biotechnol. Publication Date: 2008 Nov |
Date Detail:
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Created Date: 2008-10-14 Completed Date: 2009-03-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9705544 Medline TA: J Ind Microbiol Biotechnol Country: England |
Other Details:
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Languages: eng Pagination: 1277-87 Citation Subset: IM |
Affiliation:
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Departamento de Ingeniería Bioquímica, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Prolongación de Carpio y Plan de Ayala s/n, Colonia Santo Tomás, CP 11340, Mexico DF, Mexico. |
| Data Bank Information | |
Bank Name/Acc. No.:
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GENBANK/EU563853 |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biodegradation, Environmental Candida / classification, genetics, isolation & purification, metabolism* Chromium / metabolism* DNA, Fungal / genetics Industrial Waste / analysis* Molecular Sequence Data Oxidation-Reduction Phylogeny RNA, Ribosomal / genetics Sewage / microbiology* Sulfates / metabolism* Yeasts / classification, genetics, isolation & purification, metabolism* |
| Chemical | |
Reg. No./Substance:
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0/DNA, Fungal; 0/Industrial Waste; 0/RNA, Ribosomal; 0/RNA, ribosomal, 26S; 0/Sewage; 0/Sulfates; 7440-47-3/Chromium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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