| Registro completo |
| Provedor de dados: |
Electron. J. Biotechnol.
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| País: |
Chile
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| Título: |
Assessment of toxicity of a biosurfactant from Candida sphaerica UCP 0995 cultivated with industrial residues in a bioreactor
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| Autores: |
Bezerra de Souza Sobrinho,Humberto
de Luna,Juliana Moura
Rufino,Raquel Diniz
Figueiredo Porto,Ana Lúcia
Sarubbo,Leonie Asfora
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| Data: |
2013-07-01
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| Ano: |
2013
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| Palavras-chave: |
Biosurfactant
Bioreactor
Candida sphaerica
Industrial residues
Toxicity
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| Resumo: |
Background: The aim of the present study was to propose a low-cost method for the production of a biosurfactant by the yeast Candida sphaerica and assess its toxicity and phytotoxicity. The medium was formulated with distilled water supplemented with residue from a soy oil refinery (5%) and corn steep liquor (2.5%) as substrates. These two products were the sources of carbon and nitrogen as well as mineral elements to encourage the growth of the microorganism and production of a biosurfactant. Results: The isolated biosurfactant yield was 6.364 g/l. The biosurfactant exhibited an excellent ability to reduce surface tension (26 mN/m) and demonstrated no toxicity against seeds of Brassica oleracea, Chicoria intybus and Solanum gilo or the micro crustacean Artemia salina employed as a bioindicator. The biosurfactant exhibited no antimicrobial activity against the fungi and bacteria tested. Conclusions: The promising results obtained in this study indicate the feasibility of producing biosurfactants from powerful non-toxic organic residues and their application in the bioremediation of contaminated soil and water.
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| Tipo: |
Journal article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000400004
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| Editor: |
Pontificia Universidad Católica de Valparaíso
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| Formato: |
text/html
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| Fonte: |
Electronic Journal of Biotechnology v.16 n.4 2013
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