| Autor: |
Prieto LM; Bioprocess Engineering Laboratory, Federal University of Rio Grande, 96201-900 Rio Grande, RS, Brazil., Michelon M, Burkert JF, Kalil SJ, Burkert CA |
| Jazyk: |
angličtina |
| Zdroj: |
Chemosphere [Chemosphere] 2008 Apr; Vol. 71 (9), pp. 1781-5. Date of Electronic Publication: 2008 Mar 04. |
| DOI: |
10.1016/j.chemosphere.2008.01.003 |
| Abstrakt: |
The production and properties of a rhamnolipid-type biosurfactant, synthesized by the Pseudomonas aeruginosa LBM10 strain, isolated from a southern coastal zone in Brazil, were investigated. The assays were conducted in a rotary shaker at 30 degrees C and 180 rpm for a period of 96 h. Soybean oil and sodium nitrate were the best sources of carbon and nitrogen, respectively. A nitrogen-limiting condition (C/N ratio of 100) was favorable to biosurfactant production. The formation of stable emulsions was better in saline concentrations below 0.5%, pH values in the range from 6 to 9 and temperatures in the range from 35 to 40 degrees C, maintaining about 80% of its original activity for salinity up to 3% and 120 min of exposure at 100 degrees C. The biosurfactant may be produced with this microorganism using renewable substrates that are readily available, reaching values of 1.42 g l(-1) measured as rhamnose. This biosurfactant has interesting and useful properties for many industrial applications. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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