کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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4414217 | 1307704 | 2008 | 5 صفحه PDF | دانلود رایگان |
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 °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 °C, maintaining about 80% of its original activity for salinity up to 3% and 120 min of exposure at 100 °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.
Journal: Chemosphere - Volume 71, Issue 9, April 2008, Pages 1781–1785