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- Ghojavand, H.; Vahabzadeh, F.; Mehranian, M.; Radmehr, M.; Shahraki, Kh. A.; Zolfagharian, F.; Emadi, M. A.; Roayaei, E.
- Applied microbiology and biotechnology 2008 v.80 no.6 pp. 1073-1085
- Bacillus subtilis; DNA; bacteria; biosurfactants; culture media; genes; heat tolerance; industry; infrared spectroscopy; nuclear magnetic resonance spectroscopy; oil fields; oils; petroleum; salinity; salt tolerance; sodium chloride; surface tension; temperature; thin layer chromatography
- ... Several facultative bacterial strains tolerant to high temperature and salinity were isolated from the oil reservoir brines of an Iranian oil field (Masjed-I Soleyman). Some of these isolates were able to grow up to 60°C and at high concentration of NaCl (15% w/v). One of the isolates grew at 40°C, while it was able to grow at 15% w/v NaCl. Tolerances to NaCl levels decreased as the growth tempera ...
- Sivapathasekaran, C.; Mukherjee, Soumen; Sen, Ramkrishna; Bhattacharya, Biyash; Samanta, Ramapati
- Bioprocess and biosystems engineering 2011 v.34 no.3 pp. 339-346
- bacteria; biosurfactants; culture media; desorption; infrared spectroscopy; ionization; lipopeptides; micelles; spectral analysis; ultrafiltration
- ... The extracellular biosurfactant product secreted by a marine bacterium was concentrated and purified directly from the fermentation broth in a single step by ultrafiltration (UF) employing YM 30 kDa (UF-I) and Omega 10 kDa (UF-II) polyethersulfone membranes. The optimum operating pressure required for both membranes, UF-I and UF-II, were found to be 30 and 35 psi, respectively. The biosurfactant f ...
- Ismail, Wael; Al-Rowaihi, Israa S.; Al-Humam, Abdulmohsen A.; Hamza, Riyad Y.; El Nayal, Ashraf M.; Bououdina, Mohamed
- International Biodeterioration & Biodegradation 2013 v.84 pp. 168-178
- Bacillus (bacteria); RNA; bacteria; biosurfactants; carbon; clones; culture media; emulsifiers; glucose; infrared spectroscopy; lipopeptides; operon; petroleum; ribosomal DNA; surface tension; thin layer chromatography
- ... Petroleum-polluted environmental samples were collected to isolate and characterize biosurfactant-producing bacteria. Culturing of the collected samples in LB-broth and enrichments in chemically defined medium (CDM) with various carbon sources yielded 51 strains, some of which produced biosurfactants/bioemulsifiers when challenged with crude oil as a sole carbon source. The I-15 isolate, a Gram-po ...