DocumentCode
3346658
Title
Notice of Retraction
Structure and Characterization of a Biosurfactant Produced by Pseudomonas aeruginosa Strain KO9
Author
Zheng Li ; Chaocheng Zhao ; Yunbo Zhang ; Dongfeng Zhao
Author_Institution
Coll. of Chem. & Chem. Eng., China Univ. of Pet., Qingdao, China
fYear
2011
fDate
10-12 May 2011
Firstpage
1
Lastpage
4
Abstract
Notice of Retraction
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Pseudomonas aeruginosa strain KO9, isolated from petroleum-contaminated soil in Karamay oil filed (China) was used to produce biosurfactant. The biosurfactant could reduce surface tension to 28 mN/m and emulsified diesel up to E24 of 81% with a critical micelle concentration of approximately 85.82 mg/L. The dried biosurfactant was light yellow powder, and the yield was 1.0866 g/L. Fourier transform infrared (FT-IR) spectrum of extracted biosurfactant indicates the key component is glycolipid primarily consisting of lipid and carbohydrate. The crude biosurfactant showed comparable stability over a wide range of pH, temperatures and high salt concentrations, as compared to the two commercial surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethyl ammonium bromide (CTAB). It has potential for use in a variety of biotechnological and industrial applications.
After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.
We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.
The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.
Pseudomonas aeruginosa strain KO9, isolated from petroleum-contaminated soil in Karamay oil filed (China) was used to produce biosurfactant. The biosurfactant could reduce surface tension to 28 mN/m and emulsified diesel up to E24 of 81% with a critical micelle concentration of approximately 85.82 mg/L. The dried biosurfactant was light yellow powder, and the yield was 1.0866 g/L. Fourier transform infrared (FT-IR) spectrum of extracted biosurfactant indicates the key component is glycolipid primarily consisting of lipid and carbohydrate. The crude biosurfactant showed comparable stability over a wide range of pH, temperatures and high salt concentrations, as compared to the two commercial surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethyl ammonium bromide (CTAB). It has potential for use in a variety of biotechnological and industrial applications.
Keywords
Fourier transform spectra; biotechnology; contamination; crude oil; drying; infrared spectra; microorganisms; oil pollution; petroleum; powders; soil pollution; surfactants; Fourier transform infrared spectrum; Karamay oil filed; Pseudomonas aeruginosa strain K09; biotechnological applications; carbohydrate; cetyltrimethyl ammonium bromide; crude biosurfactant; dried biosurfactant characterization; dried biosurfactant structure; emulsified diesel; glycolipid; industrial applications; light yellow powder; petroleum contaminated soil; salt concentrations; sodium dodecyl sulfate; surface tension; Biotechnology; Manganese; Microorganisms; Stability criteria; Strain; Surface tension; Thermal stability;
fLanguage
English
Publisher
ieee
Conference_Titel
Bioinformatics and Biomedical Engineering, (iCBBE) 2011 5th International Conference on
Conference_Location
Wuhan
ISSN
2151-7614
Print_ISBN
978-1-4244-5088-6
Type
conf
DOI
10.1109/icbbe.2011.5781593
Filename
5781593
Link To Document