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Hakimeh Sharafi, Leila Alidost, Abdolmajid Lababpour, Hossein Shahbani Zahiri, Habib Abbasi, Hojatollah Vali, Kambiz Akbari Noghabi
One hundred and sixty lactic acid bacteria, isolated from Iranian traditional dairy products, were screened for antibacterial potential. Among them, an isolate showing remarkable antibacterial activity against both Staphylococcus aureus (PTCC 1112) and Escherichia coli (PTCC 1338) was selected based on minimum inhibitory concentration (AU/mL). The morphological and biochemical characteristics of the isolate matched the literature description about genus Lactobacillus. Partial sequencing of 16S rRNA gene and its alignment with other Lactobacillus strains revealed that the isolate was closely related to the Lactobacillus plantarum...
June 2013: Probiotics and Antimicrobial Proteins
Habib Abbasi, Hakimeh Sharafi, Leila Alidost, Atefe Bodagh, Hossein Shahbani Zahiri, Kambiz Akbari Noghabi
A potent biosurfactant-producing bacterial strain isolated from spoiled apples was identified by 16S rRNA as Pseudomonas aeruginosa MA01. Compositional analysis revealed that the extracted biosurfactant was composed of high percentages of lipid (66%, w/w) and carbohydrate (32%, w/w). The surface tension of pure water decreased gradually with increasing biosurfactant concentration to 32.5 mN m(-1) with critical micelle concentration (CMC) value of 10.1 mg L(-1). The Fourier transform infrared spectrum of extracted biosurfactant confirmed the glycolipid nature of this natural product...
2013: Preparative Biochemistry & Biotechnology
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