title: Exopolysaccharides and antimicrobial biosurfactants produced by Paenibacillus macerans TKU029.
abstract: Paenibacillus macerans TKU029 can produce exopolysaccharides (EPSs; 3.46 g/L) and a biosurfactant (1.78 g/L) in a medium with 2 % (w/v) squid pen powder as the sole carbon/nitrogen source. The biosurfactant can reduce the surface tension of water from 72.30 to 35.34 mN/m at a concentration of 2.76 g/L and reach an emulsification index of 56 % after a 24-h reaction with machine oil. This biosurfactant is stable at 121 °C for 20 min, over a pH range from 3 to 11, and in <5 % salt solutions. It also shows significant antimicrobial activity, which remains active after treatment at 121 °C and at pH values from 4 to 10, against Escherichia coli BCRC13086, Staphylococcus aureus BCRC10780, Fusarium oxysporum BCRC32121 and Aspergillus fumigatus BCRC30099. Furthermore, human skin shows from 37.3 to 44.3 % hydration after being treated with TKU029 EPSs for 180 min. These results imply that EPSs and the biosurfactant from this strain have potential in cosmetics, for removal of oil contamination, and as antimicrobial agents.
authors.forename: Tzu-Wen
authors.initials: TW
authors.lastname: Liang
authors.forename: Chia-Chen
authors.initials: CC
authors.lastname: Wu
authors.forename: Wei-Ting
authors.initials: WT
authors.lastname: Cheng
authors.forename: Yu-Chi
authors.initials: YC
authors.lastname: Chen
authors.forename: Chuan-Lu
authors.initials: CL
authors.lastname: Wang
authors.forename: I-Li
authors.initials: IL
authors.lastname: Wang
authors.forename: San-Lang
authors.initials: SL
authors.lastname: Wang
mesh_terms: D000890:Anti-Infective Agents / Q000494:pharmacology*; D001419:Bacteria / Q000187:drug effects; D004655:Emulsions / Q000737:chemistry; D005260:Female; D005658:Fungi / Q000187:drug effects; D006801:Humans; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D008823:Micelles; D008826:Microbial Sensitivity Tests; D056507:Paenibacillus / Q000187:drug effects / Q000254:growth & development / Q000378:metabolism*; D011135:Polysaccharides, Bacterial / Q000096:biosynthesis* / Q000494:pharmacology*; D054712:Salinity; D013500:Surface Tension / Q000187:drug effects; D013501:Surface-Active Agents / Q000494:pharmacology*; D013696:Temperature; D013997:Time Factors; D055815:Young Adult
chemical_list: D000890:Anti-Infective Agents; D004655:Emulsions; D008823:Micelles; D011135:Polysaccharides, Bacterial; D013501:Surface-Active Agents