Interdigitated Lamella and Bicontinuous Cubic Phases Formation from Natural Cyclic Surfactin and Its Linear Derivative

Selective encapsulation of cesium ions using the cyclic peptide moiety of surfactin: Highly efficient removal based on an aqueous giant micellar system

“…Moreover, it is abundantly produced by microorganisms such as Bacillus subtilis and also regarded as a promising environment-friendly surfactant (often called biosurfactant) that exhibits high biodegradability, in addition to high surface activity, unique self-assembling properties, and low http://dx.doi.org/10.1016/j.colsurfb.2015.06.034 0927-7765/© 2015 Elsevier B.V. All rights reserved. toxicity [15][16][17][18][19]. It is reported that SF micelles can bind divalent heavy metal ions (Cu 2+ and Zn 2+ ), and can remove the elements from contaminated soils using the membrane filtration technique [20].…”

Enrichment and Isolation of Surfactin-degrading Bacteria

“…1, the HPLC profile of the remaining surfactin in the culture at day 0 is shown. Based on our previous report 20 , the three main HPLC peaks correspond to surfactin homologues having C 13 , C 14 , and C 15 β-hydroxy fatty acids, respectively. As shown in Fig.…”

Lyotropic Liquid-Crystalline Phases of Sophorolipid Biosurfactants

“…Finally, the interdigitated structure of the membranes was expected based on the bolaform, although asymmetric, character of sophorolipids. Interdigitated structures have been observed for other microbial biosurfactants, like C18:1 and C18:0 glucolipids, 36,37 surfactin, 51 or rhamnolipids, 52 and they are actually predicted by theoretical models of self-assembly of bolaform amphiphiles. 53 Compounds (2), (3), ( 5) and ( 6) are all sophorolipids bearing two symmetrical sophorose headgroups, instead of a sophorose and a carboxylic acid group for compounds (1) and (4).…”