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| 024 | 7 | _ | |a 10.3389/fchem.2020.613388 |2 doi |
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| 100 | 1 | _ | |a Engelskirchen, Sandra |0 P:(DE-HGF)0 |b 0 |e Corresponding author |
| 245 | _ | _ | |a Surfactant Monolayer Bending Elasticity in Lipase Containing Bicontinuous Microemulsions |
| 260 | _ | _ | |a Lausanne |c 2021 |b Frontiers Media |
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| 520 | _ | _ | |a Lipase-catalyzed reactions offer many advantages among which a high degree ofselectivity combined with the possibility to convert even non-natural substrates are of particular interest. A major drawback in the applicability of lipases in the conversionof synthetically interesting, non-natural substrates is the substantial insolubility of suchsubstrates in water. The conversion of substrates, natural or non-natural, by lipasesgenerally involves the presence of a water–oil interface. In the present paper, we exploit the fact that the presence of lipases, in particular the lipase from Candidaantarctica B (CalB), changes the bending elastic properties of a surfactant monolayerin a bicontinuous microemulsion consisting of D2O/NaCl -n-(d)-octane-pentaethyleneglycol monodecyl ether (C10E5) in a similar manner as previously observed for amphiphilic block-copolymers. To determine the bending elastic constant, we have used twoapproaches, small angle neutron scattering (SANS) and neutron spin echo (NSE)spectroscopy. The time-averaged structure from SANS showed a slight decrease inbending elasticity, while on nanosecond time scales as probed with NSE, a stiffening has been observed, which was attributed to adsorption/desorption mechanisms of CalB atthe surfactant monolayer. The results allow to derive further information on the influence of CalB on the composition and bending elasticity of the surfactant monolayer itself aswell as the underlying adsorption/desorption mechanism. |
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| 773 | _ | _ | |a 10.3389/fchem.2020.613388 |g Vol. 8, p. 613388 |0 PERI:(DE-600)2711776-5 |p 613388 |t Frontiers in Chemistry |v 8 |y 2021 |x 2296-2646 |
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