References of "Colloids and Surfaces B : Biointerfaces"
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See detailInteraction of fengycin with stratum corneum mimicking model membranes: a calorimetry study
Eeman, Marc; Oloffson, Gerd; Sparr, Emma et al

in Colloids and Surfaces B : Biointerfaces (2014), In Press

Based on its outstanding antifungal properties, it is reasonable to believe that fengycin might be efficient to topically treat localized dermatomycoses. Since most of the fungi species involved in the ... [more ▼]

Based on its outstanding antifungal properties, it is reasonable to believe that fengycin might be efficient to topically treat localized dermatomycoses. Since most of the fungi species involved in the formation of those mycotic skin diseases colonize primarily the stratum corneum (SC), studying the interaction between fengycin and SC-mimicking lipid membranes is a primary step to determine the potential of fengycin to overcome the physical barrier of the skin. In this respect, multilamellar lipid vesicles (MLVs), with a lipid composition mimicking that of the SC, were prepared and characterized by differential scanning calorimetry (DSC). The critical micelle concentration (CMC) of fengycin was also assessed under skin conditions and found to be 1.2 ± 0.1 μM. The molecular interactions of fengycin with SC-mimicking MLVs were investigated by both DSC and isothermal titration calorimetry (ITC). Results showed that the interactions were considerably affected by changes in lipid phase behaviour. At 40 °C and below, fengycin induced exothermic changes in the lipid structures suggesting that less-ordered lipid domains became more-ordered in presence of fengycin. At 60 °C, clearly endothermic interaction enthalpies were observed, which could arise from the “melting” of remaining solid domains enriched in high melting lipids that without fengycin melt at higher temperatures. [less ▲]

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See detailPenetration behaviour of alkylbetainate chlorides into lipid monolayers
Nsimba Zakanda, Francis ULg; Nott, Katherine ULg; Paquot, Michel ULg et al

in Colloids and Surfaces B : Biointerfaces (2011), 86

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See detailInterfacial properties of oleosins and phospholipids from rapeseed for the stability of oil bodies in aqueous medium
Deleu, Magali ULg; Vaca-Medina, Guadalupe; Fabre, Jean-François et al

in Colloids and Surfaces B : Biointerfaces (2010), 80

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See detailSurface Properties Of New Virginiamycin M-1 Derivatives
Nott, Katherine ULg; Paquot, Michel ULg; Dufour, Samuel et al

in Colloids and Surfaces B : Biointerfaces (2009), 69(2),

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See detailPhysicochemical properties of low molecular weight alkylated chitosans: A new class of potential nonviral vectors for gene delivery
Ercelen, S.; Zhang, X.; Duportail, G. et al

in Colloids and Surfaces B : Biointerfaces (2006), 51(2), 140-148

Low molecular weight chitosans grafted with N-/2(3)-(dodec-2-enyl)succinoyl groups (HM-LMW-chitosans) with a mean molecular mass of 5 kDa, a degree of acetylation of 3% and a degree of tetradecenoyl ... [more ▼]

Low molecular weight chitosans grafted with N-/2(3)-(dodec-2-enyl)succinoyl groups (HM-LMW-chitosans) with a mean molecular mass of 5 kDa, a degree of acetylation of 3% and a degree of tetradecenoyl substitution (TDC) of 3-18 mol% have been synthesized. These molecules are monodisperse and soluble in water at neutral pH. Using tensiometry and Nile Red fluorescence, the HM-LMW-chitosans were found to form micelles through hydrophobic interactions involving their tetradecenoyl chains and nonprotonated glucosamine monomers. Their critical micelle concentration decreases with increasing TDC values but varies little with pH and salt. Interaction with large unilamellar vesicles taken as model membranes indicated that HM-LMW-chitosans interact mainly with vesicles mimicking the inner leaflet of biomembranes both through electrostatic and hydrophobic interactions. This preferential interaction may destabilize endosomal membranes and favor the DNA release into the cytoplasm in gene delivery applications. Moreover, since this interaction significantly decreased the membrane fluidity of these vesicles, the HM-LMC-chitosans are thought to exhibit limited lateral mobility and flip-flop ability, and thus, limited cytotoxicity. These properties suggest that the HM-LMW-chitosans may constitute a promising new class of nonviral vectors for gene therapy. (C) 2006 Elsevier B.V. All rights reserved. [less ▲]

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See detailFreezing of water bound in lichen thallus as observed by H-1 NMR. 1. Freezing of loosely bound water in Cladonia mitis at different hydration levels
Haranczyk, Hubert; Grandjean, Jean ULg; Olech, M.

in Colloids and Surfaces B : Biointerfaces (2003), 28

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See detailMicrophase separation at the surface of block copolymers, as studied with atomic force microscopy
Rasmont, A.; Leclère, Philippe; Doneux, C. et al

in Colloids and Surfaces B : Biointerfaces (2000), 19(4), 381-395

Atomic force microscopy (AFM) is used to study the phase separation process occurring in block copolymers in the solid state. The simultaneous measurement of the amplitude and the phase of the oscillating ... [more ▼]

Atomic force microscopy (AFM) is used to study the phase separation process occurring in block copolymers in the solid state. The simultaneous measurement of the amplitude and the phase of the oscillating cantilever in the tapping mode operation provides the surface topography along with the cartography of the microdomains of different mechanical properties. This technique thus allows to characterize the size and shape of those microdomains and their organization at the surface (e.g. cubic lattice spheres, hexagonal lattice of cylinders, or lamellae). In this study, a series of symmetric triblock copolymers made of a inner elastomeric sequence (poly(butadiene) or poly(alkylacrylate)) and two outer thermoplastic sequences (poly(methylmethacrylate)) is analyzed by AFM in the tapping mode. The microphase separation and their morphology are essential factors for the potential of these materials as a new class of thermoplastic elastomers. Special attention is paid to the control of the surface morphology, as observed by AFM, by the molecular structure of the copolymers (volume ratio of the sequences, molecular weight, length of the alkyl side group) and the experimental conditions used for the sample preparation. The molecular structure of the chains is completely controlled by the synthesis, which relies on the sequential living anionic polymerization of the comonomers. The copolymers are analyzed as solvent-cast films, whose characteristics depend on the solvent used and the annealing conditions. The surface arrangement of the phase-separated elastomeric and thermoplastic microdomains observed on the AFM phase images is discussed on the basis of quantitative information provided by the statistical analysis by Fourier transform and grain size distribution calculations. [less ▲]

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See detailTwo forms of lipase from Mucor miehei exhibit a different behavior at the air-water interface.
Blecker, Christophe ULg; Razafindralambo, Hary ULg; Paquot, Michel ULg et al

in Colloids and Surfaces B : Biointerfaces (1995), (3), 271-279

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