Journal ArticleDOI
Interfacial Activity and Interfacial Shear Rheology of Native β-Lactoglobulin Monomers and Their Heat-Induced Fibers
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TLDR
Interfacial properties of native β-lactoglobulin monomers and their heat-induced fibers were investigated at pH 2, through surface tension measurements at water-air and water-oil interfaces and interfacial shear rheology at the water- oil interface, showing the formation of a highly elastic interface.Abstract:
Interfacial properties of native β-lactoglobulin monomers and their heat-induced fibers, of two different lengths, were investigated at pH 2, through surface tension measurements at water-air and water-oil interfaces and interfacial shear rheology at the water-oil interface. The applied heat treatment generates a mixed system of fibers with unconverted monomers and hydrolyzed peptides. The surface tension of this system at the water-air interface decreased more rapidly than the surface tension of native monomers, especially at short times (10(-3) to 10(2) s). This behavior was not observed when the unconverted monomers and peptides were removed by dialysis. At the water-oil interface, the adsorption kinetics was much faster than at the water-air interface, with a plateau interfacial pressure value reached after 1 h of adsorption. For all the systems, interfacial shear rheology showed the formation of a highly elastic interface, with solid-like behavior at 1-10(3) s time scales. The highest modulus was observed for the long fibers and the lowest for the native monomers. Creep-compliance curves in the linear regime could be reduced to a single master curve, showing similar spectra of relaxation times for all investigated systems. Upon large deformations, the interfaces formed with long fibers showed the most rigid and fragile behavior. This rigidity was even more pronounced in the presence of unconverted monomers.read more
Citations
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References
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TL;DR: In this paper, the authors compare the behavior observed in systems containing either particles or surfactant molecules in the areas of adsorption to interfaces, partitioning between phases and solid-stabilised emulsions and foams.
Journal ArticleDOI
Understanding amyloid aggregation by statistical analysis of atomic force microscopy images
Jozef Adamcik,Jin-Mi Jung,Jérôme Flakowski,Paolo De Los Rios,Giovanni Dietler,Raffaele Mezzenga +5 more
TL;DR: It is shown that different stages of amyloid aggregation can be examined by performing a statistical polymer physics analysis of single-molecule atomic force microscopy images of heat-denatured beta-lactoglobulin fibrils.
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TL;DR: Novel colloidosome microcapsules with aqueous gel cores and integral shells of rodlike polymeric particles have been prepared and characterized and may find applications as vehicles for delivery and controlled release of drugs, cosmetics, and food supplements.
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