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  • 1
    Electronic Resource
    Electronic Resource
    Effect of surface charge on adsorption of bovine serum albumin 2. Interaction of protein molecules with an anionic monolayer, as studied by ellipsometry, radiotracer and surface tension measurements (1988)
    Springer
    Colloid & polymer science 266 (1988), S. 254-260 
    Details
    ISSN: 1435-1536
    Keywords: Ellipsometry ; radio tracer ; bovine serum albumin ; protein adsorption ; anionicmonolayer ; desorption ofmonolayer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The adsorption of bovine serum albumin (BSA) onto an anionic monolayer of sodium docosylsulfate (SDocS) spread at the air/water interface was studied by ellipsometry. The adsorption behavior of BSA was estimated from the observed changes in phase differences and in the ratio of reflection coefficients. The dynamic process of BSA adsorption was measured after the injection of BSA solution into the aqueous substrate of SDocS monolayer. The gentle stirring of the substrate solution for 10 min was found to be enough to make the solution homogeneous without damaging the monolayer. The adsorption characteristics of BSA onto a negatively charged surface was compared with that onto a positively charged surface previously reported. The amount of adsorption depended on time and showed a maximum with an initial rapid rise, followed by gradual decrease toward the ultimate equilibrium value. The amount and time of the maximum adsorption depended on the concentration of BSA added to the aqueous substrate. Separate radiotracer measurement, using35S-labeled SDocS monolayer, which is insoluble by itself, revealed that SDocS is solubilized into the bulk solution when BSA is added to the aqueous substrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01452588
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of surface charge on adsorption of bovine serum albumin as studied by ellipsometry 1. Adsorption on cationic monolayer (1986)
    Springer
    Colloid & polymer science 264 (1986), S. 903-908 
    Details
    ISSN: 1435-1536
    Keywords: Ellipsometry ; bovine serum albumin ; protein adsorption ; cationic monolayer
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The adsorption of bovine serum albumin (BSA) onto a cationic monolayer (N,N-dimethyl-N,N-dialkylammonium chloride) spread at the air/water interface was studied by ellipsometry. Both thicknesses and refractive indices of the BSA layer adsorbed at the monolayer/solution interface are estimated from the observed change in phase difference and the ratio of reflection coefficients. The amount of adsorption of BSA resembles a Langmuir type isotherm. The adsorption changes with pH asymmetrically with respect to the pH of maximum adsorption, which was calculated to be 5.06 ± 0.47 mg/m2. The amount of maximum adsorption implies that the BSA molecule adsorbs to the surface in a mode intermediate between “side-on” and “end-on”.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410642
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stereochemical aspects of micellar properties of esterified glucoside surfactants in water: apparent molar volume, adiabatic compressibility, and aggregation number (2000)
    Springer
    Colloid & polymer science 278 (2000), S. 576-580 
    Details
    ISSN: 1435-1536
    Keywords: Key words Sugar surfactant ; Anomerism ; Micelle ; Compressibility ; Static light scattering
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract  The apparent molar volume and the apparent molar adiabatic compressibility of the sugar-based surfactants methyl 6-O-octanoyl-α-d-glucopyranoside (α-MOnG), methyl 6-O-octanoyl-β-d-glucopyranoside (β-MOnG), and octyl β-d-glucoside were measured over a wide concentration range. Also, the aggregation number of their micelles was determined from the Debye plot using static light scattering data. It was found that the micellar aggregation number for α-MOnG is 179 at 35 °C, which is 1.5 times larger than that for β-MOnG, suggesting that the anomerism of the head group influences the packing of the monomers during micelle formation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050558
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Micellar growth in dilute solutions of cesium perfluorooctanoate studied by small-angle X-ray and neutron scattering (1997)
    Springer
    Colloid & polymer science 106 (1997), S. 61-63 
    Details
    ISSN: 1435-1536
    Keywords: Micelle ; small-angle scattering ; fluorinated surfactant ; disk-like micelle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Small-angle X-ray and neutron scattering (SAXS and SANS, respectively) have been measured in H2O solutions of cesium perfluorooctanoate (CsPFO) in the concentration range 65–500 mM (below the phase boundary between micellar and discotic nematic phases). The data have been analyzed with a double-layered ellipsoid form factor combined with the rescaled mean-spherical approximation for the intermicellar structure factor. The scattering curves in the lower-concentration range are fitted well with oblate ellipsoid rather than prolate ellipsoid. Both the aggregation number and the degree of counterion binding increase with increasing surfactant concentration, which is consistent with the concentration dependences of the133Cs and19F NMR chemical shifts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01189492
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    Paper (German National Licenses)
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