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  • Articles  (7)
  • viscosity  (4)
  • adsorption  (3)
  • Springer  (7)
  • American Association for the Advancement of Science (AAAS)
  • 2005-2009
  • 1985-1989  (7)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (7)
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  • Articles  (7)
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Keywords
Publisher
  • Springer  (7)
  • American Association for the Advancement of Science (AAAS)
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Year
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  • 1
    Electronic Resource
    Electronic Resource
    An adsorption effect on the gel strength of dilute gelatin-stabilized oil-in-water emulsions (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 933-934 
    Details
    ISSN: 1435-1536
    Keywords: Gelatin ; emulsion ; gel ; shear modulus ; adsorption
    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 incorporation of emulsion oil droplets into a gelatin gel leads to an initial increase in shear modulus at 25 °C for a gelatin concentration of 8 wt % but an initialdecrease for a concentration of 5 wt %. The latter result is consistent with a net lowering of the gelatin concentration available for gelation in the aqueous phase due to adsorption at the oil-water interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01469632
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  • 2
    Electronic Resource
    Electronic Resource
    Water/ionic surfactant/alkanol/hydrocarbon systems. Realms-of-existence and transport properties of microemulsion type media (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 767-770 
    Details
    ISSN: 1435-1536
    Keywords: Microemulsion(s) ; phase diagram(s) ; viscosity ; electrical conductivity ; water ; sodium dodecylsulfate ; straight alkanol(s) ; branched alkanol(s) ; aliphatic hydrocarbon(s) ; aromatic hydrocarbon(s)
    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 From a thorough study of many systems incorporating water, the ionic surfactant sodium dodecylsulfate, straighter or branched alkanols and aliphatic or aromatic hydrocarbons, it clearly appears that the molecular structure of the alkanol used as the cosurfactant is the composition factor that primarily determines the configuration of the microemulsion domain and, correlatively, the type of the microemulsion electroconductive and viscous behavior.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422860
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  • 3
    Electronic Resource
    Electronic Resource
    An investigation of aging aqueous poly(vinyl alcohol) solutions by the light scattering method (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 978-981 
    Details
    ISSN: 1435-1536
    Keywords: Poly(vinyl alcohol) ; aging ; light scattering ; exclusionchromatography ; viscosity
    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 Aqueous poly(vinyl alcohol) solutions of various concentrations were investigated. The aged solutions were diluted and then analyzed by the light scattering method, size exclusion chromatography, and viscometry. It was found that a relatively small quantity of supermolecular formations arise during aging; they are dispersed in the molecular solution of the predominant part of the polymeric material present. The amount of these aggregated structures and their formation rate increase with concentration of the aging solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412400
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of protein content on the surface activity and viscosity of emulsan (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 442-447 
    Details
    ISSN: 1435-1536
    Keywords: Emulsion ; emulsifier ; lipopolysaccharide ; protein ; surface activity ; viscosity
    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 Emulsan, produced byAcinetobacter calcoaceticus RAG-1, consists of a lipoheteropolysaccharide-protein complex. The amount of protein in the complex depends on the purification procedure. Maximum hexadecane-in-water emulsifying activity of emulsan was obtained with preparations containing 8–16 % protein. Neither deproteinized preparations (apoemulsan) nor protein-rich preparations emulsified hexadecane-in-water; however, mixtures of these preparations (containing 10–15 % total protein) were potent emulsifiers. Emulsifying activity was also obtained with a mixture of apoemulsan and polysaccharide-free emulsan protein. The stimulatory role of protein in the activity of emulsan was also demonstrated by pronase treatment of the complex. The presence of protein in the complex was important for lowering interfacial tension between hexadecane and water. Apoemulsan solutions showedγ i values of 30 mN/m whereas, emulsan containing more than 6% protein showed values of 13–15 mN/m. Viscosity studies showed that: (i) The higher the protein content in the complex, the lower its intrinsic viscosity, indicating that association of protein with the polysaccharide backbone results in less extended conformation; (ii) the complex appears to be stable between 30 ° and 80 °C; and (iii) mixtures of apoemulsan and emulsan had intrinsic viscosities close to the value predicted from addition of the weight-fraction contribution of the individual components. The synergistic emulsifying activity of emulsan mixtures is explained in terms of surface tension lowering by the protein component and formation of stable interfacial films by the high molecular weight polysaccharide component.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01412223
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of the interaction between gelatin and a spread monolayer of octadecanoic acid (1985)
    Springer
    Colloid & polymer science 263 (1985), S. 778-781 
    Details
    ISSN: 1435-1536
    Keywords: Gelatin ; ionic surfactants ; adsorption ; surface rheology ; octadecanoic acid
    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 Surface rheological measurements of octandecanoic acid monolayers spread on gelatin solutions were performed. The interaction of the spread monolayer with the gelatin involves a strong rise of the solidity of the surface structure with distinct viscoelastic properties and is comparable with the experimental findings looking into the interaction between gelatin and an ionic surfactant. The results found by the addition of sodium-dodecylsulfate to the gelatin solution are discussed, assuming the formation of a multilayer consisting of octadecanoic acid molecules interacting to a negligible degree with the gelatin-surfactant complexes displaced from the surface. The surface rheological parameters are influenced by both layers in opposition to the dynamic behaviour at compression and dilation described in the first part of this paper. An analogous effect is found if the cationic hexadecyltrimethylammoniurn-bromide is added to the gelatin solution. The influence of CTAB is interpreted as the consequence of a steric hindrance, caused by the concentration of groups with opposite charges on the small polar ranges of the gelatin molecules. As a particular interaction of octadecanoic acid with the complexes is possible, a mixed adsorption layer is formed and the high solidity of the surface layer is prevented by the presence of molecules not interacting with the complexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01422862
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  • 6
    Electronic Resource
    Electronic Resource
    Water self-diffusion in micellar solutions and in lyotropic mesophases of the system water/Triton TX-100 (1989)
    Springer
    Colloid & polymer science 267 (1989), S. 86-91 
    Details
    ISSN: 1435-1536
    Keywords: PFG-NMR ; self-diffusion ; micelles ; lyotropicmesophases ; hydration ; viscosity
    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 Studies by Pulsed Field Gradient NMR (PFG-NMR) methods and other physico-chemical experiments have been used to clarify the processes connected with water self-diffusion in mixtures formed by water and Triton TX-100. In micellar solutions the solvent diffusive trend is related to micelle hydration and, to a much less extent, to micelle size and shape. Hydration numbers from PFG-NMR are close to those obtained by viscosity experiments. In solution phases of the reversed kind, water in oil, water self-diffusion data suggest that aqueous domains are large and bicontinuous. Water self-diffusion in the hexagonal lyotropic mesophase has been interpreted by introducing a geometrydependent contraint, $$\tilde f$$ , termed “structural factor“, which is related to the parameters of the phase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01410153
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  • 7
    Electronic Resource
    Electronic Resource
    Polyacrylamide Na-kaolinite interactions: Effect of electrolyte concentration on polymer adsorption (1987)
    Springer
    Colloid & polymer science 265 (1987), S. 889-896 
    Details
    ISSN: 1435-1536
    Keywords: Polyacrylamide ; kaolinite ; clay-polymercomplex ; adsorption
    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 variation in polyacrylamide adsorption on Na-kaolinite as a function of the electrolyte concentration of the clay suspension, was determined under three pH conditions, where the clays display varying charge characteristics. Interpretation of the results is based on two arguments: non-charged polyacrylamide adsorption is restricted to the edge faces of the colloidal platelets and hydrogen bonding between the amide groups of the polymer and the “isolated” hydroxyl sites of these faces is the mode of surface attachment. At constant pH, when Na-kaolinite bears charged surface groups, the polymer adsorption, which is related to the density of the anchoring sites, parallels the state of ionization of the edge surface. The mechanism by which the salt modifies the adsorption properties of the kaolinite in neutral medium is not established with certainty. Nevertheless, no polymer-clay association occurs if the surface is entirely uncharged. This result is in line with the fact that while hydroxyl groups are engaged in internal hydrogen bonds, they cannot hydrogen-bond to the polyacrylamide. Variations in the clay-polymer affinity are attributed to a modification of the interfacial structure of the adsorbed polymer, associated with changes in the surface density of the anchoring groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01421817
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