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  • microemulsions  (2)
  • Cyg X-2  (1)
  • Highly concentrated emulsions  (1)
  • Liquid crystals  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Advances in Space Research 3 (1984), S. 67-70 
    ISSN: 0273-1177
    Keywords: Cyg X-2 ; X-ray source ; accreting neutron star ; comptonization
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 271 (1993), S. 997-1004 
    ISSN: 1435-1536
    Keywords: HLB temperature ; three-phase behavior ; microemulsions ; PIT
    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 effect of monodisperse solubilities of each surfactant in an excess oil phase on the three-phase behavior was investigated in a water/octaethyleneglycol dodecyl ether (R12EO8)/tetraethyleneglycol dodecyl ether (R12EO4)/heptane system. The mid temperature of the three-phase region is defined as the HLB temperature. The HLB temperature is largely skewed to higher temperature in a dilute region due to the difference in the distribution of each surfactant between excess oil and microemulsion (surfactant) phases forming the three-phase body. Taking account of the monodisperse solubilities, the equation for the HLB temperature was obtained on the basis of geometrical calculation of a particular three-phase triangle. The equation well describes the three-phase behavior for a mixed surfactant system in a space of compositions and temperature. In the mixed surfactant system, the monodisperse solubility of R12EO8 in oil phase forming a three-phase body is monotonously increased with the rise in temperature, whereas that of R12EO4 is first increased and then is decreased. Consequently, the sum of both solubilities does not change greatly in a wide range of temperature.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 105 (1997), S. 239-243 
    ISSN: 1435-1536
    Keywords: Highly concentrated emulsions ; HLB ; sucrose dodecanoate ; microemulsions ; phase behavior
    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 Conditions to produce highly concentrated emulsions or gel emulsions were investigated in water/sucrose dodecanoate/oil systems. HLB (Hydrophile-Lipophile Balance) of sucrose dodecanoate is changed by increasing the number of dodecane carboxylic groups attached to the sucrose ring. In order to know the correlation between the phase behavior and the formation of highly concentrated emulsions, the phase diagram of the water/mixed sucrose dodecanoate/decane system was constructed. In the sucrose monododecanoate system, the surfactant is mainly dissolved in water and forms micelles. With the increase in lipophilic chains, the sucrose surfactant tends to form reverse micelles in oil via microemulsions and lamellar liquid crystal. The formation of O/W-type and W/O-type highly concentrated emulsions is related to this phase behavior. The formation of W/O-type emulsions is enhanced upon addition of monolaurin.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 278 (2000), S. 899-904 
    ISSN: 1435-1536
    Keywords: Key words Polyglycerol fatty acid ester ; Small-angle X-ray scattering ; Liquid crystals
    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 effect of the chain length distribution on the phase behavior, the structure of liquid crystals, and physicochemical properties was investigated in water/ polyglycerol fatty acid ester. Polyglycerol fatty acid esters with sharply distributed polyglycerol (10G*0.7L) and with broadly distributed polyglycerol (10G0.7L) were used. Unreacted polyglycerol in both surfactants was removed. 10G*0.7L forms hexagonal liquid crystals at a higher concentration than 10G0.7L. The effective cross-sectional area of the lipophilic parts in the hexagonal phase of 10G0.7L is smaller than that of 10G*0.7L owing to the difference in the chain length distribution. Evidently, 10G0.7L molecules are tightly packed in aggregates; therefore, 10G0.7L decreased the surface tension more strongly and promoted emulsification.
    Type of Medium: Electronic Resource
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