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  • 1
    Electronic Resource
    Electronic Resource
    The influence of ascorbic acid on the rheological properties of the microemulsion region of the SDS/pentanol/water system (2005)
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 27 (2005), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The rheological properties of the microemulsion region of the SDS, pentanol, and water micellar system have been studied experimentally. The W/O and O/W microemulsions behave as typical Newtonian fluids: viscosity remains constant independent of the shear rate. For the bicontinuous system the shear-thinning effect is observed. The addition of ascorbic acid to the system caused a microemulsion viscosity increase, which was the highest in the bicontinuous region and at the lowest temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.2005.00290_4.x
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of atmospheric oxidation of propyl gallate in an anionic surfactant system in the absence and presence of ascorbic acid (2004)
    Oxford, UK : Blackwell Science Ltd
    International journal of cosmetic science 26 (2004), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The antioxidant efficiency of two hydrophilic species, ascorbic acid (AA) and propyl gallate (PG), in an anionic surfactant system are studied. AA and PG are dissolved/solubilized in a microemulsion formed by water, pentanol, and sodium dodecyl sulfate. The determination of PG decomposition/oxidation kinetics shows enhanced oxidation of PG with increasing pentanol concentration in the system. When AA and PG are both present in water, in surfactant aqueous solution, and in the studied microemulsion systems, the molecular complex AA–PG is formed. After some time the complex decomposes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.2004.00233_4.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Vapour pressure of a fragrance ingredient during evaporation in a simple emulsion (1997)
    Oxford, UK : Chapman and Hall
    International journal of cosmetic science 19 (1997), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The phase diagram water, phenethyl alcohol and laureth 4 was determined and the variation of the vapour pressure of the alcohol was determined during evaporation using gas chromatographic head-space analysis. The phase changes during evaporation were estimated from the phase diagram and compared to the appearance of the emulsion using optical microscopy. The transfer of the fragrance ingredient between different phases during the process was estimated and its measured vapour pressures compared to those calculated from values of earlier determination in different phases in the system. The agreement was good. On a elabore le diagramme de phase eau, alcool phenethylique et laureth 4 et on a determine la variation de la tension de vapeur de l'alcool durant l'evaporation en utilisant l'analyse par chromatographie gazeuse a injection directe en tete de colonne. Les changements de phase durant l'evaporation sont estimes a partir du diagramme de phase et compares a l'aspect de l'emulsion par microscopie optique. On a estime le transfert de l'ingredient parfume entre les differentes phases durant le processus et ses tensions de vapeur mesurees ont ete comparees a celles calculees a partir de valeurs determinees anterieurement dans differentes phases du systeme. La concordance est satisfaisante.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1997.tb00190.x
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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