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  • 1
    Electronic Resource
    Electronic Resource
    Influence of hazelnut oil phospholipids on the skin moisturizing effect of a cosmetic emulsion (1990)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of cosmetic science 12 (1990), S. 0 
    Details
    ISSN: 1468-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Previous studies have shown significant differences between the moisturizing effects and skin tolerances of virgin and refined vegetable oils when incorporated in cosmetic emulsions. They have also shown significantly greater and longer lasting moisturizing potential for a cosmetic emulsion containing virgin vegetable oils when compared with refined oils in the same emulsion. Results were obtained with sweet almond and hazelnut oils. Hazelnut oil has now been analysed to show the effect of refining. The phospholipid content of the oil decreased from 286 ppm in virgin oil to traces in refined oil.These oils were added at 10% to a cosmetic emulsion applied twice a day for 28 days to the skin of 56 volunteers and the changes in moisturizing effect measured by means of the capacitance method (corneometer CM 240 Khazaka). Measurements were made under conditions of controlled temperature and humidity on the first day of application and repeated after 21 and 28 days of treatment. A significant increase in the moisturizing effect of the emulsion containing virgin hazelnut oil was found and this was itself significantly greater than the emulsion containing refined oil. Both emulsions had a greater moisturizing effect when compared with the control emulsion and the untreated skin.Phospholipids were isolated by dialysis from virgin oil and added to the refined oil (234 ppm). The moisturizing effect obtained with the emulsion containing the enriched refined oil was shown to be the same as that obtained with the virgin oil emulsion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-2494.1990.tb00539.x
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  • 2
    Electronic Resource
    Electronic Resource
    Monoclonal Antibodies Allow Precipitation of Esterasic but Not Peptidasic Activities Associated with Butyrylcholinesterase (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 55 (1990), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: Commercially available and affinity-purified bu-tyrylcholinesterases isolated from human serum were examined for their esterasic activity and their ability to hydrolyze various neuropeptides, including neurotensin, substance P, and leucine-enkephalin. The three pools that displayed the lowest esterasic activities were shown to hydrolyze neurotensin with the same HPLC degradative pattern. By contrast, noticeable qualitative and quantitative discrepancies were observed when hydrolyses of substance P and leucineenkephalin by these three butyrylcholinesterase pools were studied. The pool that exhibited the highest esterasic activity appeared to be homogeneously constituted by 90- and 180-kDa protein bands by sodium dodecyl sulfate-polyacrylamide gel electrophoresis analysis and was totally unable to hydrolyze these three neuropeptides. This suggested that the three other butyrylcholinesterase preparations could be contaminated by exogenous peptidases. This was confirmed by means of three distinct monoclonal antibodies directed toward human serum butyrylcholinesterase. The three IgG-purified fractions precipitated the esterasic activity, whereas they failed to precipitate the neuropeptide-hydrolyzing activities whatever the substrate examined. Altogether, these results demonstrate that peptidases associated with butyrylcholinesterase are contaminating enzymes that cannot be considered as intrinsic activities of this enzyme.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1990.tb04555.x
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  • 3
    Electronic Resource
    Electronic Resource
    Stereospecific synthesis, assignment of absolute configuration, and biological activity of the enantiomers of 3-[[[3-[2-(7-chloroquinolin-2-yl)-(E)-ethenyl]phenyl][[3-(dimethylamino)-3-oxopropyl]thio]methyl]thio]propionic acid, a potent and specific leukotriene D4 receptor antagonist (1990)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 33 (1990), S. 2841-2845 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00172a025
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  • 4
    Electronic Resource
    Electronic Resource
    Ethylene-styrene thermoplastic copolymers prepared with supported Ziegler-Natta catalysts (1993)
    New York, NY : Wiley-Blackwell
    Polymers for Advanced Technologies 4 (1993), S. 435-438 
    Details
    ISSN: 1042-7147
    Keywords: Ziegler-Natta ; Catalyst ; Polymerization ; Ethylene ; Styrene ; Copolymers ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The magnesium chloride supported Ziegler-Natta catalysts are able to copolymerize ethylene and styrene in conditions of high activity. Different parameters, including catalyst type, monomer ratio, temperature and Lewis bases, allow variation of the activity and reactivity ratio. The incorporation of styrene in the copolymer remains always rather limited in moles. The products obtained contain less than 20% styrene in weight, and seem very similar in structure to linear low-density polyethylenes (LLDPE) obtained with the same catalyst: the melting temperature is only about 5°C lower than that of pure polyethylene. The polymer can be fractionated by solvents in a similar manner to LLDPE, and contains a styrene-enriched fraction, but homopolystyrene production has never been observed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pat.1993.220040706
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