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  • 1
    Electronic Resource
    Electronic Resource
    LIGHT SCATTERING STUDY OF SOLVENT EFFECT ON MICELLE FORMATION OF AEROSOL OT1 (1962)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 66 (1962), S. 363-365 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100808a510
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  • 2
    Electronic Resource
    Electronic Resource
    Liquid crystals composed of N-acylamino acids. I. Circular dichroism and selective light transmission in cholesteric liquid crystals composed of N-acylamino acids and organic solvents (1978)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 100 (1978), S. 6898-6902 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00490a019
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  • 3
    Electronic Resource
    Electronic Resource
    Enantiomorphism in the Helical Aggregate of Lithium 12-Hydroxystearate (1965)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 87 (1965), S. 3015-3016 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01091a046
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  • 4
    Electronic Resource
    Electronic Resource
    New type of twisted mesophase in jellies and solid films of chiral 12-hydroxyoctadecanoic acid (1979)
    [s.l.] : Nature Publishing Group
    Nature 278 (1979), S. 578-579 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Crystalline samples of 12HOA were prepared as described previously2. Solutions of chiral 12HOA in CC14 set to an almost transparent jelly above 13 mmol I"1 at 20 C, while solutions of racemic 12HOA showed no gelation until they deposited crystals from a saturated solution. The thin preparations of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/278578a0
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  • 5
    Electronic Resource
    Electronic Resource
    Electron Microscopic Observation of Monolayers of Synthetic Linear Polymer (1955)
    [s.l.] : Nature Publishing Group
    Nature 176 (1955), S. 1117-1119 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A sample of 6-nylon (poly-e-capramide, D.P.153) was spread from its mixed solution in benzene-phenol (3/1 v/v) on the surface of distilled water in a Langmuir trough. The uncompressed and compressed films were transferred to a collodionsupport by using a lifted film technique2 for building up films ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1761117b0
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  • 6
    Electronic Resource
    Electronic Resource
    Enantiomorphism in the super helices of poly-γ-benzyl-glutamate (1967)
    Springer
    Colloid & polymer science 219 (1967), S. 40-42 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wurden Aggregate von Poly-γ-benzyl-d (oderl)-glutamat durch Mischung von deren Lösung in Dimethylformamid oder Dioxan mit Propionsäure ausgefällt. Die elektronenmikroskopischen Bilder zeigen, daß die Aggregate aus gut ausgebildeten Helixfibrillen bestehen. Der Drehsinn der Helix war rechtsläufig für dasd-Isomer und linksläufig für dasl-Isomer. Eine enantiomorphe Beziehung läßt sich für die Helix-Aggregate zu den optisch aktiven Strukturen der Makromoleküle zeigen. Zwei kürzliche Veröffentlichungen ergaben zu dem hier Festgestellten widersprüchliche Ergebnisse über den Schraubensinn der Helices der aggregate. Dies scheint der Sorglosigkeit bei der Bestimmung des Schraubensinns von elektronenmikroskopischen Bildern zuzuschreiben zu sein.
    Notes: Summary Aggregates of poly-γ-benzyl-d (orl-glutamate were precipitated by mixing of its solution in dimethylformamide or dioxane with propionic acid. Electron micrographs showed that the aggregates were composed of well-developed helical fibrils. The sence of helix was right-handed for thed-isomer and left-handed for thel-isomer; an enantiomorphic relation was shown for the helical aggregate of optical active macromolecule. Two recent publications have given conflicting results for the helical sense of the aggregate. This seems to be ascribed to carelessness in determining the helical sense from the electron micrographs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02086093
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  • 7
    Electronic Resource
    Electronic Resource
    Induced circular dichroism of achiral dye solubilizates in aqueous micellar solutions of a chiral surfactant (1976)
    Springer
    Naturwissenschaften 63 (1976), S. 532-533 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00596856
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  • 8
    Electronic Resource
    Electronic Resource
    The gelation of high polymers at the air-water interface (1959)
    Springer
    Colloid & polymer science 167 (1959), S. 141-144 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Die synthetischen Hochpolymeren wurden als monomolekulare Filme in der Grenzfläche Luft-Wasser gespreitet und mit Hilfe des Oberflächenrheometers konstanten Schubspannungen unterworfen. Die Typen der dabei enthaltenen Spannungs-Zeit-Kurven waren charakteristisch für die verschiedenen Filme und Filmzustände und lassen sich durch entsprechend gewählte mechanische Modelle darstellen. Hinsichtlich der Theologischen Eigenschaften ergab sich für sich eine Einteilung in 5 Gruppen. Die Gelfläche, d. h. die Fläche, für welche ein gegebener Film gerade beginnt, Viskoelastizität während der Kompression zu zeigen, ist spezifisch für jedes Material. Es ist festzustellen, daß Filme von kristallisierenden Hochpolymeren bei größeren Flächen gelieren, als der dichten Packung (Dichtflächen) entspricht.
    Notes: Summary Monolayers of various synthetic polymers were spread at the air-water interface and they were subjected to a constant shear stress by means of a surface rheometer. The types of the strain time curve thus obtained were peculiar to a given film and represented by the corresponding mechanical model. From the rheological characteristics of films, they were arranged into five groups. The gelation area, i. e. the smallest area at which films begin to aquire any viscoelasticity during compression, was also specific to a given film. It was found that films of crystalline polymer gelify at an area larger than close-packed area. The force-area curves of polymer films were discussed from the rheological standpoint.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01809632
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of ripple on monolayers of high polymers (1960)
    Springer
    Colloid & polymer science 171 (1960), S. 15-20 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Wenn in Oberflächenfilmen von Hochpolymeren auf Wasser Kräuselung erzeugt wird, sinken der Oberflächendruck, das Oberflächenpotential und die Oberflächenelastizität unmittelbar nach dem Aufhören der Kräuselung ab. Wenn die Filme anschließend in Ruhe gelassen werden, stellen sich die alten Werte allmählich wieder ein. Dieses Phänomen ist nicht auf Re-adsorption von Makromolekeln, die durch die Wellenerregung der Wasserfläche in das Innere des Wassers übergegangen sind, zurückzuführen, sondern sie ist eine zweidimensionale Gel-Sol-Gel-Umwandlung, die durch die Einwirkung der Oberflächenwellen und die folgende Ruhe hervorgerufen wird.
    Notes: Summary It was found that surface films of high polymers on which ripple was produced reduce the surface pressure, surface potential and surface elasticity immediately after the cease of ripple, and recover gradually their original value by subsequent rest. This phenomenon was attributed not to the re-adsorption of film molecules displaced from surface phase into substrate water by wave motion of water, but to a two dimensional gel/ sol/gel transformation induced by ripple and subsequent rest (surface thixotropy).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01520318
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  • 10
    Electronic Resource
    Electronic Resource
    A methode for preparing an aqueous colloidal dispersion of organic materials by using water-soluble polymers: Dispersion ofΒ-carotene by polyvinylpyrrolidone (1965)
    Springer
    Colloid & polymer science 203 (1965), S. 130-133 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zusammenfassung Es wird eine neue Methode zur PrÄparation einer wÄ\rigen Kolloid-Dispersion vonΒ-Carotin beschrieben. Diese Methode besteht aus Herstellen einer festen Mischung ausΒ-Carotin und Polyvinylpyrrolidon (PVP) aus der Chloroformlösung durch Verdampfen des Lösungsmittels und anschlie\ende Lösung der Mischung in Wasser. Aus Filtration und elektronenmikroskopischen Aufnahmen lÄ\t sich zeigen, da\ dasΒ-Carotin molekulardispers im festen PVP verteilt ist. Das PVP wirkt offensichtlich als festes Lösungsmittel fürΒ-Carotin und gleichzeitig als stabilisiertes Agens für die wÄ\rige Dispersion. Anstelle von PVP können auch derartige hydrophile-oleophile Substanzen wie Methylcellulose, PolyvinylmethylÄther oder Aerosol OT verwendet werden. Es können auch andere Materialien alsΒ-Carotin auf gleiche Weise dispergiert werden.
    Notes: Summary A new method was developed for preparing an aqueous colloidal dispersion ofΒ-carotene. This method consists of preparing a solid mixture ofΒ-carotene and polyvinylpyrrolidone (PVP) from their chloroform solution by evaporating the solvent and dissolving the mixture into water. From filtration experiment and electron microscopic observation it was found thatΒ-carotene in its aqueous dispersion exists as colloidal particles with a diameter of about 100 å. Spectroscopic data evidenced thatΒ-carotene is molecularly dispersed in solid of PVP. It was considered that PVP acts as a solid solvent forΒ-carotene and, at the same time, a stabilizing agent for its aqueous dispersion. Instead of PVP, such a hydrophilic-oleophilic substance as methylcellulose, polyvinylmethylether or Aerosol OT could be also used as the dispersing agent. Other materials thanΒ-carotene could be dispersed by similar technique.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01507758
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