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  • 1
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 1 (1946), S. 266-274 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: By embedding submicroscopic silver rodlets in micellar systems with fibrous structures, unexpectedly strongly anisotropic rodlet compounds bodies are formed. The observed dichroism, indigo blue-straw yellow, suggests the possibility that a particular anisotropic modification of silver is being dealt with, instead of cubic silver. On applying Wiener's compound body formulas, it appears, however, that in the short-wave region the observed anisotropic effects (negative rodlet double refraction and dichroism) can be computed from the optical properties of isotropic silver. In the spectral region of the average and long waves, differences are found between the observed anisotropy and the value calculated by means of Wiener's formulas. These differences are, however, not of such a nature that it is necessary to assume an unknown allotropic modification of silver with particular optically anisotropic properties in order to explain them.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 1 (1946), S. 172-174 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In the following paper the crystallization of submicroscopic cellular strands from multimolecular, cellulose films is illustrated by electron micrographs.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 2 (1947), S. 314-317 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: It is shown that molecules of benzidine dyes can diffuse into cellulose fibers only perpendicular, not parallel, to the fiber axis.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 44 (1961), S. 173-178 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The layers of potato starch grains as seen in the light microscope can be resolved into much finer submicroscopic lamellae which evidently represent the real growth rings of these spheroids.
    Notes: Die lichtmikroskopisch sichtbaren Schichten der Kartoffelstärkekörner lassen sich in submikroskopische Feinstlamellen auflösen, die offenbar die eigentlichen Zuwachsringe dieser Sphärite vorstellen.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 6 (1951), S. 7-14 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The electron microscope shows, that natural fibers of cellulose consist of microfibrils with a diameter of approximately 250 Å. The section across such a microfibril contains about 20 micellar strands as revealed by the X-ray method. The mutual position of these strands and the type of fibril porosity caused hereby are discussed, with special reference to the chemical cross-sections obtained by hydrolysis of natural cellulose fibres.
    Notes: Die im Elektronenmikroskop entdeckten Mikrofibrillen nativer Cellulose enthalten auf dem Querschnitt etwa 20 Micellarstränge. Die gegenseitigen Lagebeziehungen dieser Stränge und die dadurch bedingte Lockerstruktur der Mikrofibrillen werden diskutiert unter besonderer Berücksichtigung des hydrolytischen Querzerfalls nativer Cellulosefasern.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 62 (1963), S. 25-30 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Comparable to cellulose of primary plant cell walls, bacterial cellulose of Acetobacter xylinum consists of elementary fibrils with a diameter of about 35 Å containing only around 36 chain molecules. These behave as rather brittle crystalline needles indicating high crystallinity due to a homogeneous chain lattice. Considered as antiparallel cellulose molecules, almost all chain pairs of the elementary fibril are situated in its surface. The hypothesis that pairs of antiparallel glucose residues can be added at the end of the microfibril only to its surface could explain the constancy and the unexpectedly small value of the diameter of the elementary fibrils.
    Notes: Die Bakteriencellulose von Acetobacter xylinum besteht wie die Cellulose der pflanzlichen Primärwände aus Elementarfibrillen, die mit 35 Å Durchmesser (Fig. 1, 2) nurmehr etwa 36 Kettenmoleküle enthalten (Fig. 3). Diese verhalten sich wie spröde Kristallnadeln, woraus auf ein homogenes Kettengitter geschlossen wird. Als antiparallele Cellulosemoleküle betrachtet, liegen praktisch alle Kettenpaare in der Oberfläche der Elementarfibrille (Fig. 4). Die Voraussetzung, daß Paare von antiparallelen Glukoseresten beim Anbau an die Enden der Fibrillen nur in der Oberfläche eingefügt würden, könnte die Konstanz und die Kleinheit des Durchmessers der Elementarfibrillen verständlich machen.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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