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  • Articles  (10)
  • Wiley-Blackwell  (8)
  • Nature Publishing Group
  • 1970-1974  (10)
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  • Articles  (10)
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  • 1
    Electronic Resource
    Electronic Resource
    Tracing of RNA from a Puff in the Polytene Chromosomes to the Cytoplasm in Chironomus tentans Salivary Gland Cells (1973)
    [s.l.] : Nature Publishing Group
    Nature 242 (1973), S. 51-53 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 In situ hybridization by BR 2 RNA. Autoradiographs showing whole chromosome set (a) and chromosome IV (b) after hybridization by 1,000 c.p.m. of BR 2 RNA, isolated from in vitro labelled salivary glands. Roman numerals designate the four polytene chromosomes. Arrows indicate the nucleolar ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/242051a0
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  • 2
    Electronic Resource
    Electronic Resource
    Vascularization of Skin Grafts (1971)
    [s.l.] : Nature Publishing Group
    Nature 232 (1971), S. 279-280 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 Microangiograms demonstrating the extent of vasculari-zation of (a) a 3 day and (b) a 2 day old allograft. The appearance of the graft vasculature does not indicate its derivation from newly grown-in host capillaries. It is much more likely that the discrete vessels, seen to bridge the space ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/232279a0
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  • 3
    Electronic Resource
    Electronic Resource
    Crystallization kinetics of isotactic polystyrene from isotactic-atactic polystyrene blends (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 10 (1972), S. 1183-1191 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In an attempt to facilitate a better understanding of the role of noncrystallizable components on the crystallization kinetics, spherulitic growth rates as well as the morphology and melting behavior of isotactic polystyrene in blends with various molecular weight atactic polystyrenes (900 to 1,800,000) over a wide range of concentrations have been studied. The growth rates are uniformly depressed with increasing amounts of atactic diluent. In addition, they are dependent on the molecular weight of the added polystyrene, generally decreasing in the molecular weight ranges between 4800 and 19,800 and between 51,000 and 1,800,000. However, between these two ranges, anomalous growth rates showing a sudden increase are observed, which may be explained by an increase in the entrapment of the noncrystallizable diluent. An explanation based on morphological observations, which showed an increase in coarseness of the spherulites with increasing molecular weight of the added atactic polystyrene, is offered.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1972.160100701
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  • 4
    Electronic Resource
    Electronic Resource
    Abrasion resistance of pre-stressed and stressed rubber vulcanizates (1970)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 14 (1970), S. 11-15 
    Details
    ISSN: 0021-8995
    Keywords: 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 , Physics
    Notes: The abrasion resistance of carbon black-reinforced SBR-1500 vulcanizates has been shown to be drastically reduced by the application of tensile strain during the abrasion process. Pre-stressing of similar vulcanizates, however, has no effect upon the abrasion resistance.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1970.070140102
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  • 5
    Electronic Resource
    Electronic Resource
    Some Thermodynamic and Kinetic Aspects of Superficial TransitionsPaper presented to the meeting of the GDCh-Working Group „Applied Electrochemistry“ at Jülich (Germany) at October 13-15, 1971. (1972)
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 44 (1972), S. 219-220 
    Details
    ISSN: 0009-286X
    Keywords: Chemistry ; Industrial Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: According to the nature of the system, superficial transitions may involve one, two or three distinct particles. Since transition potentials are generally very accurately defined, they can be used to derive information about the various factors acting on adsorbability. The kinetic study of transition processes shows that their rate is controlled by the creation and expansion of nuclei. However, the kinetic parameters differ notably in function of the nature of the system and the amount of electrical energy required.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cite.330440424
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  • 6
    Electronic Resource
    Electronic Resource
    Evidence for ionic clusters in butadiene-methacrylic acid copolymers neutralized with various salts (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 12 (1974), S. 115-130 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Effects of neutralization on butadiene-methacrylic acid copolymers have been studied. In Hycar CTB with 2% acid groups, small-angle x-ray scattering gives evidence of some cation clustering and leads to a value of the mean radius of 5.6 Å for the clusters and a value of the distance between them of 70 Å. When the concentration of salt is increased there is no appreciable change in the distance between clusters or in their size, but their number increases. The structure of clusters has been studied by electron paramagnetic resonance in copolymers neutralized with copper salts. The appearance of a line as in the monohydrated acetate salt permits one to define the structure of clusters consisting of two Cu2+ and four RCOO- ions with two H2O or RCOOH molecules. When the temperature is increased, the signal corresponding to Cu2+-Cu2+ pairs disappears. In high molecular weight butadiene methacrylic acid copolymers with 9% acid groups, we have found the ion pair clusters gathered into larger clusters. In dynamic mechanical properties, a relaxation peak appears at 340°K. We interpret this as due to breaking and possible re-forming of dipolar associations.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.180120110
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  • 7
    Electronic Resource
    Electronic Resource
    Distortion analysis of severely flattened rings (1971)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 3 (1971), S. 389-403 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The NMR spectra of the nonaromatic protons in several benzo-substituted five- and six-membered rings have been analyzed at 60- and 90-MHz. The vicinal coupling constants from the—CH2—CH2—fragments give a quantitative assessment of the degree of ring flattening. The distortions are discussed in terms of the structural components of the molecules.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270030403
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  • 8
    Electronic Resource
    Electronic Resource
    Transmission of long-range coupling through three-membered rings: The cyclopropylcarbinyl σ-π coupling (1973)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 5 (1973), S. 403-406 
    Details
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Spin information should be passed most effectively from a carbon-hydrogen bond to the p-rich carbon-carbon bond of an adjacent cyclopropane ring when the two bonds are parallel. The existence of such a mechanism is tested in a series of spiro hydrocarbons and epoxides in which four-bond zigzag (W) couplings are absent. The structure is varied from the ideal parallel-orbital geometry of spirohexane and the homologous epoxide to the unfavorable staggered-orbital geometry of spiro[2·5]octane and its epoxide. In the parallel-orbital situation, a four-bond non-W coupling of about 0·2 Hz is found; this coupling is absent in the other geometric situations. The meager ability of the cyclopropyl bonds to pass spin information, when compared to the π-orbitals in alkenes, is discussed in terms of the electronic structure of cyclopropanes.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1270050903
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  • 9
    Electronic Resource
    Electronic Resource
    “Living” polytetrahydrofuran as initiator for cationic polymerizations (1970)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 133 (1970), S. 289-293 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1970.021330126
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  • 10
    Electronic Resource
    Electronic Resource
    Isolation and identification of oligomers formed during cationic polymerization of propylene sulfide (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-1: Polymer Chemistry 9 (1971), S. 3055-3058 
    Details
    ISSN: 0449-296X
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.150091024
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