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  • Wiley-Blackwell  (219)
  • Nature Publishing Group  (165)
  • 2020-2024
  • 2000-2004  (8)
  • 1990-1994  (221)
  • 1965-1969  (138)
  • 1940-1944  (17)
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  • 1
    Digitale Medien
    Digitale Medien
    Kinetics of Low Temperature Oxidation of Coal and Char (1967)
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 280-280 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Recent work at the Coal Research Establishment on the rate of oxidation of biriderless char briquettes made from a low rank coal has shown that neither the Schmidt-Elder nor the Elovitch equation fitted the kinetics curves. The failure of the Elovitch equation is shown by the departure of the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/213280a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Numerical simulation of non-isothermal SMC (sheet molding compound) molding (1993)
    Brookfield, Conn. : Wiley-Blackwell
    Polymer Composites 14 (1993), S. 503-514 
    Details
    ISSN: 0272-8397
    Schlagwort(e): Chemistry ; Chemical Engineering
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Maschinenbau
    Notizen: Design of molding tools and molding cycles for sheet molding compounds (SMC) is often expensive and time consuming. Computer simulation of the compression molding process is a desirable approach for reducing actual experimental runs. The focus of this work is to develop a computer model that can simulate the most important features of SMC compression molding, including material flow, heat transfer, and curing. A control volume/finite element approach was used to obtain the pressure and velocity fields and to compute the flow progression during compression mold filling. The energy equation and a kinetic model were solved simultaneously for the temperature and conversion profiles differential scanning calorimetry (DSC) was used to experimentally measure the polymer zation kinetics. A rheometrics dynamic analyzer (RDA) was used to measure the rheological changes of the compound. A series of molding experiments was conducted to record the flow front location and material temperature. The results were compared to simulated flow front and temperature profiles.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pc.750140608
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Serologically Active Fucose-Containing Oligosaccharides Isolated from Human Blood-Group A and B Substances (1965)
    [s.l.] : Nature Publishing Group
    Nature 206 (1965), S. 594-597 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] INVESTIGATIONS on the inhibition of haemagglutination1 and precipitation2 with simple sugars, together with enzymatic degradation3 and inhibition4 experiments, strongly indicated that blood-group A and B specificities are associated, respectively, with the presence of non-reducing terminal residues ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/206594a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Mode of Enhancement of Self Stimulation in Rats by Methamphetamine (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 709-710 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Stein4 attempted to test these hypotheses of the central actions of the amphetamines using self stimulation in the rat. Small doses of amphetamines markedly enhanced low response rates. Because a-methyl tryptamine, a long acting "tryptamine receptor" stimulant, did not mimic this action, Stein ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/224709a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Lead Isotopes, Lunar Capture and Mantle Evolution (1969)
    [s.l.] : Nature Publishing Group
    Nature 224 (1969), S. 766-768 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Lead isotope data from young mantle derived volcanics suggest that the mantle is a two-stage system. The second stage was formed at the time of the global Anorthosite Event, and both events may have been caused by the capture of the Moon by the ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/224766a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Transformation of Pneumococcal Types (1944)
    [s.l.] : Nature Publishing Group
    Nature 153 (1944), S. 763-764 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] GRIFFITH1 was the first to show that an attenuated and non-encapsulated 'rough' (JB) variant of one specific type of Pneumococcus could be transformed into a virulent and encapsulated 'smooth' (S) form of another specific type. The transformation was accomplished in vivo by injecting subcutaneously ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/153763a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Cellulose Acetate Mounts for Rock and Mineral Fragments (1944)
    [s.l.] : Nature Publishing Group
    Nature 153 (1944), S. 226-226 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] EMBEDDING rock or mineral particles in a uniform thin sheet of cellulose acetate facilitates their optical examination, transport and storage, especially during the field study of graded concentrates derived from detrital or crushed rocks. More than a hundred times the* quantity of such ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/153226a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Ordering of Microcraters produced by a Laser on a Metal Surface (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 1058-1060 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] A single pulse creates a large number of microcraters (103-104). Two types can be distinguished: type A associated with the pure metal and type B associated with impure metals (see Fig. 1). Type B, which are larger and have a central throat, occur apparently at random over the surface at lower ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/2221058a0
    Standort Signatur Erwartet Verfügbarkeit
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    Artikel (Nationallizenzen)
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  • 9
    Digitale Medien
    Digitale Medien
    Surface Layer Fracture of Brittle Materials by Giant Laser Pulses (1969)
    [s.l.] : Nature Publishing Group
    Nature 222 (1969), S. 27-29 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] The surface layer fracture caused by giant laser pulses on refractory metal carbides is revealed by scanning electron ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/222027a0
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Experimental Verification at High Pressure of the Relationship between Compression, Density and Sonic Velocity (1969)
    [s.l.] : Nature Publishing Group
    Nature 221 (1969), S. 1047-1047 
    Details
    ISSN: 1476-4687
    Quelle: Nature Archives 1869 - 2009
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Notizen: [Auszug] Although the equation is often treated as if it were a thermodynamic relation, various writers, notably Richards1 and Rowlinson2, have pointed out that this is not so, but that it requires experimental verification, which is available for liquids at atmospheric pressure only. Because the equation ...
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1038/2211047a0
    Standort Signatur Erwartet Verfügbarkeit
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