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  • Wiley-Blackwell  (166)
  • Nature Publishing Group  (40)
  • Oxford University Press  (9)
  • 1975-1979  (136)
  • 1960-1964  (79)
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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 323 (1963), S. 57-64 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The degree of electric charging of metal surfaces due to retarding of neutral metallic and semiconducting particles having various velocities has been determined. The effects are supposed to result from the exo-emission of electrons the amount of which depends on the velocities, masses, and impact angles of the particles.From the strong differences between the reactivities of solid substances during and after mechanical working it is concluded that the observed exo-emission is caused by exitation states at submicroscopic surface points.
    Notes: Die elektrische Aufladung von Metalloberflächen bei der Impuls-Bremsung nicht geladener, fliegender, metallischer und halbleitender Partikel verschiedener Geschwindigkeiten wird gemessen. Die beobachteten Erscheinungen lassen sich aus der Exo-Emission von Elektronen herleiten. Diese ergibt sich u. a. aus dem Zusammenhange zwischen der Elektronen-Austrittsarbeit der beteiligten Partner und der Größe der gebremsten Impulse. Die Ladungs-Übergänge hängen Übersichtlich vom Quadrat der Geschwindigkeiten, von der Masse und vom Auftreffwinkel der Körner ab. Einflüsse mechanischer Vorbehandlung der Festkörper, entsprechend früheren Beobachtungen, werden bestätigt.Im Zusammenhange mit den beobachteten großen Unterschieden des Reaktionsvermögens von Festkörpern während der Bearbeitung und nach ihrem Abschluß lassen die beobachteten Exo-Emissionen auf das Auftreten erhöhter Anregungszustände an submikroskopischen Orten während der Impuls-Bremsung schließen.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 199 (1963), S. 167-168 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] So far we had observed no X-ray spikes in any synthetic diamond examined. Through the kindness of Drs. R. H. Wentorf and H. M. Strong of the General Electric Co., Schenectady, we have now had the opportunity of examining very small synthetic diamonds which have been doped with boron, aluminium and ...
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 197 (1963), S. 1094-1095 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] One approach towards greater generality is that which has been discussed by Willmore, Scheidegger and Bancroft1'2 from which the postulate of plane stratification is eliminated. Instead of this, it is assumed that there is a surface in the ground below which the travel-time is a function of ...
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  • 4
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 901-902 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the investigation reported here we attempted to determine whether the adult human optic nerve contains an antigen common to the brain, cerebellum and spinal cord. Since the brain antigen which causes experimental allergic encephalomyelitis is tissue and not species specific4, we felt justified ...
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  • 5
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 196 (1962), S. 598-598 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The bottle of yeast retained the original label, which read in part : 'Rising-up Yeast', 'Dauerhefe', and 'Levure Inalterable'. The remaining portion of the label was illegible. A wax seal covering the cork stopper was intact. The bottle of yeast was shipped under refrigeration along with other ...
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 195 (1962), S. 1209-1209 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The test animals used were pregnant albino rats of the Sprague-Dawley strain, weighing 150-200 g. Fifty-one animals were given amino-nucleoside for periods of 7 days, beginning on the fifth to fourteenth day of gestation. Each course of treatment consisted of daily subcutaneous injections of 0-3 ...
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 186 (1960), S. 801-803 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In the course of a series of investigations on unstable low-temperature deposits we have chosen the sulphur system as a model. A summary of our results follows3. Each apparatus consisted of four units in series: (1) sulphur reservoir with large liquid surface at temperature vs C.; (2) heated ...
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  • 8
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 766-767 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] One of our major interests has been to produce superconducting niobium films with the transition characteristics of the pure bulk metal. It is a well-known fact that superconducting niobium films are difficult to prepare. The main obstacles to be overcome are: high melting temperature, low vapour ...
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  • 9
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] DIHYDROFOLIC reductase. which catalyses reaction (1): dihydrofolate + reduced triphosphopyridine micleotide (TPNH) + H+ ^ tetrahydrofolate TPN+ (1) and to a smaller extent the reduction of folic acid to dihydrofolic acid, has been detected in leucocytes from patients with acute leukaemia and ...
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  • 10
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 193 (1962), S. 941-942 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] CHROMATOGRAPHY on adsorbent-coated glass strips or plates is frequently used as a qualitative analytical method. We have modified the techniques described by Kirchner1 and Stahl2 to make it applicable for preparative purposes. The method compares favourably with column chromatography in many ...
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