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  • 1955-1959  (6)
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 1245-1246 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] GOLDSCHMIDT'S view that the interior of tbe V_J Earth resembles the hearth of a smelting furnace and that the Earth is zonal in its structure, with each zone characterized by certain dominant elements, has long prevailed in geochemistry. In recent years, however, these views have been critically ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cellular and molecular life sciences 14 (1958), S. 429-434 
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Auf Grund der Ergebnisse der modernen Elektronenchemie, der Quantenmechanik, der Ultra-Hochdruck-Thermodynamik und bis zu einem gewissen Grade der Seismologie wird eine neue Ansicht über die Struktur der Erde postuliert. Das Modell einer Kugel, die stufenweise mit Zunahme der Tiefe ihre Zusammensetzung ändert, erscheint wahrscheinlich. Die von den Seismologen beobachtete Zonierung beruht nicht auf drastischen Veränderungen der Zusammensetzung, sondern auf einer stetigen Degeneration der chemischen Eigenschaften der Atome, die durch einen Umbau der atomaren Elektronenstruktur unter Einwirkung von Hochdruck zustande kommt. Die äussere Hülle, « Perisphäre » (50–100 km), umfasst eine Zone wohlbekannter chemischer Struktur. Auf sie folgt die « Intersphäre » (bis 2900 km), die eine radikale Änderung der Eigenschaften der Atome aufweist, beruhend auf einem Übergang der Elektronen auf ein tieferes Energieniveau, das heisst « Degeneration » der chemischen Eigenschaften. Im Innersten befindet sich der Kern, « Zentrisphäre », eine « metallisierte » Phase mit einer konstanten Temperatur von 2000–2500°C, deren chemische Eigenschaften O sind und in der die Kerne in ein elektronisches Plasma eingebettet sind.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 5 (1956), S. 661-668 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A description is given of the determination of densities of aqueous solutions with the aid of a single quartz pycnometer having a capillary neck. The. determination is accurate within 0.001%. 2. The densities of aqueous uranyl nitrate solutions were investigated over the concentration range 0.7–52.4% by weight, the results being accurate within 0.01%. 3. The apparent molar volumes of uranyl nitrate In aqueous solutions at 25° were calculated. They can be expressed by the equation: $$\varphi V_{UO_2 (NO_3 )_2 } = 65,9 + 5,23\sqrt m .$$ 4. The apparent molar volume of the uranyl ion UO 2 2 + was calculated for infinitely dilute aqueous solution at 25°. In the system of Fajans and Johnson it is 7.1 ml/g-ion.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 6 (1957), S. 147-150 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. The solid phases found in the investigation of the system Zn(OH)2-H2O2-H2O are stable only when in equilibrium with the corresponding liquid phases. Only ZnO2 · 0.5 H2O was isolated as a chemical individual. 2. The final product of the dehydration of the various solid phases of the system is ZnO2 · 0.5H2O. 3. Further prolonged drying of ZnO2 · 0.5 H2O at 110° does not give anhydrous zinc peroxide, ZnO2, but is accompanied by decomposition of the peroxide. 4. Thermal analysis showed that ZnO2 · 0.5 H2O decomposes with elimination of H2O and active oxygen at 180–190°
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 5 (1956), S. 911-915 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary 1. A study was made of the fusion diagram of the system benzene-stannic bromide. A simple eutectic was established at −9.9° and 34.1 moles percent of stannic bromide. 2. The heat of mixing of the components at the eutectic composition and temperature was estimated and found to be 256 ± 125 cal per mole of mixture. 3. It was shown that structural concepts which explain the interaction of benzene and carbon tetrahalides are applicable also to binary systems of benzene and stannic halides. 4. It was shown that stannic bromide undergoes a polymorphous transformation at 15.3° The heat of transformation was determined and found to be 304± 15 cal/mole.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Russian chemical bulletin 5 (1956), S. 417-423 
    ISSN: 1573-9171
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary As the atoms of the elements are compressed under pressures rising to superhigh values, a) at first electrons pass into unfilled levels permitted by the Pauli exclusion principle, with the result that “degeneration” of the normal chemical properties of the atoms occurs and the whole structure of the periodic system of elements changes its form, and b) the “crushing” of the electronic envelopes then occurs with delocalization of electrons, complete loss of the chemical distinctions between the particles, and formation of a universal metallic state of matter. The paper examines the thermodynamics, quantum-chemical, and seismological data that support the above-stated views, and a hypothesis is advanced concerning the zonal structures of the interior of the earth and the physicochemical properties of the geochemical shells.
    Type of Medium: Electronic Resource
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