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  • 1980-1984  (8)
  • 1955-1959  (2)
  • 1
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 52 (1980), S. 1071-1079 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 53 (1981), S. 92-98 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 53 (1981), S. 2053-2056 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 180 (1957), S. 924-925 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] For several years we have prepared extracts from cow ovaries in the hope that such extracts would prove to have carcinostatic activity. Our early experiments gave somewhat variable results, and sometimes indeed the extracts we prepared hastened, rather than prevented, the death of animals with ...
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 43 (1955), S. 596-609 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der erste Teil enthält die Beschreibung des neuen 1,5-m- und 2-m-Spektrometers. Der Unterschied zwischen dem alten und neuen Modell ist, daß die Lage der Photoröhren nun viel beweglicher und daß die maximale Anzahl der Photoröhren für das 2-m-Spektrometer 68, und 50 für das 1,5-m-Instrument ist. Die Konsole wurde verbessert, obwohl das Prinzip der elektrischen Einrichtungen dasselbe bleibt (Integrator, Wechselstromverstärker, Registriereinrichtung). Das Kontrollsystem ist jedoch vollständig verschieden. An Stelle von Stufenschaltern hat das neue Gerät polarisierte Relais. Mit dieser neuen Vorrichtung kann das Registrierschema in den verschiedenen Gruppen schnellstens verändert werden. Die maximale Anzahl der Kanäle ist 240. Um den Bedürfnissen kleinerer Firmen entgegenzukommen, bauen wir jetzt eine kleinere Einheit mit 20 Kanälen. Mit diesem Instrument kann schon ein beträchtliches analytisches Programm erledigt werden. Es besitzt den Vorteil, daß eine zweite Konsole zusätzlich zur ersten angebracht werden kann, um die Anzahl der zu analysierenden Elemente zu erhöhen. Neueste Analysenresultate von Phosphor und Stahl, die mit einer neuen von ARL (Applied Research Laboratories) entwickelten optischen Einrichtung erhalten wurden, werden kurz beschrieben.
    Abstract: Résumé On décrit en premier lieu deux nouveaux spectrographes à réseau de 1,5 m et 2 m. La différence entre l'ancien et le nouveau modèle tient surtout dans le fait que la position des phototubes est plus facilement réglable, le nombre des phototubes peut être 68 dans le spectrographe de 2 m et 50 dans celui de 1,5 m. Le support a été perfectionné bien que le montage électrique reste le même (intégrateur, amplificateur à courant continu, enregistreur). Le système de controle est entièrement différent. Au lieu d'utiliser des contacts à plots, on emploie dans le nouvel appareil des relais polarisés. Avec ce nouvel arrangement on peut changer plus facilement l'ordre d'enregistrement dans les différents groupes. Le nombre maximum de combinaisons est 240. Afin de satisfaire aux demandes de firmes moins importantes nous avons construit un appareil à 20 combinaisons. On peut cependant avec ce nouvel instrument réaliser un important programme analytique. Il présente en outre l'avantage qu'on peut lui adjoindre un second support afin d'augmenter le nombre d'éléments analysés. On décrit enfin brièvement les résultats obtenus récemment dans l'analyse du phosphore dans les aciers grâce à l'emploi d'un montage optique étudié et réalisé par la société ARL.
    Notes: Summary The first part consists in the description of the new 1.5-m and 2-m spectrometers. The difference between the old type model and the new one is that the position of the phototubes is now much more flexible and that the maximum number of phototubes can be 68 in the 2-m spectrometer and 50 in the 1.5-m instrument. The console has been improved, although the principle of the electrical features remains the same (integrators, a. c. amplifier, recorder). The control system, however, is entirely different. Instead of using stepping switches, the new unit has polarized relays. With this new arrangement, the recording order in the various groups can be changed most readily. The maximum number of channels is 240. In order to meet the requirements of smaller firms, we are now building a new unit containing 20 channels. With this instrument an analytical program of considerable importance can already be performed. It presents the advantage that a second console can be subsequently added to the first unit in order to increase the number of elements to be analyzed. Recent results obtained in the analysis of phosphorus and steel using a novel optical device developed by ARL are briefly described.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 26 (1984), S. 489-495 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The almost exclusive association of the molecular geometry dependence of the relativistic correction with the valence orbital contribution to the mass-velocity and Darwin terms is investigated using SCF and MCSCF wavefunctions. The requirement of orthogonality of the valence orbitals to the core orbitals is confirmed to be the mechanism responsible for the increase in (the absolute value of) relativistic energy upon decrease of the internuclear distance. Certain “fingerprint”-type features of the valence relativistic correction, revealing the identity of the particular core orbital giving rise to it, are identified.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 19 (1981), S. 293-300 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mapping between the local one-body potential and the ground state density is discussed. The role of degenerate ground states, which form a set of measure zero in potential space, is shown to be amplified by the unitary transformation between degenerate densities, forming a space filling set in density space. A numerical experiment demonstrating these features is carried out. No indication of non-V representable densities is encountered.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 18 (1980), S. 1049-1055 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A partitioning of the kinetic and potential energies of atoms within the SCF framework into shell components is proposed. It is demonstrated that this partitioning nearly satisfies a shellwise viral theorem for SCF wave functions. This property is used in order to generate approximate relaxed wave functions for atomic hole states by scaling each shell of the frozen description of the hole in terms of the neutral-atom ground-state orbitals. Very good estimates of ΔSCF relaxation energies and reasonable estimates of the overlap integrals between the frozen and relaxed hole wave functions are obtained.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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