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  • 1
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Zusammenfassung Die Ermittlung der wahren Erstarrungspunkte von Gemischen aus zwei und mehr Bestandteilen bietet in der Praxis erhebliche Schwierigkeiten. Deshalb wird die Möglichkeit untersucht, eine eindeutige Beziehung zwischen Zusammensetzung und Erstarrungstemperatur zu erhalten, indem man nicht eine theoretische Erstarrungstemperatur, sondern die genaue Zusammensetzung für eine bestimmte Temperatur zu ermitteln versucht. Es werden Gleichungen angegeben, mit Hilfe derer für jede gemessene Temperatur die Zusammensetzung der entsprechenden binären Mischung errechnet werden kann. So werden die binären Schmelzdiagramme und das ternäre Schmelzdiagramm der drei Mononitrotoluole bestimmt. Auf der Basis dieser Untersuchungen wird die Grenze der Gültigkeit der idealen Gesetze für Isomerenmischungen festgestellt. Außerdem wird eine einfache, physikalische Analysenmethode für Mischungen von drei Bestandteilen, insbesondere von den drei Nitrotoluolen vorgeschlagen.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1434-6079
    Keywords: 34.50H ; 79.20N ; 61.14F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We present detailed double differential distributions of electrons emitted downstream when 100 and 170 keV protons interact with thin carbon, gold and aluminuum foils and compare them to those obtained with protons and neutral hydrogen projectiles interacting with helium gas. The distributions obtained with the gas target show, besides the well known convoy electron peak produced by capture or loss of electrons into the continuum of the emerging ion, a narrow ridge that is aligned with the beam direction. This ridge, which is attributed to electrons moving in the two Coulomb center potential saddle determined by the target and projectile ions, also appears in the ion-solid electron distributions. A typical solid state effect consists in the appearance of two strong lateral humps which are explained as due to diffraction of the ridge electrons in the three dimensional lattice of the polycrystalline foil material. Contrarily the diffraction of convoy electrons is impeded by their strong correlation to the moving ions. In the case of the Aluminuun target the observed diffraction is typical for Al2O3. This indicates that the observed electrons originate from a thin polycrystalline oxyde layer close to the downstream surface of emission.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-6079
    Keywords: 34.50.H ; 79.20.N ; 61.14.F
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In this note we correct previous evidence, according to which a structure, found in double-differential electron distributions induced by ion beam-foil interaction, could be interpreted in terms of Bragg diffraction. We now attribute this structure to a distortion of the electric field of our spectrometer and present distributions taken with a new equipment in which this distortion is eliminated.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1432-1041
    Keywords: Codeine ; placebo ; double-blind study
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a double-blind study the analgesic activity of a new compound, diviminol 100 mg, was compared with that of codeine 60 mg, and a placebo given as single oral doses to three comparable groups of 30, 31 and 32 patients with post-partum pain. The two drugs were very significantly more active than the placebo on comparing both the hourly pain relief scores, and the frequency of satisfactory analgesia. There was no significant difference between the new drug and the reference coumpound. No undesirable side-effects were noted. These results in post-partum pain provide additional evidence that diviminol is a clinically effective analgesic agent.
    Type of Medium: Electronic Resource
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