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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 10 (1962), S. 381-391 
    ISSN: 0942-0940
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Examination of the cerebrospinal fluid in brain tumours with regard to the content of lactic acid, pyruvic acid, lactate dehydrogenase and aldolase shows no deviation from normal values. Determinations of these values from arterial and cerebral venous blood in connection with measurements of cerebral blood flow and of the amount of cerebral oxygen and glucose consumption, show that the quantitative cerebral balance with reference to intake or output of lactic acid, pyruvic acid and lactate dehydrogenase even in very extensive malignant brain tumours show the same results, as in healthy subjects. Output of higher amounts of aldolase in case of cerebral tumours was more frequently found, but in other tumours, some very extensive, there were negative balances. Also the quotient of glucose to oxygen consumption does not deviate from the average when compared to values in healthy patients. A higher shave of glycolysis in carbohydrate metabolism of cancer cells does not show in this examination. A biochemical cancer test for cerebral tumours on the basis of the above metabolic properties is not available.
    Abstract: Résumé Chez les sujets atteints de tumeur cérébrale, la teneur du LCR en ac. lactique, ac. pyruvique, lactate de deshydrogénase, et en aldolase, n'est pas différente des taux normaux. Ces mêmes mesures effectuées dans le sang artériel et veineux du cerveau, en relation avec les valeurs du volume du sang circulant et de la consommation d'O2 et de glucose à ce niveau, montrent que le bilan cérébral quantitatif relatif à l'utilisation ou au rejet des ac. lactique et pyruvique et du lactate de deshydrogénase, donne des résultats analogues chez des sujets porteurs de tumeurs très étendues et chez des sujets sains. On a fréquemment trouvé des valeurs élevées d'aldolase dans des cas de tumeurs cérébrales, toutefois chez d'autres sujets avec tumeurs mêmes très étendues les bilans furent négatifs. Même le quotient de la consommation de glucose/consommation d'O2 ne varie pas en moyenne, que les sujets soient sains ou porteurs de tumeurs cérébrales. Une partie élevée de la glycolyse du métabolisme des hydrates de carbone des cellules tumorales n'est pas mise en évidence par ces expériences. Ainsi on ne peut pas encore entrevoir de test basé sur le métabolisme de ces substances qui permettrait le diagnostic des tumeurs malignes.
    Notes: Zusammenfassung Untersuchungen des Liquors bei Hirntumoren auf den Gehalt an Milchsäure, Brenztraubensäure, Lactatdehydrogenase und Aldolase zeigen keine Abweichungen im Vergleich zur Norm. Differenzbestimmungen dieser Werte aus dem arteriellen Blut und dem Hirnvenenblut in Verbindung mit Messungen des Hirndurchblutungsvolumens, des cerebralen Sauerstoffverbrauches und Glukoseverbrauches zeigen, daß die quantitativen cerebralen Bilanzen bezüglich Aufnahme oder Abgabe von Milchsäure, Brenztraubensäure und Lactatdehydrogenase selbst bei zum Teil sehr ausgedehnten malignen Hirngeschwülsten dieselben Ergebnisse zeigen wie bei Gesunden. Abgabe höherer Werte von Aldolase bei Hirntumoren wurde häufiger gefunden, doch ergaben andere zum Teil ausgedehnte Geschwülste negative Bilanzen. Auch der Quotient Glukoseverbrauch/Sauerstoffverbrauch weicht bei Hirntumoren im Mittelwert nicht von Befunden bei Gesunden ab. Der hohe Anteil der Glykolyse am Kohlehydratstoffwechsel der Krebszelle kommt in diesen Untersuchungen nicht zum Ausdruck. Ein auf dieser Stoffwechseleigenheit basierender diagnostisch-klinischer Krebstest für Hirngeschwülste läßt sich nicht darstellen.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chemical Physics Letters 144 (1988), S. 473-478 
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chemical Physics Letters 33 (1975), S. 146-150 
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chemical Physics Letters 24 (1974), S. 85-87 
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Chemical Physics Letters 16 (1972), S. 174-176 
    ISSN: 0009-2614
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 86 (1982), S. 2929-2935 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 91 (1987), S. 3499-3503 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 595-597 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Using single-target off-axis sputter deposition, high quality superconducting films of YBa2Cu3O7−δ were made in situ. These films have properties which are distinctly different from those of bulk ceramics and of post-deposition annealed films. Their superconducting resistive transitions remain sharp regardless of the value of Tc between 75 and 86 K. Normal-state conductivities are as high or higher than the best single crystals. Critical current densities as high as 6×107 A/cm2 at 4.2 K. Tc (R=0) falls off with film thickness down to 10 K for 35–40 A(ring) films. All of the above properties are relatively insensitive to compositional variation. The results can be explained if the in situ growth results in well-formed CuO2 planes with defects occurring elsewhere.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 98 (1994), S. 6509-6513 
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 4992-5005 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The collisional deactivation of highly vibrationally excited 1,3,5-cycloheptatriene (CHT) in compressed gases, supercritical fluids, and in liquids was studied. Different bath gases and solvents (alkanes, alcohols, CO2, CHF3, nitrogen) and pressures up to 200 bars were used. This way, measurements covered the complete gas–liquid transition regime. CHT with a vibrational energy of 41 000 cm−1 was generated by laser excitation into the S1 state and internal conversion to the S0 ground state. From picosecond UV absorption measurements, energy-loss profiles were obtained taking into account the density dependent absorption spectra, which were measured separately. A monoexponential decrease of the internal energy in CHT was observed under all studied conditions. In gases at pressures up to 40 bars, the relaxation rates increase linearly with the density and the energies transferred per collision, 〈ΔE〉, agree with those values obtained in earlier low pressure gas phase experiments. At higher densities, the relaxation rates deviate markedly from predictions based on simple scaling assumptions with appropriate collision frequencies. The deactivation in liquids is slower by a factor of 3–5 than expected from such isolated binary collision (IBC) models. These results are rationalized using a model that takes into account the finite lifetime of collision complexes. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
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