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  • 1985-1989  (3)
  • 1965-1969  (3)
Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 148 (1968), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European archives of oto-rhino-laryngology and head & neck 242 (1985), S. 329-335 
    ISSN: 1434-4726
    Keywords: Inner ear thrombosis ; Iron particles ; Magnetic forces
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary We describe a method for the photometric assay of the content of carbonyl iron powder in the blood and discuss a process comparing the in vitro effects of bar magnets on flowing carbonyl iron powder suspensions. We have used this method experimentally on laboratory animals and have induced thrombosis of inner ear vessels with magnetic forces following injections of the carbonyl iron powder.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Experiments in fluids 7 (1989), S. 412-420 
    ISSN: 1432-1114
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The shadowgraph method is applied to thermal convection experiments and electro-hydrodynamic convection (EHC) in nematic liquid crystals. In both cases convection leads to a spatially periodic field of the refractive index causing a spatially periodic intensity modulation of parallel light passing the cell. Close to the onset of convection the temperature or director field is given by linear stability analysis. Knowing these functions the determination of their amplitudes becomes possible by means of the shadowgraph method. The method is demostrated using various examples of thermal and EHC convection experiments.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Physics and chemistry of minerals 16 (1989), S. 668-671 
    ISSN: 1432-2021
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Notes: Abstract The influence of pressure on the OH-stretching vibration of zoiste has been studied by single crystal high pressure infrared spectroscopy. A band related to the OH-stretching vibration displayed a linear shift from 3170 cm−1 at 1 bar to 2795 cm−1 at 116 kbar. The half-band width increased linearly with respect to pressure from 60 cm−1 at 1 bar to 500 cm−1 at 116 kbar. The strength of the absorption of this band is strongly frequency dependent. The high-energy shift of a band at around 2200 cm−1 on pressure increase indicates that this band is not due to a second OH-stretching vibration as previously suggested by Langer and Lattard (1980).
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 46 (1968), S. 1149-1155 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Urinary excretion of free 17-OHCS and unconjugated cortisol, cortisone, tetrahydrocortisol, tetrahydrocortisone and of 20- and 6β-hydroxymetabolites were measured in 9 patients with biopsyproven cirrhosis of the liver. The results are compared with data from normal subjects. To evaluate the circadian variations the urinary excretion of the above mentioned steroids was determined in six consecutive 4-hr. periods starting at 8 o'clock in the morning. Mean urinary excretion of free 17-OHCS and the summation of the 8 individual steroids in 9 patients with liver disease was significantly greater than the mean excretion in the group of 10 control subjects. Patients with cirrhosis of the liver excreted more cortisone than cortisol. The ratio of C6 and C20 hydroxylated metabolites to cortisol and cortisone was higher than the correlated value of tertrahydrocortisol and tetrahydrocortisone to the free biological active hormones. The results demonstrate a qualitative and quantitative change in metabolic transformation of cortisol. The circadian variations in urinary unconjugated cortisol, cortisone and their main metabolites were absent in patients with cirrhosis of the liver. These findings support the concept of hepatic regulation of pituitary ACTH secretion by the feedback mechanism in so far as progressive impairment in hepatic degradation of cortisol may lead to a lessened diurnal variation of the free cortisol and its metabolites, pituitary suppression and, in turn, reduced adrenocortisol cortisol production.
    Notes: Zusammenfassung Die Ausscheidung der freien 17-OHCS und der biologisch aktiven freien Einzelsteroide Cortisol und Cortison, deren Tetrahydroverbindungen sowie die 20- und 6β-Hydroxymetaboliten wurde bei 9 Patienten mit Lebercirrhose im Vergleich mit einem Normalkollektiv untersucht. Zur Erfassung von Veränderungen des tageszeitlichen Ausscheidungsrhythmus wurden die Steroide in 6 vierstündigen auf einanderfolgenden Ausscheidungsperioden gemessen. Die mittlere Ausscheidung der freien 17-Hydroxycorticosteroide sowie die Summe der 8 bestimmten Einzelsteroide war im Cirrhosekollektiv höher als bei den Normalpersonen. Patienten mit Lebercirrhose schieden im Unterschied zu Gesunden mehr Cortison als Cortisol aus. Das Verhältnis der an C6 und C20 hydroxylierten Verbindungen zu Cortisol und Cortison war bei den Patienten mit Lebercirrhose höher als das entsprechende Verhältnis der Tetrahydroverbindungen zu den nicht-metabolisierten Hormonen jeweils im Vergleich zum Normalkollektiv. Aus den Befunden wird auf eine qualitative und quantitative Störung der Cortisolsekretion und seines Metabolismus geschlossen. Der bei Gesunden zu beobachtende tageszeitliche Ausscheidungsrhythmus war bei den Cirrhosepatienten als Folge der metabolischen Veränderungen weitgehend aufgehoben. Die Befunde stützen die auf Grund früherer Ergebnisse anderer Autoren angenommene Hypothese, daß die Leber eine wesentliche Funktion bei den physiologischen Regelvorgängen zur Aufrechterhaltung einer normalen Nebennierenrindensekretion hat.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 235 (1968), S. 216-218 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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