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  • 1990-1994  (2)
  • 1985-1989  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Mineralogy and petrology 45 (1991), S. 1-9 
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Eine Serie von 19 Rutilen aus unterschiedlichen geologischen Vorkommen zeigt eine deutliche Variabilität in den OH Konzentrationen. Der IR spektroskopisch bestimmte analytische H2O+-Gehalt variiert von 0.04 bis 0.21 Gew.%, wobei die höchsten Gehalte in Rutilen der Amphibolitfacies auftreten. Das wesentliche Merkmal der IR Spektren im Bereich der OH Streckschwingung ist eine einzelne schmale Bande bei 3280 cm−1; einige der Spektren zeigen entweder bei 3360 oder bei 3320 cm−1 eine zusätzliche Bande. Wahrscheinlich stellen die variierenden OH Konzentrationen, die mit einem geringen Gehalt an drei- und fünfwertigen Elementen schwach korreliert sind, eine Funktion der “Wasser”-Aktivitäten bei der Kristallisation dar.
    Notes: Summary A suite of 19 rutiles form a wide range of geological environments shows a distinct variability in the OH concentrations. The analytical H2O+ content determined by IR spectroscopy varies from 0.04 to 0.21 wt.% with the greatest amounts occurring in amphibolite facies rutiles. The main feature of the IR spectra in the region of the OH stretching fundamental is a single narrow band centered at 3280 cm−1; some of the spectra show an additional band, centered either at 3360 or at 3320 cm−1. Varying OH concentrations in rutiles are probably a function of the activity of hydrous components during crystallization and are weakly correlated to a minor content of tri- and pentavalent elements.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Acta neurochirurgica 77 (1985), S. 46-51 
    ISSN: 0942-0940
    Keywords: Intracranial pressure ; cerebrospinal fluid vasopressin ; plasma vasopressin ; hydrocephalus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The response of plasma and ventricular cerebrospinal fluid vasopressin concentration to short-time induced intracranial hypertension was studied in 8 patients with hydrocephalus, defined as ventricular enlargement on computerized tomography. In connection with measurement of conductance to cerebrospinal fluid outflow, the concentration of vasopressin in plasma and cerebrospinal fluid was measured during perfusion at a low (〈l0mmHg) and at a high (〉20 mmHg) intraventricular pressure level. Mean plasma vasopressin concentration was increased from 2.4±0.4pg/ml (SEM) during perfusion at the low pressure level to 4.2±0.8 pg/ml (p〈0.01) at the high pressure level. The cerebrospinal fluid concentrations of vasopressin at the low and high intraventricular pressure were 1.2 ±0.1pg/ml and 1.7±0.2 pg/ml (p〈0.05), respectively. However, only half of the patients responded to the increase in intraventricular pressure with an increase in cerebrospinal fluid vasopressin concentration exceeding 50%. The results of the present study suggest that an increase in the intracranial pressure might be a stimulus for vasopressin release in both the blood and the cerebrospinal fluid.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1434-9949
    Keywords: Sulfasalazine ; Drug-Related Lupus ; Systemic Lupus Erythematosus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The induction of lupus-like syndromes with the appearance of single-stranded DNA antibodies is a well-known complication of drug therapy. In this report we present a patient with an erosive seropositive rheumatoid arthritis developing the clinical and serological features of systemic lupus erythematosus including the occurrence of double-stranded DNA antibodies under sulfasalazine treatment.
    Type of Medium: Electronic Resource
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