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  • 11
    ISSN: 1432-1041
    Keywords: triamterene ; pharmacokinetics ; diuretic effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The plasma and urinary levels of triamterene and two metabolites were measured using a specific method of analysis. Urinary excretion was completed after 48 h, which permitted a rough estimate of its half-life as longer than two hours. The areas under the curve were 672.5±160.3 and 1.311.3±399.1 µg/ml × h after the triameterene 150 mg and 300 mg p.o., respectively and correspondingly 4.2±1.4% and 3.7±0.6% of the dose were excreted as unchanged drug. The principal metabolite of triamterene found was the sulfate conjugate. The area under the curve of this metabolite amounted to 6.672±2.120 and 11.941±5.005 µg/ml × h after the of 150 mg and 300 mg triamterene doses, respectively. The urinary excretion of the metabolite varied between 25.0±4.0% and 17.5±3.5% of the dose after either dose. In healthy subjects an effect on sodium excretion was observed after a dose of 150 mg, whereas the potassium-retaining effect was observed only after the dose of 300 mg.
    Type of Medium: Electronic Resource
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  • 12
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 755-759 
    ISSN: 1432-1440
    Keywords: Knochenhistologie urämischer Osteopathie ; Calciumstoffwechsel ; metabolische Knochenerkrankungen ; Mikromorphometrie ; Bone ; Metabolic Bone Disease ; Uremic Osteodystrophy ; Calcium Metabolism ; Malignant Tumors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary It is unknown whether histomorphometric parameters of bone surface remodelling change uniformly throughout the skeleton in metabolic bone disease. In patients without skeletal disease (n=8), in patients with chronic renal failure (n=13) and in patients with malignant tumors (n=11), post mortem bone samples were taken from the core of the 5th lumbar vertebra, from the iliac crest, from the femural head and from the interepicondylar portion of the distal femur. Histomorphometric analysis was carried out in undecalcified sections stained after Masson-Goldner. The dispersion of histomorphometric parameters between the different skeletal sites (cancellous bone) was evaluated by analysis of variance. There existed marked differences in the surface extension of the histomorphometric parameters which are related to bone remodelling, suggesting marked differences in the local remodelling rates (iliac crest 〉 lumbar vertebra 〉 femural head 〉 distal femur). In patients with bone disease all histomorphometric parameters changed uniformly throughout the skeleton with the exception of inactive osteoid. The study shows that in metabolic bone disease local factors do not interfere with remodelling in response to systemic factors. It also provides evidence that bone biopsy samples from iliac crest spongiosa reflect with reasonable accuracy the changes occurring elsewhere in the skeleton, although inactive osteoid may accumulate in the iliac crest out of proportion to its increase in low-turnover sites.
    Notes: Zusammenfassung Bei skelettgesunden Kontrollpersonen (n=8), bei Patienten mit chronischer Niereninsuffizienz (n=13) und bei Patienten mit malignen Tumoren (n=11) wurden post mortem Knochenbiopsie-Proben aus dem 5. Lendenwirbelkörper, aus dem Bekkenkamm, aus dem Femurkopf und aus dem interepikondylären Teil des distalen Femur entnommen. Unentkalkte, nach Masson-Goldner gefärbte Dünnschnitte wurden histomorphometrisch untersucht. Die Varianz einzelner histomorphometrischer Parameter zwischen den unterschiedlichen Skelettorten wurde durch Varianzanalyse überprüft. Die histomorphometrischen Parameter, welche in Beziehung zum inneren Knochenumbau stehen, waren in den einzelnen Skelettorten außerordentlich unterschiedlich. Die lokalen Umbauraten differieren daher wahrscheinlich stark (Beckenkamm 〉 Lendenwirbelkörper 〉 Femurkopf 〉 distaler Femur). Bei Patienten mit Knochenerkrankungen änderten sich alle histomorphometrischen Parameter gleichsinnig an allen untersuchten Skelettorten. Lediglich die Volumendichte und die Oberflächendichte inaktiven Osteoids zeigte in den einzelnen Skelettorten ein signifikant unterschiedliches Verhalten. Die Untersuchung belegt, daß bei systemischen Knochenerkrankungen lokale Faktoren nicht die Antwort des Skeletts auf systemische Stimuli beeinträchtigen. Die Messergebnisse belegen, daß Knochenbiopsie-Proben aus der Beckenkammspongiosa mit hinreichender Genauigkeit die Vorgänge widerspiegeln, die in anderen Skelettorten ablaufen. Lediglich für inaktives Osteoid konnte bei urämischen Patienten gezeigt werden, daß in der Beckenkammspongiosa eine — im Vergleich zu Skelettorten mit niedrigerer Umbaugeschwindigkeit — überproportioniert starke Akumulation stattfindet.
    Type of Medium: Electronic Resource
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  • 13
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 323-324 
    ISSN: 1432-1440
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 14
    Electronic Resource
    Electronic Resource
    Springer
    Journal of molecular medicine 56 (1978), S. 445-448 
    ISSN: 1432-1440
    Keywords: Fibrinolysis ; Circadian rhythms ; Clinical trial ; Euglobulinlysis-time ; Fibrinolyse ; circadiane Rhythmik ; klinische Prüfung ; Euglobulinlyse-Zeit
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Bei 5 Probanden wurde über einen Zeitraum von 6 Wochen fünfmal die Anstiegsphase im Tagesrhythmus der fibrinolytischen Aktivität untersucht. Als Parameter wurden die Euglobulinlyse-Zeit und die Papierfibrinolyse, die Plasmaproteine, Fibrinogen, Plasminogen, α1-Antitrypsin und α2-Makroglobulin sowie die Thrombinocoagulase-Zeit und die Fibrinspaltprodukte erfaßt. Es zeigte sich bei allen Probanden der Anstieg der Fibrinolyse am Vormittag. Die Schwankungsbreite der fibrinolytischen Aktivität ist intraindividuell kleiner als bei einem interindividuellen Vergleich. Weiterhin zeigt sie mittags eine geringere Streuung als vormittags. Bei Untersuchungen zur klinischen Prüfung eines Soforteffektes von Arzneimitteln auf die Fibrinolyse sollte der Zeitraum der Plateauphase der fibrinolytischen Aktivität gewählt werden, um die Streuung der Ausgangswerte möglichst gering zu halten. Weiterhin ist die intraindividuelle Streuung der fibrinolytischen Aktivität in diesem Zeitraum geringer als während der Anstiegsphase im Rahmen des circadianen Rhythmus der Fibrinolyse. Eine intraindividuelle Kontrolle muß gewährleistet werden.
    Notes: Summary In five volunteers fibrinolytic activity has been measured five times over a period of six weeks during increasing values of circadian rhythm. Euglobulinlysis-time, paper fibrinolysis, fibrinogen, plasminogen, α1-antitrypsin, α2-makroglobulin, thrombinocoagulase-time and fibrin-split-products were used in one study. An increase of fibrinolytic activity in the mooning was observed in all volunteers. Intraindividual variation of values is considerable but less than variation of values compared interindividually. Moreover variation was smaller at noon than in the time before noon. In clinical trial of the short-time effect of drugs the period of the plateau of the fibrinolytic activity should be used because of its smaller variation of values. Furthermore, in this period the intraindividual variation of the fibrinolytic activity is smaller than during increasing slope of the circadian rhythm of fibrinolysis. Intraindividual control should be granted.
    Type of Medium: Electronic Resource
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  • 15
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 16
    Electronic Resource
    Electronic Resource
    Springer
    Theoretical and applied genetics 46 (1975), S. 213-214 
    ISSN: 1432-2242
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 17
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 273 (1975), S. 129-135 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Fractional hyperfine density shifts (fds) for137Ba+ (I=3/2) ions are measured by means of direct optical pumping in noble gas buffers. The results for the fds (137Ba+, 6s 2 S 1/2) in units of 10−9/Torr (0
    Type of Medium: Electronic Resource
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  • 18
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 284 (1978), S. 135-143 
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Optical pumping with theD 2 line is used to study the depolarization of the first excited2 P 3/2 states of alkaline earth ions and Yb+ ions in collisions with rare gas atoms. The deorientation cross sections for the even isotopes of Ba+ and Yb+ ions are obtained (in units of 10−16 cm2): rare gas He Ne Ar Kr Xeσ 1 (Ba+ 6p 2 P 3/2) 79(11) 89(13) 123(18) 152(22) 204(30)σ 1 (Yb+ 6p 2 P 3/2) 60(10) 62(9) 107(18) 133(17) 167(37) The cross sections are discussed in comparison with theoretical calculations and those of isoelectronic atoms. The comparison of the2 P 3/2 relaxation of even and odd (I=3/2) isotopes of Ba+ allows to draw conclusions on the nature of the depolarization interaction.
    Type of Medium: Electronic Resource
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  • 19
    ISSN: 1432-0878
    Keywords: Thyroid ; Ultrastructure ; Hypophysectomy ; TSH- and prolactin treatment ; Notophthalmus viridescens
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the newt, Notophthalmus viridescens, hypophysectomy results in progressive atrophy of the thyroid cells to the point of irreversible degeneration. After exclusive TSH-stimulation of hypophysectomized newts, increased endocytotic activity of the follicular epithelium is observed. Prolactin stimulation under the same conditions prevents atrophy but does not result in increased cell activity, as expressed by the reduced amount of microvilli and the lack of endocytotic activity. Combined TSH- and prolactin stimulation also results in cell activation, but the activation level of exclusively TSH-stimulated cells is not reached. Although prolactin prevents cellular atrophy and degeneration of the follicular epithelium, it reduces the TSH-induced activation of the thyroid epithelium.
    Type of Medium: Electronic Resource
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  • 20
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 197 (1979), S. 295-312 
    ISSN: 1432-0878
    Keywords: Thyroid gland ; C cells ; Ultimobranchial body ; Immunocytochemistry ; Morphometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Thyroid tissue of 300 routine autopsies was processed in a standardized manner. So-called solid cell nests (SCN) were found in 21 patients (7 %). These cases were investigated carefully by serial step sectioning. In order to explore the correlation of SCN to the C-cell system, the sections were stained by silver impregnation and the immunoperoxidase method. Morphometric analyses revealed a significant increase in the density of C cells in the proximity of the SCN. With progressive distance from the SCN, the C-cell density decreased and reached normal values. In 30 % of the cases argyrophilic and calcitonin-positive cells were found lying within the SCN. Occasionally, mixed follicles could be discerned: These were lined on the one side by a multilayered squamous epithelium, on the other side by normal monolayered cubic follicular epithelium, and contained a peculiar granular material. In one case, SCN were associated with intrathyroid portions of the parathyroids and adult adipose tissue, in a second case with adipose tissue only. Most probably SCN are vestiges of the ultimobranchial body and should be interpreted as such, despite the fact that other authors have expressed different views. The lack of disturbances in the calcium metabolism of the patients and the absence of medullary carcinoma in their family histories led us to interpret locally confined C-cell hyperplasia not as reactive nor premalignant, but rather as normal.
    Type of Medium: Electronic Resource
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