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  • 1
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using perturbed angular correlations we studied the formation of a cubic symmetry defect trap in Ni near 350 K following plastic deformation at 295 K. The trap has been identified structurally as a trivacancy trap. The evolution of the defect-free and cubic trap site populations in the course of isochronal and isothermal annealing experiments leads to the conclusion that the cubic trap forms by simple trapping, and that the capture radius of the cubic trap for additional defects is very small.
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  • 2
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The quadrupole coupling frequency of an111In-defect bound state in Pt with ω0(295 K) = 200 Mrad/s was measured over the range 4 – 300 K using perturbed angular correlations. The temperature dependence exhibited positive curvature, unlike the T3/2 dependence observed in noncubic metals, and was fitted using a model which assumed that the temperature dependence was caused by vibrations of a resonant mode in the probe-defect complex.
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  • 3
    ISSN: 1572-9540
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In previous work, we introduced hydrogen (H) into Ni and Pt metals at room temperature by electrolysis. To study H-vacancy interactions on an atomic scale, trapping of diffusing H atoms at impurity-vancancy complexes was detected using perturbed γ-γ angular correlations. Two new results are reported here: (1) Transformation rules are clarified between undecorated and H-decorated complexes which are detected after annealing Pt at 323 K. In addition, non-cubic In sites were observed to form by chargingannealed, Pt, which are attiributed either to H atoms at random in the lattice or to precursor nuclei of a Pt hydride. (2) NiH is observed to form under cathodic charging of Ni at high current densities, and detected by growth of a nonmagnetic, cubic metastable phase.
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  • 4
    ISSN: 1439-6327
    Keywords: Noise ; Plasma catecholamines ; Pituitary adrenal hormones ; Man
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To evaluate the immediate effect of exposure to a high level of noise on the sympatho-adrenal and pituitary-adrenal systems, measurements were made of circulating catecholamines, growth hormone, ACTH, and cortisol in seven normal male subjects. They were studied on two random experimental days: a control day and a noise-exposure day with an intermittent noise alternating between 99 dB (A) and 45 dB (A) for 2 h. Analysis did not reveal any variation in the plasma levels of norepinephrine (NE), epinephrine (E) or dopamine (D), measured every 20 min, which might have been related to noise exposure. Similarly, analysis of the 2-h urine samples collected from 8 a.m. to 2 p.m. revealed no significant changes in urinary catecholamine excretion. Plasma levels of GH and ACTH did not differ significantly from those for control days, but cortisol showed a brief, significant levelling-off in its pattern during the exposure period. The data demonstrate that exposure to a high level of noise, although considered as “unpleasant”, does not induce any important endocrinological changes in man. These conclusions differ from those for studies on animals where reactions to noise may be related to a more general stressing situation.
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  • 5
    ISSN: 1439-6327
    Keywords: Aldosterone regulation ; Plasma electrolytes ; Rectal temperature ; Sweat loss
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The effect of 90-min heat exposure (46
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 2 (1849), S. 409-582 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 1 (1847), S. 20-71 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Virchows Archiv 1 (1847), S. 528-546 
    ISSN: 1432-2307
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
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  • 9
    ISSN: 1432-1440
    Keywords: Magnesium ; calcium ; pancreas ; secretin. pancreozymin ; chronic pancreatitis ; primary hyperparathyroidism ; Magnesium ; Calcium ; Pankreas ; Sekretin ; Pankreozymin ; chronische Pankreatitis ; primärer Hyperparathyreoidismus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung 1. Die Sekretion von Magnesium (Konzentration und Ausscheidung) wurde im menschlichen Duodenalsaft vor und nach Stimulation des Pankreas mit Sekretin und Pankreozymin gemessen und mit den Werten für Calcium verglichen. Es wurden 27 Personen mit normaler Pankreasfunktion, 23 Patienten mit mäßiger und 22 mit ausgeprägter Pankreasinsuffizienz sowie 14 Kranke mit primärem Hyperparathyreoidismus untersucht. 2. In allen Funktionszuständen des Pankreas wurden bei normaler Bauchspeicheldrüse Magnesium und Calcium parallel sezerniert, die Korrelation war signifikant positiv. Nach Sekretin erniedrigte sich die Konzentration. Pankreozymin erhöhte sowohl die Konzentration als auch die Ausscheidung. 3. Die parallele Sekretion fand sich mit wenigen Ausnahmen auch bei Pankreasinsuffizienz. Hier war die Sekretion beider Elektrolyte nach Pankreozymin signifikant erniedrigt, wenn auch die Enzymsekretion vermindert war. 4. Bei primärem Hyperparathyreoidismus fand sich bei normaler Pankreasfunktion eine gegenüber der Norm erhöhte Konzentration und Ausscheidung für Magnesium und Calcium nach Pankreocymin, während bei gestörter Enzymsekretion auch die Elektrolytsekretion vermindert war. Bei Hyperparathyreoidsmus wurde die Magnesiumsekretion durch Pankreozymin stärker stimuliert als die von Calcium. Die Parallelität im Verhalten von Magnesium und Calcium war hier nicht mehr gewahrt.
    Notes: Summary 1. The secretion of magnesium (concentration and output) was measured in human duodenal juice before and after stimulation of the pancreas by secretin and pancreozymin (1 unit/kg) and compared with the behaviour of calcium 27 subjects with normal pancreatic function, 23 patients with moderate and 15 with severe pancreatic insufficiency and 14 patients with primary hyperparathyroidism were investigated. 2. In all functional states of the normal pancreatic gland magnesium and calcium were secreted in close positive correlation. The concentration was lowered after secretin. Pancreozymin increased both the concentration and the output of the two electrolytes. 3. The parallel secretion was also found, at few exceptions, in the patients with pancreatic insufficiency. Here, the secretion of both electrolytes was significantly diminished after pancreozymin together with the lowered secretion of enzymes. 4. In primary hyperparathyroidism associated with normal pancreatic function a higher than normal concentration and output of magnesium and calcium after pancreozymin were measured. When enzyme secretion was disturbed in these patients as well the secretion of the two electrolytes was lowered. In primary hyperparathyroidism the secretion of magnesium was more markedly stimulated by pancreozymin than that of calcium. The parallelism in the behaviour of magnesium and calcium was no longer present in this situation.
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  • 10
    ISSN: 1432-0584
    Keywords: Complement system ; C1 inhibitor ; Bone marrow transplantation ; Capillary leak syndrome
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Capillary leak syndrome (CLS) is a severe complication after bone marrow transplantation (BMT). To investigate whether there is a pathogenetic role of the complement system, we monitored the levels of the terminal complement complex C5b-9 (TCC) and C3a-desArg as indicators of an activation of the complement system and the inhibitor of the classical pathway of the complement cascade, C1 inhibitor (C1-INH), in 48 bone marrow transplant recipients from 1 week before to 5 weeks after transplantation. Capillary leak syndrome developed in 7 out of 48 patients between days 1 and 12 after BMT. Complement activation as indicated by TCC levels was more pronounced in patients with CLS (n=7) from day −8 to +28 (p〈0.05; day −1) and the elevation of TCC levels lasted longer in CLS patients (peak day 21) than in patients without this complication (peak day 7). Mean C3a-desArg levels were highest in patients with CLS reaching a peak at day 7. During the early posttransplant period a significant elevation of C1-INH levels (p〈0.01 and p〈0.05 respectively) compared with baseline levels (day −8) was found in patients with and without CLS, which was more pronounced in those patients with CLS (p〈0.05). Although we could not observe an absolute C1-INH deficiency as compared to healthy individuals our data support the presence of a relative deficiency of the inhibitor which might explain the reported beneficial effects of C1-INH substitution in BMT related CLS.
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