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  • 1
    Electronic Resource
    Electronic Resource
    Serum intact parathyroid hormone levels in elderly Chinese females with hip fracture (1992)
    Springer
    Calcified tissue international 51 (1992), S. 412-414 
    Details
    ISSN: 1432-0827
    Keywords: Serum PTH ; 25OHD ; 1,25(OH)2D ; Albumin ; Ionized calcium ; Hip tracture
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Notes: Summary Serum intact parathyroid hormone (PTH), 25 hydroxyvitamin D(25OHD), 1,25 dihydroxyvitamin D (1,25(OH)2D), albumin, and ionized calcium were measured in 61 Chinese female patients with hip fracture and 61 control subjects. Hip fracture patients had low albumin, ionized calcium, and 250HD levels. Serum PTH and 1,25 (OH)2D values were not different between the two groups. We conclude that although 250HD level in hip fracture patients is low, there is no evidence of secondary hyperparathyroidism, suggesting that the low 250HD levels may be a secondary phenomenon in response to the fracture.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00296672
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    Paper (German National Licenses)
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  • 2
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    The polar cap structure of the X-ray pulsar 4U 1538 - 52 (1992)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: We compare the pulse-phase-dependent spectral observations of 4U 1538 - 52 obtained from Ginga to a series of static model atmospheres of curved accreting polar caps, utilizing a magnetized radiative transfer code with relativistic polarized cross sections. A chi-squared fit was performed on the symmetrized pulse shapes, allowing the parameters of the two polar caps to vary independently. We find evidence for a significant difference between the caps, both in terms of opening angle and temperature, while the optical depth is similar and compatible with radiative deceleration models. The polar caps appear larger than what is usually estimated from dipole fields, and are not located at the antipodes of each other. A broader distribution of magnetic fields is required than expected from a dipolar field at constant radius. If the magnetic field is indeed dipolar, it should be off-center in respect to the star and the accretion shock height exhibits an unusual dependence on the polar angle. An alternative possibility is that the magnetic field is disordered on scales small compared to the polar cap radius.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 395; 2 Au; 564-574
    Format: text
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    NASA TECHNICAL REPORTS
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