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  • Collective effects  (1)
  • Key words: Bone mineral density – Lebanese  (1)
  • cell envelope  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Osteoporosis international 11 (2000), S. 756-764 
    ISSN: 1433-2965
    Keywords: Key words: Bone mineral density – Lebanese
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract: We determined the bone mineral density (BMD) of normal Lebanese subjects and compared results with US/European reference data. The investigation was conducted at one center, and included 858 women and 165 men aged 20–79 years. Spine, femoral and radial BMD measurements were made using dual-energy X-ray absorptiometry. Age-related changes in BMD were similar in form to those of US/European reference data. However, BMD values of Lebanese were generally lower than US/European values. Spine BMD of Lebanese women was about 8% lower than US/European values between ages 20 and 59 years, and 5–6% lower for ages 60–79 years. Femoral neck BMD values for Lebanese women were 8% lower in the young adult years (age 20–39 years), but only 2–3% lower in the postmenopausal years, compared with US/European women. There were smaller postmenopausal decreases in femoral and radial BMD in Lebanese women compared with US/European women, which led to a convergence of BMD after age 70 years. The BMD of Lebanese men was 5–8% lower than US/European values throughout the age range (20–79 years). The effect of weight on BMD ranged from 0.2% to 0.4% per kilogram. Height was not significantly associated with BMD when both height and weight were entered in multiple regression analyses. The prevalence of osteoporosis appeared to be overestimated if the US/European reference data, rather than Lebanese reference data, were used to calculate T-scores.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0392-6737
    Keywords: Collective effects
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Measurements of the resistivity tensor of a range of moderately dopedn-InAs samples were carried out at low temperatures in the ionized impurity scattering regime. Analyses were performed while the electron gas was in a degenerate state and below the quantum limit. The temperature and the magnetic-field dependences of the two components of the resistivity tensor, ϱ‖ (longitudinal) and ϱ⊥ (transverse), were discussed in terms of localization and correlation effects.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 160 (1988), S. 241-247 
    ISSN: 1573-5117
    Keywords: acid stress ; bacteria ; biodegradation ; cell envelope ; copper stress ; ultrastructural/physiological correlates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A description is given of concurrent changes in bacterial ultrastructure and physiology in relation to applied stresses of acid and/or copper: the environmentally-relevant correlations are explored as a potential tool for ascertaining mechanisms of acid rain damage. Ultrastructural analysis permits a differentiation, on a gross scale, between different levels of acid and combined acid/copper stresses in laboratory experiments on enrichment cultures of lacustrine microbial populations rich in Gram-negative bacteria. For the dominant morphotypes of Gram-negative bacteria, changes in the cell envelope (and its extensions) correlate also with changes in activity of envelope-associated enzymes.
    Type of Medium: Electronic Resource
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