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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 467-469 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Optical diffraction patterns from electron microscope (EM) images of different filaments show variation in the positions of intensity peaks along the layer lines, presumably because of distortions induced during staining and dehydration. For example, the radial positions of the strongest peaks on ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 287 (1980), S. 233-235 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1 The effect of Mg-ATP on thymus myosin. A, Thymus myosin was prepared essentially by the method of Pollard et a/.18 for platelet myosin. Samples of myosin (0.5 mg ml"1) were dialysed into 0.15 M KC1,10 mM MgCl2,1 mM EOT A, 0.1 mM DTT, 25 mM imidazole pH 7.O. Turbidity at ? = 340 nm was ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 299 (1982), S. 840-842 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] 5. acidocaldarius is a facultative sulphur-oxidizing autotroph whose natural habitat is hot acidic springs2. Cells are roughly spherical, 0.8-1.0 jjim in diameter, and are often lobed. When grown in autotrophic conditions with elemental sulphur as an energy source, the cells attach to sulphur ...
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    European journal of applied physiology 73 (1996), S. 169-174 
    ISSN: 1439-6327
    Keywords: Baroreceptors ; Vascular resistance ; Blood pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract To determine if different exercise modes used to improve cardiovascular fitness result in differing cardiovascular responses to lower body negative pressure (LBNP) in exercise-trained women, seven chronically exercising female runners (RUN) and 11 swimmers (SWIM) of similar fitness levels maximal oxygen uptake, [ $$\left( {\dot V{\text{O}}_{{\text{2max}}} } \right)$$ , mean (SEM) = 50 (2) and 45 (2) ml·kg−1·min−1, respectively; P 〉 0.05] underwent serial exposures to LBNP at pressures of 0, −1.3, −2.7 and −5.3 kPa (referenced to ambient barometric pressure). Forearm vascular resistance (venous occlusion plethysmography) increased with LBNP but did not differ between groups at any level of LBNP. At 0 and −1.3 kPa, the total peripheral resistance index (TPRI; impedance cardiography) was significantly (P 〈 0.05) higher in RUN than SWIM [1.118 (0.028) vs 0.787 (0.040) at 0 kPa and 1.245 (0.100) vs 0.840 (0.040) kPa·1·min−1 m−2 at −1.3 kPa]. At an LBNP of −2.7 kPa, stroke index (SI) was significantly higher in SWIM than RUN [57.8 (4.6) vs 41.9 (4.0) ml·beat−1 · m−2] while TPRI remained greater in RUN than SWIM. At −5.3 kPa, SWIM exhibited a higher cardiac index [3.232 (0.209) vs 2.447 (0.189) 1·min−1·m−2] and SI [49.4 (4.4) vs 31.0 (4.5) ml·beat−1·m−2] but reduced heart rate [71 (3) vs 83 (5)beats·min−1] and TPRI [0.968 (0.043) vs 1.655 (0.128) kPa·1·min−1 · m−2]. Mean arterial pressure declined significantly at an LBNP of −5.3 kPa in both groups; pulse pressure was lower (P 〈 0.05) in RUN than SWIM at LBNP values of −2.7 and −5.3 kPa. These data suggest that: (1) female runners experience a greater increase in systemic vasoconstriction even though female swimmers can better maintain their cardiac index at high levels of LBNP, and (2) training mode appears to affect the pulse pressure responses to LBNP in exercise-trained women.
    Type of Medium: Electronic Resource
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