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  • Sprinting  (1)
  • dimethylamine  (1)
  • 1995-1999  (2)
  • 1980-1984
  • 1
    Electronic Resource
    Electronic Resource
    Gas-solid structure differences in the donor-acceptor complex (CH3)2HN−SO2 (1996)
    Springer
    Journal of chemical crystallography 26 (1996), S. 533-538 
    Details
    ISSN: 1572-8854
    Keywords: Sulfur dioxide ; dimethylamine ; dative bond ; gas-solid structure difference ; donor — acceptor adduct ; nitrogen — sulfur bond ; Lewis acid-base complex
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The crystal structure of the donor — acceptor adduct (CH3)2HN−SO2 is reported. Crystals of the compound are clear prisms, space group Pna21; at −96°C,a=9.894(1),b=6.051(2),c=16.478(3) Å,D=1.469 g/cm3,V=786.6(5) Å,Z=8. The unit cell contains two crystallographically independent adducts, with N−S bond lengths of 2.015(3) Å and 1.991(3) Å. The average value, 2.00(1) Å is 0.33(4) Å shorter than the 2.34(3) Å value previously determined from microwave spectroscopy of the gas phase species, revealing a large medium effect on the length of the donor — acceptor bond. The structural results are compared with published data for the trimethylamine — SO2 adduct, and discussed in terms of existing experimental and theoretical results for other donor — acceptor systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668411
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  • 2
    Electronic Resource
    Electronic Resource
    Skeletal muscle histology and biochemistry of an elite sprinter, the African cheetah (1997)
    Springer
    Journal of comparative physiology 167 (1997), S. 527-535 
    Details
    ISSN: 1432-136X
    Keywords: Key words Cheetah ; Fiber type ; Mitochondrial volume density ; Skeletal muscle ; Sprinting
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract To establish a skeletal muscle profile for elite sprinters, we obtained muscle biopsy samples from the vastus lateralis, gastrocnemius and soleus of African cheetahs (Acinonyx jubatus). Muscle ultrastructure was characterized by the fiber type composition and mitochondrial volume density of each sample. Maximum enzyme activity, myoglobin content and mixed fiber metabolite content were used to assess the major biochemical pathways. The results demonstrate a preponderance of fast-twitch fibers in the locomotor muscles of cheetahs; 83% of the total number of fibers examined in the vastus lateralis and nearly 61% of the gastrocnemius were comprised of fast-twitch fibers. The total mitochondrial volume density of the limb muscles ranged from 2.0 to 3.9% for two wild cheetahs. Enzyme activities reflected the sprinting capability of the cheetah. Maximum activities for pyruvate kinase and lactate dehydrogenase in the vastus lateralis were 1519.00 ± 203.60 and 1929.25±482.35 μmol min−1 · g wet wt−1, respectively, and indicated a high capacity for glycolysis. This study demonstrates that the locomotor muscles of cheetahs are poised for anaerobically based exercise. Fiber type composition, mitochondrial content and glycolytic enzyme capacities in the locomotor muscles of these sprinting cats are at the extreme range of values for other sprinters bred or trained for this activity including greyhounds, thoroughbred horses and elite human athletes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003600050105
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