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  • 42.55.Gp  (1)
  • Glucose tolerance factor  (1)
  • ISM: molecules  (1)
  • Springer  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Dopant-induced excimer laser ablation of poly(tetrafluoroethylene) (1992)
    Springer
    Applied physics 55 (1992), S. 488-493 
    Details
    ISSN: 1432-0649
    Keywords: 42.55.Gp ; 78.65 ; 81.60.Jw ; 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Clean ablation of poly(tetrafluoroethylene) (PTFE) at etch rates in excess of 7µm/pulse has been achieved with an excimer laser using 308nm radiation and a 25 ns pulse width. This was accomplished by doping the ultraviolet-transparent PTFE polymer with polyimide. Ablation rates were investigated as a function of fluence in the range from 1 to 12J/cm2 and dopant levels up to 15% (wt/wt). Results show that at a given fluence there exists an optimum absorption coefficient ⇌max, for which maximum ablation rates are achieved. The value of ⇌max was found to decrease with increasing fluence. The relationship between ⇌max and fluence was determined from existing ablation rate models and found to compare favorably with empirical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00332507
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  • 2
    Electronic Resource
    Electronic Resource
    Chromium in carbohydrate and lipid metabolism (1997)
    Springer
    JBIC 2 (1997), S. 675-679 
    Details
    ISSN: 1432-1327
    Keywords: Key words Chromium ; Insulin receptor ; Low-molecular-weight chromium-binding ; substance ; Diabetes ; Glucose tolerance factor
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract  Since the discovery in the 1950s that mammals have a nutritional requirement for chromium, the biological function of chromium has been sought. Candidates for the naturally-occurring biologically active form of chromium have been proposed, but, until recently, all have been shown to be artifacts. Recent studies examining the properties of the oligopeptide low-molecular-weight chromium-binding substance (LMWCr) suggest that this material may have a role in carbohydrate and lipid metabolism as part of a novel insulin-signaling amplification mechanism and may have implications in the treatment of diabetes and related conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s007750050183
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  • 3
    Electronic Resource
    Electronic Resource
    Near-infrared imaging of H2 in molecular outflows from young stars (1995)
    Springer
    Astrophysics and space science 224 (1995), S. 121-124 
    Details
    ISSN: 1572-946X
    Keywords: Shock waves ; ISM: jets and outflows ; ISM: molecules ; Infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract In an attempt to identify the molecular shocks associated with the entrainment of ambient gas by collimated stellar winds from young stars, we have imaged a number of known molecular outflows in H2 v=1-0 S(1) and wide-band K. In each flow, the observed H2 features are closely associated with peaks in the CO outflow maps. We therefore suggest that the H2 results from shocks associated with the acceleration or entrainment of ambient, molecular gas. This molecular material may be accelerated either in a bow shock at the head of the flow, or along the length of the flow through a turbulent mixing layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00667834
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