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  • 1
    Electronic Resource
    Electronic Resource
    The relation between QTc interval prolongation and diabetic complications. The EURODIAB IDDM Complication Study Group (1999)
    Springer
    Diabetologia 42 (1999), S. 68-75 
    Details
    ISSN: 1432-0428
    Keywords: Keywords Insulin-dependent diabetes mellitus ; corrected QT interval ; QT prolongation ; prevalence ; neuropathy ; nephropathy ; ischaemic heart disease.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The prevalence of QT interval prolongation is higher in people with diabetes and its complications. Sudden death has been reported as a common cause of death in insulin-dependent diabetic patients affected by autonomic neuropathy. It has been postulated that QT prolongation predisposes to cardiac arrhythmias and sudden death. In this analysis the prevalence of QT interval prolongation and its relation with diabetic complications were evaluated in the EURODIAB IDDM Complications Study (3250 insulin-dependent diabetic patients attending 31 centres in 16 European countries). Five consecutive RR and QT intervals were measured with a ruler on the V5 lead of the resting ECG tracing and the QT interval corrected for the previous cardiac cycle length was calculated according to the Bazett's formula. The prevalence of an abnormally prolonged corrected QT was 16 % in the whole population, 11 % in males and 21 % in females (p 〈 0.001). The mean corrected QT was 0.412 s in males and 0.422 s in females (p 〈 0.001). Corrected QT duration was independently associated with age, HbA1 c and blood pressure. Corrected QT was also correlated with ischaemic heart disease and nephropathy but this relation appeared to be stronger in males than in females. Male patients with neuropathy or impaired heart rate variability or both showed a higher mean adjusted corrected QT compared with male patients without this complication. The relation between corrected QT prolongation and autonomic neuropathy was not observed among females. In conclusion we have shown that corrected QT in insulin-dependent diabetic female patients is longer than in male patients, even in the absence of diabetic complications known to increase the risk of corrected QT prolongation. [Diabetologia (1999) 42: 68–75]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001250051115
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  • 2
    Electronic Resource
    Electronic Resource
    Reduction of the electron thermal conductivity produced by ion Bernstein waves on the Frascati Tokamak Upgrade tokamak (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 4721-4724 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Operating with a high frequency and a wave guide antenna, the ion Bernstein wave (IBW) experiment on the Frascati Tokamak Upgrade is not dominated, as expected, by nonlinear plasma edge phenomena. By coupling IBW power, a simultaneous increase of plasma density and central electron temperature (≥2 keV) is produced when the confinement magnetic field is adjusted to set an ion cyclotron resonant layer in the plasma bulk. Transport analysis indicates a reduction of the electron thermal transport inside the internal resonant layer larger than a factor of 2. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1408912
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  • 3
    Electronic Resource
    Electronic Resource
    Fe i density measurements by laser induced fluorescence spectroscopy : Proceedings of the tenth topical conference on high temperature plasma diagnostics (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 597-599 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The density of Fe atoms produced by bombardment of a stainless steel target by Ar+ ions was measured by laser induced fluorescence (LIF) using a tunable dye laser. The excitation transition involved was a 5D4→y 5D04 (λ=302.064 nm); measurements of the fluorescence signal, from the y 5D04→a 5F5 decay (λ=382.043 nm), were made by varying the laser power incident on Fe atoms by means of grey filters. An absolute calibration of the detection system allowed the determination of the number of the emitting atoms, versus the incident power. So the experimental curve of the fraction of total pumped atoms versus the saturation parameter was obtained. On the other hand, that fraction can be calculated by using standard rate equations for LIF process involving three level atoms. The result is strongly dependent on the model for the pumping laser pulse, particularly (as expected) at low incident power level. Assuming a realistic Gaussian temporal dependence for the radiation field energy flux at frequency v, i.e., U (vt) ∼ Uv0te−t2 and calculating the fraction of atoms pumped by the incident pulse, an agreement better than assuming a square time dependence for U(v,t) was found. The measurement sensitivity limit is 109 atoms/cm3 when LIF diagnostic on FTU is considered including plasma emission background. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146298
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  • 4
    Electronic Resource
    Electronic Resource
    MoI density measurements by laser induced fluorescence spectroscopy : Proceedings of the 12th topical conference on high temperature plasma diagnostics (1999)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 70 (1999), S. 921-924 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The density of molybdenum atoms produced by sputtering of a TZM (molybdenum) target by Ar+ ions is measured by laser induced fluorescence (LIF) using tunable dye laser. The excitation transition involved is a7S3−z5P30 at 345.64 nm, while the fluorescence signal is from the decay z5P30−a5S2 at 550.6 nm. The LIF measurements are carried out by varying the laser power incident on Mo atoms by means of neutral density filters. An absolute calibration of the detection system together with the realization of a well defined optical probe volume allows for the determination of the density of the emitting atoms. An evaluation of LIF diagnostic performance on Frascati Tokamak upgrade put a lower limit of 2.5×1014 atoms/m3 on the detectable local density of MoI close to the toroidal limiter. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1149440
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  • 5
    Electronic Resource
    Electronic Resource
    Measurements of ZEFF spatial profiles from bremsstrahlung emission in the visible and near infrared spectral region : Proceedings of the eleventh topical conference on high temperature plasma diagnostics (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 1024-1026 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Measurement of plasma radiation (i.e., breusstrahlung) in the infrared (IR) range (λ=933, 978 nm), at six lines of sight from z=−20 cm to z=8 cm above the equatorial plane, using the detection system of the Frascati Tokamak Upgrade (FTU) Thomson scattering system (TSS) are reported. The agreement of IR with visible (λ=540 nm) bremsstrahlung intensity S, [S=photons/(m2 sr nm s)] measurements is within 20%–30% and depends upon the absolute calibration of both systems. The intensity is equal S(z)=〈ZeffGn2/Te1/2〉, where 〈⋅〉 means average on a line of sight. For determining the Zeff the Gaunt factor(G) is needed, and analysis the Born–Elwert formula is used. The Zeff spatial profiles (i.e., Zeff(r)), are determined using the plasma temperature (Te) and density (ne) measured by the TSS and the Abel inverted intensity profiles, determined using the plasma radiation S(z) measured from six horizontal chords. Zeff(r) behavior in a variety of FTU discharges is presented. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147776
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