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  • 1980-1984  (2)
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  • 1
    Digitale Medien
    Digitale Medien
    Dihydrobiopterin biosynthesis deficiency (1983)
    Springer
    European journal of pediatrics 141 (1983), S. 92-95 
    Details
    ISSN: 1432-1076
    Schlagwort(e): Hyperphenylalaninemia ; Biopterin ; Tetrahydrobioterin deficiency
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract For the last 2 years, a program has been developed to screen all hyperphenylalaninemic babies for tetrahydrobiopterin deficiency, by measurement of pterins in urine. High neopterin and low biopterin levels were found in the urine of a 1-month-old girl. Further investigations confirmed an impaired conversion of neopterin to biopterin. No neurological signs were noted, but, in regard to the laboratory data, neurotransmitter replacement therapy was instituted at 2.5 months of age. The most remarkable feature was a rapid increase in the dietetic phenylalanine tolerance, despite the proof that the child was not able to clear a challenging dose of phenylalanine and the record of unchanged pathologically low excretion of biopterin during a 2 month period.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00496797
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    The thermal-neutron-induced alpha-accompanied fission of235U investigation of the low energy part of the alpha spectrum (1980)
    Springer
    The European physical journal 298 (1980), S. 219-223 
    Details
    ISSN: 1434-601X
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The energy spectrum of the α-particles emitted in the thermal-neutron induced fission of235U was measured from 11.5 MeV down to 2 MeV using the parabola mass spectrometer Lohengrin at the I.L.L. high flux reactor. This low energy part of the energy spectrum presents a smooth connection with the energy spectra which have been recently reported above 7 MeV. The overall energy spectrum, which is known to be quasi-gaussian above 12 MeV, is slightly asymmetric at low energy, where the observed particles are 6% more than expected from a gaussian shape. As a consequence, all the values reported for235U for the rate of α-accompanied fission compared to binary fission have to be multiplied by 1.06. This asymmetry is about 2 times less important than the one reported for252Cf. No evidence was seen for any intense low energy component as reported before. The possible reasons for the existence of this asymmetry are discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01418660
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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