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  • 1995-1999
  • 1980-1984  (3)
  • 1965-1969
  • 1981  (3)
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  • 1995-1999
  • 1980-1984  (3)
  • 1965-1969
Year
Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Injection electroluminescence from CdTe p-n junctions prepared by LPE (1981)
    Springer
    Applied physics 26 (1981), S. 151-156 
    Details
    ISSN: 1432-0630
    Keywords: 78.60.Fi ; 73.40.Lq ; 81.10.Dn
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract CdTep-n junction diodes were prepared by LPE using CdCl2 as a solvent. Excess cadmium was added to the CdCl2-CdTe solution. Capacitance-voltage characteristics show that the diode structure is ofp-i-n type. Injection electroluminescence spectra reveal that radiative transitions occur mainly in thep-type region; relevant recombination centers are discussed in connection with those in a previous paper on the photoluminescence of CdTe:P crystals. Temperature dependences of the electroluminescence spectra were explained taking into account a change in sites where electrons radiatively recombine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00614749
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hyperphenylalaninemia due to impaired dihydrobiopterin biosynthesis (1981)
    Springer
    European journal of pediatrics 136 (1981), S. 275-280 
    Details
    ISSN: 1432-1076
    Keywords: Atypical PKU ; Deficiency of dihydrobiopterin ; Neurotransmitter treatment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract A fourteen month-old boy with atypical phenylketonuria was treated with 5-hydroxytryptophan, L-dopa and peripheral aromatic amino acid decarboxylase inhibitor (Ro 4-4602:benserazide). Despite the good control of plasma phenylalanine on a low phenylalanine diet, he had shown no improvement in his development but progressive neurological symptoms, such asiirritability, convulsions and decrease voluntary movement. After beginning neurotransmitter therapy, his irritability disappeared promptly and the other symptoms diminished. He gradually reached his developmental milestones. At two and a half years of age, he had recovered sufficiently to be able to walk freely on treatment with 13 mg/kg/day of 5-hydroxytryptophan, 11 mg/kg/day of L-dopa and 2.7 mg/kg/day of benserazide in combination with slight restriction of phenylalanine intake (100 mg/kg/day). Levels of serotonin and 5-hydroxyindoleacetic acid were low in the patient's CSF. His urinary biopterin (Crithidia factor) excretion was low. An increase in serum biopterin following L-phenylalanine loading was not found. Dihydropteridine reductase activity in his skin fibroblasts was normal. He excreated large amounts of erythro- and threo-neopterins (but only a trace of biopterin) in his urine. After loading with phenylalanine the urinary excretion of neopterins was even more enhanced, but biopterin remained at low levels. These findings indicated that the patient has a dihydrobiopterin synthetase deficiency.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00442994
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Endoscopic and histopathological study on primary and secondary intestinal lymphangiectasia (1981)
    Springer
    Digestive diseases and sciences 26 (1981), S. 312-320 
    Details
    ISSN: 1573-2568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Jejunal endoscopy and histopathological study of biopsied specimens were performed to clarify states of jejunal mucosa and the mechanism of enteric protein loss in six patients with protein-losing enteropathy, including four patients with intestinal lymphangiectasia, one patient with constrictive pericarditis associated with dilated lymphatics of the intestine, and one patient with Budd-Chiari syndrome. Three cardinal endoscopic findings, scattered white spots, white villi, and chyle-like substances covering the mucosa, were demonstrated in protein-losing enteropathy. Scattered white spots indicated markedly dilated lymphatics in the stroma of the villi. White villi seemed to be due to fats including chylomicrons or fat droplets in the absorptive cells, interepithelial spaces, and/or stroma, even though the biopsies were obtained in the fasting state. Therefore, white villi suggest impaired transport of fats from intestinal epithelial cells to intestinal lymphatics. These three cardinal findings are thought to be characteristic for protein-losing enteropathy secondary to lymphatic disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01308371
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    Paper (German National Licenses)
    Fulltext
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