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  • Analytical Chemistry and Spectroscopy  (1)
  • Key words Vallecular cyst  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of pediatrics 159 (2000), S. 79-81 
    ISSN: 1432-1076
    Keywords: Key words Vallecular cyst ; Neonate ; Infant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Vallecular cyst, a rare but generally benign lesion in the larynx, may cause stridor and even life-threatening airway obstruction in early infancy. We retrospectively studied 14 cases of newborn infants with vallecular cyst. There was no gender predilection and most cases were full-term and appropriate for gestational age. The clinical presentations included stridor, chest wall retraction, feeding difficulties and failure to thrive. Laryngomalacia was the most common associated anomaly. Flexible laryngoscopy was sufficient for diagnosing the vallecular cyst and larygmalacia. Maintenance of airway patency, nutritional support, and de-roofing of the cyst were the mainstays of management. Conclusion Vallecular cyst should be included in the differential diagnosis of stridor in newborn infants. Respiratory and feeding difficulties in these patients can be dramatically improved after appropriate surgical removal of the cyst.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 17 (1981), S. 290-295 
    ISSN: 0030-4921
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Natural abundance proton-coupled 15N NMR spectra have been observed for pyridine and a series of mono- and disubstituted pyridines using polarization transfer achieved by the selective population transfer method. The magnitudes and signs of the 15N—1H spin-spin coupling constants between the ring-nitrogen and ring-protons are determined from complete iterative spectral analysis and/or selective population transfer experiments. Substituent effects on the 15N—1H coupling constants are discussed and compared with those for 13C—1H couplings in substituted benzenes.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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