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  • Electronic Resource  (26)
  • Chemistry  (24)
  • 36.40. + d  (1)
  • Congenital heart defect  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Monatsschrift Kinderheilkunde 146 (1998), S. 93-96 
    ISSN: 1433-0474
    Keywords: Schlüsselwörter Williams-Beuren-Syndrom ; Entwicklungsverzögerung ; Nierenfehlbildung ; Herzfehler ; Kleinwuchs ; Key words Williams-Beuren syndrome ; Mental retardation ; Renal malformation ; Congenital heart defect ; Short stature
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Williams-Beuren syndrome is a multiple malformation syndrome with autosomal dominant inheritance and variable expression. Characteristic symptoms are congenital heart defects (typically supravalvular aortic stenosis in combination with peripheral pulmonary stenoses), primary psychomental retardation, distinct facial features, malformations of the kidney or urinary tract, failure to thrive and gastrointestinal symptoms in infancy and early childhood, and short stature (50% of patients). We report on a young man with Williams-Beuren syndrome in whom the dignosis was made late at the age of 24 years. During infancy poor suckling and recurrent vomiting were noted. Psychomental development was retarded. The patient showed a hypersensitivity to noise and music. Renal scarring was seen on the right side and a duplicated ureter on the left. Surgical antireflux treatment was performed at age 12 years. The patient attended a school for mentally handicapped children and is now working with an institutionalized group. At the age of 24 the typical facial features of an adult with Williams-Beuren syndrome were seen, but no congenital heart defect. By molecular genetic analysis we demonstrated hemizygosity for the elastin locus and thus confirmed the clinical diagnosis of Williams-Beuren syndrome. Discussion: This observation demonstrates that the diagnosis of Williams-Beuren syndrome may be markedly delayed in the absence of a cardiovascular defect. The combination of typical craniofacial signs, primary mental and psychomotor retardation, poor suckling and gastrointestinal symptoms in infancy and early childhood, and malformations of the kidneys and/or the urinary tract should prompt consideration of Williams-Beuren syndrome.
    Notes: Zusammenfassung Das Williams-Beuren-Syndrom wird mit variabler Expressivität autosomal-dominant vererbt. Es ist charakterisiert durch den typischen Herzfehler, die supravalvuläre Aortenstenose, welche häufig mit peripheren Pulmonalstenosen kombiniert ist. Weitere charakteristische Symptome sind die primäre psychomentale Retardierung, die typische kraniofaziale Dysmorphie und Fehlbildungen der Nieren oder ableitenden Harnwege. Im Säuglings- und Kleinkindesalter treten Gedeihstörung sowie gastrointestinale Auffälligkeiten wie rezidivierendes Erbrechen und Durchfälle auf. 50% der Patienten sind kleinwüchsig. Wir berichten über einen jungen Mann mit Williams-Beuren-Syndrom, bei dem diese Diagnose erst im Alter von 24 Jahren gestellt wurde. In der Säuglingszeit bestanden Trinkschwäche und rezidivierendes Erbrechen. Die psychomentale Entwicklung verlief primär verzögert. Anamnestisch wurde von einer ausgeprägten Geräuschempfindlichkeit und einem guten Musikempfinden berichtet. Es bestehen eine Schrumpfniere rechts und ein gedoppeltes Nierenbecken links. Im Alter von 12 Jahren wurde eine Antirefluxplastik durchgeführt. Der Patient besuchte die Sonderschule L und arbeitet jetzt in einer beschützenden Werkstatt. Mit 24 Jahren zeigte der Patient die charakterisitische kraniofaziale Dysmorphie eines Erwachsenen mit Williams-Beuren-Syndrom. Ferner fiel sein für das Syndrom typisches freundlich zugewandtes Verhalten auf. Eine primäre kardiovaskuläre Fehlbildung konnte allerdings ausgeschlossen werden. Die Diagnose wurde durch den molekulargenetischen Nachweis der Hemizygotie für den Elastinlocus bestätigt. Diskussion: Dieser Fall belegt eindrücklich, daß die Diagnosestellung bei Patienten mit Williams-Beuren-Syndrom, die nicht den typischen Herzfehler aufweisen, trotz einer ansonsten pathognomonischen Befundkonstellation stark verzögert sein kann. Die Kombination aus typischer kraniofazialer Dysmorphie, primärer statomotorischer und mentaler Retardierung, unerklärter Trinkschwäche und rezidivierendem Erbrechen mit Gedeihstörung sollte auch ohne zusätzliche Fehlbildungen im Bereich von Nieren und ableitenden Harnwegen an die Diagnose Williams-Beuren-Syndrom denken lassen.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    The European physical journal 31 (1994), S. 291-297 
    ISSN: 1434-6079
    Keywords: 36.40. + d ; 34.80.Gs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The fragmentation behaviour of size selected neutral (D2O) n clusters withn≦4 after ionization with 70 eV electrons is subject of this work. Size selection by scattering the cluster beam from a He target beam in combination with a quadrupole mass filter and time resolved measurements at specific laboratory angles enables us to determine the neutral precursor masses of the detected ions. The measured fragment pattern is dominated by deuterated ions of the form (D2O) n−x D+ withx≧1. The dimer fragmentation which leads with a probability of 62.5% to the D3O+ ion and with 37.5% to D2O+ can be explained by fast intracluster ion-molecule reactions of charged monomer fragments reacting with the partner molecule. For larger clusters the fragmentation process can be rationalised by the creation of an initially highly excited D3O+ (D2O) x complex which is stabilized by evaporating additional monomer units with the main fragment channel (D2O)D+ forn=3 and (D2O)2D+ forn=4. With increasing cluster size an increasing tendency of evaporation of more than one water monomer unit has been observed.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 43 (1960), S. 1120-1121 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The isolation and identification of Geraniol in the oil of raspberries is described.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The 3,5-dinitrobenzoates obtained from the neutral part of the vacuum distillates of 610 kg of fresh raspberries have been separated and examined by column and paper chromatography. The identification of 11 alcohols is described, four of which were known to be present in raspberries: cis-3-hexen-1-ol, 1-hexanol, ethanol, methanol; seven are new: 3-methyl-3-buten-1-ol, 1-penten-3-ol, 1-pentanol, trans-2-buten-1-ol, 1-butanol, 3-methyl-3-buten-1-ol, and geraniol; the identification of the last two has already been described in preliminary notes.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 2567-2575 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The syntheses of pure cis- and trans-3-hexenal are described. It is shown that earlier reported preparations of 3-hexenal or β-hexenal led in most cases to the isomeric 2-hexenal.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 1250-1255 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The isolation of a new lactonic component from jasmine waxes and jasmine oil is described. This odoriferous compound is shown to be (-)-cis-5-pent-2′-enyl-pentanolide-(5,1).
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 45 (1962), S. 1256-1261 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A synthesis of racemic jasmine lactone, viz. cis-(5-pent-2-enyl)-pentanolide-(5,1), is described.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 46 (1963), S. 1749-1754 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: β-Hexynal and some of its derivatives have been prepared.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: More than twenty examples illustrate the recently developed oxidoketone-alkynone-fragmentation, whereby α,β-epoxy-ketones are cleaved under mild conditions with p-toluenesulfonyl-hydrazine to give acetylenic ketones or aldehydes.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 54 (1971), S. 1891-1898 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The neutral fraction of medium volatility from raspberry oil has been analysed by gas chromatography and mass spectrometry. From the large number of constituents thirtynine have been identified, 24 of them for the first time, including dihydro-β-ionone (I), epoxy-β-ionone (II), damascenone (III)1, theaspirane (IV) and 2-hexen-4-olide (V). According to these results raspberry oil consists mainly of alcohols, ketones, aldehydes and lactones.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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