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  • 1
    ISSN: 1433-0458
    Keywords: Schlüsselwörter Halslymphknoten ; Diagnostik ; Farbkodierte Duplexsonographie ; B-Scan-Sonographie ; Key words Color-coded duplex sonography ; Cervical lymph nodes ; Differential diagnosis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Color-coded duplex sonography is being increasingly used in the head and neck as another method for diagnosis of such disorders as stenosis of arteries or veins or hemangiomas. A possible additional advantage of testing is the ability to differentiate benign from malignant tumors. Since the underlying cause of a suspicious lesion is most important for treatment strategies, we investigated histologically-proven benign and malignant cervical lymph nodes for determining the value of color-coded duplex sonography. In the present study, 135 patients (45 women and 90 men; ages 30–63 years) with palpable cervical lymph nodes were examined with both ultrasound and color-coded duplex sonography. Afterwards, lymph nodes were removed by open biopsies or neck dissections. The histological results were then compared to perfusion velocities and pulsation indices from the color-coded duplex sonography. However, no significant differences were found between the benign and malignant nodes. When comparing perfusion and color, each group was seen to be non-homogeneous and no typical distribution of vascularization was demonstrable. Findings showed that color-coded duplex sonography is currently not an accurate indicator of lymph node pathology.
    Notes: Zusammenfassung Hintergrund: Eine sichere Beurteilung der Gewebeerkrankung von Halslymphknotenschwellungen ist mit Hilfe der B-Scan-Sonographie nicht möglich. Mit der farbkodierten Duplexsonographie steht heute eine Untersuchungsmethode zur Verfügung, die Aussagen über die Echogenität sowie die Gefäßversorgung der untersuchten Areale liefert. Im Rahmen einer prospektiven Studie sollte geklärt werden, ob farbdopplersonographische Befunde Rückschlüsse auf die Dignität von Halslymphknoten erlauben. Patienten: Untersucht wurden 135 nicht therapierte Patienten (45 Frauen, 90 Männer, Alter 30–63 Jahre) mit Halslymphknotenschwellungen bislang ungeklärter Histologie. Methoden: Eingang in die Studie fanden Halslymphknoten, die sowohl palpatorisch (um eine spätere Identifikation im Neck-Präparat zu ermöglichen) als auch im B-Scan sonographisch nachweisbar waren und anschließend operativ entfernt wurden. Alle Patienten wurden präoperativ zuerst B-scan-sonographisch beurteilt. Sodann erfolgte die farbdopplersonographische Untersuchung. Die sonographischen und farbdopplersonographischen Befunde wurden dem histologischen Untersuchungsergebnis gegenübergestellt. Ergebnisse: Vergleichend ausgewertet wurden 80 Patienten mit histologisch gesicherten Plattenepithelkarzinommetastasen und 55 Patienten mit histologisch verifizierten akuten bzw. chronischen Lymphadenitiden. Hinsichtlich der Messung von Pulsatilitätsindizes imponierte kein signifikanter Unterschied zwischen benignen und malignen Knoten. Plattenepithelkarzinommetastasen und Lymphadenitiden zeigten bezüglich der qualitativen Farbverteilungsspektren lediglich unspezifische Vaskularisationsmuster. Schlußfolgerung: Die farbkodierte Duplexsonographie in der HNO-Heilkunde ist zum gegenwärtigen Zeitpunkt nicht geeignet, quantifizierbare Hinweise zur Dignität und/oder Spezifität von Halslymphknoten zu geben.
    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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