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  • Organic Chemistry  (24)
  • Avoiding technical errors  (1)
  • Diagnostik  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Langenbeck's archives of surgery 354 (1981), S. 89-100 
    ISSN: 1435-2451
    Keywords: Peripheral vascular surgery ; Intraoperative arteriography ; Detecting complications ; Immediate occlusion ; Avoiding technical errors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Zusammenfassung Die intraoperative Angiographie wurde bei 307 Operationen (Thrombendarteriektomie (TEA)n =107 = 34,8 %; Venenbypass (VBP)n = 145 = 47,2 %; Kunststoffbypass (KBP)n = 44 = 14,4 %, zusammengesetzte Rekonstruktionenn = 11 = 3,6 %) wegen chronisch obliterierender Arteriopathie im femoro-poplitealen und cruralen Bereich angewendet. Die kumulative Korrekturrate betrug 11, 7% (TEA: 18, 6%, VBP: 8,2%, KBP:6,8%); Fehler waren am häufigsten nach TEA gefolgt von VBP und KBP. Revisionen nach Sofortverschluß (SFV) verliefen in 7,4 % erfolgreich (TEA: 8,4 %; VBP: 5,5 %, KBP: 6,8 %). Bei technisch einwandfreiem Angiogramm gelangen Korrekturen in 13,1 % nicht (TEA: 11,2 %; VBP: 13,8 %; KBP: 13,6 %). Röntgenbefunde fraglicher Wertigkeit wurden in 6,8 % akzeptiert, 4 Sofortverschlüsse wurden gezählt (1,7%). In 3,6% der Fälle war das Arteriogramm technisch nicht einwandfrei. Die intraoperative Kontrollangiographie wird auf Grund der vorliegenden Erfahrung als wertvolles Hilfsmittel zur Qualitätskontrolle gefäßrekonstruktiver Eingriffe empfohlen. Technische Fehler können entdeckt und sofort behoben werden.
    Notes: Summary The intraoperative angiography was employed in 307 vascular reconstructive procedures (thrombendarterectomies (TEA)n = 107 = 34.8 %; Veinbypass (VBP)n = 145 = 47.2 %; fabric grafts (KBP)n = 44 = 14.4 %) within the femoro-popliteal and crural region. 11.7% unsuspected technical errors were detected (TEA 18.6 %; VBP 8.2 %; KBP: 6.8 %) by angiography and sucessfully revised prior to wound closure. Errors were most common after thrombendarterectomies followed by VBP and KBP. Revisions after immediate failures were performed successfully in 7.4 % (TEA: 8.4 %, VBP : 5.5 %, KBP: 6.8 %). Lesions on X-ray of questionable significance were accepted in 6.8%, and followed by 4 immediate occlusions (1.7%). In 3.6% of the angiogramms the film was not satisfactorily exposed from the technical point of view. We think intraoperative angiography is a valuable adjunct in peripheral vascular surgery helping to detect and correct technical errors.
    Type of Medium: Electronic Resource
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  • 2
    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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  • 3
    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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  • 4
    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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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 40 (1957), S. 467-476 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparation of 4-(p-phenylazophenyl)-semicarbazones in organic solutions and in highly diluted aqueous solutions has been described, as well as the separation and the identification of mixtures of these derivatives by chromatographic methods. Aldehydes and ketones form in good yield highly coloured 4-(p-phenylazophenyl)-semicarbazones. These can be useful in analytical investigations. Some ketones do not react easily and their 4-(p-phenylazophenyl)-semicarbazones are unstable under the mentioned chromatographic conditions. Jasmone gives no reaction at all.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Helvetica Chimica Acta 44 (1961), S. 271-278 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The aldehydes corresponding to the alkylidene-bis-(5,5-dimethyldihydroresorcinols) are regenerated by hydrolytic scission in a weakly alkaline medium (pH 8-9,5).
    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 46 (1963), S. 1792-1797 
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The authors describe a new general synthesis of cis-β-ethylene aldehydes: the alkylation of 1-methoxy-1-buten-3-yne to 1-methoxy-1-alken-3-ynes followed by addition of methanol produces 1,1-dimethoxy-3-alkynes. The catalytical reduction of these compounds to 1,1-dimethoxy-3-alkenes followed by mild acidic hydrolysis yields cis-β-ethylene aldehydes.
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Pyrazines and pyridines occurring in a coffee concentrate are analyzed by two procedures. 24 compounds have been identified and the presence of some 10 more is revealed. The syntheses, mass and infrared spectral data of reference compounds are given.
    Additional Material: 6 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: A process for the removal of volatile flavor constituents directly from the fruits and the further concentration of the separated fruit flavor are described.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 0018-019X
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1Preliminary investigations of raspberry oil have shown that carbonyls and alcohols are the most characteristic constituents.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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