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  • 1
    ISSN: 0039-9140
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Analytica Chimica Acta 90 (1977), S. 137-141 
    ISSN: 0003-2670
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1433-0423
    Keywords: Schlüsselwörter Karzinoid ; Orbitametastase ; Oktreotidszintigraphie ; Key words Carcinoid tumor ; Orbital metastasis ; Octreotide scintigraphy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary Background: An orbital carcinoid metastasis can be specifically imaged by octreotide scintigraphy. Orbital metastases of carcinoid tumors are rare. In the current literature only 27 cases have been published. Case report: We report on a 59 year-old woman who presented with diplopia 6 years after resection of a carcinoid tumor of the ileum. She also complained about flush and diarrhea. The diplopia was caused by limited extensibility of the right inferior muscle. Computed tomography with contrast revealed an enhancing tumor in the area of the right inferior rectus muscle, which appeared in the MRT as an isointense structure in the T1-weighted image. On staging, we found a contrast-enhancing nodular hepatic lesion. In octreotide scintigraphy, enhancement of the liver, thoracic and abdominal para-aortic lymph nodes and of the right inferior orbit was found. Conclusion: The survival times of patients with orbital metastasis of carcinoid tumors range between 7 months and 11 years. No specific treatment is available. Surgical excision is indicated for a symptomatic solitary metastasis. Octreotide is helpful in two ways: (1) as a radiolabeled tracer to detect extra-abdominal and extrahepatic secondary tumors; (2) as a treatment modality for flush and diarrhea, which is successful in over 60% of patients (life expectancy uninfluenced). Our patient is presently being treated with 200 μ of octreotide three times a day subcutaneously. Flush episodes and diarrhea have been reduced, but her ophthalmologic symptoms remain unchanged, and she has recently developed cardiac insufficiency.
    Notes: Zusammenfassung Hintergrund: Orbitametastasen von Karzinoidtumoren sind selten. Die Überlebensdauer von Patienten mit Orbitametastasen eines Dünndarmkarzinoids beträgt nach Literaturangaben zwei Jahre. Eine kausale Therapie ist nicht möglich. Ziel der Arbeit: Anhand eines Falles soll die Bedeutung von Oktreotid bei diesem Krankheitsbild dargestellt werden. Kasuistik: Es wird die Krankengeschichte einer 59-jährigen Patientin mit Doppelbildern 6 Jahre nach Resektion eines Dünndarmkarzinoids beschrieben. Im Staging konnten mittels MRT und CT eine Orbitametastase rechts und Lebermetastasen nachgewiesen werden. In der Oktreotidszintigraphie fanden sich darüber hinaus paraaortal Lymphknotenmetastasen und die Orbitametastase rechts wurde bestätigt. Die Behandlung mit Oktreotid führte zu einer Besserung der Symptome Flush und Diarrhoe. Schlußfolgerung: In der Diagnostik von Karzinoidtumoren ist die Szintigraphie mit dem Somatostatin-Analogon Oktreotid für die Lokalisation von extrahepatischen und extraabdominellen Metastasen CT und Ultraschall überlegen. Die Oktreotidszintigraphie kann helfen, die Verdachtsdiagnose Orbitametastase eines Karzinoids zu erhörten. Oktreotid stellt ein wirksames Mittel zur Behandlung der Flush-Symptome und der Diarrhoe dar. Die Prognose quoad vitam wird davon nicht beeinflußt.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 79 (1983), S. 263-272 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Summary The combination of a combustion unit equipped with an automated sample feeder and relativ-conductometric analyzers for ambient SO2 and CO2 determination enables routine determinations of carbon and sulphur in airborne particulate samples. One analysis requires 12 min, series of 40 samples can be analyzed without attendance. Practical limits of determination were 0,6μg C and 0,06μg S including blanc values from aerosol collection media. The procedure was tested for accuracy and interfering species with a standard aerosol sample and test samples. Aerosol samples collected with cascade impactors and “Low Volume”-filter samplers of 25–250μg were analyzed with good reproducibility (relative standard deviation 1,7–5%).
    Notes: Zusammenfassung Das Analysatorsystem zur automatischen Bestimmung von Kohlenstoff und Schwefel in Stäuben und Aerosolen wird durch Kombination eines mit einem automatischen Probenwechsler ausgestatteten Verbrennungsteils mit 2 relativkonduktometrischen Analysatoren zur CO2- und SO2-Immissionsmessung gebildet. Der Zeitbedarf für eine Analyse beträgt 12 min, Serien von 40 Proben können unbeaufsichtigt analysiert werden. Die praktische Nachweisgrenze für die Analyse von Aerosolproben liegt einschließlich der durch den Blindwert des Trägermaterials verursachten Streuung bei 0,6μg C und 0,06μg S. Mit Testsubstanzen und einer Standardstaubprobe wurden Querempfindlichkeiten und Richtigkeit der Methode untersucht. Der Einsatz des Analysators zur Analyse von mit Kaskadenimpaktoren und Kleinfiltergeräten gesammelten Aerosolproben zeigte, daß Probemengen von 25–150μg mit sehr guter Reproduzierbarkeit (rel. Standardabweichung 1,7–5%) bestimmt werden können.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Microchimica acta 68 (1977), S. 325-330 
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Anwendung eines einfachen, schnellen und reproduzierbaren potentiometrischen Verfahrens zur Bestimmung von Bromiden und Chloriden in Stauben wurde beschrieben. Der Einsatz einer Motorkolbenbürette für die relativpotentiometrische Titration und die Verwendung eines Differentiators erlauben eine exakte Bestimmung des Titrationsendpunktes und ermöglichen so das gute Auflösungsvermögen des Verfahrens. Die Methode wurde routinemäßig in der Umweltanalytik eingesetzt.
    Notes: Summary A simple, rapid and reproducible potentiometric titration method for determination of both bromide and chloride in airborne dust is described. The use of a precise microburette and a differentiating recorder allows good resolution of the two species determined. The method can be easily applied for routine environmental control analysis.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-069X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The transition metals ions Cr(III), Mn(II), Fe(III), Co(II), Ni(II), and Zn(II) in addition to Ca(II) have been used as modifiers in the determination of silicon using electrothermal Zeeman atomic absorption spectrometry. Co(II) proved to be the best. Graphite tubes treated with zirconium, in the presence of Co(II) as a modifier, exhibit higher sensitivity by a factor of five than untreated tubes. The modifier concentration and ashing and atomization temperatures have been optimized. Also interference of different inorganic cations and anions was studied.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' journal of analytical chemistry 360 (1998), S. 723-725 
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An on-line system for the continuous ethylation of selenium (IV) in combination with trapping and detection of the produced diethylselenide in the coated AAS graphite furnace was developed. Due to the slow kinetics of the ethylation the volume of the reaction coil and the reaction time had to be increased to 5.5 mL and 80 s, respectively. The sensitivity of the method was comparable with that of the hydride generation in the same system and the relative standard deviation was 6–10%. The determination of Se(IV) in real samples after the most widely used digestion with nitric acid could not be accomplished, because of the drastic signal depression caused by this acid.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract  Three AAS-methods for the determination of selenium at trace levels were validated and compared on the basis of their performance characteristics. It was observed that the sensitivity of determination of selenium increases from ET-AAS over FI-HG-AAS to HG-ET-AAS by a factor of 40, respectively 100. Moreover HG-ET-AAS exhibits extremely low detection limits enabling the determination of selenium in the ng/l-range. On the basis of recovery experiments, calibration by standard addition and analyses of reference materials matrix effects were not only evaluated (ET-AAS) but also eliminated (FI-HG-AAS).
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 258 (1972), S. 363-364 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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