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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Ground water monitoring & remediation 13 (1993), S. 0 
    ISSN: 1745-6592
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Geosciences
    Notes: Cleanup standards for volatile organic compounds in thick vadose zones can be based on indirect risk (transport to ground water) when contamination is below depths of significant direct risk. At one Arizona Superfund site, a one-dimensional vadose zone transport model (VLE-ACH) was used to estimate the continued transport of VOCs from the vadose zone to ground water. VLEACH is a relatively simple and readily available model that proved useful for estimating indirect risk from VOCs in the vadose zone at this site. The estimates of total soil concentrations used as initial conditions for VLF.ACH incorporated a variety of data from the site. Soil gas concentrations were found to be more useful than soil matrix data for estimating total soil concentrations at this arid-zone site. A simple mixing cell model was used with the VLEACH-derived mass loading estimates from the vadose zone over time to estimate the resulting changes in ground water concentrations. For this site, the results of the linked VLEACH/mixing cell simulations indicate it is likely that the federal MCI. for TCE will be exceeded in underlying ground water if remedial action on I he vadose zone is not pursued.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 131 (1993), S. 133-137 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Crystal Growth 128 (1993), S. 122-126 
    ISSN: 0022-0248
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1435-2451
    Keywords: Karpaltunnelsyndrom ; Kaninchen ; Athoxysklerol ; Chronische Nervenkompression
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary In order to create an experimental model for the carpal tunnel syndrome without the use of the commonly applied foreign bodys (silicone or rubber tubes, tourniquets etc.), the present study tried to induce a chemically provoked compression of the median nerve in rabbits. In 9 female rabbits 1 ml of Aethoxskerol® 3% (Hydrox-polyethoxy dodecan) was instilled into the carpal tunnel around the median nerve after visualisation of the nerve. The other foreleg served as the control and was treated with the same amount of saline solution. Electroneurophysiologic parameters were registered preoperatively, 1 month and 6 months post surgery and histomorphologic investigations by light and electron microscopy were performed after 6 months. 6 months after treatment with Aethoxysklerol®, a statistically significant lenghtening of the distal latency period as well as a significant reduction of the compound potential amplitude could be observed. In accordance with these findings, morphological investigation revealed the presence of extensive granulation tissue around the median nerve together with signs of demyelination. Our results indicate that we were able to produce the development of extensive granulation tissue in the carpal tunnel of rabbits with subsequent compression of the median nerve which was confirmed by histomorphologic investigation as well as by measurement of nerve conductive velocity.
    Notes: Zusammenfassung Die vorliegende Studie versuchte eine chemisch induzierte, chronische Kompression des N. medianus in einem experimentellen Kaninchenmodell, ohne Verwendung der bis dato implantierten Fremdkörper (Silikon-oder Gummischläuche, Tourniquets, etc.) zu verursachen. Nach Darstellung des N. medianus wurde bei neun weiblichen Kaninchen 1 ml Äthoxysklerol® perineural im Karpalkanal instilliert. Die andere vordere Extremität diente als Kontrolle und wurde mit der gleichen Menge Kochsalzlösung behandelt. Elektroneurophysiologische Parameter wurden präoperativ, 1 und 6 Monate nach dem Eingriff bestimmt, histomorphologische Untersuchungen mittels Licht- und Elektronenmikroskopie wurden nach 6 Monaten durchgeführt. 6 Monate nach Behandlung mit Äthoxysklerol® fand sich eine signifikante Verlängerung der distalen Latenzzeit sowie eine signifikante Erniedrigung der Summenpotentialamplitude. In Übereinstimmung mit diesen Befunden zeigte sich morphologisch überschieβendes Granulationsgewebe um den N. medianus mit Zeichen der Demyelinisierung. Unsere Ergebnisse zeigen, daβ wir die Entstehung von Granulationsgewebe im Karpalkanal von Kaninchen provozieren konnte, welche mit einer nachfolgenden Nervenkompression einherging. Diese Veränderung manifestierte sich sowohl histomorphologisch als im Rahmen der Nervenleitgeschwindigkeit.
    Type of Medium: Electronic Resource
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