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  • 1980-1984  (7)
  • 1970-1974
  • 1920-1924
  • 1983  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Geophysical prospecting 31 (1983), S. 0 
    ISSN: 1365-2478
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Physics
    Notes: The suitability of VLF ground surveys in the investigation of shallow two-dimensional structures is analyzed. For such structures the polar formalism is derived, necessary in practice since the transmitters are generally not in the structural strike or profile. A simple vertical dike is considered to demonstrate the striking anisotropy which can be expected over such a structure, in particular the high apparent resistivity along the direction of a well-conducting dike and the low resistivity across it. The theory is then confronted with the practical example of an asymmetrical vertical dike resulting from a strike-slip fault. Modelling of the survey results is very successful and yields good confirmation of the polar behaviour. VLF ground surveys thus provide a quick and powerful tool for the study of geological accidents within about 100 m of the surface.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Phytopathology 21 (1983), S. 13-20 
    ISSN: 0066-4286
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Biology
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Journal of cancer research and clinical oncology 106 (1983), S. 53-57 
    ISSN: 1432-1335
    Keywords: Methapyrilene ; Liver tumor ; Preneoplasia ; Adenosine-5-triphosphatase ; γ-Glutamyltranspeptidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The antihistaminic drug methapyrilene hydrochloride, which induces liver tumors in rats, was administrated orally to female Wistar rats. The animals were killed after 21, 38, 77, 119, 181, and 196 days. The activities of adenosine-5-triphosphatase (ATPase) and γ-glutamyltranspeptidase (γ-GT) in the liver were investigated histochemically. At 21 days, a homogeneous decrease of ATPase activity as well as a slight increase of γ-GT activity was found in the periportal zone. Additionally, after 38 days hepatocellular foci with reappearance of γ-GT occurred mainly in the periportal zone. After 119 days, foci with increased γ-GT activity as well as a significant reduction of ATPase activity could be observed predominantly in the periportal region. The size and number of these putative preneoplastic foci were increased according to the time of administration of methapyrilene hydrochloride. After 181 days of methapyrilene hydrochloride treatment three of five animals developed hyperplastic nodules with corresponding alterations of enzyme activities. Methapyrilene hydrochloride — a carcinogen with an unknown mechanism of reaction-produces preneoplastic changes that are analogous to the well known preneoplastic lesions in the liver observed after administration of other carcinogenic agents.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Acta neuropathologica 60 (1983), S. 132-136 
    ISSN: 1432-0533
    Keywords: Cloverleaf skull anomally ; Tempral lobe dysgenesis ; Thanatophoric chondrodystrophy ; Ventricular diverticle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary An early fetal case of cloverleaf skull anomaly associated with thanatophoric chondrodystrophy is described. Localized ventricular diverticles are a peculiar finding. In addition there are previously described malformations limited to the temporal lobes and comprising plump gyri with abnormal deep sulci, thick periventricular heterotopias, dysgenesis of the parahippocampal gyrus, agenesis of the Ammon's horn, and small micropolygyria. The skull deformity is not dependent on hydrocephalus, demonstrating inconsistencies in previous pathogenetic concepts.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 2 (1983), S. 577-578 
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Innerhalb eines interdisziplinären Forschungsvorhabens wurden ausgewählte Umweltchemikalien (Simazin, Lindan, Trichlorethen, Tetrachlorethen) in ein 100 m langes künstliches Grundwassergerinne eingespeist, welches mit verdünntem Sickerwasser einer aerob betriebenen Deponie beschickt wird. Durch eine Vielzahl von Probenahmestellen ist es möglich, eine Vorstellung von der dreidimensionalen Verteilung der Substanzen im Gerinne zu erhalten. Außerdem lassen sich Schlüsse hinsichtlich Eliminations- und Rückhalteprozessen machen. Über die Probleme der Probenahme und Analytik der ausgewählten Stoffe wird berichtet. Es zeigte sich, daß die Entnahme- und Meßverfahren wegen der schwierigen Feldbedingungen bzw. der komplexen Zusammensetzung der Matrix zunächst gewisser Anpassungen bedurften.
    Notes: Summary Selected chemical substances (simazine, lindane, tri-, tetrachloroethene) were fed into an artificial aquifer (100 m) operated with diluted seepage water from an aerobic landfill. Numerous sampling points made it possible to obtain more information about a three-dimensional distribution of the substances within the aquifer. Elimination and retention can be observed as well. Problems of sampling and analytical procedures are discussed. It was obvious that the methods of sampling and determination required certain adaptions because of the difficult local conditions and the complex matrix composition, respectively. The work was carried out within the scope of an interdisciplinary research programme.
    Type of Medium: Electronic Resource
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