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  • 1
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Electrochimica Acta 5 (1961), S. 13-27 
    ISSN: 0013-4686
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    The @International Journal Of Applied Radiation And Isotopes 18 (1967), S. 7-10 
    ISSN: 0020-708X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Amsterdam : Elsevier
    Journal of Chromatography A 55 (1971), S. 121-136 
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 28 (1972), S. 1994-1999 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Copenhagen : International Union of Crystallography (IUCr)
    Acta crystallographica 29 (1973), S. 1432-1438 
    ISSN: 1600-5740
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Calcified tissue international 6 (1970), S. 20-31 
    ISSN: 1432-0827
    Keywords: Calcification ; Metals ; Apatite ; Collagen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Physics
    Description / Table of Contents: Résumé Plusieurs sels métalliques (par ex., PbCl2, HoCl3, FeCl2, CrCl3) favorisent la précipitation d'apatite lorsqu'ils, sont ajoutés à une solution calcifiante. Toutefois, seuls certains d'entre eux (par ex., PbCl2, HoCl3) ont cette même propriété lorsqu'ils sont administrés à des rats. Lorsqu'injecté par voie sous-cutanée, le FeCl2 se dépose surtout à la surface de fibrilles collagènes bien développées. Il augmente les concentrations locales de calcium et de phosphore sans toutefois produire d'apatite. Au contraire, l'acétate de plomb administré de la même façon produit rapidement l'accumulation d'une substance cristalline (probablement du triphosphate de, plomb); il se dépose autour des faisceaux collagènes et endommage d'une façon plus marquée que le FeCl2 les éléments cellulaires du tissu, conjonctif;, finalement, il conduit à la formation d'apatite.
    Abstract: Zusammenfassung Viele Metallsalze (z. B. PbCl2, HoCl3, FeCl2, CrCl3) fördern in einer geeigneten Lösung die Ausfällung von Apatit; werden sie jedoch Ratten verabfolgt, so entfalten nur einige (z. B. PbCl2, HoCl3), diese Wirkung. Nach subcutaner Injektion ist FeCl2 größtenteils an der Oberfläche gut geformter kollagener Fibrillen abgelagert; es erhöht die örtliche Konzentration von Calcium und Phosphor, führt aber nicht zur Bildung von Apatit. Andererseits ruft Bleiacetat (in gleicher Weise verabreicht) eine frühe Anhäufung von kristallinem Material hervor (wahrscheinlich Bleitriphosphat); es lagert sich um Kollagenbündel herum ab und schädigt die Bindegewebszellen mehr als FeCl2. Schließlich führt es zu Apatitbildung.
    Notes: Abstract Many metallic salts (e.g., Pbcl2, HoCl3, FeCl2 CrCl3) favor the precipitation of apatite when added to a calcifying solution; however, only some of them (e.g., PbCl2, HoCl3) have the same actionin vivo. FeCl2 injected subcutaneously is deposited mostly on the surface of well-formed collagen fibrils; it increases the local concentrations of calcium and phosphorus but does not produce apatite. On the other hand, lead acetate (administered by the same route) produces an early accumulation of a crystalline material (probably lead triphosphate); it is deposited around collagen bundles and has, a more damaging effect on the cellular components of connective tissue than FeCl2. Eventually, it gives way to apatite formation.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    International archives of occupational and environmental health 71 (1998), S. 263-269 
    ISSN: 1432-1246
    Keywords: Key words Angular and fibrous particles ; Silica ; Lung cancer ; TEM-EDS
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Introduction: The lung concentration of angular and fibrous particles was measured in cases of lung fibrosis only, in cases of lung fibrosis and lung cancer, and in cases of lung cancer only. These patients worked in different trades (mining, foundries, construction and were not a homogeneous group of exposed workers. Material and methods: Particles, both angular and fibrous, were extracted from lung parenchyma by a bleach digestion method, mounted on copper microscopic grids by a carbon replica technique, and analyzed by transmission electron microscopy (TEM) and energy-dispersive spectroscopy (EDS). The quartz concentration was also determined by X-ray diffraction (XRD) on a silver membrane filter after extraction from the lung parenchyma. Results: (1) Lung cancer and lung fibrosis cases retained more metal-rich particles (P=0.02) and more angular particles of all sorts (P=0.009) than did lung fibrosis cases only, and the differences were statistically significant. (2) However, more quartz was retained in the lungs in lung fibrosis cases than in lung fibrosis or lung cancer cases, but the difference in the concentrations was not statistically significant. (3) More ferruginous bodies were retained in the lungs in lung cancer and lung fibrosis cases than in cases of lung fibrosis only, and the difference in the concentrations was statistically significant (P=0.02). Conclusion: Results obtained from lung tissue must always be interpreted cautiously. However, these results are consistent with the hypothesis that workers in some trades such as foundries were exposed not only to quartz but also to asbestos, ceramic fibers, metal-rich non fibrous particles, and other likely carcinogenic chemicals. The wide range of particle types identified in the lungs of these workers illustrates the complexity of trying to determine disease origins in these work environments. Epidemiology studies have to control for the exposure to these carcinogens as well as for smoking habits.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Bulletin of environmental contamination and toxicology 57 (1996), S. 867 -874 
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1432-2072
    Keywords: Key words Anxiety ; Benzodiazepine ; Diazepam ; Elevated plus-maze ; Inbred and outbred mouse strains ; Light/dark test
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  Rationale: Natural strain differences exist in mice for behavioural traits such as emotional reactivity. Objective: The present experiments compared the behavioural profiles of nine strains of mice (BALB/c, C57BL/6, C3H, CBA, DBA/2, NMRI, NZB, SJL, Swiss) in two models of anxiety after the administration of the benzodiazepine diazepam. Methods: The tests used were the light/dark choice task and the elevated plus-maze, two well-validated anxiolytic screening tests. Results: In vehicle-treated animals, differences on variables designed to measure anxiety-related behaviours were observed in both tests. In the light/dark test, the strains could be divided into three distinct groups: two non-reactive strains (NZB and SJL), an intermediate-reactive group (C3H, CBA, DBA/2, NMRI, C57BL/6 and Swiss), and one highly reactive strain (BALB/c). In the elevated plus-maze, SJL, NMRI, CBA and, to a lesser extent, C3H strains of mice, consistently showed low levels of anxiety-related behaviours. Intermediate levels were seen in the Swiss and BALB/c strains, and high levels of emotional reactivity were seen in C57BL/6, DBA/2 and NZB. The strain distribution between the light/dark and the elevated plus-maze tests shows similarities and differences, suggesting that each of these experimental procedures represents a different set of behaviours. Marked differences between a number of strains of mice in their sensitivity to the anxiolytic-like action of diazepam were observed in both the light/dark and the elevated plus-maze tests. Mice of the BALB/c, Swiss and, to a lesser extent, CBA and C3H strains were responsive to diazepam in both tests, although in the case of CBA mice, effects may have been contaminated by behavioural suppression. SJL mice were largely unresponsive to the action of the benzodiazepine in both tests, whereas in C57, DBA/2, NMRI and NZB mice, diazepam produced positive effects only in the elevated plus-maze. Conclusion: The finding of differential strain distributions both with and without diazepam treatment in the light/dark and the elevated plus-maze tests, indicates that not all strains of mice are suitable for investigating the effects of GABA/BZ receptor ligands. This study may thus provide a useful guide for choosing the best strain of mice for studying the pharmacology of fear-related behaviours.
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1432-2072
    Keywords: Benzodiazepines ; BZ-1 (ω 1) receptor ; Anxiety ; Elevated plus-maze ; Risk assessment ; Locomotor activity ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The behavioral effects of a wide range of BZ (ω) receptor ligands, including non-selective full (alprazolam, clorazepate, chlordiazepoxide and diazepam) and partial (bretazenil, imidazenil and Ro 19-8022) agonists, and selective BZ-1 (ω 1) (abecarnil, CL 218,872, CL 284,846 and zolpidem) receptor ligands, were compared in the rat elevated plus-maze test. Behaviors recorded comprised the traditional indices of anxiety as well as a number of ethologically derived measures. In addition, the specificity of drug effects was evaluated by measuring spontaneous locomotor activity in activity cages in separate groups of animals. Results showed that all compounds tested not only increased the proportion of time spent and proportion of entries into the open arms of the maze (considered as traditional indices of anxiety) but also affected headdippings and attempts at entry into open arms, which can be considered as indices of risk assessment responses. However, the magnitude of these effects was generally smaller with the BZ-1 (ω 1) selective agents. Moreover, additional differences were apparent on the total number of arm entries measure, which was significantly increased by most full and all partial agonists, but was unaffected by the selective BZ-1 (ω 1) compounds. If it is assumed that total arm entries are contaminated by anxiety, the latter finding indicates a weaker anxiety-reducing potential of selective BZ-1 (ω 1) ligands. Importantly, the increase in total arm entries induced by the non-selective agents was not associated with a similar effect on locomotion as revealed in the actimeter. Finally, anxiolysis produced by the BZ-1 (ω 1) ligands was invariably observed at doses which reduced locomotor activity, suggesting that the anxiolytic-like effects of these compounds are confounded by decreases in locomotor activity.
    Type of Medium: Electronic Resource
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