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  • 1
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    Precisely localized LTD in the neocortex revealed by infrared-guided laser stimulation (1999)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1999-10-03
    Description: In a direct approach to elucidate the origin of long-term depression (LTD), glutamate was applied onto dendrites of neurons in rat neocortical slices. An infrared-guided laser stimulation was used to release glutamate from caged glutamate in the focal spot of an ultraviolet laser. A burst of light flashes caused an LTD-like depression of glutamate receptor responses, which was highly confined to the region of "tetanic" stimulation (〈10 micrometers). A similar depression of glutamate receptor responses was observed during LTD of synaptic transmission. A spatially highly specific postsynaptic mechanism can account for the LTD induced by glutamate release.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dodt, H -- Eder, M -- Frick, A -- Zieglgansberger, W -- New York, N.Y. -- Science. 1999 Oct 1;286(5437):110-3.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Max-Planck-Institute of Psychiatry, Kraepelinstrasse 2, 80804 Munich, Germany. dodt@mpipsykl.mpg.de〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/10506556" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Dizocilpine Maleate/pharmacology ; Electric Stimulation ; Excitatory Amino Acid Antagonists/pharmacology ; Excitatory Postsynaptic Potentials ; Glutamates/pharmacology ; Glutamic Acid/metabolism ; In Vitro Techniques ; Infrared Rays ; Lasers ; Microscopy, Video ; Neocortex/cytology/*physiology ; *Neuronal Plasticity ; Patch-Clamp Techniques ; Photolysis ; Pyramidal Cells/*physiology ; Rats ; Rats, Sprague-Dawley ; Receptors, Glutamate/*metabolism ; Receptors, N-Methyl-D-Aspartate/antagonists & inhibitors/metabolism ; Synapses/*physiology ; *Synaptic Transmission
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
    Electronic Resource
    Electronic Resource
    Zerstörungsfreie, quantitative Bestimmung von innenliegenden Fehlern mit dem Wärmeflußverfahren (1986)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 17 (1986), S. 292-298 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Nondestructive, Quantitative Evaluation of Internal Imperfections by Thermal Flux MethodThe thermal heat flux method with cholesterol liquid crystals to indicate the temperature is a nondestructive testing method, easy to handle and inexpensive. It is possible to inspect parts in the area. If the testing condition are chosen that there is thermal equilibrium the thermographs can be evaluated quantitative. This is the fact that the method not only detect a flaw but also the size and depth can be estimated.We will expect that the importance of thermography will grow up by the written improvement.
    Notes: Das Wärmeflußverfahren mit cholesterinischen Flüssigkristallfolien als Temperaturindikator ist ein einfach handhabbares, kostengünstiges zerstörungsfreies Prüfverfahren. Mit diesem Verfahren können Bauteile flächig auf Fehlstellen untersucht werden. Die bislang unberücksichtigte Möglichkeit im stationären thermischen Zustand zu prüfen, erlaubt die erhaltenen Thermogramme quantitativ auszuwerten. Dadurch kann aus den Thermogrammen Größe und Tiefenlage bestimmt werden. Es ist zu erwarten, daß die Bedeutung des beschriebenen thermographischen Verfahrens durch die erweiterte Aussagefähigkeit deutlich zunehmen wird.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19860170808
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Quality assurance for fiber-reinforced composites (1985)
    Hoboken, NJ : Wiley-Blackwell
    Advances in Polymer Technology 5 (1985), S. 171-180 
    Details
    ISSN: 0730-6679
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: To ensure the growing use of high-performance composites such as carbon-fiber-reinforced plastics (CFRP), the quality properties of these materials must be guaranteed. This goal can be reached through a quality assurance concept which still has to be developed. The individual steps of such a development are indicated. Flaws occuring in fiber-rein-forced composites are discussed, taking into consideration the manufacturing process, and the nondestructive and slightly destructive test methods suitable for flaw selected flaws are given as examples.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adv.1985.060050301
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