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  • 1
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The luminescent flashing capabilities and swimming behavior were examined for two species of small midwater squids (Pterygioteuthis microlampas and P. giardi). Recently captured squid were placed in a small aquarium, where their movements and luminescent flashes could be recorded with an image intensifier, a photomultiplier tube and associated equipment. Flashing behavior was initiated by disturbing the squid with an eletrical shock. The following 4 behaviors were observed: (1) a short flash and a rapid departure from the electrode; (2) a short flash and a delayed, slow departure from the electrode; (3) a longer flash persisting after a rapid departure from the electrode; (4) a longer flash when departure was prevented by continuing the shock. Luminescent flashes probably have a general defensive function, discouraging or disrupting an attack by potential predators, and within this context there may exist numerous strategies involving flashes.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 309 (1981), S. 193-197 
    ISSN: 1618-2650
    Keywords: Thermometrische Titration ; digitale Meß-werterfassung, automatische Auswertung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Eine Methode zur Steuerung, digitalen Meßwerterfassung und automatischen Auswertung thermometrischer Titrationen, mit der subjektive Fehler soweit wie möglich vermieden werden, wurde für unser früher beschriebenes hochauflösendes Kalorimetersystem entwickelt. Hierzu war eine Erweiterung der Anordnung um einen Microcomputer und einige elektronische Module erforderlich. Das Verfahren, die Anordnung und die Software, welche erstellt werden mußte, sind ausführlich beschrieben. Als Beispiel für die Funktionsfähigkeit der Methode ist die Protonisierung von Tris(hydroxymethyl)-aminomethan mit Salzsäure, häufig als Standard für thermometrische Titrationen verwendet, angegeben.
    Notes: Summary A method for the control, the digital data acquisition, and the automatic evaluation of thermometric titration measurements, eliminating human error as much as possible, has been developed for our high-resolution calorimeter system described earlier. This required the expansion of the device by a microcomputer and some electronic modules. The procedure, the device, and the software which had to be written, are described in detail. The protonation of trishydroxymethylaminomethane with hydrochloric acid, often used as a thermometric titration standard, is given as an example for the validity of the method.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Fresenius' Zeitschrift für analytische Chemie 314 (1983), S. 563-566 
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Ein hochauflösendes Calorimeter zur Bestimmung von Wasser in organischen Lösungsmitteln wird beschrieben. Die Anordnung wurde bei 25
    Notes: Summary A high-resolution calorimeter for the determination of water in organic solvents is described. The device has been tested at 25
    Type of Medium: Electronic Resource
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