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  1. Frog Heart Experiments (1975 Film, Video)

    Subject
    Biology
    Distribution
    Film (16mm)

    Shows the dissection of a pithed frog in preparation for experiments on the heart. A kymograph is employed to show the rate and variation of heart beat under varying conditions. The effects on the heart of...

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  2. Preparation of Biological Materials for the Electron Microscope: Ultra-Thin Sectioning (1973 Multimedia, Video)

    Subject
    Biology
    Distribution
    Sale, Videocassette. Standard formats. b&w. 22 min. Audiocassette. 15 min.; 75 slides. col.

    Shows the techniques used to produce ultra-thin sections of zoological material for observation under the electron microscope. The techniques demonstrated include dehydration, setting in epoxy resin, the use...

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  3. Double Multiple Stimulation of a Frog Gastrocnemius Nerve Muscle Preparation (1971 Video)

    Subject
    Biology
    Distribution
    Sale, Videocassette. Standard formats. b&w. 20 min.

    Illustrates equipment and experimental procedure involved in obtaining trace diagrams for double and multiple stimulation. Makes special reference to determining the ‘refractory period’ (double...

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