Time lapse movie of the prophase stage during meiosis I in spermatocytes of the Locust Psophus stridulus. This is a historic movie made in the early 40s by Kurt Michel of the Zeiss company in Jena using Zernike's newly invented phase contrast microscope. Several sequences are shown, some proceeding to metaphase. Despite its early date, the movie and the others in the group remain some of the clearest examples of chromosome behavior during meiosis.
The movie was originally recorded on 35mm film, and later transferred to CD format. The text at the beginning of the movie translates approximately as follows: From the microlaboratory of the Carl Zeiss Company, Jena Director: Dr. K. Michel Meiosis in spermatogenesis in the locust Psophus stridulus L Scientific direction, production and filming by Dr. K. Michel Recorded with the phase contrast procedure of Zernike. Meiosis division I Prophase (Duration ca. 2 hr) IWF is the logo of The Institut fur den wissenscaftliche Film (Institute for scientific film located in Goettingen) ----------------------- Based on the 2 hr real time duration, it appears the movie represents an increased speed of ca. 50x. See also: Michel, K. (1941): Die Darstellung von Chromosomen mittels des Phasenkontrastverfahrens. Die Naturwissenschaften 29, 61-62 Michel, K. (1958): Die Reifeteilungen (Meiose) bei der Spermatogenese der Schnarrheuschrecke (Psophus stridulus l.) Institut für den Wissenschaftlichen Film, Göttingen
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