{"CIL_CCDB":{"Status":{"Is_public":true,"Deleted":false,"Publish_time":1324011600},"Data_type":{"Still_image":false,"Z_stack":false,"Video":true,"Time_series":false},"CIL":{"Image_files":[{"File_type":"Zip","File_path":"39226.zip","Size":53571712,"Mime_type":"application\/zip"},{"File_type":"Jpeg","File_path":"39226.jpg","Size":36417,"Mime_type":"image\/jpeg; charset=utf-8"},{"File_type":"Mp4","File_path":"39226_web.mp4","Size":18192727,"Mime_type":"video\/mp4"}],"CORE":{"ATTRIBUTION":{"Contributors":["Kurt Michel","Heinz Gundlach"]},"BIOLOGICALPROCESS":{"onto_name":"spermatogenesis","onto_id":"GO:0007283"},"PARAMETERIMAGED":{"onto_name":"elastic scattering of photons","onto_id":"FBbi:00000587"},"IMAGEDESCRIPTION":{"free_text":"Time lapse movie of meiotic metaphase and anaphase in spermatocytes of the Locust Psophus stridulus. Two sequences are shown, each continuing through telophase to the start of cytokinesis. In addition to the squat meiotic chromosomes, the spindles are clearly visible.\n  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. \n  Despite its early date, the movie and the others in the group remain some of the clearest examples of chromosome behavior during meiosis."},"ITEMTYPE":{"onto_name":"film","onto_id":"FBbi:00000303"},"CELLULARCOMPONENT":{"onto_name":"nuclear chromosome","onto_id":"GO:0000228"},"RELATIONTOINTACTCELL":{"onto_name":"whole mounted tissue","onto_id":"FBbi:00000024"},"SOURCEOFCONTRAST":{"onto_name":"differences in amount of elastic light scattering","onto_id":"FBbi:00000600"},"GROUP_ID":"10170","TECHNICALDETAILS":{"free_text":"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:\n\nMeiosis  division I\nMetaphase ( ca. 9-10 hr)\nand\nAnaphase (ca. 1-2 hr) \n-----------------------\n Based on the  duration, it appears the movie represents an increased speed of ca. 50x.\n\nSee also:\nMichel, K. (1941): Die Darstellung von Chromosomen mittels des Phasenkontrastverfahrens. Die Naturwissenschaften 29, 61-62 \nMichel, K. (1958): Die Reifeteilungen (Meiose) bei der Spermatogenese der Schnarrheuschrecke (Psophus stridulus l.) Institut für den Wissenschaftlichen Film, Göttingen"},"DATAQUALIFICATION":{"free_text":"PROCESSED"},"TERMSANDCONDITIONS":{"free_text":"public_domain"},"IMAGINGMODE":{"onto_name":"phase contrast microscopy","onto_id":"FBbi:00000247"},"DIMENSION":[{"Space":{"Image_size":720,"axis":"X"}},{"Space":{"Image_size":576,"axis":"X"}}],"NCBIORGANISMALCLASSIFICATION":{"onto_name":"Psophus stridulus","onto_id":"NCBITaxon:433472"},"PREPARATION":{"onto_name":"living tissue","onto_id":"FBbi:00000025"},"VISUALIZATIONMETHODS":{"onto_name":"visualization of contiguous regions","onto_id":"FBbi:00000396"},"CELLTYPE":{"onto_name":"spermatocyte","onto_id":"CL:0000017"}}},"Citation":{"Title":"Kurt Michel, Heinz Gundlach (2011) CIL:39226, Psophus stridulus, spermatocyte. CIL. Dataset","ARK":"ark:\/b7295\/w9cil39226","DOI":"doi:10.7295\/W9CIL39226"}}}