Papers from the Tortugas Laboratory of the Carnegie Institution of Washington, Volume 35 |
Contents
METHODS | 2 |
THE EFFECT OF SUNLIGHT ON UNSTAINED EGGS | 32 |
Anthracene | 39 |
6 other sections not shown
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15 minutes 15-minute irradiation 2-cell stage 39 minutes 50 per cent anaphase auramin blastomeres blastulae brilliant cresyl blue cent pitted chromosomes close of irradiation Congo red cytoplasm diffuse light diffuse-light culture disintegrated division eggs became Eggs in NRSW eggs irradiated eggs remained eggs showed eggs were transferred end of irradiation entering the 2-cell eosin Y experiments filter fluorescein following morning foot-candles gastrulae hours after insemination inseminated eggs Inseminated Lytechinus eggs insemination no separated Intensity of sunlight irradiated 20 minutes irradiated and stirred irradiated cultures irregular cleavage irregular in form Janus green minutes after insemination minutes later neutral red nigrosin nonirradiated cultures nuclei photodynamic effect picric acid pink pyronin in sea Results sea water sea-water control separated fertilization membranes separated membranes solution of Janus solution of neutral solution of pyronin spindle stirred for 20 sunlight foot surface tion transferred 5 minutes undivided eggs Uninseminated eggs transferred vacuoles water 5 minutes