. The Biological bulletin. Biology; Zoology; Marine biology. BACTERIAL SENSITIVITY TO ULTRAVIOLET 113 six hours of ineubation. By varying our ultraviolet energy, we deter- mined the energy required for a 50 per cent bacterial destruction after the various incubationary periods. These observations prove that the. Fig. 4. Agar plate with B. prodigiosus exposed to constant energy (630 ) with variable time and intensity factors. Exposures (started at time of maximal sensitivity) : 1 120 min. X ergs/() 2 40 " X 3 20 " X 4 10 " X 63 5 2 " X315 avera
. The Biological bulletin. Biology; Zoology; Marine biology. BACTERIAL SENSITIVITY TO ULTRAVIOLET 113 six hours of ineubation. By varying our ultraviolet energy, we deter- mined the energy required for a 50 per cent bacterial destruction after the various incubationary periods. These observations prove that the. Fig. 4. Agar plate with B. prodigiosus exposed to constant energy (630 ) with variable time and intensity factors. Exposures (started at time of maximal sensitivity) : 1 120 min. X ergs/() 2 40 " X 3 20 " X 4 10 " X 63 5 2 " X315 average resistance of the bacteria differs considerably with the incuba- tion time; and that about 3 hours in the warmer months and approxi- mately 6 hours in the colder months after plating, a minimum of re- sistance or a maximum of sensitivity exists (Fig. 5). The sensitivity varies most pronouncedly in the first few hours and again after 8 hours of incubation, whereas close to the maximum it is relatively constant. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-; Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report; HighWire Press. Lancaster, Pa. [etc. ] : Lancaster Press, inc. [etc. ]
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