. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 40S I). L. MARTTXSEX AND I). .1. KIMELDORF X 30 25 20 15 10. Exposure Rote Fraction (R/sec) Responding 80 10/10 50 8/8 25 10/10 10 30/30 5 15/18 1 22/30 07 4/8 5/9 3/7 11/24 2/8 1/8 001 o-- 10 10 100 EXPOSURE RATE (R/sec) FIGURE 1. Average latency of the antennal-waving response (graph), and fraction re- sponding (tabular data), as a function of exposure rate. Different symbols represent different beam qualities : 0 = 300 kV, 20 mA. mm Al. HYI. ; X = 300 kV, 20 mA, mm Cu. HVL; A = 100 kY, 20
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 40S I). L. MARTTXSEX AND I). .1. KIMELDORF X 30 25 20 15 10. Exposure Rote Fraction (R/sec) Responding 80 10/10 50 8/8 25 10/10 10 30/30 5 15/18 1 22/30 07 4/8 5/9 3/7 11/24 2/8 1/8 001 o-- 10 10 100 EXPOSURE RATE (R/sec) FIGURE 1. Average latency of the antennal-waving response (graph), and fraction re- sponding (tabular data), as a function of exposure rate. Different symbols represent different beam qualities : 0 = 300 kV, 20 mA. mm Al. HYI. ; X = 300 kV, 20 mA, mm Cu. HVL; A = 100 kY, 20 mA, mm Al. HVL. Since there was no significant difference in the average latency of the response at 1 joints of common exposure rates (10, 1 and R/sec), the curve in Figure 1 was fitted to an average value at each exposure rate where more than one beam quality was employed. Another behavior that consistently appeared as a prompt response was a burst of rapid running activity along the floor and all sides of the exposure chamber. As with the antennal response, the incidence varied directly, while latency varied inversely, with exposure rate. The exposure rate threshold for the running re- sponse appeared higher than for the antennal response since it was not observed with less than R/sec. Rates of 1 R/sec or less often evoked only the antennal response ; when running did occur it was typically several seconds later in appear- ance than the antennal-waving response. At 10 R/sec and above, the running response began simultaneously with the antennal response, and both responses were exhibited by 100% of the subjects. The intensity of the running response ap- peared variable until it was analyzed as a function of exposure rate. When speed was taken as a measure of the strength of the running response, it was found to be related to the rate of x-ray exposure (Fig. 2). Speed of running appeared to be independent of exposure rate between and 5 R/sec. then in- creased
Size: 1156px × 2162px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
