11. The synergistic effects would have been devastating to life. 12. The different chemicals might be potentiating synergistic effects ( 1 + 1 = 3 ). 13. This synergistic effect may result from chemotherapy making cells more vulnerable to radiation, or vice versa. 14. Corexit has been shown to exert a synergistic effect when mixed with oil, increasing its toxicity. 15. Together they show a synergistic effect in protection. 16. The first was an experiment testing the synergistic effect of zero gravity on sea urchin eggs. 17. It is possible and truly likely that these mixtures will have additive, neutralistic or synergistic effects . 18. At water temperatures higher than, synergistic effects of UV radiation and temperature further enhance the disinfection efficiency. 19. Professor Shintaro Kodama, a disciple of Ikeda, discovered in 1913 that synergistic effect between ribonucleotides and glutamate. 20. This alone shortens the induction period, and has been shown to have a synergistic effect with ketones.