31. The toxicants used in these experiments were chosen because they had a known mode of action . 32. Marijuana's basic mode of action is well known. 33. These compounds differ in structure from bacterial antibiotics, so they may have novel modes of action . 34. Research continues to investigate its active component hyperforin, and to further understand its mode of action . 35. Fenoxycarb is non-neurotoxic and does not have the same mode of action as other carbamate insecticides. 36. Its mode of action is to inhibit transport-associated phosphorylation of glucose, which reduces mycelial growth rate. 37. Cross protection is similar in practice, although not in mode of action , to viral vaccinations in humans. 38. Statistical analyses were used to determine significant differences in responses between toxicants with different modes of action . 39. This involves switching among pesticide classes with different modes of action to delay or mitigate pest resistance. 40. Levites proposed a possible secondary mode of action for disopyramide, against reentrant arrhythmias after an ischemic insult.