| 41. | A formal half life may also be determined.
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| 42. | At what point does the sample itself get small enough that half life stops making sense?
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| 43. | "If casein increases the half life of IGF-1, the effects could be dramatic, " he said.
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| 44. | Because of the short half life, Tritium does not exist in nature except in trace amounts.
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| 45. | It also wants to cancel the insurance when the loan's " half life " is reached.
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| 46. | The proton is almost certainly unstable, the only question is how large the half life is.
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| 47. | The half life of gallium-67 is 78 hours.
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| 48. | At best briefly mention both enemies and wepaons from Half Life make " comebacks " in HL2.
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| 49. | It is a persistent organic pollutant ( POP ) with a half life of 2 15 years.
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| 50. | U238 half life is 4.5 billion years.
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