Catalase Photoinactivation

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Abstract
Tobaccos grown in the United States, Rhodesia, South Africa, and New Zealand, have been measured for their polonium-210 content. Details of the method of measurement are given and the results are listed. A mean of 0.15 picocurie per gram has been found in New Zealand tobacco, compared with 0.49 picocurie per gram in United States tobacco. The concentration in South African tobacco was approximately the same as in United States tobacco, but the level in Rhodesian tobacco appeared to be significantly higher.