25043
In both sexes , URT uptake efficiency was strongly concentration dependent averaging 90 % at 0 . 5ppm compared to 50 % at 30ppm ( 25ml / min flow rate ) , indicating saturable processes were involved .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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