6947
While the tilt angle needed for displacement reduced significantly from 50 to 95 mu L , this was markedly better than nonscribed surfaces , where tilt angles always had to be kept to within 30 degrees .
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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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