5901
We used a customized NIMA Langmuir trough interfaced to a Brewster angle microscope ( BAM ) and CCD camera ( Nanofilm _ ep3BAM , Accurion , previously Nanofilm Gmbh ) to study images of bitumen films at the air / water interface .
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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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