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Synchrotron FTIR ( S - FTIR ) microspectroscopy was used to monitor both protein secondary structures ( conformations ) and their orientations in single cocoon silk fibers of the Chinese Tussah silk moth ( Antheraea pernyi ) .
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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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