14427
Silk fibroin cryogels with remarkable properties were obtained from frozen fibroin solutions ( 4 . 2 - 12 . 6 % ) at subzero temperatures between - 5 and - 22 degrees C .
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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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