22664
Heterogeneous nucleation on disordered porous substrates with small yet large distribution of pores is considered a panacea for this problem , but a universal nucleant suitable for crystallizing large variety of proteins does not really exist .
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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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