21040
The scaling , which is valid for strong confinement in spherical pores , predicts that the propagation equilibrium constant will depend on both nanopore size and chain length , such that the average chain length decreases significantly upon confinement .
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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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