15443
Furthermore , when the percentage of HEW was decreased , the incidence of mouldy samples occurred sooner , which indicates that HEW has some antimicrobial ability , especially in the 100 % HEW + 0 % DEW system where mould growth did not occur .
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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:
 None