6484
In addition , with the HFCF - UF method , the volume ratio of ultrafiltrate to sample solution could be also well controlled by the inner diameters of both the glass tube and hollow fiber .
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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