3043
Consequently , the obtained results , when employing cellulose as a substrate and under these conditions , suggest that the grafting - from approach is superior to the grafting - to technique with respect to controlling the distribution of the polymeric content on the surface .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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