28441
The chemical - physical features of the nanoparticles are fully investigated and their interaction with cells expressing ( GTL - 16 gastric carcinoma line ) or not expressing ( NIH - 3T3 fibroblasts ) the Met / HGFR is analyzed .
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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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