9845
We adopt a Langmuir isotherm model to characterize the adsorption of nanoparticles by bilayer lipid membranes and extract the partition coefficient , K , and the standard free energy gain by this spontaneous process , for a variety of sizes of cell - membrane - penetrating nanoparticles .
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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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