15849
It has been recently reported that for some suspensions of magnetic nanoparticles the transverse proton relaxation rate , R ( 2 ) , is dependent on the time that the sample is exposed to an applied magnetic field .
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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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