6174
The differences in the chemical structure and molecular organisation detected by thermogravimetric analysis ( TGA ) , infrared spectroscopy ( FTIR ) and nuclear magnetic resonance spectroscopy ( NMR ) were also investigated by proton nuclear magnetic resonance relaxometry , in particular by fast field cycling ( FFC ) relaxometry , and relaxometry in the rotating frame .
 None
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