8389
The brush - adsorbed biomolecules were recovered by treating the nanobrush with ammonium hydroxide , which effectively collapsed the brush , thereby releasing the trapped compounds for MALDI MS analysis .
 Chemical: ammonium hydroxide
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: ammonium hydroxide