24803
Over the last decade , selective phosphopeptide enrichment methods including IMAC and metal oxides ( TiO2 and ZrO2 ) have been developed and greatly facilitate large scale phosphoproteome analysis of various cells , tissues and living organisms , in combination with modern mass spectrometers featuring high mass accuracy and high mass resolution .
 Chemical: metal oxides; Chemical: TiO2; Chemical: ZrO2
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: metal oxides; Chemical: TiO2; Chemical: ZrO2