10800
Conjugation of the cell - penetrating peptide derived from the human immunodeficiency virus 1 ( HIV ) transactivator protein ( TAT ) to mesoporous silica nanoparticle is shown to be an effective way to enhance transmembrane delivery of nanoparticles for intracellular and molecular therapy .
 Chemical: silica
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: silica