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As nanoscale science and engineering continues to produce novel nanotechnology platforms , which inform , infiltrate , and impinge on many aspects of everyday life , it is no surprise that stem cell research is turning toward developments in nanotechnology to answer research questions and to overcome obstacles in regenerative medicine .
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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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