15029
The present study systematically and simultaneously investigates the influence of process variables of spray - drying on the properties of solid self - microemulsifying drug delivery system ( SMEDDS ) using design of experiment ( DOE ) and optimizes them in order to produce solid - SMEDDS satisfying pre - defined powder quality attributes .
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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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