9163
The effect of various parameters of the emulsion solvent evaporation technique on the size and morphology of the resulting PLA/nano-HAP microspheres was examined .
 parameters, emulsion, evaporation, morphology, microspheres
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: manufacturing standard, machanical property, manufacturing process, material, engineering feature, process parameter, machine or equipment, application, process characterization, enabling technology, biomedical, concept or principle 
Text: {0} 
Answer:
 parameters, emulsion, evaporation, morphology, microspheres