1064
Microstructure characterisation was carried out using optical , scanning , conventional transmission and atomic resolution transmission electron microscopy .
 concept or principle: Microstructure; process characterization: optical; concept or principle: scanning; process characterization: transmission; process parameter: resolution; process characterization: electron microscopy
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: 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:
 concept or principle: Microstructure; process characterization: optical; concept or principle: scanning; process characterization: transmission; process parameter: resolution; process characterization: electron microscopy