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The average primary dendrite arm spacing increases from 17 μm at the bottom to 39 μm at the top of the deposit , and the volume fraction of the interdendritic eutectic decreases from 52.1 % to 39.3 % .
 concept or principle: average; biomedical: dendrite; process parameter: volume fraction; concept or principle: eutectic
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: average; biomedical: dendrite; process parameter: volume fraction; concept or principle: eutectic