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Starch loading was shown to improve mechanical strength from 4.07 ± 0.66 MPa to 10.35 ± 1.10 MPa , more closely resembling the mechanical strength of cancellous bone .
 Starch, mechanical strength, MPa, MPa, mechanical strength, cancellous bone
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:
 Starch, mechanical strength, MPa, MPa, mechanical strength, cancellous bone