7999
It was found that hydrogel objects cured after completion without intermediate curing steps had the highest fracture stresses and compression at break with 32.5 N cm−2 and 44 % , respectively .
 hydrogel, cured, curing, fracture, compression, N
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:
 hydrogel, cured, curing, fracture, compression, N