8199
The results show that bond strength improved over 100 % with 30 s of treatment and over 50 % with 300 s of treatment .
 bond strength, s, s
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:
 bond strength, s, s