507
Kuboki found that , when the pore size ranged from 300 to 400 the implantation of porous hydroxyapatite scaffolds into rats showed higher alkaline phosphates activity , osteocalcin content and bone ingrowth .
 process parameter: pore size; manufacturing process: implantation; engineering feature: porous hydroxyapatite scaffolds; material: alkaline phosphates; biomedical: osteocalcin; concept or principle: bone ingrowth
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:
 process parameter: pore size; manufacturing process: implantation; engineering feature: porous hydroxyapatite scaffolds; material: alkaline phosphates; biomedical: osteocalcin; concept or principle: bone ingrowth