7804
For tubular alginate constructs printed in air from sodium alginate and calcium chloride inks , a 2.5 height-diameter ratio can be achieved .
 tubular, alginate, sodium, alginate, calcium, be
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:
 tubular, alginate, sodium, alginate, calcium, be