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As the degradable alloys are expected to degrade inside human body , the main compositions of the alloys should be metallic elements that can be metabolized , and demonstrate appropriate degradation rates in the human body .
 material: As; application: degradable alloys; material: alloys; material: be; material: elements; material: be; process characterization: degradation rates
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:
 material: As; application: degradable alloys; material: alloys; material: be; material: elements; material: be; process characterization: degradation rates