| http://www.w3.org/ns/prov#value | - Among the aforesaid materials, cellulose, cellulose derivatives such as viscose rayon, cupraammonium rayon and cellulose acetate, such proteins as collagen and gelatin, polyvinyl alcohol and its derivatives, such polypeptides as polyglutamic acid, polyalanine, polylysine and polyaspartic acid, such polyamides as nylon-6 and nylon-6,6, and such polyesters as polyethylene terephthalate, polybutylene
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