การสกัดผลิตภัณฑ์พลอยได้จากเกล็ดปลานิลและเกล็ดจระเข้
Tilapia and crocodile scales were treated with sodium chloride, sodium hydroxide, sulfuric acid and citric acid before gelatin extraction at 50 ºC for 3 h then collagen type were evaluated by SDS-PAGE. The residue scales were treated with sodium hydroxide and hydrochloric acid for chitin-chitosan extraction then degree of deacetylation and ...