{"id":5722,"date":"2026-03-31T10:19:27","date_gmt":"2026-03-31T03:19:27","guid":{"rendered":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/?p=5722"},"modified":"2026-03-31T10:24:05","modified_gmt":"2026-03-31T03:24:05","slug":"yield-and-properties-of-collagen-from-nile-tilapia-oreochromis-niloticus-scales-effects-of-ultrasonic-pretreatment-on-pepsin-aided-extraction","status":"publish","type":"post","link":"https:\/\/www2.si.mahidol.ac.th\/department\/biochemistry\/yield-and-properties-of-collagen-from-nile-tilapia-oreochromis-niloticus-scales-effects-of-ultrasonic-pretreatment-on-pepsin-aided-extraction\/","title":{"rendered":"Yield and Properties of Collagen from Nile Tilapia (Oreochromis niloticus) Scales: Effects of Ultrasonic Pretreatment on Pepsin-Aided Extraction"},"content":{"rendered":"<p>Phanat Kittiphattanabawon, Hideki Kishimura, Soottawat Benjakul, <strong>Wonnop Visessanguan<\/strong><\/p>\n<h2 class=\"title\">Abstract<\/h2>\n<div id=\"eng-abstract\" class=\"abstract-content selected\">\n<div class=\"title\">\n<p>The yield and characteristics of collagen from Nile tilapia scale pretreated with ultrasound at 40 kHz for 2 h before pepsin-aided extraction for 12-72 h (US collagen) were investigated compared to collagen from the scales without ultrasonic pretreatment (non-US collagen). Both collagens&#8217; yields increased with prolonged extraction time (P&lt;0.05). Nevertheless, the yield of ultrasound-pretreated collagen (2.20-4.31%) was approximately 2 times greater than that of collagen without ultrasonic pretreatment (1.06-2.03%) (P&lt;0.05). The amino acid compositions of both collagens were comparable, consisting mainly of glycine, alanine, proline, and hydroxyproline (329-330, 115,119, 114-116, 85 residues per 1000 residues, respectively), and both were classified as type I collagen. Moreover, the thermal transition temperatures (39.38-39.43\u00b0C) and enthalpy (0.55 J\/g) were comparable between both collagens (P&gt;0.05). Analysis of the FTIR spectra indicated that the ultrasonication pretreatment of the scale before the collagen did not alter the triple-helical structure of the collagen. Therefore, pretreatment of the Nile tilapia scales with ultrasonication before the pepsin-aided process could increase yield without significantly affecting the characteristics and triple-helical structure of the collagen.<\/p>\n<p><a href=\"https:\/\/cast.kmitl.ac.th\/articles\/yield-and-properties-of-collagen-from-nile-tilapia-oreochromis-niloticus-scales-effects-of-ultrasonic-pretreatment-on-pepsin-aided-extraction\">https:\/\/cast.kmitl.ac.th\/articles\/yield-and-properties-of-collagen-from-nile-tilapia-oreochromis-niloticus-scales-effects-of-ultrasonic-pretreatment-on-pepsin-aided-extraction<\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Phanat Kittiphattanabawon, Hideki Kishimura, Soottawat  [&#8230;]\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-5722","post","type-post","status-publish","format-standard","hentry","category-3"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Yield and Properties of Collagen from Nile Tilapia (Oreochromis niloticus) Scales: Effects of Ultrasonic Pretreatment on Pepsin-Aided Extraction - \u0e20\u0e32\u0e04\u0e27\u0e34\u0e0a\u0e32\u0e0a\u0e35\u0e27\u0e40\u0e04\u0e21\u0e35 \u0e04\u0e13\u0e30\u0e41\u0e1e\u0e17\u0e22\u0e28\u0e32\u0e2a\u0e15\u0e23\u0e4c\u0e28\u0e34\u0e23\u0e34\u0e23\u0e32\u0e0a\u0e1e\u0e22\u0e32\u0e1a\u0e32\u0e25 \u0e21\u0e2b\u0e32\u0e27\u0e34\u0e17\u0e22\u0e32\u0e25\u0e31\u0e22\u0e21\u0e2b\u0e34\u0e14\u0e25<\/title>\n<meta name=\"robots\" content=\"index, follow, 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