tailieunhanh - Effect of ultrasound on pretreatment of tuna skin for gelatin production
This paper presents the result of study on the effect of ultrasound on extraction yield and quality of gelatin obtained from tuna skins using alkaline treatment method and alkaline-acid treatment method with ultrasound assistance. The results showed that ultrasound could shorten the time of alkaline treatment, while ensured the yield and the quality of obtained gelatin. | Journal of Science and Technology 54 (4A ) (2016) 55-62 EFFECT OF ULTRASOUND ON PRETREATMENT OF TUNA SKIN FOR GELATIN PRODUCTION Đang Minh Nhat1, *, Chau Thanh Hien2 1 The University of Da Nang-University of Science and Technology, 54 Nguyen Luong Bang,Lien Chieu, Da Nang 2 Da Nang College of Food Industry, 101B Le Huu Trac, Da Nang * Email: dangminhnhat@ Received: 15 August 2016, Acceptedfor publication: 5 October 2016 ABSTRACT This paper presents the result of study on the effect of ultrasound on extraction yield and quality of gelatin obtained from tuna skins using alkaline treatment method and alkaline-acid treatment method with ultrasound assistance. The results showed that ultrasound could shorten the time of alkaline treatment, while ensured the yield and the quality of obtained gelatin. Accordingly, the appropriate parameters of ultrasound mode that gave the best yield and quality of gelatin were determined as follows: for alkaline treatment method: amplitude of 80 %, period of and ultrasound time of 90 min; for the alkaline-acid treatment method: amplitude of 8 0%, period of and ultrasound time of 30 min. The former method produced gelatin with better yield and gel strength compared to the latter one ( % and g in comparison with % và g, respectively). The method with ultrasound support gave the gelatin with better quality in term of lipid content and gel strength in comparison with the traditional alkaline treatment method without ultrasound assistance. Keywords: fish gelatin, ultrasound, tuna, alkaline treatment, alkaline-acid treatment. 1. INTRODUCTION Extraction of gelatin from fish skins for applying in food, pharmaceutical industries, medicine, cosmetics and photography have attracted greater interest recently. Various works have shown that the extraction of gelatin from fish skins would achieve high yield and good quality when fish skins are pretreated with lime or combination of lime and acid. However, .
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