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Abstract ▼ AI-Helper

To optimize the processing conditions of fermented ascidian, Halocynthia roretzi, fermentation at low temperature with different salt contents, the effect of enzymes added, and the quality changes during fermentation were investigated. As the quality factors, changes in such components as free amino...

To optimize the processing conditions of fermented ascidian, Halocynthia roretzi, fermentation at low temperature with different salt contents, the effect of enzymes added, and the quality changes during fermentation were investigated. As the quality factors, changes in such components as free amino acid, volatile basic nitrogen(VBN), amino nitrogen, total creatinine, total carotenoid, extents of browning, reducing sugar and glycogen were determined. The quality was also evaluated organolatically by pannel test. Fresh deshelled and sliced ascidian were fermented for 50 days at $5{\pm}1^{\circ}C$ with different salt contents of 5, 10, $15\%$ (w/w) with enzyme contents of papain $0.1\%$ and protease-A $0.1\%$ VBN increased gradually during the 50 days of fermentation and showed $30{\sim}40mg/100g$ at 30, 35 and 45 days in case of salt contents 5, 10 and $15\%$ added with $0.1\%$ papain and protease-A, respectively. Amino nitrogen and the total creatinine increased until 20 days, hereafter tended to decrease gradually. Total carotenoid and glycogen also decreased during the fermentation. The results of sensory evaluation of fermented ascidian at $5{\pm}1^{\circ}C$ added $0.1\%$ papain or protease-A showed that the peculiar taste and flavor of ascidian was sustained for $30{\sim}40$ at least 20 days with $5\%$ NaCl and $35{\sim}45$ days of fermentation with 10 and $15\%$ NaCl.