Proposed new color retention method for tilapia fillets (O.niloticus鈾�脳O.aureus鈾? by euthanatizing with reduced carbon monoxide
Journal of Food Processing and Preservation, 2008,32(5):729-739
褰卞搷鍥犲瓙錛?.389
Abstract: The conditions of color retention for tilapia fillets (O. niloticus鈾�脳 0. aureus鈾? treated by euthanatizing with reduced carbon monoxide (CO) were investigated. Live tilapias were first exposed to water saturated with CO. After a certain amount of CO-saturated water had been pumped through the gills, the tilapias were timely picked out and killed following the industry guidelines. The color value of fillets was measured by colorimeter to evaluate the color retention. The results showed that (1) temperature did not have a significant effect on the color ofthe fillets; (2) the optimal conditions were a ratio of 3:1, v/w between water and fish, a CO flow rate of 80 mL/min and 10 min CO injection followed by 5 min air exposure. Under these conditions, a higher a* value (redness 19.44) and a better sensory evaluation value (4.8) were obtained; and (3) the proposed method shortened processing time by 30-35 min, reduced the frequency of sterilization to only once, significantly lowered microbial counts from 82.33脳 102 to 56.33脳102 and reduced the CO requirement 25-fold, which has significant occupation, health, safety, and environmental implications.
鏉庢潵濂斤紝閮濇窇璐わ紝鍒佺煶寮猴紝宀戝墤浼燂紝鏉ㄨ搐搴?jiǎn)锛岀煶绾㈠Q岄檲鑳滃啗
褰卞搷鍥犲瓙錛?.389
Abstract: The conditions of color retention for tilapia fillets (O. niloticus鈾�脳 0. aureus鈾? treated by euthanatizing with reduced carbon monoxide (CO) were investigated. Live tilapias were first exposed to water saturated with CO. After a certain amount of CO-saturated water had been pumped through the gills, the tilapias were timely picked out and killed following the industry guidelines. The color value of fillets was measured by colorimeter to evaluate the color retention. The results showed that (1) temperature did not have a significant effect on the color ofthe fillets; (2) the optimal conditions were a ratio of 3:1, v/w between water and fish, a CO flow rate of 80 mL/min and 10 min CO injection followed by 5 min air exposure. Under these conditions, a higher a* value (redness 19.44) and a better sensory evaluation value (4.8) were obtained; and (3) the proposed method shortened processing time by 30-35 min, reduced the frequency of sterilization to only once, significantly lowered microbial counts from 82.33脳 102 to 56.33脳102 and reduced the CO requirement 25-fold, which has significant occupation, health, safety, and environmental implications.
鏉庢潵濂斤紝閮濇窇璐わ紝鍒佺煶寮猴紝宀戝墤浼燂紝鏉ㄨ搐搴?jiǎn)锛岀煶绾㈠Q岄檲鑳滃啗
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