High-temperature treatment of the surimi gels was carried out in an electric/steam amphibious sterilization retort (JINDING Food Machinery Co., Ltd., Zhucheng, Shandong, China). The desired
temperature was preset in order to control and ensure the accuracy of the sterilization temperature. After sterilization, the temperature was cooled down by closing the steam source and starting the supply of cooling water into the spray tube. During the entire sterilization process, a counter pressure, which was realized by adding compressed air into the retort to provide pressure identical to that inside the surimi gels, was used to prevent the swelling of
the casing; this counter pressure was also preset. The surimi gels were heated under the same counter pressure (0.12 MPa) until their central temperature reached 120 1 C, and the gels were kept at that temperature for 30 min. The temperature was monitored by Ellab TrackSense-Pro purchased from Henglv Engineering Co., Ltd., Hubei, China. Additionally, all samples were heated in water bath at 90 C for 30 min as a comparison with high-temperature treatment.The samples were then chilled in ice water and kept refrigerated (4 C) until tested.
High-temperature treatment of the surimi gels was carried out in an electric/steam amphibious sterilization retort (JINDING Food Machinery Co., Ltd., Zhucheng, Shandong, China). The desiredtemperature was preset in order to control and ensure the accuracy of the sterilization temperature. After sterilization, the temperature was cooled down by closing the steam source and starting the supply of cooling water into the spray tube. During the entire sterilization process, a counter pressure, which was realized by adding compressed air into the retort to provide pressure identical to that inside the surimi gels, was used to prevent the swelling ofthe casing; this counter pressure was also preset. The surimi gels were heated under the same counter pressure (0.12 MPa) until their central temperature reached 120 1 C, and the gels were kept at that temperature for 30 min. The temperature was monitored by Ellab TrackSense-Pro purchased from Henglv Engineering Co., Ltd., Hubei, China. Additionally, all samples were heated in water bath at 90 C for 30 min as a comparison with high-temperature treatment.The samples were then chilled in ice water and kept refrigerated (4 C) until tested.
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