Sự thay đổi về tính chất vật lý, hóa học và khả năng bảo quản của thịt bò thượng hạng được ướp khô sử dụng hệ thống làm lạnh điện trường

Foods - Tập 11 Số 11 - Trang 1539
Kyu-Min Kang1, Sol-Hee Lee1, Hack-Youn Kim1
1Department of Animal Resources Science, Kongju National University, Yesan 32439, Chungnam, Korea

Tóm tắt

Mục tiêu của nghiên cứu này là xác định thời gian ướp khô thịt thăn bò trong hệ thống làm lạnh điện trường. Thịt thăn bò (tiêu chuẩn chất lượng Hàn Quốc cấp 2) được ướp khô ở nhiệt độ 0, −1 và −2 °C trong hệ thống làm lạnh điện trường (vận tốc không khí, 5 ± 2 m/s) và quá trình ướp ngừng lại khi giá trị tổng số vi khuẩn (TPC) đạt 7 log CFU/g. Các mẫu được kiểm tra bằng cách đo hiệu suất ướp, hiệu suất tỉa, pH, màu sắc, khả năng giữ nước (WHC), hiệu suất nấu, lực xé, tổng số vi khuẩn (TPC), các chất phản ứng với axit 2-thiobarbituric (TBARS) và nitơ cơ bản bay hơi (VBN). Kết quả cho thấy hiệu suất ướp, hiệu suất tỉa, độ đỏ, độ vàng và độ sắc giảm khi thời gian ướp khô tăng lên. Ngược lại, pH, độ sáng, góc màu, WHC và hiệu suất nấu tăng khi thời gian ướp khô tăng. Trong lực xé, giá trị thấp nhất đạt được ở tuần thứ tư tại tất cả các nhiệt độ. Kết quả TPC, TBARS và VBN đều tăng theo thời gian ướp, trong đó VBN ở tuần thứ 6 tại nhiệt độ 0 °C và tuần thứ 9 tại −1 °C vượt quá giá trị tiêu chuẩn (20 mg/100 g), trong khi nhiệt độ ướp khô có tác động đến các đặc tính vật lý hóa học và khả năng bảo quản, với nhiệt độ thấp hơn cho thấy tốc độ tiến triển chậm hơn. Do đó, việc ướp khô trong hệ thống làm lạnh điện trường có thể được sử dụng tối đa trong 4 tuần tại 0 °C, 8 tuần tại −1 °C và 10 tuần tại −2 °C. Tuy nhiên, xét về các đặc tính vật lý hóa học, 4 tuần ở mỗi nhiệt độ là phù hợp để sản xuất thịt bò thăn ướp khô mềm.

Từ khóa


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