Indirect plasma treatment of fresh pork: Decontamination efficiency and effects on quality attributes
Indirect plasma treatment of fresh pork: Decontamination efficiency and effects on quality attributes
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DOI：
10.1016/j.ifset.2012.09.001
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发表时间：
2012-10-01
影响因子：
6.6
通讯作者：
Schlueter, O.
中科院分区：
文献类型：
--
作者：
Froehling, A.;Durek, J.;Schlueter, O.
大气压等离子体可以促进微生物灭活，同时由于低温操作而保持产品质量。间接等离子体处理为大规模应用提供了新的前景。本研究旨在确定间接等离子体处理对猪背最长肌（MLD）质量（颜色、pH值、荧光和反射率）和安全性（需氧活菌计数）的影响。微波等离子体装置（2.45 GHz，1.2 kW;工艺气体空气）用于新鲜猪MLD的间接等离子体处理，暴露时间为2 x 2.5或5 x 2 min。等离子体处理后，在5 ℃下储存20天期间，MLD的好氧活菌计数保持在10（2）和10（3）CFU/g之间。与未处理的肉样品相比，颜色测量显示等离子体处理后猪肉的a值增加，B值降低。反射率和荧光的测量显示处理之间存在明显差异。这项研究表明，间接等离子体处理净化新鲜猪肉的潜力，但必须考虑到质量的变化。为了在不影响产品质量的情况下显著减少微生物，并保证消费者的接受度，需要改进等离子体工艺设计。工业相关性文本：微生物安全是肉类行业的一个重要问题。特别是肉的质量不应受到灭活处理的影响，因此需要温和的灭活程序。间接大气压等离子体处理可以促进微生物灭活，并具有大规模操作的潜力。(C)2012爱思唯尔有限公司保留所有权利。
Atmospheric pressure plasma can facilitate microbiological inactivation while maintaining the product quality due to low temperature operation. Indirect plasma treatment offers new perspectives for large scale application. The aim of this study was to determine the impact of indirect plasma treatment on quality (color, pH, fluorescence, and reflectance) and safety (aerobic viable count) of porcine musculus longissimus dorsi (MLD). A microwave plasma setup (2.45 GHz, 1.2 kW; process gas air) was used for indirect plasma treatment of fresh porcine MLD with exposure times of 2 x 2.5 or 5 x 2 min. After plasma treatment the aerobic viable count of MLD remained between 10(2) and 10(3) CFU/g during the storage period of 20 days at 5 degrees C. Color measurements showed increased a values and decreased b values of pork meat after plasma treatment in comparison to untreated meat samples. The measurements of reflectance and fluorescence showed distinct differences between the treatments. This study shows the potential of indirect plasma treatment to decontaminate fresh pork but quality changes must be taken into consideration. Improved plasma process design is required to obtain significant microbial reduction without affecting the product quality and to guarantee consumer's acceptance.Industrial relevance text: Microbiological safety is an important issue in the meat industry. Especially meat quality should not be affected by the applied inactivation treatments so that gentle inactivation procedures are required. Indirect atmospheric pressure plasma treatment can facilitate microbiological inactivation and has the potential of large scale operation. (C) 2012 Elsevier Ltd. All rights reserved.