Inactivation of Aspergillus sp. spores on whole black peppers by nonthermal plasma and quality evaluation of the treated peppers
Inactivation of Aspergillus sp. spores on whole black peppers by nonthermal plasma and quality evaluation of the treated peppers
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DOI：
10.1016/j.foodcont.2018.10.023
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发表时间：
2019-03
期刊：
影响因子：
6
通讯作者：
Takanori Tanino;Takuya Arisaka;Y. Iguchi;M. Matsui;T. Ohshima
中科院分区：
文献类型：
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作者：
Takanori Tanino;Takuya Arisaka;Y. Iguchi;M. Matsui;T. Ohshima
本研究设计了旋转低温等离子体(NTP)反应器，并对其在黑胡椒等干颗粒农产品微生物灭活中的实际应用进行了研究。将曲霉孢子作为旋转NTP反应器中灭活的目标微生物，人工接种到整个黑辣椒上。在几种条件下进行了灭活处理。旋转NTP反应器有利于黑椒上曲霉孢子的灭活，处理4 后，三级(3Log)的存活率下降。在旋转NTP反应器中使用加湿气体进行灭活处理，也有利于整个黑辣椒上曲霉孢子的灭活，而曲霉菌的孢子没有存活。在处理4 m in后检测到。从胡椒碱含量和抗氧化活性两个方面比较了NTP和干热处理全黑辣椒与未处理全黑辣椒的品质。NTP处理和干热处理的黑椒胡椒碱含量差异不显著，但NTP处理的辣椒的抗氧化活性高于干热处理的辣椒。
In this study, a rotating nonthermal plasma (NTP) reactor was designed and its practical use for the inactivation of microorganisms on dried granular agricultural products such as black pepper was investigated. As the target microorganism to inactivate in the rotating NTP reactor,Aspergillusspores were artificially inoculated on whole black peppers. Inactivation treatments were carried out under several conditions. Rotating the NTP reactor facilitated the inactivation of theAspergillusspores on the whole black peppers, and a decrease in the survival ratio of three orders (3 Log) was achieved after 4 min treatment. Using humidified gases for inactivation treatment in the rotating NTP reactor also facilitated the inactivation of theAspergillusspores on the whole black peppers, and no viable spores ofAspergillussp. were detected after 4 min treatment. The quality of the NTP- and dry-heat-treated whole black peppers was compared with that of untreated peppers in terms of the piperine content and antioxidative activity. The piperine contents of the NTP- and dry-heat-treated black peppers showed no significant difference, but the antioxidative activity in the NTP-treated peppers was higher than that in the dry-heat-treated peppers.