中文摘要：玉米赤霉烯酮(ZEN)和赭曲霉毒素A(OTA)是真菌产生的毒性次生代谢物，能污染各种食品和饲料。本文研究了臭氧处理ZEN和OTA的效果及处理后玉米品质的变化，发现用臭氧能有效降解玉米中的ZEN和OTA；降解效果随臭氧浓度和处理时间的增加而升高；在相同臭氧浓度和处理时间情况下，水分含量(MC)高(19.6%) 的处理效果比水分含量低(14.1%)的更好。为了评估处理后玉米的品质变化，用100 mg/l的臭氧，不同时长处理样品。结果发现，臭氧处理导致了玉米的MC下降；随着处理时间延长，玉米的白度和黄度分别升高和降低；处理180分钟后，玉米的脂肪酸值显著上升(p ≤ 0.05)。以上证明，臭氧能有效降解玉米中的ZEN和OAT，而对玉米品质的影响很小。
外文摘要：Zearalenone (ZEN) and ochratoxin A (OTA) are secondary toxic metabolites of fungi that can contaminate a wide range of food and feedstuff. In this study, the effects of ozone treatment on ZEN and OTA and the quality of ozonised corn are investigated. Ozone significantly affects ZEN and OTA solutions. ZEN was undetectable 5 s after being treated with 10 mg l–1 ozone. However, OTA was resistant to ozonation with a degradation rate of 65.4% after 120 s of treatment. Moreover, ZEN and OTA solutions were difficult to degrade after being dried by a nitrogen stream. Results showed that ozone effectively degraded ZEN and OTA in corn. The degradation rates of ZEN and OTA in corn increased with ozone concentration and treatment time. The degradation of ZEN and OTA at different ozone concentrations appropriately conformed to first-order kinetics with an R2 value > 0.8749. Furthermore, under the same conditions, corn with increased moisture content (MC) (19.6%) was more sensitive to ozone than corn with a low MC (14.1%). When treated with 100 mg l–1 ozone for 180 min, ZEN and OTA in corn with 19.6% MC decreased by 90.7% and 70.7%, respectively. To evaluate the quality of ozonised corn, subsequent quality experiments were conducted using corn samples treated at different times with 100 mg l–1 ozone. The MC of corn decreased after ozone treatment. The whiteness and yellowness of the corn increased and decreased with increasing time, respectively. The fatty acid value of the corn increased significantly (p ≤ 0.05) after 180 min of treatment. This study verified that ozone can effectively degrade ZEN and OTA in corn, but slightly affected corn quality.
外文关键词：Degradation；corn；zearalenone；ochratoxin A；ozone；quality
作者：Qi, LJ; Li, YL；Luo, XH；Wang, R；Zheng, RH；Wang, L；Li, YF；Yang, D；Fang, WM；Chen, ZX
作者单位：Jiangnan Univ
期刊名称：FOOD ADDITIVES AND CONTAMINANTS PART A-CHEMISTRY ANALYSIS
期刊影响因子：1.878
出版年份：2016
出版刊次：11
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