Effects of Electron Beam Irradiation on Zearalenone and Ochratoxin A in Naturally Contaminated Corn and Corn Quality Parameters.
Effects of Electron Beam Irradiation on Zearalenone and Ochratoxin A in Naturally Contaminated Corn and Corn Quality Parameters.
复制标题
电子束辐照对自然污染玉米中玉米赤霉烯酮和赭曲霉毒素A及玉米品质参数的影响
DOI：
10.3390/toxins9030084
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发表时间：
2017-02-27
期刊：
影响因子：
4.2
通讯作者：
Chen Z
中科院分区：
文献类型：
--
作者：
Luo X;Qi L;Liu Y;Wang R;Yang D;Li K;Wang L;Li Y;Zhang Y;Chen Z
玉米赤霉烯酮（ZEN）和赭曲霉毒素A（OTA）是广泛存在于粮食和粮食制品中的次生毒性代谢产物。研究了电子束辐照对玉米中ZEN和OTA含量及辐照玉米品质的影响。结果表明，EBI显著影响ZEN和OTA。在10 kGy辐照下，ZEN和OTA的降解率分别为65.6%和75.2%。初始量显著影响降解速率。玉米中ZEN和OTA的降解率随辐照剂量的增加而降低，在50 kGy辐照剂量下，ZEN和OTA的降解率分别为71.1%和67.9%。ZEN和OTA在玉米籽粒中比在玉米粉中更易降解。水分含量（MC）在ZEN和OTA降解中起着至关重要的作用。高MC归因于高ZEN和OTA降解。根据辐照剂量对辐照玉米的品质进行了评价。L* 值变化，但这种变化不显著（p > 0.05）。而a* 和B* 则随照射剂量的增加而显著降低（p < 0.05）。脂肪酸值显著增加。糊化特性，包括峰值粘度、谷值粘度、崩解值粘度、最终粘度和消减粘度，也显著降低（p < 0.05）。本研究证实了EBI能有效降解玉米中的ZEN和OTA。辐射也会影响玉米的品质。
Zearalenone (ZEN) and ochratoxin A (OTA) are secondary toxic metabolites widely present in grains and grain products. In this study, the effects of electron beam irradiation (EBI) on ZEN and OTA in corn and the quality of irradiated corn were investigated. Results indicated that EBI significantly affected ZEN and OTA. The degradation rates of ZEN and OTA at 10 kGy in solution were 65.6% and 75.2%, respectively. The initial amounts significantly affected the degradation rate. ZEN and OTA in corn were decreased by the irradiation dose, and their degradation rates at 50 kGy were 71.1% and 67.9%, respectively. ZEN and OTA were more easily degraded in corn kernel than in corn flour. Moisture content (MC) played a vital role in ZEN and OTA degradation. High MC was attributed to high ZEN and OTA degradation. The quality of irradiated corn was evaluated on the basis of irradiation dose. L* value changed, but this change was not significant (p > 0.05). By contrast, a* and b* decreased significantly (p < 0.05) with irradiation dose. The fatty acid value increased significantly. The pasting properties, including peak, trough, breakdown, and final and setback viscosities, were also reduced significantly (p < 0.05) by irradiation. Our study verified that EBI could effectively degrade ZEN and OTA in corn. Irradiation could also affect corn quality.