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首页> 美国卫生研究院文献>Foods >Safety of Yam-Derived (Dioscorearotundata) Foodstuffs—Chips Flakes and Flour: Effect of Processing and Post-Processing Conditions
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Safety of Yam-Derived (Dioscorearotundata) Foodstuffs—Chips Flakes and Flour: Effect of Processing and Post-Processing Conditions

机译：山药衍生的安全性（Dioscorearotundata）食品—薄片薄片和面粉：加工条件和后加工条件的影响

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The production of yam-derived (Dioscorea rotundata) foodstuffs is mainly performed by small and medium scale processors that employ old traditional methods. This can lead to differences in quality from processor to processor, and from location to location, with consequent safety concerns. As such, the effects of processing and post-processing phases (i.e., storage, transport, etc.) on the safety of some yam-derived foodstuffs—namely chips, flakes, and flour—has been evaluated, with a focus on bacterial and fungal contamination, aflatoxins, pesticides, and heavy metals (Pb, Ni, Cd and Hg). Yams harvested and processed in Nigeria were screened, being that the country is the largest producer of the tuber, with 70–75% of the world production. Results highlighted no presence of pesticides, however, many samples showed high levels of bacterial and fungal contamination, together with heavy metal concentrations above the recommended safety levels. No trend was observed between the items considered; it was noticed, however, that samples purchased from the markets showed higher contamination levels than those freshly produced, especially regarding bacterial and aflatoxins presence. The processing stage was identified as the most critical, especially drying. Nonetheless, post-processing steps such as storage and handling at the point of sale also contributed for chemical contamination, such as aflatoxin and heavy metals. The results suggested that both the processing and post-processing phases have an impact on the safety of yam chips, flakes, and flour.
机译：薯类（Dioscorea rotundata）食品的生产主要由采用旧传统方法的中小型加工商完成。这可能会导致处理器之间以及位置与位置之间的质量差异，从而带来安全隐患。因此，已经评估了加工和后加工阶段（即储存，运输等）对某些山药衍生食品（即薯片，薄片和面粉）安全性的影响，重点是细菌和细菌。真菌污染，黄曲霉毒素，农药和重金属（铅，镍，镉和汞）。对尼日利亚收获和加工的山药进行了筛选，因为该国是最大的块茎生产国，占世界产量的70-75％。结果表明没有农药存在，但是，许多样品显示出高水平的细菌和真菌污染，以及重金属浓度超过建议的安全水平。在所考虑的项目之间没有观察到趋势；但是，要注意的是，从市场上购买的样品显示出比新鲜生产的样品更高的污染水平，尤其是关于细菌和黄曲霉毒素的存在。加工阶段被认为是最关键的，尤其是干燥。尽管如此，诸如销售点的存储和处理之类的后处理步骤也造成了化学污染，例如黄曲霉毒素和重金属。结果表明，加工和后加工阶段均对薯片，薄片和面粉的安全性产生影响。

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