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首页> 外文期刊>International Journal of Food Science and Biotechnology >Potential of Soaking and Sun-Drying in Detoxifying Toxic Cassava Root Tubers
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Potential of Soaking and Sun-Drying in Detoxifying Toxic Cassava Root Tubers

机译：排毒木薯块茎的浸泡和晒干的潜力

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Root tubers of cassava (Manihot esculenta Crantz) have cyanogenic glucosides which liberate hydrogen cyanide (HCN) on hydrolysis in quantities that can be toxic to humans. As a result, several techniques have been used to detoxify the tubers including among others, soaking, sun-drying and fermentation which has been found to be the most effective. However, fermentation is associated with the growth of potentially mycotoxigenic moulds (fungi) which compromise the quality of the processed product hence suggesting the use of alternative mould free processing techniques like soaking and sun-drying. Therefore, this study investigated the potential of soaking and sun-drying in detoxifying root tubers of a toxic cassava variety, "Rutuga", (interpreted as "strangler") of cyanogens (total HCN, free HCN and bound HCN) in South Western Uganda. The cyanogens were determined by a standard titration method. The results indicated that soaking peeled cassava root tubers in cold distilled water for 4 days removed about 78% of bound HCN while sun-drying of peeled cassava chips for 5 days removed about 74% of free HCN. However, both methods are less effective in removing total HCN (soaking, 47%; sun-drying, 43%) due to the ineffectiveness of soaking and sun-drying in removing free HCN (21%) and bound HCN (3%) respectively. Hence a mixed approach employing both methods would be more appropriate in detoxifying cassava of total HCN.
机译：木薯块根（Manihot esculenta Crantz）具有氰基葡萄糖苷，在水解时会释放出氰化氢（HCN），其数量可能对人体有毒。结果，已使用多种技术对块茎进行解毒，其中包括最有效的浸泡，晒干和发酵。然而，发酵与潜在的致毒毒素的霉菌（真菌）的生长有关，霉菌损害了加工产品的质量，因此建议使用替代的无霉菌加工技术，例如浸泡和晒干。因此，这项研究调查了乌干达西南部有毒的木薯变种“ Rutuga”（被解释为“扼杀者”）的氰化物（总HCN，游离HCN和结合HCN）对根茎进行解毒的潜力。 。通过标准滴定法测定氰。结果表明，将去皮的木薯块茎在冷的蒸馏水中浸泡4天可去除约78％的结合HCN，而将去皮的木薯片晒干5天可去除约74％的游离HCN。但是，这两种方法均不能有效去除总HCN（浸泡，占47％;日晒，占43％），因为浸泡和晒干对分别去除游离HCN（占21％）和结合的HCN（占3％）无效。 。因此，采用两种方法的混合方法将更适合于将木薯中的全部HCN解毒。

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