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首页> 外文期刊>Nutrition & Food Science >Anti-nutritional factors, zinc, iron and calcium in some Caribbean tuber crops and the effect of boiling or roasting.
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Anti-nutritional factors, zinc, iron and calcium in some Caribbean tuber crops and the effect of boiling or roasting.

机译：抗营养因子，某些加勒比块茎作物中的锌，铁和钙以及煮沸或烘烤的作用。

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Purpose - This study aims to investigate the levels of some anti-nutritional factors and minerals and the effect of boiling or roasting on selected commonly consumed Caribbean tuber crops. Design/methodology/approach - Three commonly consumed tuber crops in the Caribbean namely: Yellow yam (Dioscorea cayenensis), Cocoyam (Xanthosoma sp.) and Sweet potato (Ipomea batatas) were harvested from farmers' field in the Parish of Manchester, Jamaica and assessed in their boiled, raw and roasted forms for levels of some anti-nutritional factors and minerals. Findings - Zinc and iron levels were highest in raw Yellow yam, while the highest levels of calcium were observed in Sweet potato. The phytic acid to zinc molar ratio was higher than 15 in all the tuber crops in their raw and roasted forms. Boiling reduced this ratio to below 15 for Yellow yam and Cocoyam but still remained above 15 for Sweet potato. Cyanoglucoside level was highest in raw Sweet potato followed by Yellow yam and Cocoyam. Boiling or roasting reduced the levels of cyanoglucosides. Roasting greatly lowered the level of trypsin inhibitor activity compared to boiling. The highest level of trypsin inhibitor activity was recorded in the raw tubers, and slight reductions were observed upon processing. Practical implications - Trypsin inhibitor was more stable to heat treatment compared to similar tubers grown in Africa. It may be beneficial to isolate and characterize trypsin inhibitor in these Caribbean tuber crops for utilization in nutraceutics. Originality/value - This study shows that the two traditional processing methods were effective in lowering the levels of anti-nutritional factors..
机译：目的-这项研究旨在研究某些抗营养因子和矿物质的含量以及煮沸或烘烤对选定的常用食用加勒比块茎作物的影响。设计/方法/方法-加勒比地区三种常用的块茎作物：黄山药（Dioscorea cayenensis），可可粉（Xanthosoma sp。）和甘薯（Ipomea batatas）从曼彻斯特，牙买加和以煮，生和烤形式评估某些抗营养因子和矿物质的含量。结果-生山药中的锌和铁含量最高，而甘薯中的钙含量最高。在所有块茎农作物中，无论其原始形式还是烘烤形式，植酸与锌的摩尔比都高于15。煮沸后，黄薯和可可粉的比例降至15以下，但甘薯仍保持在15以上。未加工的甘薯中的氰基葡萄糖苷水平最高，其次是黄薯和可可粉。煮沸或烘烤降低了氰基葡萄糖苷的含量。与煮沸相比，焙烧大大降低了胰蛋白酶抑制剂的活性水平。在生块茎中记录了最高水平的胰蛋白酶抑制剂活性，并且在加工后观察到轻微的降低。实际意义-与非洲生长的类似块茎相比，胰蛋白酶抑制剂对热处理更稳定。在这些加勒比块茎作物中分离和鉴定胰蛋白酶抑制剂以用于营养学可能是有益的。原创性/价值-这项研究表明，两种传统的加工方法可有效降低抗营养因子的水平。

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