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    Methods of processing of some under-utilized yam and cocoyam tuber varieties: effect on carotenoid content

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    Authors
    Ukom, A.N.
    Ojimelukwe, P.C.
    Alamu, E.O.
    Date
    2016
    Language
    en
    Type
    Journal Article
    Review status
    Peer Review
    Accessibility
    Limited Access
    Metadata
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    Citation
    Ukom, A.N., Ojimelukwe, P.C. & Alamu, E. (2016). Methods of processing of some under-utilized yam and cocoyam tuber varieties: effect on carotenoid content. Journal of Advances in Food Science & Technology, 3(1), 11-20.
    Permanent link to cite or share this item: http://hdl.handle.net/10568/77139
    Abstract/Description
    Identification and quantification of carotenoids from yam and cocoyam were evaluated after different processing methods. Seven carotenoids were identified by HPLC-DAD both in the raw and processed tubers. The mean carotenoids in yam, D. cayenensis was α-carotene (0.78 μg/g), 9-cis-β-carotene (0.71 μg/g), all-trans-β-carotene (1.28 μg/g); in D. bulbifera was lutein (1.53 μg/g), 9-cis-β-carotene (0.39 μg/g), all-trans-β-carotene (0.19 μg/g). Cocoyam, X. maffa (Scoth) had lutein (0.95 μg/g), α-carotene (1.35 μg/g), 9-cis-β-carotene (0.78 μg/g) and all-trans-β-carotene (1.91 μg/g). The impact of methods of processing show that the loss of 9-cis-β-carotene and/or all-trans β-carotene in the boiled process was associated with increase in 13-cis-β-carotene in the yam/cocoyam samples. Roasted method show minimal loss of carotenoids when compared with fried and oven-dried methods. Mean percentage retention of total carotenoids after processing was boiling (80.1%), roasting (79%), oven-drying (24.51%) and frying (15%). There was relative good retention of total carotenoids in the boiled and roasted process to improve human nutrition.
    Notes
    First Published: 11th November 2015
    CGIAR Affiliations
    Roots, Tubers and Bananas
    AGROVOC Keywords
    CAROTENOIDS; YAM; COCOYAM
    Subjects
    YAM
    Countries
    NIGERIA
    Regions
    AFRICA; WEST AFRICA
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    • IITA Journal Articles [1807]
    • RTB Journal Articles [656]

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