Characterization of lipids and lignans in brewer's spent grain and its enzymatically extracted fraction

Piritta Niemi, Tarja Tamminen, Annika Smeds, Kaarina Viljanen, Taina Ohra-aho, Ulla Holopainen-Mantila, Craig B. Faulds, Kaisa Poutanen, Johanna Buchert

    Tutkimustuotos: LehtiartikkeliArtikkeliTieteellinenvertaisarvioitu

    52 Sitaatiot (Scopus)

    Abstrakti

    Brewer's spent grain (BSG), the major side stream of brewing, consists of the husks and the residual parts of malts after the mashing process. BSG was enzymatically fractionated by a two-step treatment with carbohydrate- and protein-degrading enzymes, which solubilized 66% of BSG. BSG contained 11% lipids, which were mostly triglycerides, but also a notable amount of free fatty acids was present. Lipids were mostly solubilized due to the alkaline pH applied in the protease treatment. The main fatty acids were linoleic, palmitic, and oleic acids. Several lignans were identified in BSG, syringaresinol and secoisolariciresinol being the most abundant, many associated with the cell wall matrix and released by the alkaline-protease treatment.
    AlkuperäiskieliEi tiedossa
    Sivut9910–9917
    Sivumäärä8
    JulkaisuJournal of Agricultural and Food Chemistry
    Vuosikerta60
    Numero39
    DOI - pysyväislinkit
    TilaJulkaistu - 2012
    OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

    Keywords

    • brewer's spent grain
    • enzymatic solubilization
    • lignan
    • lipid

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