Lipid removal enhances separation of oat grain cell wall material from starch and protein

Juhani Sibakov, Olavi Myllymäki, Ulla Holopainen, Anu Kaukovirta-Norja, V. Hietaniemi, J.M. Pihlava, Kaisa Poutanen, Pekka Lehtinen

Research output: Contribution to journalArticleScientificpeer-review

67 Citations (Scopus)


Effects of lipid removal on the fine milling and air classification processing of oats were studied. Lipid removal by supercritical carbon dioxide (SC-CO2) extraction enabled concentration of the main components of oats – starch, protein, lipids and cell walls – into specific fractions. Using defatted oats as raw material, the highest β-glucan concentration of the cell wall-enriched fraction was 33.9% as compared to 17.1% without lipid removal. This was probably due to more efficient milling yielding smaller particles, and release of starchy material from cellular structures during milling of defatted oats, resulting in better classification. The removal of lipids also enabled separation of an oat protein concentrate with a protein concentration of 73.0% and a mass yield of 5.0%. A trial with 2310 kg of oat groats showed that the process based on defatting and dry fractionation was also industrially applicable.
Original languageEnglish
Pages (from-to)104-109
JournalJournal of Cereal Science
Issue number1
Publication statusPublished - Jul 2011
MoE publication typeA1 Journal article-refereed


  • Air classification
  • Beta-glucan
  • Oats
  • Supercritical carbon dioxide extraction


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