Effect of Enzymatic Application on Borage (Borago officinalis) Oil Extraction by Cold Pressing

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Synthesis of <I>γ</I>-linolenic acid (GLA) from linoleic acid (LA) is less than 10% in the human body. GLA is changed into di-homo-<I>γ</I>-linolenic acid (DHGLA), a prostaglandin 1 (PGE1) precursor. PGE1 has anti-inflammatory and anti-thrombotic properties. Due to these facts, supplements of GLA in a diet can alleviate the resulting health problems as platelet aggregation, arthritis and spleen constriction/dilation.<BR>Borage (<I>Borago officinalis</I>) seed has a high oil content (30% d.w.b.), which is the richest source of <I>γ</I>-linolenic acid (GLA), with 24% GLA. Cold pressing borage oil extraction, does not harm the final product quality, but its yield (about 77%) is lower than 100% yield of traditional oil extraction processes by solvent application. However, according to fibre composition (cellulose, 29% and 5.6% of pectin), it is possible to increase oil extraction yield, using enzymes with pectinases and cellulases activities prior to the pressing stage.<BR>In this work, press extraction of borage seed oil was evaluated using an enzymatic pretreatment. Nine commercial enzymes were studied individually and combined. Hydrolysis was performed at pre-selected conditions. Extraction yield was determined measuring the press-cake residual oil by the Soxhlet method.<BR>Best results have been obtained by Celluclast-Olivex (1:1) enzyme mixture (cellulase – pectinase), 84% extraction yield with 0.5% d.b. enzyme-substrate ratio. It is concluded that a preliminary enhancement of 8% oil recovery by enzymatic process is relevant due to borage oil’s high commercial value.

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  • Journal of chemical engineering of Japan

    Journal of chemical engineering of Japan 37(2), 326-331, 2004-02-01

    公益社団法人 化学工学会

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各種コード

  • NII論文ID(NAID)
    10013339576
  • NII書誌ID(NCID)
    AA00709658
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00219592
  • NDL 記事登録ID
    6863280
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z53-R395
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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