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Characterization of Scaled-up Low-Trans Shortening from Rice Bran Oil and High Oleic Sunflower Seed Oil with Batch Type Reactor

회분식반응기를 이용한 미강유, 팜스테아린과 고올레인산 해바라기씨유 유래 대량 제조된 저트랜스 쇼트닝의 특성 연구

  • Kim, Ji-Young (Dept. of Food Science and Technology, Chungnam National University) ;
  • Lee, Ki-Teak (Dept. of Food Science and Technology, Chungnam National University)
  • Published : 2009.03.31

Abstract

Scaled-up low-trans shortening (LTS) was produced by lipase-catalyzed interesterification. Blend of rice bran oil (RBO), palm stearin (PS) and high oleic sunflower seed oil (HO) with 1:2:0.9 (w/w/w) ratio was interesterified using immobilized lipase from Thermomyces lanuginosus (TLIM) in the batch type reactor at $65^{\circ}C$ for 24 hr, and physicochemical melting properties of LTS were compared with commercial shortening. Solid fat content (SFC) of commercial shortening (used as control) and LTS was similar at 9.56 and 8.77%, respectively, at $35^{\circ}C$. Major fatty acids in LTS were C16:1 (33.7 wt%), C18:1 (45.7 wt%) and C18:2 (13.4 wt%). Trans fatty acid content in the commercial shortening (4.8 wt%) was higher than that of LTS (0.5 wt%). After reverse-phase HPLC analysis, major triacylglycerol (TAG) species in LTS were POO, POP and PLO. Total tocopherol, ${\gamma}$-oryzanol and phytosterol contents in the LTS were 12.37, 0.43 and 251.38 mg/100 g, respectively. Hardness of LTS was similar to that of commercial shortening. Also, x-ray diffraction analysis showed coexistence of ${\beta}'$ and ${\beta}$ form in the LTS.

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