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Enzymatic Synthesis of Low Trans Fats Using Rice Bran Oil, Palm Stearin and High Oleic Sunflower Seed Oil

미강유, 팜스테아린 및 고올레인산 해바라기씨유를 이용한 저트랜스 유지의 효소적 합성

  • 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 : 2009.04.30

Abstract

Low trans fats were synthesized by interesterification of rice bran oil (RBO), palm stearin (PS) and high oleic sunflower seed oil (HO) using TLIM from Thermomyces lanuginosa. After 24-h reaction, physicochemical characteristics such as fatty acid and triacylglycerol composition, solid fat content, melting point, tocopherol, oryzanol and phytosterol contents were evaluated. Trans fatty acid contents of the produced low-trans fats showed less than 0.5 wt%. Mostly, triacylglycerol species in the products were palmitoyl-linoleoyl-oleoyl-glycerol (PLO), palmitoyl-oleoyl-oleoyl-glycerol (POO) and palmitoyl-oleoyl-palmitoyl-glycerol (POP). Total tocopherol contents ranged from 6.94 to 11.83 mg/100 g while $0.18{\sim}0.49$ mg/100 g of $\gamma$-oryzanol and $182.47{\sim}269.08$ mg/100 g of phytosterols were observed depending on the substrates ratios. When the content of PS in the reaction substrate was increased, solid fat content and slip melting points were increased.

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