title: Production of trans-free margarine stock by enzymatic interesterification of rice bran oil, palm stearin and coconut oil.
abstract: BACKGROUND
  Trans-free interesterified fat was produced for possible usage as a spreadable margarine stock. Rice bran oil, palm stearin and coconut oil were used as substrates for lipase-catalyzed reaction.
  
  
  RESULTS
  After interesterification, 137-150 g kg(-1) medium-chain fatty acid was incorporated into the triacylglycerol (TAG) of the interesterified fats. Solid fat contents at 25 degrees C were 15.5-34.2%, and slip melting point ranged from 27.5 to 34.3 degrees C. POP and PPP (beta-tending TAG) in palm stearin decreased after interesterification. X-ray diffraction analysis demonstrated that the interesterified fats contained mostly beta' polymorphic forms, which is a desirable property for margarines.
  
  
  CONCLUSIONS
  The interesterified fats showed desirable physical properties and suitable crystal form (beta' polymorph) for possible use as a spreadable margarine stock. Therefore, our result suggested that the interesterified fat without trans fatty acid could be used as an alternative to partially hydrogenated fat.
authors.affiliation: Department of Food Science and Technology, Chungnam National University, Taejeon 305-764, South Korea.
authors.forename: Prakash
authors.initials: P
authors.lastname: Adhikari
authors.forename: Jung-Ah
authors.initials: JA
authors.lastname: Shin
authors.forename: Jeung-Hee
authors.initials: JH
authors.lastname: Lee
authors.forename: Jiang-Ning
authors.initials: JN
authors.lastname: Hu
authors.forename: Xue-Mei
authors.initials: XM
authors.lastname: Zhu
authors.forename: Casimir C
authors.initials: CC
authors.lastname: Akoh
authors.forename: Ki-Teak
authors.initials: KT
authors.lastname: Lee
mesh_terms: D003059:Cocos / Q000737:chemistry; D032462:Cycadopsida / Q000737:chemistry; D004951:Esterification; D005227:Fatty Acids / Q000737:chemistry / Q000378:metabolism*; D005524:Food Technology / Q000379:methods*; D008049:Lipase / Q000378:metabolism; D008383:Margarine; D012275:Oryza / Q000737:chemistry; D010938:Plant Oils / Q000378:metabolism*; D010940:Plant Proteins / Q000378:metabolism; D044242:Trans Fatty Acids; D014280:Triglycerides / Q000378:metabolism*; D014961:X-Ray Diffraction
chemical_list: D005227:Fatty Acids; D010938:Plant Oils; D010940:Plant Proteins; D044242:Trans Fatty Acids; D014280:Triglycerides; D008383:Margarine; D008049:Lipase