Production of Human Milk Fat Analogue Containing Docosahexaenoic and Arachidonic Acids

Turan D., Şahin Yeşilçubuk N., Akoh C. C.

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, vol.60, no.17, pp.4402-4407, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 60 Issue: 17
  • Publication Date: 2012
  • Doi Number: 10.1021/jf3012272
  • Journal Name: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.4402-4407
  • Keywords: human milk fat analogue, ARA, DHA, hazelnut oil, interesterification, Lipozyme RM IM, LIPASE-CATALYZED ACIDOLYSIS, ENZYMATIC PRODUCTION, OXIDATIVE STABILITY, STEARIDONIC ACID, PALMITIC ACID, SN-2 POSITION, HAZELNUT OIL, STRUCTURED LIPIDS, OLEIC-ACID, SUBSTITUTES
  • Istanbul Technical University Affiliated: Yes

Abstract

Human milk fat (HMF) analogue containing docosahexaenoic acid (DHA) and arachidonic acid (ARA) at sn-1,3 positions and palmitic acid (PA) at sn-2 position was produced. Novozym 435 lipase was used to produce palmitic acid-enriched hazelnut oil (EHO). EHO was then used to produce the final structured lipid (SL) through interesterification reactions using Lipozyme RM IM. Reaction variables for 3 h reactions were temperature, substrate mole ratio, and ARASCO/DHASCO (A:D) ratio. After statistical analysis of DHA, ARA, total PA, and PA content at sn-2 position, a large-scale production was performed at 60 degrees C, 3:2 A:D ratio, and 1:0.1 substrate mole ratio. For the SL, those results were determined as 57.3 +/- 0.4%, 2.7 +/- 0.0%, 2.4 +/- 0.1%, and 66.1 +/- 2.2%, respectively. Tocopherol contents were 84, 19, 85, and 23 mu g/g oil for alpha-, beta-, gamma-, and delta-tocopherol. Melting range of SL was narrower than that of EHO. Oxidative stability index (OSI) value of SL (0.80 h) was similar to that of EHO (0.88 h). This SL can be used in infant formulas to provide the benefits of ARA and DHA.