title: Lipase catalyzed interesterification of palm stearin and rice bran oil blends for preparation of zero trans shortening with bioactive phytochemicals.
abstract: Palm stearin (PS) and rice bran oil (RBO) blends of varying proportions were subjected to enzymatic interesterification (EIE) using a 1,3 specific immobilized lipase. The interesterified blends were evaluated for their physicochemical characteristics and bioactive phytochemical contents using differential scanning calorimeter (DSC), X-ray diffraction (XRD), gas chromatography (GC) and high performance liquid chromatography (HPLC). The blends of PS and RBO in different proportions (40:60, 50:50, 60:40 and 70:30) had saturated fatty acid content and unsaturated fatty acid content in the range of 37.6-52.0% and 48.0-62.4%, respectively. The blends 40:60, 50:50 and 60:40 showed a considerable reduction in their highest melt peak temperature (TP) and solid fat content (SFC) on EIE. The interesterified blends retained bioactive phytochemicals like tocols (839-1172 ppm), sterols (4318-9647 ppm), oryzanols (3000-6800ppm) and carotene (121-180 ppm). XRD studies demonstrated that the interesterified blends contained beta and beta' polymorphic forms.
authors.affiliation: National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Trivandrum 695 019, India.
authors.forename: M V
authors.initials: MV
authors.lastname: Reshma
authors.forename: S S
authors.initials: SS
authors.lastname: Saritha
authors.forename: C
authors.initials: C
authors.lastname: Balachandran
authors.forename: C
authors.initials: C
authors.lastname: Arumughan
mesh_terms: D028023:Arecaceae / Q000378:metabolism*; D001688:Biological Products / Q000378:metabolism*; D002151:Calorimetry; D002338:Carotenoids / Q000378:metabolism; D002384:Catalysis; D003460:Crystallization; D004042:Dietary Fats, Unsaturated / Q000138:chemical synthesis*; D004951:Esterification; D005658:Fungi / Q000201:enzymology*; D007455:Iodine; D008049:Lipase / Q000378:metabolism*; D010666:Phenylpropionates / Q000378:metabolism; D010840:Phytosterols / Q000378:metabolism; D010938:Plant Oils / Q000378:metabolism*; D000073879:Rice Bran Oil; D013228:Stearates / Q000378:metabolism*; D013696:Temperature
chemical_list: D001688:Biological Products; D004042:Dietary Fats, Unsaturated; D010666:Phenylpropionates; D010840:Phytosterols; D010938:Plant Oils; D013228:Stearates; D002338:Carotenoids; D007455:Iodine; D008049:Lipase; D000073879:Rice Bran Oil; C013172:gamma-oryzanol