Lipase catalyzed interesterification of palm stearin and rice bran oil blends for preparation of zero trans shortening with bioactive phytochemicals.

Autor: Reshma MV; National Institute for Interdisciplinary Science and Technology, Council of Scientific and Industrial Research, Trivandrum 695 019, India., Saritha SS, Balachandran C, Arumughan C
Jazyk: angličtina
Zdroj: Bioresource technology [Bioresour Technol] 2008 Jul; Vol. 99 (11), pp. 5011-9. Date of Electronic Publication: 2007 Oct 18.
DOI: 10.1016/j.biortech.2007.09.009
Abstrakt: 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.
Databáze: MEDLINE
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