The oxidative stability of microalgae oil (Schizochytrium aggregatum) and its antioxidant activity after simulated gastrointestinal digestion: Relationship with constituents

文献类型： 外文期刊

第一作者： Lv, Junwei

作者： Lv, Junwei;Yang, Xianqing;Ma, Haixia;Hu, Xiao;Wei, Ya;Zhou, Wanjun;Li, Laihao;Lv, Junwei

作者机构：

关键词： Antioxidant ability;Constituents;DHA;Gastrointestinal digestion;Microalgae oil

期刊名称：EUROPEAN JOURNAL OF LIPID SCIENCE AND TECHNOLOGY （ 影响因子：2.679； 五年影响因子：2.627 ）

ISSN：

年卷期：

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收录情况： SCI

摘要： The objective of this study was to examine the chemical composition and oxidative stability of microalgae oil, also to explore in vitro bioaccessibility and antioxidant activity of microalgae oil after simulated gastrointestinal digestion. In total, more than 50 fatty acids were identified by GC-MS analysis, with both palmitic acid (38.3%) and DHA (34.5%) being identified as major fatty acids. The contents of total phenolics and flavonoids in the various solvent extracts were measured spectrometrically, and their amounts were 39.33 +/- 0.34 mu g gallic acid/g and 16.08 +/- 4.3 mu g rutin/g, respectively. HPLC analysis showed that the contents of beta-carotene, alpha-tocopherols, beta- and gamma-tocopherols (not separated) and delta-tocopherols were 136 mu g/100g, 164.4 mu g/g, 317.3 mu g/g, and 43.2 mu g/g, respectively. Concerning sterols, cholesterol was the principal sterol at 4210.5 mg/kg and the other six main sterols were campesterol (121.4 mg/kg), 24-methylene cholesterol (192.8 mg/kg), 24-methyl-colest-7-en-3 beta-ol (144.6 mg/kg), ergosterol (144.8 mg/kg), stigmasterol (260.1 mg/kg) and Delta 7,24-stigmastadienol (150.5 mg/kg), respectively. The overall chemical properties of the tested oils indicated that microalgae oil had a great oil quality. A Schaal oven test was used to evaluate the oxidative stability of microalgae oil. Furthermore, in vitro simulated gastrointestinal digestion was performed, and the antioxidant ability of digestion oil was determined by using a 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical-scavenging assay, a 3-ethylbenzothiazoline-6-sulfonic acid (ABTS) radical cation decolourisation activity assay, a reducing power assay, a beta-carotene bleaching assay and an oxygen radical absorbance capacity (ORAC) antioxidant assay. The results showed that following simulated gastrointestinal digestion, microalgae oil displayed a good in vitro bioaccessibility and moderate antioxidant capacity. Thus, the antioxidant activity of the microalgae oil was mainly contributed by its abundant antioxidant constituents.

分类号： TQ645`TS22

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