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Effects of Extraction Methods on Tea Seed Oil Quality and Physicochemical Characterization of Prepared Oleogels
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Lele LIU1, Yao PAN2, *, Hongyan LI1, *
Science and Technology of Food Industry | 2026, 47(7) : 103 - 113
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Science and Technology of Food Industry | 2026, 47(7): 103-113
• Research and Investigation •
Effects of Extraction Methods on Tea Seed Oil Quality and Physicochemical Characterization of Prepared Oleogels
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Lele LIU1, Yao PAN2, *, Hongyan LI1, *
Affiliations
  • 1State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China
  • 2School of Public Health, Nanchang University, Nanchang 330019, China
Published: 2026-04-01 doi: 10.13386/j.issn1002-0306.2025030169
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This study investigated the effects of hot pressing, solvent extraction, aqueous extraction, and aqueous enzymatic extraction on the quality of tea seed oil (TSO) and systematically characterized the physicochemical properties of oleogels prepared using monoglyceride (MG), beeswax (BW), rice bran wax (RBW), and γ-oryzanol/β-sitosterol (SO) as structuring agents. Results indicated that the fatty acid composition of TSO remained consistent across extraction methods, predominantly comprising oleic acid, linoleic acid, palmitic acid, and stearic acid. Solvent extraction achieved the highest yield (94.92%±2.68%), with lower acid value (0.46±0.01 mg KOH/g) and peroxide value (0.03±0.00 g/100 g), along with higher α-tocopherol (249.78±15.84 mg/kg) and squalene (186.56±10.99 mg/kg) contents. However, it exhibited lower total phenolics (111.11±8.96 mg GAE/kg) and total sterols (3695.82±215.45 mg/kg). In contrast, aqueous enzymatic extraction yielded 85.55%±3.64% oil, with comparable acid value (0.59±0.01 mg KOH/g), peroxide value (0.02±0.00 g/100 g), α-tocopherol (225.91±13.75 mg/kg), total phenolics (144.58±2.87 mg GAE/kg), and squalene (177.96±1.48 mg/kg) to solvent extraction (all P>0.05). Notably, it demonstrated significantly higher phytosterol content (4867.15±265.33 mg/kg) and environmental compatibility, establishing it as the optimal method for balancing extraction efficiency, bioactive retention, and sustainability. All four oleogels exhibited oil-binding capacities exceeding 93%. MG- and SO-based oleogels involved van der Waals forces and hydrogen bonding, while BW and RBW oleogels relied solely on van der Waals interactions. X-ray diffraction revealed β and β′ polymorphs in MG, BW, and RBW oleogels, whereas SO oleogels exclusively formed β crystals. Texture analysis indicated that SO oleogels exhibited the highest oil-binding capacity (99.23%±1.68%) and hardness (5497.80±508.83 g) but poor spreadability. Conversely, MG oleogels balanced moderate hardness (746.47±58.29 g) and oil retention (97.80%±1.39%), rendering them suitable for solid fat replacement. In conclusion, aqueous enzymatic extraction is the preferred method for TSO production, and MG-based oleogel shows optimal potential as a solid fat substitute in food applications.

tea seed oil  /  extraction process  /  aqueous enzymatic extraction  /  oleogel  /  physicochemical properties
刘乐乐, 潘瑶, 李红艳. 提取方式对茶叶籽油品质的影响及其油凝胶的制备与理化性质表征. 食品工业科技, 2026 , 47 (7) : 103 -113 . DOI: 10.13386/j.issn1002-0306.2025030169
Lele LIU, Yao PAN, Hongyan LI. Effects of Extraction Methods on Tea Seed Oil Quality and Physicochemical Characterization of Prepared Oleogels[J]. Science and Technology of Food Industry, 2026 , 47 (7) : 103 -113 . DOI: 10.13386/j.issn1002-0306.2025030169
Year 2026 volume 47 Issue 7
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doi: 10.13386/j.issn1002-0306.2025030169
  • Receive Date:2025-03-13
  • Online Date:2026-10-24
  • Published:2026-04-01
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  • Received:2025-03-13
Affiliations
    1State Key Laboratory of Food Science and Resources, Nanchang University, Nanchang 330047, China
    2School of Public Health, Nanchang University, Nanchang 330019, China
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表12种不同金属材料的力学参数
科
Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)
属
Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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