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| 玉米胚芽的预处理方式对正己烷体系中生育酚含量变化的影响 |
| Influence of corn germ pretreatment methods on tocopherol contents in n-hexane system |
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| DOI： |
| 中文关键词: 生育酚 玉米胚芽 高温干热处理 高压水蒸气湿热处理 |
| 英文关键词:tocopherol corn germ high-temperature dry-heat treatment wet-heat treatment with high pressure steam |
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| 中文摘要: |
| 向生育酚正己烷溶液中添加不同方式预处理（105℃高温烘烤2 h和110℃、0.05 MPa高压水蒸汽加热5 min）并调节至一定水分含量的玉米胚芽粉，进行室温避光储存实验，监测储存过程中生育酚含量的变化，系统研究玉米胚芽不同预处理方式对正己烷体系中生育酚含量的影响。结果表明：不进行预处理的玉米胚芽调节至不同的水分含量，水分含量越高，正己烷体系中α-生育酚和γ-生育酚含量降低的速度越快；105℃高温烘烤2 h和110℃、0.05 MPa高压水蒸气加热5 min都能有效控制正己烷体系中α-生育酚和γγ-生育酚含量的下降，使其保持基本恒定。因此，在对玉米胚芽制油前，需对其进行预处理，以防止其中的生育酚氧化。 |
| 英文摘要: |
| The corn germ was pretreated by baking for 2 h at 105℃ or heating for 5 min with 110℃，005 MPa high pressure steam, and then it was adjusted to different water contents. Room-temperature and away-from-light storage experiment was conducted by putting corn germ pretreated into tocopherol n-hexane solution, then the change of tocopherol content was measured during the storage to systemically study the influence of different pretreatment methods of corn germ on tocopherol contents. The results showed that the higher the water content of the corn germ without pretreatment was, the faster the contents of gamma and alpha tocopherol in tocopherol n-hexane solution decreased; baking for 2 h at 105℃ and heating for 5 min with 110℃，0.05 MPa high pressure steam could both effectively keep the contents of gamma and alpha tocopherol constants. Therefore, the corn germ should be pretreated to prevent the oxidation of tocopherol before processing corn germ oil. |
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