Abstract Extrusion is an alternative pretreatment for oil extraction from cereal resource. The objective of this study was to assess the feasibility of extrusion pretreatment of oat bran for oil extraction. The effects of extrusion conditions including feed moisture content, screw speed and die temperature on the extraction, quality and antioxidant capacity of oat bran oil were investigated. The results showed that the extraction yield of oat bran oil varied from 3.93% to 8.43% under different extrusion conditions. A feed moisture content of 25% had an important effect on the extraction of oil from oat bran. Extrusion pretreatment could increase oil extraction efficiency by increasing expansion index and porosity of oat bran extrudates. Extrusion processing had no positive or adverse effect on the fatty acid compositions, and acid, peroxide and iodine values. Meanwhile, extrusion processing did not affect the phytochemical components and antioxidant capacity of oat bran oil. But refining process could result in decrease of phytochemical components and antioxidant capacity of oat bran oil. These results indicated that extrusion is a feasible and potential pretreatment procedure for oil extraction from oat bran.

中文翻译：

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挤压预处理对燕麦（Avena Sativa L.）麸皮油提取、品质和抗氧化能力的影响

摘要 挤压是从谷物资源中提取油脂的一种替代预处理方法。本研究的目的是评估燕麦麸挤压预处理用于榨油的可行性。研究了饲料水分含量、螺杆转速和模具温度等挤压条件对燕麦麸油的提取、质量和抗氧化能力的影响。结果表明，不同挤压条件下燕麦麸油的提取率在3.93%～8.43%之间。25% 的饲料水分含量对从燕麦麸中提取油有重要影响。挤压预处理可以通过增加燕麦麸挤出物的膨胀指数和孔隙率来提高榨油效率。挤压加工对脂肪酸组成没有正面或负面影响，酸、过氧化物和碘值。同时，挤压加工对燕麦麸油的植物化学成分和抗氧化能力没有影响。但精炼过程会导致燕麦麸油的植物化学成分和抗氧化能力降低。这些结果表明挤压是从燕麦麸皮中提取油的可行且有潜力的预处理程序。