CN107373375A - 一种抗氧化工程再造米的制备方法 - Google Patents
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Abstract
本发明公开了一种抗氧化工程再造米的制备方法，以糙米为原料，经超微粉碎磨成细粉在与大豆分离蛋白、大豆低聚肽、蓝莓提取物按比例混合，采用双螺杆挤压机进行高湿挤压组织化处理成型，再通过烘干除尘包装而成。本发明是一种具有抗氧化保健功能的工程米，不仅具有平衡膳食保证食用人群营养摄入的作用，而且大米多肽和添加的大豆低聚肽及蓝莓提取物则可以发挥了抗氧化的功能，防止工程米的脂质氧化，延长了其保质期，而且食用后可以降低体内自由基水平,帮助机体抵御疾病。
Description
技术领域
本发明涉及一种抗氧化工程再造米的制备方法，属于食品制造技术领域。
背景技术
糙米是除去稻谷外壳的米粒，由米糠层、胚芽和胚乳组成。糙米的质地较为紧密，口感比较粗糙，与精白米相比，其蒸煮性、口感和吸收性较差，食味品质较低，人们难以接受。同时，由于不饱和脂肪酸存在于糙米的糠皮中，因此糙米容易被氧化，不利于储藏，容易变质。但精白米由于去除了米糠层和胚芽，其营养价值要远远低于糙米。因此，改善糙米的口感、蒸煮、消化性和储藏稳定性是提高其利用价值的关键。
本发明采用超微粉碎技术联合螺杆挤压技术，首先将糙米超微粉碎，超微粉碎可以使糙米粉的粒度减小、比表面积增大，进而使糙米中非水溶性膳食纤维分子中的亲水基团暴露率增大，持水力、膨胀力和结合水力提高。另外，超微粉碎高强的作用力在破坏非水溶性膳食纤维微粒结构、切断其连接的同时，还有可能对其微粒的结晶状态产生影响。磨好的糙米粉再与大豆蛋白、大豆低聚肽和蓝莓提取物混合，加大米水解液调质，在控制一定转速和温度的条件下，将在挤压机内达到一定糊化度的糙米粉进行挤压成型造粒。生产出的糙米挤压工程米，不仅提高了糙米的口感及储藏稳定性，而且糙米中的营养物质还得到了有效保留，同时还赋予了大米抗氧化的功效。
氧化与人类及其他动物的许多疾病,诸如癌症、老化、动脉硬化等发病机理有关。适当摄入具有抗氧化活性的物质可以降低体内自由基水平,防止脂质过氧化,帮助机体抵御疾病。近年来,研究者发现食物蛋白质中也存在具有抗氧化活性的肽序列，当用合适的蛋白酶水解时，这些活性肽就被释放出来，它们具有抑制生物大分子过氧化和清除体内自由功能，而且它们的活性往往强于氨基酸和蛋白质，食物源抗氧化肽具有低毒、高效、易吸收等特点。因此，可以利用大米蛋白的抗氧化活性肽开发出具有抗氧化工程米。
发明内容
为解决现有技术的不足，本发明提供了一种具有抗氧化功能工程米及其制备方法，采用的技术方案如下：
本发明的目的在于提供一种具有抗氧化功能工程米及其制备方法，包括以下步骤：
一种抗氧化工程再造米的制备方法，其特征在于：该方法包括以下步骤：(1)清理干净的糙米经超微粉碎机粉碎至细度为100μm-200μm；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，离心分离，收集水解液；(3)将糙米粉、大豆分离蛋白、大豆低聚肽、蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
所述的超微粉碎系统由圆盘式气流粉碎机与旋风分离器、袋式捕集器及加料装置组成，主要技术参数：粉碎压力0.8MPa-1.1MPa；加料压力0.6MPa-1.2MPa；空气耗量1.2/min-1.63/min。
所述的酶解条件为：酶解温度50℃-60℃，酶解pH8-10，酶解时间60min-120min，加酶量0.5％-2％。
所述的预混合物料由包括以下重量份数的原料制备而成：糙米粉70％-85％，大豆分离蛋白5％-25％，大豆低聚肽1％-4.5％，蓝莓提取物0.5％-4％。
所述的双螺杆挤压机对混合物料进行高温高压组织化成型，生产过程控制参数包括：喂料速度200kg/h-300kg/h，挤压温度70℃-120℃，含水量20％-38％，旋切转速300r/min-550r/min。
具体实施方式
下面对本发明具体实施例进行详细描述。
为解决现有技术的不足，本发明提供了一种抗氧化工程再造米的制备方法，采用的技术方案如下：
本发明的目的在于提供一种抗氧化功能工程米的制备方法，包括以下步骤：
一种抗氧化工程再造米的制备方法，该方法包括以下步骤：(1)清理干净的糙米经超微粉碎机粉碎至细度为100μm-200μm；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，离心分离，收集水解液；(3)将糙米粉、大豆分离蛋白、大豆低聚肽、蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
所述的超微粉碎系统由圆盘式气流粉碎机与旋风分离器、袋式捕集器及加料装置组成，主要技术参数：粉碎压力0.8MPa-1.1MPa；加料压力0.6MPa-1.2MPa；空气耗量1.2/min-1.63/min。
所述的酶解条件为：酶解温度50℃-60℃，酶解pH8-10，酶解时间60min-120min，加酶量0.5％-2％。
所述的预混合物料由包括以下重量份数的原料制备而成：糙米粉70％-85％，大豆分离蛋白5％-25％，大豆低聚肽1％-4.5％，蓝莓提取物0.5％-4％。
所述的双螺杆挤压机对混合物料进行高温高压组织化成型，生产过程控制参数包括：喂料速度200kg/h-300kg/h，挤压温度70℃-120℃，含水量20％-38％，旋切转速300r/min-550r/min。
实施例1
所述的抗氧化工程米的制备方法为：(1)清理干净的糙米经超微粉碎机粉碎至细度为150μm，超微粉碎机主要技术参数为：粉碎压力1.0MPa；加料压力0.9MPa；空气耗量1.4/min；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，酶解条件为：酶解温度55℃，酶解pH9，酶解时间90min，加酶量1％，离心分离，收集水解液；(3)将80％糙米粉、15％大豆分离蛋白、3％大豆低聚肽、2％蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用，将水分含量调至30％；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型，主要技术参数为：喂料速度280kg/h，挤压温度80℃，含水量30％，旋切转速400r/min；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
实施例2
所述的抗氧化工程米的制备方法为：(1)清理干净的糙米经超微粉碎机粉碎至细度为100μm，超微粉碎机主要技术参数为：粉碎压力0.8MPa；加料压力0.6MPa；空气耗量1.2/min；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，酶解条件为：酶解温度50℃，酶解pH8，酶解时间60min，加酶量0.5％，离心分离，收集水解液；(3)将70％糙米粉、25％大豆分离蛋白、1％大豆低聚肽、4％蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用，将水分含量调至20％；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型，主要技术参数为：喂料速度200kg/h，挤压温度70℃，含水量20％，旋切转速300r/min；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
实施例3
所述的抗氧化工程米的制备方法为：(1)清理干净的糙米经超微粉碎机粉碎至细度为100μm，超微粉碎机主要技术参数为：粉碎压力1.1MPa；加料压力1.2MPa；空气耗量1.63/min；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，酶解条件为：酶解温度60℃，酶解pH10，酶解时间120min，加酶量2％，离心分离，收集水解液；(3)将85％糙米粉、10％大豆分离蛋白、4.5％大豆低聚肽、0.5％蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用，将水分含量调至38％；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型，主要技术参数为：喂料速度300kg/h，挤压温度120℃，含水量38％，旋切转速550r/min；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
Claims (5)
1.一种抗氧化工程再造米的制备方法，其特征在于：该方法包括以下步骤：(1)清理干净的糙米经超微粉碎机粉碎至细度为100μm-200μm；(2)将糙米粉与水混合得到混合液，向混合液中加入碱性蛋白酶进行酶解，离心分离，收集水解液；(3)将糙米粉、大豆分离蛋白、大豆低聚肽、蓝莓提取物混合均匀，用上一步骤得到的水解液调质备用；(4)采用双螺杆挤压造粒机对混合物料进行高湿挤压组织化成型；(5)通过冷风控水处理产品后，再通过进一步的烘干除尘包装等步骤获得最终产品。
2.根据权利1所述的一种抗氧化工程再造米的制备方法，其特征在于，所述的超微粉碎系统由圆盘式气流粉碎机与旋风分离器、袋式捕集器及加料装置组成，主要技术参数：粉碎压力0.8MPa-1.1MPa；加料压力0.6MPa-1.2MPa；空气耗量1.2/min-1.63/min。
3.根据权利1所述的一种抗氧化工程再造米的制备方法，其特征在于，所述的酶解条件为：酶解温度50℃-60℃，酶解pH8-10，酶解时间60min-120min，加酶量0.5％-2％。
4.根据权利1所述的一种具有抗氧化功能工程米的制备方法，其特征在于，所述的预混合物料由包括以下重量份数的原料制备而成：糙米粉70％-85％，大豆分离蛋白5％-25％，大豆低聚肽1％-4.5％，蓝莓提取物0.5％-4％。
5.根据权利1所述的一种抗氧化工程再造米的制备方法，其特征在于，所述的双螺杆挤压机对混合物料进行高温高压组织化成型，生产过程控制参数包括：喂料速度200kg/h-300kg/h，挤压温度70℃-120℃，含水量20％-38％，旋切转速300r/min-550r/min。
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