CN111838593A - 一种苦笋粉制备方法 - Google Patents
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Abstract
本发明属于竹笋加工领域,公开了一种苦笋粉制备方法,该方法包含:对预处理苦笋加入水和第一组合物进行漂洗并水煮;将水煮后的苦笋打浆,加入复合酶进行酶解,得到第一样品;将第一样品进行真空冷冻干燥,得到第二样品;将第二样品进行气流粉碎。本发明制备的苦笋粉在去除苦味的同时,能有效减少苦笋中营养物质的损失,含有较高的总膳食纤维。
Description
技术领域
本发明涉及笋制品加工领域,具体涉及一种苦笋粉制备方法。
背景技术
苦笋为禾本科植物苦竹的嫩苗,具有清热除烦、利水除湿的功效,主治热病烦渴、小便不利、湿热黄疸、脚气等病症,其药用历史悠久,明代《本草纲目》就有记载:“苦笋味苦甘寒,主治不睡、去面目及舌上热黄,消渴明目,解酒毒、除热气、益气力、利尿、下气化痰,理风热脚气,治出汗后伤风失音”。苦笋不仅含有丰富的氨基酸和矿物质,是一种高蛋白、低脂型可食蔬菜,还富含多种功能性成分和生物活性物质,如黄酮、多糖、膳食纤维、酚酸类、生物碱类、苯环衍生物及微量元素等成分,具有降血压、血糖、抗炎抗菌、抗氧化等多种生理功能,其中的氰苷化合物还是强有效的酪氨酸酶抑制剂。此外,苦笋的功能性成分对治疗癌症和心血管疾病,减轻体重和改善消化均有良好效果,具有较强的保健作用。
苦笋作为食品,为了使其口感更佳,常在加工过程中通过漂洗工艺将苦笋中苦味物质去除,但传统的漂洗工艺虽能去除苦笋中的部分苦味成分,但也会造成苦笋中膳食纤维等营养物质的损失。
发明内容
为解决上述问题,本发明目的在于提供一种苦笋粉制备方法,在去除苦味的同时,能有效减少苦笋中营养物质的损失。
为达到上述目的,本发明采用的技术方案为:
一种苦笋粉制备方法,该方法包含:
对预处理苦笋加入水和第一组合物进行漂洗并水煮;
将水煮后的苦笋打浆,加入复合酶进行酶解,得到第一样品;
将第一样品进行真空冷冻干燥,得到第二样品;
将第二样品进行气流粉碎。
进一步的,所述预处理苦笋的制备方法包含:
取新鲜苦笋清洗去皮,切为3*3*3mm大小的苦笋块。
进一步的,所述第一组合物为柠檬酸与D-异抗坏血酸钠按重量比3:1混合,且第一组合物占预处理苦笋和水总重量的0.1%-0.3%。
进一步的,所述复合酶为木瓜蛋白酶与纤维素酶按重量比1:2混合,且复合酶的添加量占苦笋浆重量的0.1%。
进一步的,所述酶解的时间为50-70min,温度为55-65℃,pH为5-6。
与现有技术相比,本发明的有益效果为:
1.本发明经过漂洗和酶解工艺加工后所获得的苦笋粉,去苦效果明显,产品完全没有苦感,对改善产品风味特性起到了关键性作用,在去除苦味的同时,能有效减少苦笋中营养物质的损失。
2.本发明中通过科学的漂洗设计实验,确定出具有最佳漂洗效果的饮用水、柠檬酸和D-异抗坏血酸钠添加比例和漂洗时间,从而制备出了一种营养成分保留完整,且保质期长、色泽好的苦笋粉产品。
3.本发明采用合理的木瓜蛋白酶复合纤维素酶设计,确定最优复合酶配比和酶解时间、温度、PH和以及加量等酶解条件,由此获得一种总膳食纤维含量高的营养、功能性苦笋粉产品。
4.本发明制作一种苦笋粉产品,改变了苦笋受季节影响的食用缺点,增加了苦笋的食用范围,提高苦笋利用率,增加苦笋产业经济效益。
具体实施方式
下面通过实施例对本发明进行具体的描述,有必要在此指出的是以下实施例只用于对本发明进行进一步说明,不能理解为对本发明保护范围的限制。该领域的技术熟练人员可以根据上述本发明的内容,对本发明做出一些非本质的改进和调整。
实施例1
一种苦笋粉制备方法,该方法包含:
取新鲜苦笋清洗去皮,切为3*3*3mm大小的苦笋块,得预处理苦笋;
对预处理苦笋加入水和第一组合物进行漂洗并水煮;
将水煮后的苦笋打浆,加入复合酶进行酶解,复合酶为木瓜蛋白酶与纤维膜按重量比1:2混合,且复合酶的添加量占苦笋浆重量的0.1%,酶解的时间为50-70min,温度为55-65℃,pH为5-6,得到第一样品;
将第一样品进行真空冷冻干燥,得到第二样品;
将第二样品进行气流粉碎;
其中,第一组合物为柠檬酸与D-异抗坏血酸钠按重量比3:1混合,且第一组合物占预处理苦笋和水总重量的0.1%-0.3%。
实施例2
一种苦笋粉制备方法,该方法包含:
新鲜苦笋经挑选、清洗、去皮后进行切分,将其切割为3*3*3mm大小的苦笋块,得预处理苦笋;
分别称取饮用水3kg、预处理苦笋1kg进行混合,再向其中加入柠檬酸4g,D-异抗坏血酸钠1g,水煮2h;
将漂洗后的苦笋沥除多余水份后打浆,用木瓜蛋白酶复合纤维素酶(木瓜蛋白酶:纤维素酶=1:2)进行酶解,酶液添加量为0.1%、酶解时间为45 min、温度为55 ℃、PH为 5.5,得到第一样品;
将第一样品进行真空冷冻干燥处理,即先将真空冷冻干燥机运行预冷,再将酶解后的苦笋浆放于洁净托盘内,放入冷肼对样品进行预冻,待样品达到共晶点以下1 h,将样品移出,旋紧放气阀,待真空度下降到20 Pa以下,对其进行真空冷冻干燥,得到第二样品;
将第二样品倒入气流粉碎机内进行气流粉碎;
将气流粉碎后的苦笋粉进行收集、称量、包装,即得苦笋粉成品。
实施例3
新鲜苦笋经挑选、清洗、去皮后进行切分,将其切割为3*3*3mm大小的苦笋块,得预处理苦笋;
分别称取饮用水3kg、预处理苦笋1kg份进行混合,再向其中加入柠檬酸6g,D-异抗坏血酸钠2g,水煮2h;
将漂洗后的苦笋沥除多余水份后打浆,用木瓜蛋白酶复合纤维素酶(木瓜蛋白酶:纤维素酶=1:2)进行酶解,酶液添加量为0.1%、酶解时间为60 min、温度为60 ℃、PH为 5.5,得第一样品;
将第一样品进行真空冷冻干燥处理,即先将真空冷冻干燥机运行预冷,再将酶解后的苦笋浆放于洁净托盘内,放入冷肼对样品进行预冻,待样品达到共晶点以下1 h,将样品移出,旋紧放气阀,待真空度下降到20 Pa以下,对其进行真空冷冻干燥,得第二样品;
将第二样品倒入气流粉碎机内进行气流粉碎;
将气流粉碎后的苦笋粉进行收集、称量、包装,即得苦笋粉成品。
实施例4
新鲜苦笋经挑选、清洗、去皮后进行切分,将其切割为3*3*3mm大小的苦笋块,得预处理苦笋;
分别称取饮用水3kg、预处理苦笋1kg份进行混合,再向其中加入柠檬酸8g,D-异抗坏血酸钠3g,水煮2h;
将漂洗后的苦笋沥除多余水份后打浆,用木瓜蛋白酶复合纤维素酶(木瓜蛋白酶:纤维素酶=1:2)进行酶解,酶液添加量为0.1%、酶解时间为75min、温度为65 ℃、PH为 5.5,得第一样品;
将第一样品进行真空冷冻干燥处理,即先将真空冷冻干燥机运行预冷,再将酶解后的苦笋浆放于洁净托盘内,放入冷肼对样品进行预冻,待样品达到共晶点以下1 h,将样品移出,旋紧放气阀,待真空度下降到20 Pa以下,对其进行真空冷冻干燥,得第二样品;
将第二样品倒入气流粉碎机内进行气流粉碎;
将气流粉碎后的苦笋粉进行收集、称量、包装,即得苦笋粉成品。
对比例1
与实施例2相比,未添加复合酶酶解,即木瓜蛋白酶与纤维素酶,其余原料和方法均与实施例2相同。
对比例2
与实施例2相比,未添加第一组合物,即柠檬酸和D-异抗坏血酸钠,其余原料和方法均与实施例2相同。
对比例3
与实施例2相比,未添加一组合物和复合酶,即柠檬酸、D-异抗坏血酸钠、木瓜蛋白酶和纤维素酶,其余原料和方法均与实施例2相同。
指标检测:
一、感官评价
选用20人(10男10女)成立感官评定小组进行感官评价。
评价方法:首先样品外观色泽,是否有絮凝、沉淀等,闻其气味品尝评定其滋味,根据色泽、泡沫、香气、口味及澄清度等评分项目进行打分。评定项目和评价标准见表1,感官评价结果见表2。
表1 苦笋粉感官评价表
表2 实施例与对比例感官评价结果
由实施例2-4与对比例1-3可知,通过本发明采用工艺制备苦笋粉产品感官评价分数更高。通过实施例2与对比例1对比可知,不进行酶解会显著影响产品的气味和滋味。通过实施例2与对比例2对比可知,不添加柠檬酸和D-异抗坏血酸钠显著影响苦笋粉的色泽。通过实施例2与对比例3对比可知,仅通过传统漂洗工艺,没有进行护色和酶解处理对产品质量影响巨大,直接影响苦笋粉的色泽和气味。
二、膳食纤维测定
参考GB 5009.88-2014 《食品安全国家标准 食品中膳食纤维的测定》方法分别对实施例2-4与对比例1-3制备的苦笋粉产品进行测定,测定结果如表3所示:
表3
由实施例2-4与对比例1-3可知,通过本发明采用工艺制备苦笋粉产品感官评价分数更高;通过实施例2与对比例1对比可知,不进行酶解会大量降低产品中膳食纤维含量;通过实施例2与对比例2对比可知,不添加柠檬酸和D-异抗坏血酸钠仍会降低产品的膳食纤维含量,但膳食纤维含量高于不进行酶解的情况;膳食纤维含量最低的是对比例3,即既未进行酶解,又未添加柠檬酸和D-异抗坏血酸钠。因此,只有在同时进行复合酶解且添加柠檬酸和D-异抗坏血酸钠的情况下得到的苦笋粉膳食纤维含量显著提高。
最后应说明的是:以上各实施例仅用以说明本发明的技术方案,而非对其限制;尽管参照前述各实施例对本发明进行了详细的说明,但本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分或者全部技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。
Claims (5)
1.一种苦笋粉制备方法,其特征在于,该方法包含:
对预处理苦笋加入水和第一组合物进行漂洗并水煮;
将水煮后的苦笋打浆,加入复合酶进行酶解,得到第一样品;
将第一样品进行真空冷冻干燥,得到第二样品;
将第二样品进行气流粉碎。
2.如权利要求1所述的方法,其特征在于,所述预处理苦笋的制备方法包含:
取新鲜苦笋清洗去皮,切为3*3*3mm大小的苦笋块。
3.如权利要求1所述的方法,其特征在于,所述第一组合物为柠檬酸与D-异抗坏血酸钠按重量比3:1混合,且第一组合物占预处理苦笋和水总重量的0.1%-0.3%。
4.如权利要求1所述的方法,其特征在于,所述复合酶为木瓜蛋白酶与纤维膜按重量比1:2混合,且复合酶的添加量占苦笋浆重量的0.1%。
5.如权利要求1或4所述的方法,其特征在于,所述酶解的时间为50-70min,温度为55-65℃,pH为5-6。
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