Whole mulberry leaves as a promising functional food: From the alteration of phenolic compounds during spray drying and in vitro digestion
Whole mulberry leaves as a promising functional food: From the alteration of phenolic compounds during spray drying and in vitro digestion
复制标题
全桑叶作为一种有前途的功能食品：来自喷雾干燥和体外消化过程中酚类化合物的变化
DOI：
10.1111/1750-3841.16015
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发表时间：
2022-01-24
影响因子：
3.9
通讯作者：
Deng, Ze-yuan
中科院分区：
文献类型：
--
作者：
Hu, Qi-rui;Lai, Peng-wei;Deng, Ze-yuan
本研究探讨了用不同的干燥助剂对桑叶进行喷雾干燥，将桑叶加工成富含酚类化合物的营养保健品的潜力。结果表明，高WPI/桑叶固体比的喷雾干燥产品6（乳清分离蛋白24.2%、桑叶固体33.3%、麦芽糊精38.7%、大豆卵磷脂3.8%）具有最佳的物理性能、最高的总酚类化合物含量和抗氧化能力。具体而言，与新鲜桑叶相比，产品6中游离绿原酸和芦丁增加了2 - 3倍，但游离异槲皮苷和黄芪苷减少了50%以上。在体外消化方面，产品6的芦丁、异槲皮苷和黄芪苷（桑叶中抗氧化酚类化合物）的生物可及性高于绿原酸（p < 0.05）。同时，产品6的酚类化合物生物可及性比鲜桑叶高10 ~ 20倍。考虑到酚类化合物含量和生物可及性的提高，在WPI的保护下，桑叶可以作为潜在的功能食品进行喷雾干燥。喷雾干燥的桑叶可作为饮料、代餐粉或食品加工中的添加剂使用。
This study investigated the potential of processing whole mulberry leaves as nutraceutical foods rich in phenolic compounds by spray drying with different drying aids. The results indicated that the spray-dried product 6 (24.2% whey protein isolate [WPI], 33.3% mulberry leaves solid, 38.7% maltodextrin, 3.8% soybean lecithin) with high WPI/mulberry leaves solid ratio possessed the best physical properties, the highest total phenolic compounds level and antioxidant capacity among all the products. Specifically, free chlorogenic acid and rutin were increased by two to three times, but free isoquercitrin and astragalin lost more than 50% in product 6 compared with fresh mulberry leaves. For in vitro digestion, rutin, isoquercitrin, and astragalin (the antioxidative phenolic compounds in mulberry leaves) showed higher bioaccessibility than chlorogenic acid (p < 0.05) in product 6. Meanwhile, the phenolic compounds bioaccessibility of product 6 was 10-20 times higher than that of fresh whole mulberry leaves. Considering the increased level and bioaccessibility of phenolic compounds, whole mulberry leaves could be developed as potential functional foods by spray drying under the protection of WPI. Practical Application The spray-dried whole mulberry leaves can be consumed as a beverage, meal replacement powder, or used as additive during food processing.