Sun Xianbao, Zhang Yuwei, Li Jing, Aslam Nayab, Sun Hanju, Zhao Jinlong, Wu Zeyu, He Shudong
Engineering Research Center of Bio-process, Ministry of Education, Hefei University of Technology, Hefei, China.
School of Food and Biological Engineering, Hefei University of Technology, Hefei, China.
PeerJ. 2019 Feb 4;7:e6369. doi: 10.7717/peerj.6369. eCollection 2019.
Black kidney bean ( L.) powder (BKBP) with particle sizes of 250-180, 180-125, 125-75, 75-38, and <38 μm was prepared by using coarse and eccentric vibratory milling, respectively. Physicochemical properties, cholesterol adsorption, and antioxidant activities of powders were investigated. Size and scanning electron microscopy analyses showed that particle size of BKBP could be effectively decreased after the superfine grinding treatment, and the specific surface area was increased. Flow properties, hydration properties, thermal stability, and cholesterol adsorption efficiency significantly improved with the reducing of particle size. The superfine powder with sizes of 75-38 or <38 μm exhibited higher antioxidant activity via 2,2-diphenyl-1-picryhydrazyl, hydroxyl radical-scavenging, and ferrous ion-chelating assays. The results indicated that the BKBP with a size of <38 μm could serve as a better potential biological resource for food additives, and could be applied for the development of low-cholesterol products.
分别采用粗振动磨和偏心振动磨制备了粒径为250 - 180、180 - 125、125 - 75、75 - 38和<38μm的黑芸豆（L.）粉（BKBP）。研究了这些粉末的物理化学性质、胆固醇吸附性能和抗氧化活性。粒度分析和扫描电子显微镜分析表明，经过超微粉碎处理后，BKBP的粒径可有效减小，比表面积增大。随着粒径减小，流动性、水化性质、热稳定性和胆固醇吸附效率显著提高。通过2,2 - 二苯基 - 1 - 苦基肼自由基清除法、羟基自由基清除法和亚铁离子螯合试验表明，粒径为75 - 38或<38μm的超微粉具有较高的抗氧化活性。结果表明，粒径<38μm的BKBP有望成为一种更好的食品添加剂生物资源，并可用于开发低胆固醇产品。
