LAUSR

BACKGROUND Rosa rugosa cv. Plena (RP) is a member of edible flowers, which is one of the most significant commercial crops around the world. Due to its high medicinal and nutritional values, RP has received increasing attention in food industry recently. In the current research, the physicochemical properties, antioxidant capacity and hygroscopicity of four RP powders produced by ball milling were compared. RESULTS The brightness, redness, blueness of RP powders improved after superfine grinding. Water and oil holding capacity decreased with the decrease of particle size, but the water solubility index increased from 7.10% to 29.93%. The elements were not significantly (p>0.05) affected by particle size, while the phytochemicals after superfine grinding was released and extracted more easily, resulting in higher contents of anthocyanins, polyphenols, and flavonoids (3.06, 34.01, and 3.97 mg/g, respectively), and stronger antioxidant capacities (ABTS, and DPPH: 24.51 and 39.81 mM TE/g, respectively) than other powders. Besides, superfine grinding improved the water absorption capacity of RP powders under high RH environment. CONCLUSION Conclusively, superfine grinding is a promising technique for the production of RP powders with higher bioactive substances and bioactivity. This article is protected by copyright. All rights reserved.