Abstract
The feasibility of incorporating Cynanchi wilfordii powder as a value-added food ingredient in convenient food products was investigated using yanggaeng as a model system. C. wilfordii powder was incorporated into yanggaeng at 0, 2, 4, 6, and 8% weight amounts based on total weight of cooked white bean and C. wilfordii powder. pH increased significantly, and moisture content ranged from 45.40% to 47.40% with increasing levels of C. wilfordii powder (P<0.05). In terms of color, lightness, redness, and yellowness increased significantly (P<0.05) with increasing levels of C. wilfordii powder. Hardness significantly decreased with higher amounts of C. wilfordii powder (P<0.05). Total polyphenol content and DPPH radical scavenging activity were significantly influenced by addition of C. wilfordii powder, and they increased significantly as C. wilfordii powder concentration increased (P<0.05). Finally, consumer acceptance test indicated that the highest levels of C. wilfordii powder (8%, w/w) had considerable adverse effects on consumer preferences in general. In contrast, yanggaengs with moderate levels of C. wilfordii powder (2%, w/w) are recommended (with respect to overall preference score) to take advantage of the functional properties of C. wilfordii powder without sacrificing consumer acceptability.
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