7Mitsuyoshi K, Tomomi T, Katsuhisa H, et al. Antioxidative ac- tivity of anthocyanins from purple sweet potato,ipomoea bata- tas cultivar ayamurasaki[J]. Biosci Biotechnol Biochem, 2005, 69(5) :979-988.
8Shi Z, Bassa I A, Gabriel S L, et al. Anthocyanin pigment of sweet potatoes-lpomoea batatas [J].Journal Food Science, 1992,57(3) :755-757.
9Suda I, Oki T, Masuda M, et al. Physiological of purple-fleshed sweet potatoes containing anthocyanins and their utilization in foods[J]. J apan Agricultural Research Quarterly, 2003,37 (3) : 167-173.
10Furuta S,Suda I, Nishiba Y, et al. High terbutylperoxyl radi cal scavenging activity of sweet potato cultivars with purple flesh[J]. Food Science Technology Int, 1998,4 ( 1 ): 33-35.