Effects of Zizyphus jujuba var. boeunesis Extracts on the Growth of Intestinal Microflora and Its Antioxidant Activities
2011
Jeong, H.M., Chungbuk National University, Cheongju, Republic of Korea | Kim, Y.S., Chungbuk National University, Cheongju, Republic of Korea | Ahn, S.J., Chungbuk National University, Cheongju, Republic of Korea | Auh, M.S., Chungbuk National University, Cheongju, Republic of Korea | Ahn, J.B., Seowon University, Cheongju, Republic of Korea | Kim, K.Y., Chungbuk National University, Cheongju, Republic of Korea
This study was carried out to investigate the effects of jujube extracts on intestinal microflora, along with their antioxidant activities, according to extraction method. The antimicrobial activities of the extracts were measured using the agar diffusion method with a jujube extract concentration of 50 mg/mL. Neither the first nor second jujube extracts were inhibitory against the tested intestinal bacteria. However, water extracts of jujube significantly enhanced the growth of lactic acid bacteria, especially Bifidobacterium bifidum and Bifidobacterium adolescentis. Total phenol compounds and flavonoid compounds were higher in the 1st than in the 2nd water extracts. The EDA values of both water and ethanol extracts increased in proportion to the extract concentration. The 1st water extract showed the highest value among all the others, which was 85.60% at the concentration of 0.05 mg/mL. Furthermore, the 1st water extract showed stronger antioxidant activity than the other samples with an activity of 679.91 mg AA eq/g. These results support the potential use of jujube water extracts as a functional food component and a valuable resource for the development of nutraceutical foods, to increase the growth of Bifidobacterium spp. in the human intestine.
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