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Open AccessArticle

Quantitative Analysis of Bioactive Phenanthrenes in Dioscorea batatas Decne Peel, a Discarded Biomass from Postharvest Processing

by Minyoul Kim 1,2,†, Myeong Ju Gu 1,†, Joon-Goo Lee 3, Jungwook Chin 4, Jong-Sup Bae 5,* and Dongyup Hahn 1,2,6,*
1
School of Food Science and Biotechnology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Korea
2
Department of Integrative Biology, Kyungpook National University, Daegu 41566, Korea
3
Food Standard Division, Ministry of Food and Drug Safety, Cheongju 28159, Korea
4
New Drug Development Center, Daegu-Gyeongbuk Medical Innovation Foundation, Daegu 41061, Korea
5
College of Pharmacy, CMRI, Research Institute of Pharmaceutical Sciences, BK21 Plus KNU Multi-Omics based Creative Drug Research Team, Kyungpook National University, Daegu 41566, Korea
6
Institute of Agricultural Science and Technology, College of Agriculture and Life Sciences, Kyungpook National University, Daegu 41566, Korea
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Antioxidants 2019, 8(11), 541; https://doi.org/10.3390/antiox8110541 (registering DOI)
Received: 10 October 2019 / Revised: 4 November 2019 / Accepted: 8 November 2019 / Published: 10 November 2019
(This article belongs to the Special Issue Polyphenolic Antioxidants from Agri-Food Waste Biomass)
Dioscorea batatas Decne (Chinese yam) has been widely cultivated in East Asia for the purposes of food and medicinal uses for centuries. Along with its high nutritional value, the medicinal value of D. batatas has been extensively investigated in association with phytochemicals such as allantoin, flavonoids, saponins and phenanthrenes. Phenanthrenes are especially considered the standard marker chemicals of the Chinese yam for their potent bioactivity and availability of analysis with conventional high performance liquid chromatography with ultraviolet detection (HPLC-UV) methods. In order to investigate how much the contents of phenanthrenes are in the actual food products provided for consumers, D. batatas tuber was peeled and separated into its peel and flesh as in the conventional processing method. A quantitative analysis using the HPLC-UV method revealed that phenanthrenes are concentrically present in the D. batatas peel, while phenanthrenes are present in the flesh under the limit of detection. The difference in the contents of phenanthrenes is estimated to have arisen the considerable difference of antioxidant potential between the peel and the flesh. The results from this study suggest the high value of the discarded biomass of the Chinese yam peel and the necessity for the utilization of the Chinese yam peel. View Full-Text
Keywords: Dioscorea batatas; Chinese yam; phenanthrenes; quantitative analysis Dioscorea batatas; Chinese yam; phenanthrenes; quantitative analysis
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Kim, M.; Gu, M.J.; Lee, J.-G.; Chin, J.; Bae, J.-S.; Hahn, D. Quantitative Analysis of Bioactive Phenanthrenes in Dioscorea batatas Decne Peel, a Discarded Biomass from Postharvest Processing. Antioxidants 2019, 8, 541.

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