Journal
FOOD CHEMISTRY
Volume 270, Issue -, Pages 149-155Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2018.07.078
Keywords
Ginger pulp; Ginger peel; 6-Gingerol; 6-Shogaol; Subcritical water extraction; Conversion
Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education, South Korea [2016R1D1A1B03930300]
- Korea Institute of Planning and Evaluation for Technology in Food, Agriculture, Forestry and Fisheries (IPET) through High Value-added Food Technology Development Program
- Ministry of Agriculture, Food and Rural Affairs (MAFRA), South Korea [315063-3]
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Subcritical water extraction is an eco-friendly method for the extraction of less polar compounds without the use of organic solvents. This study determined the extraction conditions that maximize the contents of 6-gingerol and 6-shogaol obtained from ginger pulp and peel. The highest yields of 6-gingerol (0.68 +/- 0.08 mg/g), and 6-shogaol (0.39 +/- 0.03 mg/g) were obtained from ginger pulp at the extraction conditions of 130 degrees C/25 min, and 190 degrees C/15 min. 6-Shogaol content increased with the increasing extraction temperature and extraction time due to the conversion of 6-gingerol to 6-shogaol by thermal cracking. The antioxidant activity of ginger extracts were increased depending on the increasing of 6-shogaol content.
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