Chemical Constituents of the Seed Cake of Jatropha curcas
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Jatropha curcas, a tropical and subtropical shrub/tree, has been emerging as the most promising biodiesel crop because of its high oil content and ability to grow in wasteland and marginal land [1, 2]. The kernel cake is the major by-product of the Jatropha biodiesel industry. Studying the cake components, especially the toxic ingredients, could contribute to research on its use . However, research on the composition of the cake is not sufficient up to now, and only a few of papers have been published [3, 4, 5].
The hot pressed cake (2 t, bought from Yunnan Shen-Yu Company, Chuxiong, Yunnan Province, China) was exhaustively extracted with CH3OH (50°C, 3 times). Water (100 L) was added to the CH3OH extract (200 L), and it was extracted again using ethyl acetate (3 times) to get 16 kg crude extract, which was subjected to column chromatography on silica gel eluting with CHCl3–MeOH gradient (1:0–0:1) to afford six fractions (Frs. 1–6). Repeated chromatography of Fr. 2 on silica gel...
This investigation was supported by a Grant (No. 21366033) from the Natural Science Foundation of China.
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