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The content of polysaccharides (A), total small–molecule saccharides (B), sucrose (C), 1-kestose (D), fructose (E), glucose (F), galactose (G), in the rhizomes of P. cyrtonema processed by different times of repeated steaming and the proposed model of saccharides change during repeated steaming (H); “fresh” means without steam process; roman numerals indicate the number of times of steaming.
