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decoction
Decoction is a method of extraction by boiling of dissolved chemicals from herbal or plant material, which may include stems, roots, bark and rhizomes. Decoction involves first mashing and then boiling in water to extract oils, volatile organic compounds and other chemical substances.〔(Biology-online.org )〕 Decoction can be used to make herbal teas, teas, coffees, tinctures and similar solutions. Decoctions and infusions may produce liquids with differing chemical properties as the temperature/preparation difference may result in more oil-soluble chemicals in decoctions versus infusions. The process can also be applied to meats and vegetables to prepare bouillon or stock.
A decoction is also the name for the resulting liquid. Although this method of extraction differs from infusion and percolation, the resultant liquids are often functionally similar.
==Etymology==
The term dates back to 1350–1400〔(Dictionary.reference.com )〕 from present participle stem of Latin ''decoquere'' (meaning to boil down), de "from" + coquere "to cook".〔(Etymonline.com )〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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