A decoction is a method of extraction of herbal or plant material, which includes, but is not limited to: Leaves, flowers, stems, roots, bark, and rhizomes. In chemistry, liquid-liquid extraction is a useful method to separate components (compounds) of a mixture. ... An herbal is a book, often illustrated, that describes the appearance, medical properties, and other characteristics of plants used in herbal medicine. ... Ginger rhizome A rhizome is, in botany, a usually underground, horizontal stem of a plant that often sends out roots and shoots from its nodes. ...

Some teas would be considered a decoction. Tea leaves in a Chinese gaiwan. ...

Process

Decoction involves first mashing, and then boiled in water to extract oils, volatile organic compounds (VOCs), and other chemical substances. Concentrate (in America) (aka Extract,Konsentrat) is a Soviet film made in 1958 by Russian director Andrei Tarkovsky. ... VOC is a three-letter abbreviation with multiple meanings, as described below: A historic trade organization (Verenigde Oostindische Compagnie); see Dutch East India Company A group of chemical compounds; see Volatile Organic Compounds Vehicle operating costs Voice of the customer Creative Voice file, a proprietary audio format developed by Creative...

References

• http://www.greenleafpolitics.com/medicine_making_decoction.html
• http://brewery.org/library/DecoctFAQ.html
• http://groups.msn.com/TeaCentral/brewingbydecoction.msnw