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== Introduction == Gum Acacia is the name originally pertaining to Sudan, Kordofan or Egyptian Gum. During the political disturbances in Egypt between 1880 and 1890, this gum became nearly 'extinct'. Hence its substitutes were used. Among the many substitutes then offered, the best was Gum Senegal, which was adopted as the official equivalent of Gum Acacia. The term 'Gum Senegal' is not, strictly speaking, synonymous with Gum Acacia, though it is commonly so used. Because of its frequent use, it came about that the name was regarded as synonymous. Acacia gum is the dried gummy exudate that collects on the surfaces of the branches and the stems of the Acacia trees. At the end of the rainy season, the stems begin to exude the gum. In about fifteen days it thickens in the furrow down which it runs. It then hardens on exposure to the air, usually in the form of round or oval tears, about the size of a pigeon's egg, but sometimes in vermicular forms, white or red, according to whether the species is a white or red gum tree. It is then harvested and marketed as 'Gum Arabic'. There are many kinds of Acacia Gum in commerce. All the gum-yielding Acacias exhibit the same general appearance, differing only in technical characters. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Pharmacognosy of Acacia」の詳細全文を読む スポンサード リンク
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