pharmacognosy$59918$ - traduzione in
![Gum arabic exuding from ''[[Acacia nilotica]]''](https://commons.wikimedia.org/wiki/Special:FilePath/Gum Arabic exuding.jpg?width=200 "Gum arabic exuding from ''[[Acacia nilotica]]''")
![A 2019 [[American Silver Eagle]] [[bullion coin]] with a fineness of 999 ('three nines fine'), together with a [[Walking Liberty half dollar]] with a fineness of 900 ('one nine fine').](https://commons.wikimedia.org/wiki/Special:FilePath/2019 American Silver Eagle and 1943 Walking Liberty Half dollar side by side.jpg?width=200 "A 2019 [[American Silver Eagle]] [[bullion coin]] with a fineness of 999 ('three nines fine'), together with a [[Walking Liberty half dollar]] with a fineness of 900 ('one nine fine').")
![Example of a container used for collecting 24-hour urine samples. This particular container is free of [[trace metal]]s to allow for accurate measurement of these substances in urine.](https://commons.wikimedia.org/wiki/Special:FilePath/Trace metal-free 24 hour urine container.jpg?width=200 "Example of a container used for collecting 24-hour urine samples. This particular container is free of [[trace metal]]s to allow for accurate measurement of these substances in urine.")
![agar]], which changes colour based on the bacterial species present](https://commons.wikimedia.org/wiki/Special:FilePath/Urine cultured on Oxoid Brilliance UTI Agar plate.jpg?width=200 "agar]], which changes colour based on the bacterial species present")
Definizione
Wikipedia
Gum arabic (gum acacia, gum sudani, Senegal gum and by other names) is a natural gum originally consisting of the hardened sap of two species of the Acacia tree, Senegalia senegal and Vachellia seyal. The term "gum arabic" does not legally indicate a particular botanical source, however. The gum is harvested commercially from wild trees, mostly in Sudan (80%) and throughout the Sahel, from Senegal to Somalia. The name "gum Arabic" (al-samgh al-'arabi) was used in the Middle East at least as early as the 9th century. Gum arabic first found its way to Europe via Arabic ports, so retained its name.
Gum arabic is a complex mixture of glycoproteins and polysaccharides, predominantly polymers of arabinose and galactose. It is soluble in water, edible, and used primarily in the food industry and soft-drink industry as a stabilizer, with E number E414 (I414 in the US). Gum arabic is a key ingredient in traditional lithography and is used in printing, paints, glues, cosmetics, and various industrial applications, including viscosity control in inks and in textile industries, though less expensive materials compete with it for many of these roles.
