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Pectin
Pectin
Pectin is a party heterosakarida polymers derived from plant cell walls ashore. Was first isolated by Henri Braconnot 1825. The form of pectin extracted is white to light brown powder. Pectin is widely used in food industry as an adhesive, and stabilizer (to avoid precipitation).
Pectin in plant cells are building blocks of the middle lamella, the initial constituent layer cell wall. Certain cells, such as fruit, tend to collect more pectin. Pektinlah are usually responsible for the nature of "sticky" (Javanese: pliket) if someone peeling fruit. The main constituent is usually a polymer of D-galacturonic acid, which are bound by α-1,4-glycosidic. Galacturonic acid has a carboxyl group which can be linked to each other by Mg2 + or Ca2 + so that files polymer "attaches" to one another. This leads to a sense of "sticky" on the skin. Without the presence of these two ions, water-soluble pectin. Salts Mg- or Ca-pectin to form a gel, because the bond is structured amorphous (shapeless sure) that can expand when water molecules "trapped" between spaces.
The use of pectin is the most common as an adhesive / thickeners (gelling agent) on a peanut butter and jelly. Now extends its utilization as a filler material, component sweets, as well as a stabilizer for fruit juices and drinks of milk, as well as a source of fiber in the diet.
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