Refining the plant steroid hormone biosynthesis pathway

Sugarcane is traditionally refined into sugar in two stages. In the first stage, raw sugar is produced by the milling of freshly harvested sugarcane. In a sugar mill, sugarcane is washed, chopped, and shredded by revolving knives. The shredded cane is mixed with water and crushed. The juices (containing 10-15 percent sucrose ) are collected and mixed with lime to adjust pH to 7, prevent decay into glucose and fructose , and precipitate impurities. The lime and other suspended solids are settled out, and the clarified juice is concentrated in a multiple-effect evaporator to make a syrup with about 60 weight percent sucrose. The syrup is further concentrated under vacuum until it becomes supersaturated , and then seeded with crystalline sugar. Upon cooling, sugar crystallizes out of the syrup. Centrifuging then separates the sugar from the remaining liquid (molasses). Raw sugar has a yellow to brown color. Sometimes sugar is consumed locally at this stage, but usually undergoes further purification. [10] Sulfur dioxide is bubbled through the cane juice subsequent to crystallization in a process, known as "sulfitation". This process inhibits color forming reactions and stabilizes the sugar juices to produce “mill white” or “plantation white” sugar.

Refining the plant steroid hormone biosynthesis pathway

refining the plant steroid hormone biosynthesis pathway

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