Gellan Gum is the Kelco company in the 1980 s the development of a microbial edible glue. Following the xanthan gum kelco company after the development of a new type and microbe exocellular polysaccharide, its gel xanthan gum is more superior than performance. It is by the false form brain coli Iraq algae (Pseudomonaseloden) of music in neutral condition, with glucose for carbon sources, ammonium nitrate as nitrogen source and some inorganic salt made out of the medium, the aerobic fermentation and produce extracellular polysaccharide colloid, is a new type of completely transparent gel agent. Gellan gum is made up of four sugar molecules in order as D-glucose, D-glucose hyaluronic acid, D-glucose, L-rat lee sugar through the glycosidic bond of polymer connected to the saccharide compounds, one of the first glucose molecules is beta 1, 4 glycosidic bond connection.
Gellan gum powder is rice, no special taste and smell, at about the 150 ℃ without melting and decomposition. Heat resistant, acid performance is good, the stability carrageenan powder e number of enzyme is also high. Insoluble in the polar organic solvent, also not soluble in cold water, but a little mixing is scattered in the water, heating that dissolve into transparent solution, cooling, form transparent and solid gel. Soluble in hot deionized water or integration of existing low ionic strength agent solution, shows neutral aqueous solution.
Although gellan gum production obtained many achievements, but there still exist some problems, such as low production; Used for ventilation of high energy mix; Purification of organic solvent consumption with big; Organic solvent recycle more difficult, etc. So if can use genetic engineering means will produce plastic gene transfer to don’t think gas microorganisms normal expression, food additives and in the absence of oxygen, or the oxygen conditions production is reduced costs. In summary, the genetic engineering means screening high quality polysaccharide produce bacteria, and use of modern biological technology building has a variety of excellent performances gene engineering bacterium and cell engineering bacterium to improve gellan gum yield and quality, will be the future gellan gum production and research development direction.
Gellan gum powder is rice, no special taste and smell, at about the 150 ℃ without melting and decomposition. Heat resistant, acid performance is good, the stability carrageenan powder e number of enzyme is also high. Insoluble in the polar organic solvent, also not soluble in cold water, but a little mixing is scattered in the water, heating that dissolve into transparent solution, cooling, form transparent and solid gel. Soluble in hot deionized water or integration of existing low ionic strength agent solution, shows neutral aqueous solution.
Although gellan gum production obtained many achievements, but there still exist some problems, such as low production; Used for ventilation of high energy mix; Purification of organic solvent consumption with big; Organic solvent recycle more difficult, etc. So if can use genetic engineering means will produce plastic gene transfer to don’t think gas microorganisms normal expression, food additives and in the absence of oxygen, or the oxygen conditions production is reduced costs. In summary, the genetic engineering means screening high quality polysaccharide produce bacteria, and use of modern biological technology building has a variety of excellent performances gene engineering bacterium and cell engineering bacterium to improve gellan gum yield and quality, will be the future gellan gum production and research development direction.
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