Welan gum explained

Welan gum is an exopolysaccharide used as a rheology modifier in industrial applications such as cement manufacturing.^[1] It is produced by fermentation of sugar by bacteria of the genus Alcaligenes. The molecule consists of repeating tetrasaccharide units with single branches of L-mannose or L-rhamnose.^[2] In solution, the gum retains viscosity at elevated temperature, and is stable in a wide pH range, in the presence of calcium ion, and with high concentration of glycols.^{[3] [4] [5]}

See also

• Gellan gum
• Xanthan gum

External links

• Industrial polysaccharides . Pure and Applied Chemistry . 61 . 7 . 1315–1322 . 1989 . Dea, Ian C M . 10.1351/pac198961071315. 195819313 .

Notes and References

1. US. 5004506. patent. Welan gum in cement compositions . 2 April 1991 . Allen, Floyd L. . Best, Glen H. . Lindroth, Thomas A. . Merck & Co., Inc..
2. Kaur. Varinder. Bera. Manav B.. Panesar. Parmjit S.. Kumar. Harish. Kennedy. J.F.. Welan gum: Microbial production, characterization, and applications. International Journal of Biological Macromolecules. 65. 2014. 454–461. 0141-8130. 10.1016/j.ijbiomac.2014.01.061. 24508918.
3. Web site: CP Kelco Welan Gum. CP Kelco . 17 Sep 2010 .
4. Web site: Welan gum . Colltec . 17 Sep 2010.
5. Web site: Welan gum . Fritz Industries . 17 Sep 2010.