Guar bean, Cyamopsis tetragonolobus
The guar bean ( Cyamopsis tetragonolobus ), and guar called, is a useful plant from the family of legumes (Fabaceae or Leguminosae) subfamily Pea (Faboideae). It is closely related to a number of other crops called " beans " .
The guar bean reaches a height of up to two meters. The plant forms legumes about 10 cm long with oval seeds about 5 mm in size.
The most important product of the plant is the guar gum (also called guar , guar flour or guar gum ), which consists mainly of the multiple sugar guaran. The outer layers and the seedling are separated from the seed before it is ground. Guar gum is used as a thickener for a variety of foods (additive E 412). Similar food additives are gum arabic and carob gum from the seeds of the carob tree (see also vegetable gum ).
One technical application of guar gum is the production of thickeners for oil and gas extraction ( fracking ).
- Rakesh Pathak: Clusterbean: Physiology, Genetics, and Cultivation. Springer, Singapore 2015, ISBN 978-981-287-905-9 .
- Walter H. Schuster: Guarbohne (in: Legumes for grain use ) Justus Liebig University Giessen, 1998
- Isolated: plant genes for ice cream and Co ORF.at
- Udo Pollmer: Hunt for the miracle bean guar. There is a real thriller behind the designation E 412 Deutschlandradio Kultur, 23 September 2012
- Tamil Bean Bubble: How the US fracking boom is ruining Indian farmers. ZEIT ONLINE, January 2, 2013