J Integr Plant Biol. ›› 1981, Vol. 23 ›› Issue (2): -.

• Research Articles •    

Studies on the Chemical Properties of Crotalaria juncea Linn. Seed Gum

Zhao Xiu-ying, Li Sui-ying, Wu Zhi-xin, Zhao Yi-wen, Deng Zhao-fan and Qu Hong   

Abstract: Crotalaria juncea Linn. is an annual berbaceous plant of Crotalaria Linn. of the Leguminosae. It is widely used as green manure in our country, because its seed contaius 26.90% endosperm, of which more than 70% belong to galactomannan. Therfore it is also a kind of plant contained gum. The ratio between galactose and mannose is 1:2.3 in the galactomanuans. The seed gum of the Crotalaria juncea Li. in water will increase its solubility and viscosity as the temperature increases, but when the temperature is increasing over 70℃, it will cause the viscosity to decrease greatly. In the condition of alkaline medium, Crotalaria juncea Linn. seed gum solution with high viscosity can easily connect with borax to form gel. It is also used in the petroleum industry for having this good property. Crotalaria juncea Linn. seed gum may be a newsources for the hydraulic fracturing fluids of hydrogel.

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