One end of the white double fruit nut is a little sharp and the other end is blunt. Because there are two pistils, it develops into a double fruit with sweet kernel and shell thickness of 0.2 1 cm. Length 1.5 to 2.5cm, width 1 to 2cm and thickness 1cm. The surface is yellowish white or light brown, smooth, with 2 to 3 ridges. The mesocarp (shell) is bony and hard. The inner seed coat is membranous, the kernel is wide ovoid or oval, one end is light brown, the other end is golden yellow, the outer layer of the cross section is yellow and gelatinous, and the inner layer is light yellow or light green, powdery, with a gap in the middle.

Slight gas, sweet and slightly bitter. The average kernel weight of double fruits is1.9g, and there are 590 nuts per kilogram. The average kernel weight is 0.76 g, and the kernel yield is 30%. The tree stands upright. Small and short fruit branches and short fruit branches bear fruit mainly. High yield, strong adaptability and resistance. Mature in late August.

Chemical Constituents in Duobai Shuangguo

The seeds of Duobai Shuangguo contain a small amount of cyanoside, gibberellin and dynamic essence. Two ribonucleases were also isolated from endosperm. The general composition is: protein 6.4, fat 2.4, carbohydrate 36%, calcium 10 mg, phosphorus 2 18 mg, iron 1 mg%, carotene 320 μ g, riboflavin 50 μ g%, and various amino acids. The testa contains toxic components, such as ginkgolic acid, hydrogenated ginkgolic acid, hydrogenated ginkgolic acid, ginkgol and ginkgol.

It also contains aspartic acid, formic acid, propionic acid, butyric acid, octanoic acid, octacosanol 10 and so on. Pollen contains a variety of amino acids, glutamine, asparagine, protein, citric acid, sucrose and so on. White pulp, white juice, ginkgol, especially ginkgolic acid have outstanding effects on human tuberculosis and bovine tuberculosis in vitro.