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 0.25438+0 cm. Length 1.5 to 2.5cm, width 1 to 2cm and thickness 1 cm. The surface is yellowish white or light brown, smooth, with 2 to 3 ridges. The mesocarp (shell) is bony and hard. The endosperm is membranous, with a wide oval or oval nucleolus, light brown at one end and golden yellow at the other. The outer layer of the cross section is yellow and gelatinous, and the inner layer is light yellow or light green, powdery, with gaps in the middle.

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

Chemical constituents of Guo Shuang.

The seeds of Duobai Guo Shuang contain a small amount of cyanoside, gibberellin and activin. Two ribonucleases were also isolated from endosperm. The approximate 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. Seed coat contains toxic components, such as ginkgolic acid, hydrogenated ginkgolic acid, hydrogenated ginkgolic acid, ginkgolic acid and ginkgolic acid.

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