The chemical constituents of bamboo leaf extract include flavonoids and their glycosides, polysaccharides, special amino acids and their peptides, aromatic components and various trace elements such as manganese, zinc and selenium. Their application value is comparable to that of ginkgo. From the structure-activity relationship, the physiological activity of bamboo leaf flavonoids exceeds that of ginkgo flavonoids, and the bamboo leaf extract contains active polysaccharides, special amino acids and aromatic substances that are not found in Ginkgo biloba extract.
1. 1 Flavonoids
Bamboo leaf flavonoids are the main active constituents in bamboo leaf extracts, mainly flavonoid glycoside represented by orientin, homoorientin, vitexin) and isovitexin, mainly composed of carbon glucosides at positions 6 and 8.
1. 2 Polysaccharide
Studies have found that bamboo extracts contain polysaccharides. Different varieties of bamboo leaf polysaccharides are mainly composed of arabinose, xylose, glucose and galactose, of which xylose accounts for 43.9% to 65.5%, arabinose accounts for 11.7% to 19.6%, and glucose accounts for 7. 2%至 20. 8%, galactose accounted for 7.7% to 14.1%.
1. 3 Special amino acids
17 kinds of common amino acids were isolated by acid hydrolysis, the total amount was 10. 35%; the highest glutamic acid content, accounting for 13.56% of the total amino acids, a total of threonine, proline, methionine was detected. , 7 kinds of essential amino acids such as isoleucine, leucine, phenylalanine and lysine. These 7 amino acids account for about 42.32% of the total amino acids.
1. 4 Volatile components
It has been found that the main components of volatile substances in bamboo leaves are alcohols, ketones, aldehydes, phenols, carboxylic acids and furans. The main chemical component of the volatile oil of bamboo leaves is 3-methyl-2-butanol. The other main chemical components are 4-vinyl-2-methoxy-phenol, hex-2-enal, nerolidol, phytol, Phenylacetaldehyde, geranium aldehyde, phytonone, dihydro kiwi lactone and different
1. 5 Chlorophyll
The chlorophyll extracted from bamboo leaves is divided into two forms: chlorophyll copper sodium salt and chlorophyll copper. The chlorophyll copper sodium salt is a powdery product with a dark green color and a slightly metallic luster. The chlorophyll copper extracted from bamboo leaves is a green viscous product with a clear aroma and is easily soluble in water.
1. 6 Mineral elements
It has been found that the bamboo stalks of Leizhu and Phyllostachys pubescens contain Fe, Al, Ca, Mg, Ba, Mn, Zr, Ti, Pb, Sn, Ga, Cr, Ni, Mo, Cu, Yb, Zn, Sr, K, 23 trace elements such as Na, P, B and Si.
1. 7 Tea polyphenols
The content of the polyphenols in the stalks of the stalks was 1.60%. The tea polyphenol content of the bamboo leaves is 1. 43%
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