Silkworm eggs

Silkworm eggs

(classified materia medica)

[synonym] silkworm eggs.

[source] it is the egg of Bombyx mori. For animal morphology, please refer to "silkworm moth".

[chemical composition] the general chemical composition of silkworm eggs is as follows: moisture 59.90%, ash 1.5%, crude fat 8.37%, crude fiber 0.75%, dextrin 0.67%, starch 0.08%, reducing sugar 0.75%, protein 24.50%, ammonia nitrogen 0.015%, amide nitrogen 0.014%, amino acid nitrogen 0.190%.

During dormancy, the glycogen contained in the egg changes into sorbitol and glycerol, and at the end of dormancy, the latter two become glycogen again. Silkworm eggs also contain trehalose. The highest content was found 2-3 days before hatching.

The water-soluble proteins of the unheated silkworm eggs are hyaluronic acid, albumin and globulin, while the heated dried silkworm eggs contain glutenin and gliadin besides the three proteins mentioned above.

The amino acids of silkworm protein are glycine, leucine, isoleucine, tyrosine, proline, glutamic acid, aspartic acid (the content of the above amino acids is more, about 4-6%), histidine (the content is the least, about 1.5%), and other amino acids are about 2-3%. The free amino acids and similar substances of silkworm eggs are: phenylalanine, leucine, valine, tyrosine, proline, histidine, methionine sulfoxide, alanine, glutamic acid, glycine, serine, lysine, glutamine, aspartic acid, cystine, taurine, threonine, etc. In a word, the amino acids of silkworm seeds are the same as those of mulberry leaves, but there are more methionine and other substances.

After 12 hours of egg production, each gram contained 2500 micrograms of 3-hydroxy canine urea. Three days later, the eggs contained 1600 micrograms of purple pigment and 225 micrograms of yellow pigment. Wormhole pigment is one of the wormhole pigments. It also exists in the eyes of spiders, mosquitoes and other insects. Wormhole is also a similar substance. They are derivatives of dog urea. 231 mg of trypsin was isolated from 20 g silkworm eggs. The increase of the pigment content of the worm eye was parallel to the decrease of the 3-hydroxyurea content of the dog.

The silkworm contains uric acid. 24.2 g of crude pterin pigment was isolated from 30 kg eggs of the white winged moth.

Silkworm eggs contain vitamin A, 1 IU / g (white), 12-14 IU / g (yellow), vitamin b1-230 μ g%, vitamin c-83 mg%, vitamin D trace. Riboflavin was found in the whole development of silkworm. Flavin adenine dinuclear glycosides are present only before hatching (and in new larvae).

The content of coenzyme I and coenzyme II in silkworm eggs increased at the early stage of dormancy. Silkworm eggs contain many kinds of enzymes, including respiratory enzymes such as succinate dehydrogenase and malate dehydrogenase, as well as L-amino acid oxidase and tyrosinase. Catalase is very rare in the primiparous silkworm eggs, and then increases gradually. After the eggs change color, the activity remains constant. Acetylcholinesterase began to appear after the reversal phase and then gradually increased

The silkworm ash contains 8.15% calcium carbonate, iron, manganese, phosphorus and oxygen. 81 mg / kg fresh eggs. Each gram (dry weight) of egg contained 211.88 micrograms of zinc.

[functions and indications] ① in Zi Mu Mi Lu: "it's difficult to produce when it's down to cure. Burn powder, drink three money. "

② "Wei Wei Jia Bao Fang": "treating heat and drenching like blood. Burn ashes, add a little musk, and take two coins with water. "