ELECTRONIC JOURNAL OF ACTUAL PROBLEMS OF MODERN SCIENCE, EDUCATION AND TRAINING. FEBRUARY, 2021 -III. ISSN 2181-9750
http://khorezmscience.uz
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groups in the crystal parts of the Fibroin macromolecules is structured in the
following order [2].
Tyr
]
Gly)
(Ala
Gly
[Ser
Gly
Ala
Ala
Gly
Ser
Ala)
(Gly
3
2
2
The composition of amino acids in the amorphous part is determined in the
following order.
Ala
Gly
Tyr
Ala
Gly
Val
Gly
The fiber in the silk of the silkworm (Bombyx mori) consists of three chains: a
heavy chain, a light chain, and a glycoprotein P-25. Light chain(26 kDa) and heavy
chain (390 kDa(heavy chain can be up to 500 kDa)) are available in a 1:1 ratio,
connected by a disulfide chemical bond. Glycoprotein (25 kDa), called P-25, is not
associated with covalent bonds with heavy and light chain proteins[3]. The structure
and weight of the molecule of silk fibroin are also associated with the feeding
conditions of the silkworm, the region in which silk is grown.
From the silkworm plumage, not all silk fibers are obtained; 10-15% of the
silkworm plumage fiber remains together with the plumage. This is a fiber waste of
silk. Also, if the silkworm butterfly comes out of the cocoon, such a cocoon becomes
unsuitable for pulling a thread and becomes a waste. There are options for the
preparation of promising materials through the extraction of silk fibroin from such fiber
waste.
Today, preparations from silk fiber are used in pharmacology, medicine,
cosmetics, and other fields. From silk fibroin, skin resurfacing materials are
obtained[4-5].
“HF” obtained as a result of the hydrolysis of silk fibroin fibers, has a high
sorption capacity and is used in cosmetics and pharmacology. Applied in cosmetics,
“HF” positively affects and restores the skin, nails, and hair. Thanks to this, the aging
process in the skin slows down. The chemical composition of HF is similar to the
composition of proteins of the skin and nails, hair[6].
Simple thermal methods in acidic and alkaline environments have been studied
in the open bath module of obtaining powder-coated fibroin from natural silk fibroin[7-
10]. But the methods of obtaining powder-coated fibroin from silk fibroin under the
influence of extremely high-frequency rays in the open bath module have not been
studied. For the first time, we have developed a method of obtaining powder “HF”
from silk fibroin under the influence of extremely high-frequency rays. We plowed the
sorption properties of “HF”.
Various scientific researchers synthesized Au and Ag nanoparticles with silk
fibroin. Most of the experiments on the synthesis of Au and Ag nanoparticles with the
participation of silk fibroin were carried out under the influence of various rays (UV-,
electron rays) [11-13]. But to date, there are no reports of the chemical synthesis of
copper nanoparticles with the participation of silk fibroin in the existing literature. For
the first time, we synthesized copper nanoparticles from the copper-“HF” complex.
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