Development of natural color resources

Mulberry silk has excellent shielding and absorption of ultraviolet rays (UV-B) at a wavelength of about 280 nm that easily induces gene mutations and cancers such as skin cancer, and the transmittance of UV-B is less than 0.5%. The transmittance of UV-B is less than 0.5%, and the transmittance of UV-A and UV-C is less than 2%.

The silkworms of silk insects, such as wild silk silk, are not only effective for shielding UV-B, but also have good shielding effect for full-wavelength ultraviolet rays, and the pass rates are all less than 0.5%. Therefore, a variety of silk insect products spit color spun silk products can effectively prevent the harm of UV-C silk insect silk gills outer sericin, there is a good antibacterial effect, when the gill silk will retain some sericin, silk It also has a good antibacterial ability, in which color silk has better antibacterial effect. From comparative experiments conducted with non-woven fabrics made of wild silk and cotton gauze and cotton wound dressings, it was found that the wild silk non-woven fabrics can inoculate against yellow staphylococcus, MRSA, Pseudomonas, Escherichia coli, and Bacillus subtilis. The number of bacteria decreased by 99.9%. However, with cotton gauze or cotton wound dressings, the number of bacteria will not decrease, but it will increase 250 times.

In life activities, organisms will continue to produce a variety of reactive oxygen radicals, such as superoxide anion radicals <O2>, singlet oxygen (1O2), hydrogen peroxide (H2O2), and hydroxyl radicals (HO). The free radical oxidizing ability is strong, it can destroy many functional molecules of organisms and cause poison to the organism. Silk has the activity of decomposing free radicals. Color silk is more efficient than white silk in the decomposition of free radicals. Among them, green silk has the best effect, and can decompose 90% of active free radicals. Yellow silk also has 5% or so of efficacy. White silk has About 30% of efficacy. Make colored silk underwear, or make a good cosmetic skin care beauty effect.

The silkworm and bee family of the Zhejiang University’s Animal Husbandry Academy used the natural silkworm gene of the silkworm species to obtain a good color breeding material, and a series of practical color varieties were selected. The natural silkworm cocoons developed have yellow, red, and green varieties, but there are problems such as small cocoon shape and low dry shell volume compared with white cockroaches that are commonly crossed by color cocoons, and with the increase of feeding 1, the silkworm body will appear weak and weak. Degradation. Since 2000, the Sericulture Research Institute of Soochow University has cooperated with Japan and Cambodia to use Cambodia's tradition of producing colored dragonflies to put improved colored dragonfly in Cambodia, and to use colorful silk yarns bred by farmers to develop busy machinery in China. In 2001, it has already invested in the Japanese market.