Spinning silks

Although spider and insect spinning silks are different and their silk types and functions diverse (Craig, 2003 Foelix, 1996), it is strongly... 

Rayon is made from cellulose. Count Chardonnet made the synthetic fibre from mulberry leaves. Chardonnet was studying the diseases of the silkworms. He was inspired by the silkworm spinning silk to find a way to make artificial silk. He made artificial silk from the cellulose he obtained from mulberry leaves by a complex process. 

There are all sorts of silk that are found in nature. The stuff that is usually found in textiles comes from silkworms (Bombyx mori). They are not really worms, but the larvae of moths. They emerge from very small eggs with an incredible lust for mulberry leaves, which they consume until they are ready to. pupate and weave a cocoon around themselves. Unlike spiders, which spin silk from their rear end, silkworm silk is actually hardened saliva, which comes out of the mouth. The larva has a small spinneret on its lip, through which the silk emerges. The cocoon is formed from a single strand of silk that... 

Damage Caterpillars spin silk webbing around leaves of vegetables, strawberries, and some weeds, devouring enclosed leaves. 

Count Hilaire de Chardonnet was an assistant to Pasteur during the silkworm saga. He became fascinated with the way silkworms spin silk, and he thought that, by understanding what the worm did, humankind could also learn to spin the desirable fiber. He was never able to duplicate silk, but he did... 

Other types of spider webs include tangle webs and sheet webs sptm by different species. Many other insects spin silk fibers for cocoons, shelter, egg sacs, egg stalks, and tunnels. For example, tarantulas use silk to spin tunnel-shaped shelters, and spin fibers from their feet as support lines. Caddisfiy larvae spin underwater tubes and nets, and the aquatic midge spins underwater silk tubes. Honeybee larvae spin silk to inCTease the mechanical strength and thermal stability of the beehive. These silks are subject to inaeasing amounts of research, as reviewed in Reference 11. 

NMR experiments. Silk I is the dried form of the fibroin produced by the middle silk gland of silkworms, while silk II is obtained after spinning. Silk I is essentially a precursor to silk II, with the structural transition from silk I to silk II only affecting the crystaUine region of the silkworm silk fibroin [164]. Hence, attempts to impart crystaUinity via macroscopic orientation often led to the conversion of silk I to silk II [153]. CP/MAS NMR allowed... 

Silk is a protein fiber spun by silkworm, which is the caterpillar or larva of the domesticated silkmoth, Bombyx mori. In addition to silkworm, many other insects or non-insects (eg., spider) can spin silk fibers. However, the silk of Bombyx mori is the mainstay of commercial silk production and consumption. This section will only discuss the formation of silk fiber by silkworm. 

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