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A cicada emerges from its nymphal exoskeleton; the shed exoskeleton is mostly modified chitin but the wings and much of the adult body are still unsclerotized chitin at this stage. Chitin (C 8 H 13 O 5 N) n (/ ˈ k aɪ t ɪ n / KY-tin) is a long-chain polymer of N-acetylglucosamine, an amide derivative of glucose.
A variety of techniques may be employed for the synthesis of a polymeric material with a range of architectures, for example living polymerization. Chain length A common means of expressing the length of a chain is the degree of polymerization , which quantifies the number of monomers incorporated into the chain.
Joints, especially synovial joints allow the body a tremendous range of movements. Each movement at a synovial joint results from the contraction or relaxation of the muscles that are attached to the bones on either side of the articulation. The type of movement that can be produced at a synovial joint is determined by its structural type.
Archelis (アルケリス arukerisu, from 歩ける椅子 arukeru isu, "walkable chair" in Japanese) is a wearable chair designed and manufactured by Yokohama-based mold factory, Nitto in association with Japan Polymer Technology, Chiba University's Center for Frontier Medical Engineering and Hiroaki Nishimura Design.
A biomaterial is a substance that has been engineered to interact with biological systems for a medical purpose – either a therapeutic (treat, augment, repair, or replace a tissue function of the body) or a diagnostic one. The corresponding field of study, called biomaterials science or biomaterials engineering, is about fifty years old.
The musculoskeletal system provides form, support, stability, and movement to the body. The human musculoskeletal system is made up of the bones of the skeleton, muscles, cartilage, [1] tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together.
Musculoskeletal specialists, manual therapists, neuromuscular physiologists and neurologists specialize in treating injuries and ailments in the soft tissue areas of the body. These specialized clinicians often develop innovative ways to manipulate the soft tissue to speed natural healing and relieve the mysterious pain that often accompanies ...
A concrete sand (specifically ASTM C33) bedding is preferable for building driveways with tighter joints (i.e., thinner cracks) because the sand is small enough to be raised up into the cracks when the pavers are compacted. This raised concrete sand helps lock the pavers in place so that they can handle more weight. [9] [10]
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