Xem 1-8 trên 8 kết quả Crystal fiber
  • Generally the term photonic crystal refers to two dimensional (2-D) and three dimensional (3-D) structures. Using 2-D and 3-D photonic crystals it is possible to control the propagation of light at arbitrary angles of incidence and not only the light normally incident as is the case for conventional optical films. Further, using photonic crystals, it is possible to achieve optical functionality not possible using conventional optical materials. This book provides a complete overview about photonic crystals including properties, applications, approaches and methods for the study....

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  • In 2009 the world celebrated 50 years of lasers, bringing to the attention of the public how deeply lasers and laser related technologies have revolutionized both science and everyday life. Next year will be the fiftieth anniversary of the semiconductor laser. Used as a compact light source with high modulation rates, it transformed telecommunications in combination with glass fibers. Today laser diodes are omnipresent in data storage and communication. Still, most of these applications are based on infrared or red laser diodes.

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  • The nano-scale spatial organization of metallic and other inorganic materi-als into 1D objects is a key task in nanotechnology. Nano-scale fibers and tubes are very useful templates for such organization because of their inherent 1D organization. Fibrillar biological molecules and biomolecular assemblies are excellent physical supports on which to organize the inor-ganic material.

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  • We used generalized two-dimensional NMR–NMR correlation to examine the effect of potassium ions on the conformation transition in silk fibroin to investigate the possibility that the fairly high K + ion content found in the distal end of silk-secreting ducts in the silkworms could have a bearing on natural formation of the silk fiber.

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  • The eye lens is composed of fiber cells that differentiate from epithelial cells on its anterior surface. In concert with this differentiation, a set of proteins essential for lens function is synthesized, and the cellular organelles are degraded.

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  • Nociceptors are specialized nerve fibers that transmit noxious pain stimuli to the dorsal horn of the spinal cord. A subset of nociceptors, the nonpepti-dergic C-fibers, is characterized by its reactivity for the plant isolectin B4 (IB4) from Griffonia simplicifolia. The molecular nature of the IB4-reactive glycoconjugate, although used as a neuroanatomical marker for more than a decade, has remained unknown.

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  • AChRe )⁄ ) mice lacke-subunits of the acetylcholine receptor and thus fail to express adult-type receptors. The expression of fetal-type receptors throughout postnatal life alters postsynaptic signal transduction and causes a fast-to-slow fiber type transition, both in slow-twitch soleus muscle and in fast-twitch extensor digitorum longus muscle.

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  • Gazing into the future may be possible for the few clairvoyants living among us, but building a telecommunication network based on psychic prediction would be like basing critical business decisions on a coin flip. Still, today’s telecommunication buzzword for any fiber-to-the-premise (FTTP) network is “future-proofing.” Without a crystal ball to examine future bandwidth needs and determine winning technologies, service providers face some major challenges in getting it right the first time....

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