| silent myocardial infarction |
infarction occurring without pain or other symptoms; it may be recognized by electrographic or postmortem examination.
출처: www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspz...
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| silicon |
Silicon is the chemical element in the periodic table that has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. It is the second most abundant element in the Earth's crust, making up 25.7% of it by weight. It occurs in clay, feldspar, granite, quartz and sand, mainly in the form of silicon dioxide (also known as silica) and silicates (compounds containing silicon, oxygen and metals). ...
출처: en.wikipedia.org/wiki/Silicon
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| silica gel |
Silica gel is a granular, porous form of silica made synthetically from sodium silicate. Despite the name, silica gel is a solid. It is usually distributed in the form of beads, which are packaged in a semi-permeable packet. It was created at Johns Hopkins University, Baltimore, Maryland in the 1920s. Its high porosity, around 800 m²/g, allows it to adsorb water readily, making it useful as a desiccant (drying agent). ...
출처: en.wikipedia.org/wiki/Silica_gel
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| silk |
Silk (< OE sioloc probably < L. SERICVS / Gr. σηρικóς ("silken") < L. SERES / Gr. Σηρες ("Chinese") or alternatively < Ch. 丝 or 絲 (pronounced "sī") meaning "silk", the pictogram representing two strands of silk.)is a natural protein fiber that can be woven into textiles. It is obtained from the cocoon of the silkworm larva, in the process known as sericulture, which kills the larvae. ...
출처: en.wikipedia.org/wiki/Silk
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| silicone |
Silicones, or polysiloxanes, are inorganic polymers consisting of a silicon-oxygen backbone (...-Si-O-Si-O-Si-O-...) with side groups attached to the silicon atoms. Certain organic side groups can be used to link two or more of these -Si-O- backbones together. By varying the -Si-O- chain lengths, side groups, and crosslinking, silicones can be synthesized into a wide variety of materials. They can vary in consistency from liquid to gel to rubber to hard plastic. ...
출처: en.wikipedia.org/wiki/Silicone
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