News tagged with silicon

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FDA approves new silicone breast implants

(HealthDay)—MemoryShape breast implants have been approved by the U.S. Food and Drug Administration for breast augmentation in women 22 and older, and for breast reconstruction, the FDA said Friday.

Jun 17, 2013
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Breast implant scare: One in four found flawed

Doctors in France have removed PIP breast implants from more than 16,000 women and found a quarter of the scandal-tainted products had signs of splitting or leakage, a watchdog said on Tuesday.

Jun 25, 2013
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UK experts: Cosmetic surgery needs tighter rules

A group of independent experts has slammed Britain's cosmetic surgery industry for not protecting patients adequately and is calling for stricter controls in the aftermath of a breast implant scandal in Europe last year that ...

Apr 23, 2013
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New device will advance cancer treatment

(Medical Xpress) -- The future of prostate cancer therapy may lie in a tiny, "sticky" silicon chip dubbed GEDI (Geometrically Enhanced Differential Immunocapture, pronounced like the "Star Wars" forces of good) that can identify ...

Jun 28, 2012
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Silicon (pronounced /ˈsɪlɨkən/ or /ˈsɪlɨkɒn/, Latin: silicium) is the most common metalloid. It is a chemical element, which has the symbol Si and atomic number 14. The atomic mass is 28.0855. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon. As the eighth most common element in the universe by mass, silicon very rarely occurs as the pure free element in nature, but is more widely distributed in dusts, planetoids and planets as various forms of silicon dioxide (silica) or silicates. On Earth, silicon is the second most abundant element (after oxygen) in the crust, making up 25.7% of the crust by mass.

Silicon has many industrial uses. It is the principal component of most semiconductor devices, most importantly integrated circuits or microchips. Silicon is widely used in semiconductors because it remains a semiconductor at higher temperatures than the semiconductor germanium and because its native oxide is easily grown in a furnace and forms a better semiconductor/dielectric interface than any other material.

In the form of silica and silicates, silicon forms useful glasses, cements, and ceramics. It is also a constituent of silicones, a class-name for various synthetic plastic substances made of silicon, oxygen, carbon and hydrogen, often confused with silicon itself.

Silicon is an essential element in biology, although only tiny traces of it appear to be required by animals. It is much more important to the metabolism of plants, particularly many grasses, and silicic acid (a type of silica) forms the basis of the striking array of protective shells of the microscopic diatoms.

This text uses material from Wikipedia, licensed under CC BY-SA

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