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Silicone is often confused with one of its constituent elements, silicon, but they are distinct substances. Silicon is a chemical element, a hard dark-grey semiconducting metalloid, which in its crystalline form is used to make integrated circuits ("electronic chips") and solar cells. Silicones are compounds that contain silicon, carbon ...
In its uncured state, silicone rubber is a highly adhesive gel or liquid. To convert it to a solid, it must be cured, vulcanized, or catalyzed.This is normally carried out in a two-stage process at the point of manufacture into the desired shape, and then in a prolonged post-cure process.
The rubbery, vinegary-smelling silicone caulks, adhesives, and aquarium sealants are also well-known. PDMS is also used as a component in silicone grease and other silicone based lubricants, as well as in defoaming agents, mold release agents, damping fluids, heat transfer fluids, polishes, cosmetics, hair conditioners and other applications.
silico-: from Latin, silicon; volcano: from Latin, referring to volcano; coni: from ancient Greek (κόνις, kónis) which means dust-osis: from ancient Greek, suffix to indicate a medical condition; This word was invented at a meeting of the National Puzzlers' League (N.P.L.) by its president Everett M. Smith.
2. 1348 – Black Death. The Black Death, one of history’s deadliest pandemics, ravaged Europe from 1347 to 1351. Caused by the bacterium Yersinia pestis and primarily spread by fleas on rats ...
Silicone rubber applications such as catheters are widespread in medicine, but have several limitations. For example, they exhibit poor tear strength and poor resistance to fatigue . Brittle fracture can occur from defects within sections owing to poor control of vulcanization . [ 2 ]
They say the Joro spider is not harmful to people. The website says the spider tends avoid confrontation with humans. The spider does have small fangs, but they are only strong enough to eat other ...
Others say that it could be dangerous for human health as maggots could survive the bite and and create myiasis, micro-perforations in the intestine, but so far, no such case has been linked to ...