Silicone, by contrast, is a synthetic polymer made up of silicon, oxygen and other elements, most typically carbon and hydrogen. Silicone is generally a liquid or a flexible, rubberlike plastic, and has a number of useful properties, such as low toxicity and high heat resistance.ilicon is the 14th element on the periodic table. It's a metalloid, meaning it has properties of both metals and nonmetals, and is the second most abundant element in the Earth's crust, after oxygen.
heterophile antibody - an antibody found in the blood of someone suffering from infectious mononucleosis. Forssman antibody, heterophil antibody. antibody - any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response.
1 Rapid strep test and/or culture â negative. 2  Positive heterophile antibody (IgM antibodies not specific for EBV) â point-of-care testing (eg, Monospot) 3  Heterophile test is often negative in children <5 years; misses 50-70% of cases.  Antibodies develop after about day 5 of illness; do not test before 4-5 days.