To detect heart sounds, the patient should be lying down and examined in a quiet room. Left-sided S3 is best heard at the apex of the heart (the lower pointed end of the heart) with the patient lying on his left side. It is a low-pitched sound and heard best using the bell of the stethoscope with light pressure.
Adorable animal families that will make you aww. Polystyrene is a type of polymer with thermoplastic properties produced from the petroleum-derived monomer, styrene. In solid form, it is a colorless and rigid plastic, but it may also be returned to a liquid state by heating, and used again for molding or extrusion.
Many items we use every day, like zippers and escalators, were once brand names. Even heroin, which no one should use any day, was a brand name. These names are or were trademarked, but are now often used to describe any brand in a product category.xpanded polystyrene is the generic name for the material that we typically think of as Styrofoam. The brand is a trademark of the Dow Chemical Company that is made in sheaths for construction projects and is never made in the shape of a plate, cup or cooler.