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A public service announcement (PSA) is a message in the public interest disseminated by the media without charge to raise public awareness and change behavior. Oftentimes these messages feature unsettling imagery, ideas or behaviors that are designed to startle or even scare the viewer into understanding the consequences of undergoing a particular harmful action or inaction (such as pictures ...
Electrical potential surface of paracetamol showing polar areas in red and blue. The polar surface area (PSA) or topological polar surface area (TPSA) of a molecule is defined as the surface sum over all polar atoms or molecules, primarily oxygen and nitrogen, also including their attached hydrogen atoms.
Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), P-30 antigen, is a glycoprotein enzyme encoded in humans by the KLK3 gene.PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland in men and the paraurethral glands in women.
The second PSA, from 1997, [3] featured 18-year-old actress Rachael Leigh Cook, who, as before, holds up an egg and says, "this is your brain", before lifting up a frying pan with the words, "and this is heroin", after which she places the egg on a kitchen counter—"this is what happens to your brain after snorting heroin"—and slams the pan down on it.
The Advertising Council, commonly known as Ad Council, is an American nonprofit organization that produces, distributes, and promotes public service announcements or PSAs on behalf of various sponsors, including nonprofit organizations, non-governmental organizations and agencies of the United States government.
The campaign has been widely parodied, with references in Will & Grace, 30 Rock, American Dad!, Family Guy, [6] Drawn Together, Scrubs, recurring parodies on Late Night with Conan O'Brien, a running segment on The Daily Show called "The Less You Know", and an April 2006 series of NBC-produced mock PSAs starring the cast of The Office.
These are lists of research topics, research problems and current research activities in various scientific areas. Pages in category "Lists of research topics" The following 3 pages are in this category, out of 3 total.
Pressure swing adsorption (PSA) is a technique used to separate some gas species from a mixture of gases (typically air) under pressure according to the species' molecular characteristics and affinity for an adsorbent material.