PG

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picogram

 (pg) [pi´ko-gram]
one trillionth (10−12) of a gram.

prostaglandin

 [pros″tah-glan´din]
any of a group of naturally occurring, chemically related, long-chain hydroxy fatty acids that stimulate contractility of the uterine and other smooth muscle and have the ability to lower blood pressure, regulate acid secretion of the stomach, regulate body temperature and platelet aggregation, and control inflammation and vascular permeability. They also affect the action of certain hormones. First found in semen, they have since been found in cells throughout the body and in menstrual fluid. There are nine types, designated by the letters A to I, the degree of saturation of the side chain of each being designated by subscripts 1, 2, and 3.

Prostaglandins are used clinically to control postpartum hemorrhage, to temporarily manage patent ductus arteriosus, and to treat impotence in men; prostaglandin injections into the amniotic sac, an in-hospital procedure, have been used as an abortion technique in pregnancies after the 16th week. About 30 minutes after an injection of prostaglandin F, contractions begin, and abortion takes place within 19 to 20 hours.

PG

Abbreviation for prostaglandin; phosphatidylglycerol; protegrin.

pg

Symbol for picogram.

PG

1. Postgraduate.
2. Prostaglandin, see there.
3. Proteoglycan.

pg

Abbreviation for picogram.
References in periodicals archive ?
A Man Called Ove (2012) by Fredrik Backman (PG-13, 7.7, 2015)
The PG-13 'Deadpool 2' will also be Fox's way of testing the waters if a less profane and violent 'Deadpool' movie could also find success among a younger audience.
The frequency and increase in tobacco incidents in PG-13 movies is of public health concern because these movies are rated as appropriate for youths.
Parents need to view PG-13 films first to see if there is more violence than they want their children to see, or use more accurate movie-rating sites like www.kidsin-mind.com that uses objective data to rate sex, language, and violence.
Rated PG-13. Starring Will Smith, Tommy Lee Jones and Josh Brolin.
For instance, Lois Lowry only provides a few clues about the physical world in her novel The Giver (1993), so it provides an interesting comparison to the very visual film adaptation (PG-13, 6.5, 2014).
He said that people have to wonder why we are seeing this surge in gun violence in PG-13 movies, when it isn't appearing in G, PG and R-rated films.
During the flight, an unnamed family became concerned that the film, the PG-13 action thriller "Alex Cross," was too inappropriate to be shown to its two young children, (http://www.theatlantic.com/national/archive/2013/04/the-way-we-live-now-united-airlines-and-disruptive-passengers/274512/) The Atlantic reports.
Many PG or PG-13 movies are as violent as movies rated R by the MPAA.
The Hollywood Reporter on Monday (http://www.hollywoodreporter.com/news/germany--tighter-restrictions-violent-films-dark-knight-rises-352980) reported about a proposed law in Germany that would prohibit anyone under 12 from seeing movies rated 12+, Germany's equivalent to the PG-13 rating doled out by the Motion Picture Association of America.
Movie smoking exposure (MSE) was estimated from 532 recent hit movies, categorized into three of the ratings brackets used by the Motion Picture Association of America to rate films by content - G/PG, PG-13, and R.
"On the tentpole front, it is understood that a script needs to be brought in at PG-13," says scribe Matt Manfredi, who has found himself on both sides of the ratings divide over the past decade.