Pra

Pra may refer to:

PRA

PRA is an abbreviation for:

Plasma renin activity

Plasma renin activity (PRA), also known as the renin (active) assay or random plasma renin, is a measure of the activity of the plasma enzyme renin, which plays a major role in the body's regulation of blood pressure, thirst, and urine output. PRA is sometimes measured, specially in case of certain diseases which present with hypertension or hypotension. PRA is also raised in certain tumors. A PRA measurement may be compared to a plasma aldosterone concentration as an aldosterone-to-renin ratio.

Measurement and Values

Measurement is done from a sample of venous blood using immunological measuring mechanisms like ELISA, RIA, etc. Often these are done by automated machines to minimize human error.

Considerations for variation

These values are quite variable in a normal person. Variation occur with the following:

Frente!

Frente! /frɛnteɪ/ (or Frente) are an Australian alternative rock and folk-pop group which originally formed in 1989. The original line-up consisted of Simon Austin on guitar and backing vocals, Angie Hart on lead vocals, Tim O'Connor on bass guitar (later replaced by Bill McDonald), and Mark Picton on drums (later replaced by Alastair Barden, then by Pete Luscombe). In August 1991 they issued their debut extended play, Whirled, which included the track, "Labour of Love". In March 1992 they released a second EP, Clunk, with its featured track, "Ordinary Angels", which peaked at No. 3 on the ARIA Singles Chart. It was followed in October by "Accidentally Kelly Street" (initially misspellt as "Accidently Kelly Street") which reached No. 4. Their debut album, Marvin the Album, issued in November, peaked at No. 5 on the ARIA Albums Chart. "Labour of Love" was released as an EP outside of Australasia in 1994 as a CD single with a cover version of New Order's "Bizarre Love Triangle" included. The Australian rock music historian Ian McFarlane felt that the group's "quirky, irreverent, acoustic-based sound was at odds with the usual guitar-heavy, grunge trends of the day. The band's presentation had a tweeness about it that could have been off-putting if not for its genuine freshness and honesty".

Video Genie

Video Genie (or simply Genie) was a series of computers produced by Hong Kong-based manufacturer EACA during the early 1980s. They were compatible with the Tandy TRS-80 Model I computers and could be considered a clone, although there were hardware and software differences.

The computers making up the series were

Although Video Genie was the name used in Western Europe, the machines were sold under different names in other countries. In Australia and New Zealand they were known as the Dick Smith System 80 MK I (EG3003) and System 80 MK II (EG3008), and in North America they were sold as the PMC-80 and PMC-81. In South Africa, the Video Genie was sold as the TRZ-80, a name similar to its rival.

In early 1983, the related Colour Genie machine was released by EACA.

PT-91 Twardy

The PT-91 Twardy ("hard","tough" or "resilient") is a Polish main battle tank. It is a development of the T-72M1 and first entered service in 1995. The PT-91 was designed at the OBRUM (OBRUM for Ośrodek Badawczo-Rozwojowy Urządzeń Mechanicznych – Polish for Research and Development Centre for Mechanical Appliances) and is produced by the Bumar Łabędy company – part of Polish military consortium – Bumar Group. Changes from the T-72 include a new dual-axis stabilized fire-control system, reactive armour, a more powerful engine, transmission and new automatic loader. Unlike many other T-72 upgrades the Polish Army PT-91s are upgraded using elements created almost exclusively by domestic companies (this includes new engine, fire control system and all communication system elements). Many of those elements were used to upgrade existing fleets of T-72 tanks in countries like in Czech Republic – T-72M4 CZ, Georgia – T-72SIM-1 or India – T-72 Ajeya Mk2.

History

In the late 1980s the Polish Army modernized all of its obsolete T-55 tanks to the T-55AM Mérida standard. The successful conversion convinced the General Staff that similar modernization could also be applied to other Soviet-designed tanks made in Poland and used by the Polish Armed Forces. In late 1988 it was decided to prepare a project of modernization for the T-72M1 design – using the experience from production of licensed T-72M (obiekt 172M-E3 – Polish army designation T-72), T-72M1 (obiekt 172M-E5), T-72M1K (Polish army designation T-72M1D).

PMC

PMC may refer to:

Computing

Municipal corporations

Places