RIA

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radioimmunoassay

 (RIA) [ra″de-o-im″u-no-as´a]
a sensitive assay method that can be used for the measurement of minute quantities of specific antibodies or any antigen, such as a hormone or drug, against which specific antibodies can be raised. An assay for a specific hormone uses antihormone antibody produced by injecting the human hormone into an animal, such as a rabbit, and hormone that has been labeled with a radioisotope. These are mixed with the assay specimen and the antigen (hormone) bound to antibody is separated from the unbound antigen by chromatography or other means. Because any hormone in the assay specimen competes with the radiolabeled hormone for antibody binding sites, the amount of hormone in the specimen is inversely proportional to the radioactivity of the bound fraction or directly proportional to the activity of the free fraction. This is the standard method for clinical laboratory measurements of hormones and is also used for therapeutic drug monitoring, drug abuse screening, and other laboratory tests.

RIA

Abbreviation for radioimmunoassay.

RIA

abbr.
radioimmunoassay

RIA

Abbreviation for radioimmunoassay.
References in periodicals archive ?
MAI Capital Management is a fee-based registered investment adviser and wealth management firm that manages and advises approximately USD 5.4bn in assets as of March 31, 2019, and provides comprehensive investment management and planning services to high-net-worth individuals, families and athletes.
14 May 2019 - California, US-based registered investment adviser EP Wealth Advisors, LLC has acquired Seattle, US-based Conlon Dart Wealth Management to enhance reach in Northwestern US, the company said.
Federal credit unions can't offer investment advice, but they can establish a shared employee arrangement with a third-party registered investment adviser, according to a legal opinion letter by NCUA Associate General Counsel Sheila Albin.
The report found that more than one-third of affluent investors now consider using an independent adviser, such as a registered investment adviser or a certified financial planner, Cochran said.
Through Schwab Institutional, CPAs can access a list of registered investment adviser consultants (RIAC).
First Trust Advisors LP, a federally registered investment adviser and serves as the fund's investment adviser.
Aberdeen Asset Management Inc is a registered investment adviser. In the US, Aberdeen Standard Investments is the marketing name for the following affiliated, registered investment advisers: Aberdeen Standard Investments ETFs Advisors LLC, Aberdeen Asset Management Inc, Aberdeen Asset Managers Ltd, Aberdeen Standard Investments Australia Ltd, Aberdeen Standard Investments (Asia) Ltd, Aberdeen Asset Capital Management LLC, Standard Life Investments (Corporate Funds) Ltd and Standard Life Investments (USA) Ltd.
San Antonio Federal Credit Union, San Antonio, announced that Charles Lutz, a registered representative affiliated with broker-dealer and SEC registered investment adviser CUSO Financial Services LP, achieved Gold Pacesetter status in 2008.
Brezik, CPA/PFS, president of an investment management and financial planning company with offices in Wyoming and other states, emphasized the importance of quality and integration among the various products and services used by a registered investment adviser, as well as the need for business development services.
LMM LLC is a registered investment adviser founded in 1999, and serves as the investment manager for the Miller Value Funds family.
A registered investment adviser has a fiduciary responsibility to work in the client's best interest; the broker has a fiduciary responsibility to the broker-dealer.
Lincoln Investment Capital Holdings is the parent company of Lincoln Investment Planning, LLC, a full-service independent broker-dealer and registered investment adviser.

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